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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
| <span id="2"> 2</span> |
| <span id="3"> 3</span> |
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| <span id="1000">1000</span> |
| <span id="1001">1001</span> |
| <span id="1002">1002</span> |
| <span id="1003">1003</span> |
| <span id="1004">1004</span> |
| <span id="1005">1005</span> |
| <span id="1006">1006</span> |
| <span id="1007">1007</span> |
| <span id="1008">1008</span> |
| <span id="1009">1009</span> |
| <span id="1010">1010</span> |
| <span id="1011">1011</span> |
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| <span id="1016">1016</span> |
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| <span id="1019">1019</span> |
| <span id="1020">1020</span> |
| <span id="1021">1021</span> |
| <span id="1022">1022</span> |
| <span id="1023">1023</span> |
| <span id="1024">1024</span> |
| <span id="1025">1025</span> |
| <span id="1026">1026</span> |
| <span id="1027">1027</span> |
| <span id="1028">1028</span> |
| <span id="1029">1029</span> |
| <span id="1030">1030</span> |
| <span id="1031">1031</span> |
| <span id="1032">1032</span> |
| <span id="1033">1033</span> |
| <span id="1034">1034</span> |
| <span id="1035">1035</span> |
| <span id="1036">1036</span> |
| <span id="1037">1037</span> |
| <span id="1038">1038</span> |
| <span id="1039">1039</span> |
| <span id="1040">1040</span> |
| <span id="1041">1041</span> |
| <span id="1042">1042</span> |
| <span id="1043">1043</span> |
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| <span id="1045">1045</span> |
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| <span id="1048">1048</span> |
| <span id="1049">1049</span> |
| <span id="1050">1050</span> |
| <span id="1051">1051</span> |
| <span id="1052">1052</span> |
| <span id="1053">1053</span> |
| <span id="1054">1054</span> |
| <span id="1055">1055</span> |
| <span id="1056">1056</span> |
| <span id="1057">1057</span> |
| <span id="1058">1058</span> |
| <span id="1059">1059</span> |
| <span id="1060">1060</span> |
| <span id="1061">1061</span> |
| <span id="1062">1062</span> |
| <span id="1063">1063</span> |
| <span id="1064">1064</span> |
| <span id="1065">1065</span> |
| <span id="1066">1066</span> |
| <span id="1067">1067</span> |
| <span id="1068">1068</span> |
| <span id="1069">1069</span> |
| <span id="1070">1070</span> |
| <span id="1071">1071</span> |
| <span id="1072">1072</span> |
| <span id="1073">1073</span> |
| <span id="1074">1074</span> |
| <span id="1075">1075</span> |
| <span id="1076">1076</span> |
| <span id="1077">1077</span> |
| <span id="1078">1078</span> |
| <span id="1079">1079</span> |
| <span id="1080">1080</span> |
| <span id="1081">1081</span> |
| <span id="1082">1082</span> |
| <span id="1083">1083</span> |
| <span id="1084">1084</span> |
| <span id="1085">1085</span> |
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| <span id="1470">1470</span> |
| <span id="1471">1471</span> |
| <span id="1472">1472</span> |
| <span id="1473">1473</span> |
| <span id="1474">1474</span> |
| <span id="1475">1475</span> |
| <span id="1476">1476</span> |
| <span id="1477">1477</span> |
| <span id="1478">1478</span> |
| <span id="1479">1479</span> |
| <span id="1480">1480</span> |
| <span id="1481">1481</span> |
| <span id="1482">1482</span> |
| <span id="1483">1483</span> |
| <span id="1484">1484</span> |
| <span id="1485">1485</span> |
| <span id="1486">1486</span> |
| <span id="1487">1487</span> |
| <span id="1488">1488</span> |
| <span id="1489">1489</span> |
| <span id="1490">1490</span> |
| <span id="1491">1491</span> |
| <span id="1492">1492</span> |
| <span id="1493">1493</span> |
| <span id="1494">1494</span> |
| <span id="1495">1495</span> |
| <span id="1496">1496</span> |
| <span id="1497">1497</span> |
| <span id="1498">1498</span> |
| <span id="1499">1499</span> |
| <span id="1500">1500</span> |
| <span id="1501">1501</span> |
| <span id="1502">1502</span> |
| </pre><pre class="rust "> |
| <span class="comment">// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT</span> |
| <span class="comment">// file at the top-level directory of this distribution and at</span> |
| <span class="comment">// http://rust-lang.org/COPYRIGHT.</span> |
| <span class="comment">//</span> |
| <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> |
| <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> |
| <span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> |
| <span class="comment">// option. This file may not be copied, modified, or distributed</span> |
| <span class="comment">// except according to those terms.</span> |
| |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">cmp</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ops</span>; |
| |
| <span class="kw">use</span> {<span class="ident">Expr</span>, <span class="ident">CharClass</span>, <span class="ident">ClassRange</span>, <span class="ident">ByteClass</span>, <span class="ident">ByteRange</span>, <span class="ident">Repeater</span>}; |
| |
| <span class="doccomment">/// A set of literal byte strings extracted from a regular expression.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Every member of the set is a `Lit`, which is represented by a `Vec<u8>`.</span> |
| <span class="doccomment">/// (Notably, it may contain invalid UTF-8.) Every member is said to be either</span> |
| <span class="doccomment">/// *complete* or *cut*. A complete literal means that it extends until the</span> |
| <span class="doccomment">/// beginning (or end) of the regular expression. In some circumstances, this</span> |
| <span class="doccomment">/// can be used to indicate a match in the regular expression.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Note that a key aspect of literal extraction is knowing when to stop. It is</span> |
| <span class="doccomment">/// not feasible to blindly extract all literals from a regular expression,</span> |
| <span class="doccomment">/// even if there are finitely many. For example, the regular expression</span> |
| <span class="doccomment">/// `[0-9]{10}` has `10^10` distinct literals. For this reason, literal</span> |
| <span class="doccomment">/// extraction is bounded to some low number by default using heuristics, but</span> |
| <span class="doccomment">/// the limits can be tweaked.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Literals</span> { |
| <span class="ident">lits</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span>, |
| <span class="ident">limit_size</span>: <span class="ident">usize</span>, |
| <span class="ident">limit_class</span>: <span class="ident">usize</span>, |
| } |
| |
| <span class="doccomment">/// A single member of a set of literals extracted from a regular expression.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This type has `Deref` and `DerefMut` impls to `Vec<u8>` so that all slice</span> |
| <span class="doccomment">/// and `Vec` operations are available.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">Ord</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Lit</span> { |
| <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>, |
| <span class="ident">cut</span>: <span class="ident">bool</span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Literals</span> { |
| <span class="doccomment">/// Returns a new empty set of literals using default limits.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">empty</span>() <span class="op">-></span> <span class="ident">Literals</span> { |
| <span class="ident">Literals</span> { |
| <span class="ident">lits</span>: <span class="macro">vec</span><span class="macro">!</span>[], |
| <span class="ident">limit_size</span>: <span class="number">250</span>, |
| <span class="ident">limit_class</span>: <span class="number">10</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Get the approximate size limit (in bytes) of this set.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">limit_size</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="ident">limit_size</span> |
| } |
| |
| <span class="doccomment">/// Set the approximate size limit (in bytes) of this set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If extracting a literal would put the set over this limit, then</span> |
| <span class="doccomment">/// extraction stops.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The new limits will only apply to additions to this set. Existing</span> |
| <span class="doccomment">/// members remain unchanged, even if the set exceeds the new limit.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_limit_size</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">size</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span> { |
| <span class="self">self</span>.<span class="ident">limit_size</span> <span class="op">=</span> <span class="ident">size</span>; |
| <span class="self">self</span> |
| } |
| |
| <span class="doccomment">/// Get the character class size limit for this set.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">limit_class</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="ident">limit_class</span> |
| } |
| |
| <span class="doccomment">/// Limits the size of character(or byte) classes considered.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// A value of `0` prevents all character classes from being considered.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This limit also applies to case insensitive literals, since each</span> |
| <span class="doccomment">/// character in the case insensitive literal is converted to a class, and</span> |
| <span class="doccomment">/// then case folded.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The new limits will only apply to additions to this set. Existing</span> |
| <span class="doccomment">/// members remain unchanged, even if the set exceeds the new limit.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_limit_class</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">size</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span> { |
| <span class="self">self</span>.<span class="ident">limit_class</span> <span class="op">=</span> <span class="ident">size</span>; |
| <span class="self">self</span> |
| } |
| |
| <span class="doccomment">/// Returns the set of literals as a slice. Its order is unspecified.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">literals</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">Lit</span>] { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span> |
| } |
| |
| <span class="doccomment">/// Returns the length of the smallest literal.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Returns None is there are no literals in the set.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">min_len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">min</span> <span class="op">=</span> <span class="prelude-val">None</span>; |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span> { |
| <span class="kw">match</span> <span class="ident">min</span> { |
| <span class="prelude-val">None</span> <span class="op">=></span> <span class="ident">min</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">lit</span>.<span class="ident">len</span>()), |
| <span class="prelude-val">Some</span>(<span class="ident">m</span>) <span class="kw">if</span> <span class="ident">lit</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="ident">m</span> <span class="op">=></span> <span class="ident">min</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">lit</span>.<span class="ident">len</span>()), |
| _ <span class="op">=></span> {} |
| } |
| } |
| <span class="ident">min</span> |
| } |
| |
| <span class="doccomment">/// Returns true if all members in this set are complete.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">all_complete</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="op">!</span><span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="op">!</span><span class="ident">l</span>.<span class="ident">is_cut</span>()) |
| } |
| |
| <span class="doccomment">/// Returns true if any member in this set is complete.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">any_complete</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">any</span>(<span class="op">|</span><span class="ident">lit</span><span class="op">|</span> <span class="op">!</span><span class="ident">lit</span>.<span class="ident">is_cut</span>()) |
| } |
| |
| <span class="doccomment">/// Returns true if this set contains an empty literal.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">any</span>(<span class="op">|</span><span class="ident">lit</span><span class="op">|</span> <span class="ident">lit</span>.<span class="ident">is_empty</span>()) |
| } |
| |
| <span class="doccomment">/// Returns true if this set is empty or if all of its members is empty.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">lit</span><span class="op">|</span> <span class="ident">lit</span>.<span class="ident">is_empty</span>()) |
| } |
| |
| <span class="doccomment">/// Returns a new empty set of literals using this set's limits.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Literals</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">Literals</span>::<span class="ident">empty</span>(); |
| <span class="ident">lits</span>.<span class="ident">set_limit_size</span>(<span class="self">self</span>.<span class="ident">limit_size</span>) |
| .<span class="ident">set_limit_class</span>(<span class="self">self</span>.<span class="ident">limit_class</span>); |
| <span class="ident">lits</span> |
| } |
| |
| <span class="doccomment">/// Returns the longest common prefix of all members in this set.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">longest_common_prefix</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">return</span> <span class="kw-2">&</span>[]; |
| } |
| <span class="kw">let</span> <span class="ident">lit0</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>]; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">lit0</span>.<span class="ident">len</span>(); |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">1</span>..] { |
| <span class="ident">len</span> <span class="op">=</span> <span class="ident">cmp</span>::<span class="ident">min</span>( |
| <span class="ident">len</span>, |
| <span class="ident">lit</span>.<span class="ident">iter</span>() |
| .<span class="ident">zip</span>(<span class="ident">lit0</span>) |
| .<span class="ident">take_while</span>(<span class="op">|</span><span class="kw-2">&</span>(<span class="ident">a</span>, <span class="ident">b</span>)<span class="op">|</span> <span class="ident">a</span> <span class="op">==</span> <span class="ident">b</span>) |
| .<span class="ident">count</span>()); |
| } |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>][..<span class="ident">len</span>] |
| } |
| |
| <span class="doccomment">/// Returns the longest common suffix of all members in this set.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">longest_common_suffix</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">return</span> <span class="kw-2">&</span>[]; |
| } |
| <span class="kw">let</span> <span class="ident">lit0</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>]; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">lit0</span>.<span class="ident">len</span>(); |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">1</span>..] { |
| <span class="ident">len</span> <span class="op">=</span> <span class="ident">cmp</span>::<span class="ident">min</span>( |
| <span class="ident">len</span>, |
| <span class="ident">lit</span>.<span class="ident">iter</span>() |
| .<span class="ident">rev</span>() |
| .<span class="ident">zip</span>(<span class="ident">lit0</span>.<span class="ident">iter</span>().<span class="ident">rev</span>()) |
| .<span class="ident">take_while</span>(<span class="op">|</span><span class="kw-2">&</span>(<span class="ident">a</span>, <span class="ident">b</span>)<span class="op">|</span> <span class="ident">a</span> <span class="op">==</span> <span class="ident">b</span>) |
| .<span class="ident">count</span>()); |
| } |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>][<span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>].<span class="ident">len</span>() <span class="op">-</span> <span class="ident">len</span>..] |
| } |
| |
| <span class="doccomment">/// Returns a new set of literals with the given number of bytes trimmed</span> |
| <span class="doccomment">/// from the suffix of each literal.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If any literal would be cut out completely by trimming, then None is</span> |
| <span class="doccomment">/// returned.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Any duplicates that are created as a result of this transformation are</span> |
| <span class="doccomment">/// removed.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">trim_suffix</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">num_bytes</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Literals</span><span class="op">></span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">min_len</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">len</span><span class="op">|</span> <span class="ident">len</span> <span class="op"><=</span> <span class="ident">num_bytes</span>).<span class="ident">unwrap_or</span>(<span class="bool-val">true</span>) { |
| <span class="kw">return</span> <span class="prelude-val">None</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_empty</span>(); |
| <span class="kw">for</span> <span class="kw-2">mut</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>() { |
| <span class="kw">let</span> <span class="ident">new_len</span> <span class="op">=</span> <span class="ident">lit</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">num_bytes</span>; |
| <span class="ident">lit</span>.<span class="ident">truncate</span>(<span class="ident">new_len</span>); |
| <span class="ident">lit</span>.<span class="ident">cut</span>(); |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">lit</span>); |
| } |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">sort</span>(); |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">dedup</span>(); |
| <span class="prelude-val">Some</span>(<span class="ident">new</span>) |
| } |
| |
| <span class="doccomment">/// Returns a new set of prefixes of this set of literals that are</span> |
| <span class="doccomment">/// guaranteed to be unambiguous.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Any substring match with a member of the set is returned is guaranteed</span> |
| <span class="doccomment">/// to never overlap with a substring match of another member of the set</span> |
| <span class="doccomment">/// at the same starting position.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Given any two members of the returned set, neither is a substring of</span> |
| <span class="doccomment">/// the other.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unambiguous_prefixes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Literals</span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">return</span> <span class="self">self</span>.<span class="ident">to_empty</span>(); |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">old</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_empty</span>(); |
| <span class="lifetime">'OUTER</span>: |
| <span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">mut</span> <span class="ident">candidate</span>) <span class="op">=</span> <span class="ident">old</span>.<span class="ident">pop</span>() { |
| <span class="kw">if</span> <span class="ident">candidate</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">if</span> <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">candidate</span>); |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">for</span> <span class="ident">lit2</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">new</span>.<span class="ident">lits</span> { |
| <span class="kw">if</span> <span class="ident">lit2</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">if</span> <span class="kw-2">&</span><span class="ident">candidate</span> <span class="op">==</span> <span class="ident">lit2</span> { |
| <span class="comment">// If the literal is already in the set, then we can</span> |
| <span class="comment">// just drop it. But make sure that cut literals are</span> |
| <span class="comment">// infectious!</span> |
| <span class="ident">candidate</span>.<span class="ident">cut</span> <span class="op">=</span> <span class="ident">candidate</span>.<span class="ident">cut</span> <span class="op">||</span> <span class="ident">lit2</span>.<span class="ident">cut</span>; |
| <span class="ident">lit2</span>.<span class="ident">cut</span> <span class="op">=</span> <span class="ident">candidate</span>.<span class="ident">cut</span>; |
| <span class="kw">continue</span> <span class="lifetime">'OUTER</span>; |
| } |
| <span class="kw">if</span> <span class="ident">candidate</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="ident">lit2</span>.<span class="ident">len</span>() { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">i</span>) <span class="op">=</span> <span class="ident">position</span>(<span class="kw-2">&</span><span class="ident">candidate</span>, <span class="kw-2">&</span><span class="ident">lit2</span>) { |
| <span class="ident">candidate</span>.<span class="ident">cut</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lit3</span> <span class="op">=</span> <span class="ident">lit2</span>.<span class="ident">clone</span>(); |
| <span class="ident">lit3</span>.<span class="ident">truncate</span>(<span class="ident">i</span>); |
| <span class="ident">lit3</span>.<span class="ident">cut</span>(); |
| <span class="ident">old</span>.<span class="ident">push</span>(<span class="ident">lit3</span>); |
| <span class="ident">lit2</span>.<span class="ident">clear</span>(); |
| } |
| } <span class="kw">else</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">i</span>) <span class="op">=</span> <span class="ident">position</span>(<span class="kw-2">&</span><span class="ident">lit2</span>, <span class="kw-2">&</span><span class="ident">candidate</span>) { |
| <span class="ident">lit2</span>.<span class="ident">cut</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new_candidate</span> <span class="op">=</span> <span class="ident">candidate</span>.<span class="ident">clone</span>(); |
| <span class="ident">new_candidate</span>.<span class="ident">truncate</span>(<span class="ident">i</span>); |
| <span class="ident">new_candidate</span>.<span class="ident">cut</span>(); |
| <span class="ident">old</span>.<span class="ident">push</span>(<span class="ident">new_candidate</span>); |
| <span class="ident">candidate</span>.<span class="ident">clear</span>(); |
| } |
| } |
| <span class="comment">// Oops, the candidate is already represented in the set.</span> |
| <span class="kw">if</span> <span class="ident">candidate</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">continue</span> <span class="lifetime">'OUTER</span>; |
| } |
| } |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">candidate</span>); |
| } |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">retain</span>(<span class="op">|</span><span class="ident">lit</span><span class="op">|</span> <span class="op">!</span><span class="ident">lit</span>.<span class="ident">is_empty</span>()); |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">sort</span>(); |
| <span class="ident">new</span>.<span class="ident">lits</span>.<span class="ident">dedup</span>(); |
| <span class="ident">new</span> |
| } |
| |
| <span class="doccomment">/// Returns a new set of suffixes of this set of literals that are</span> |
| <span class="doccomment">/// guaranteed to be unambiguous.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Any substring match with a member of the set is returned is guaranteed</span> |
| <span class="doccomment">/// to never overlap with a substring match of another member of the set</span> |
| <span class="doccomment">/// at the same ending position.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Given any two members of the returned set, neither is a substring of</span> |
| <span class="doccomment">/// the other.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unambiguous_suffixes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Literals</span> { |
| <span class="comment">// This is a touch wasteful...</span> |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">clone</span>(); |
| <span class="ident">lits</span>.<span class="ident">reverse</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">unamb</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">unambiguous_prefixes</span>(); |
| <span class="ident">unamb</span>.<span class="ident">reverse</span>(); |
| <span class="ident">unamb</span> |
| } |
| |
| <span class="doccomment">/// Unions the prefixes from the given expression to this set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If prefixes could not be added (for example, this set would exceed its</span> |
| <span class="doccomment">/// size limits or the set of prefixes from `expr` includes the empty</span> |
| <span class="doccomment">/// string), then false is returned.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Note that prefix literals extracted from `expr` are said to be complete</span> |
| <span class="doccomment">/// if and only if the literal extends from the beginning of `expr` to the</span> |
| <span class="doccomment">/// end of `expr`.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">union_prefixes</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_empty</span>(); |
| <span class="ident">prefixes</span>(<span class="ident">expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits</span>); |
| <span class="op">!</span><span class="ident">lits</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">contains_empty</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">union</span>(<span class="ident">lits</span>) |
| } |
| |
| <span class="doccomment">/// Unions the suffixes from the given expression to this set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If suffixes could not be added (for example, this set would exceed its</span> |
| <span class="doccomment">/// size limits or the set of suffixes from `expr` includes the empty</span> |
| <span class="doccomment">/// string), then false is returned.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Note that prefix literals extracted from `expr` are said to be complete</span> |
| <span class="doccomment">/// if and only if the literal extends from the end of `expr` to the</span> |
| <span class="doccomment">/// beginning of `expr`.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">union_suffixes</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_empty</span>(); |
| <span class="ident">suffixes</span>(<span class="ident">expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits</span>); |
| <span class="ident">lits</span>.<span class="ident">reverse</span>(); |
| <span class="op">!</span><span class="ident">lits</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">contains_empty</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">union</span>(<span class="ident">lits</span>) |
| } |
| |
| <span class="doccomment">/// Unions this set with another set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If the union would cause the set to exceed its limits, then the union</span> |
| <span class="doccomment">/// is skipped and it returns false. Otherwise, if the union succeeds, it</span> |
| <span class="doccomment">/// returns true.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">union</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">lits</span>: <span class="ident">Literals</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">num_bytes</span>() <span class="op">+</span> <span class="ident">lits</span>.<span class="ident">num_bytes</span>() <span class="op">></span> <span class="self">self</span>.<span class="ident">limit_size</span> { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| <span class="kw">if</span> <span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">Lit</span>::<span class="ident">empty</span>()); |
| } <span class="kw">else</span> { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">extend</span>(<span class="ident">lits</span>.<span class="ident">lits</span>); |
| } |
| <span class="bool-val">true</span> |
| } |
| |
| <span class="doccomment">/// Extends this set with another set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The set of literals is extended via a cross product.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If a cross product would cause this set to exceed its limits, then the</span> |
| <span class="doccomment">/// cross product is skipped and it returns false. Otherwise, if the cross</span> |
| <span class="doccomment">/// product succeeds, it returns true.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cross_product</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">lits</span>: <span class="kw-2">&</span><span class="ident">Literals</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">return</span> <span class="bool-val">true</span>; |
| } |
| <span class="comment">// Check that we make sure we stay in our limits.</span> |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">size_after</span>; |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">any_complete</span>() { |
| <span class="ident">size_after</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">num_bytes</span>(); |
| <span class="kw">for</span> <span class="ident">lits_lit</span> <span class="kw">in</span> <span class="ident">lits</span>.<span class="ident">literals</span>() { |
| <span class="ident">size_after</span> <span class="op">+=</span> <span class="ident">lits_lit</span>.<span class="ident">len</span>(); |
| } |
| } <span class="kw">else</span> { |
| <span class="ident">size_after</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">accum</span>, <span class="ident">lit</span><span class="op">|</span> { |
| <span class="ident">accum</span> <span class="op">+</span> <span class="kw">if</span> <span class="ident">lit</span>.<span class="ident">is_cut</span>() { <span class="ident">lit</span>.<span class="ident">len</span>() } <span class="kw">else</span> { <span class="number">0</span> } |
| }); |
| <span class="kw">for</span> <span class="ident">lits_lit</span> <span class="kw">in</span> <span class="ident">lits</span>.<span class="ident">literals</span>() { |
| <span class="kw">for</span> <span class="ident">self_lit</span> <span class="kw">in</span> <span class="self">self</span>.<span class="ident">literals</span>() { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">self_lit</span>.<span class="ident">is_cut</span>() { |
| <span class="ident">size_after</span> <span class="op">+=</span> <span class="ident">self_lit</span>.<span class="ident">len</span>() <span class="op">+</span> <span class="ident">lits_lit</span>.<span class="ident">len</span>(); |
| } |
| } |
| } |
| } |
| <span class="kw">if</span> <span class="ident">size_after</span> <span class="op">></span> <span class="self">self</span>.<span class="ident">limit_size</span> { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">base</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">remove_complete</span>(); |
| <span class="kw">if</span> <span class="ident">base</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">base</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Lit</span>::<span class="ident">empty</span>()]; |
| } |
| <span class="kw">for</span> <span class="ident">lits_lit</span> <span class="kw">in</span> <span class="ident">lits</span>.<span class="ident">literals</span>() { |
| <span class="kw">for</span> <span class="kw-2">mut</span> <span class="ident">self_lit</span> <span class="kw">in</span> <span class="ident">base</span>.<span class="ident">clone</span>() { |
| <span class="ident">self_lit</span>.<span class="ident">extend</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">lits_lit</span>); |
| <span class="ident">self_lit</span>.<span class="ident">cut</span> <span class="op">=</span> <span class="ident">lits_lit</span>.<span class="ident">cut</span>; |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">self_lit</span>); |
| } |
| } |
| <span class="bool-val">true</span> |
| } |
| |
| <span class="doccomment">/// Extends each literal in this set with the bytes given.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If the set is empty, then the given literal is added to the set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// If adding any number of bytes to all members of this set causes a limit</span> |
| <span class="doccomment">/// to be exceeded, then no bytes are added and false is returned. If a</span> |
| <span class="doccomment">/// prefix of `bytes` can be fit into this set, then it is used and all</span> |
| <span class="doccomment">/// resulting literals are cut.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cross_add</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">bytes</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="comment">// N.B. This could be implemented by simply calling cross_product with</span> |
| <span class="comment">// a literal set containing just `bytes`, but we can be smarter about</span> |
| <span class="comment">// taking shorter prefixes of `bytes` if they'll fit.</span> |
| <span class="kw">if</span> <span class="ident">bytes</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">return</span> <span class="bool-val">true</span>; |
| } |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="kw">let</span> <span class="ident">i</span> <span class="op">=</span> <span class="ident">cmp</span>::<span class="ident">min</span>(<span class="self">self</span>.<span class="ident">limit_size</span>, <span class="ident">bytes</span>.<span class="ident">len</span>()); |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">Lit</span>::<span class="ident">new</span>(<span class="ident">bytes</span>[..<span class="ident">i</span>].<span class="ident">to_owned</span>())); |
| <span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>].<span class="ident">cut</span> <span class="op">=</span> <span class="ident">i</span> <span class="op"><</span> <span class="ident">bytes</span>.<span class="ident">len</span>(); |
| <span class="kw">return</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">lits</span>[<span class="number">0</span>].<span class="ident">is_cut</span>(); |
| } |
| <span class="kw">let</span> <span class="ident">size</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">num_bytes</span>(); |
| <span class="kw">if</span> <span class="ident">size</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">len</span>() <span class="op">>=</span> <span class="self">self</span>.<span class="ident">limit_size</span> { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">i</span> <span class="op">=</span> <span class="number">1</span>; |
| <span class="kw">while</span> <span class="ident">size</span> <span class="op">+</span> (<span class="ident">i</span> <span class="op">*</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">len</span>()) <span class="op"><=</span> <span class="self">self</span>.<span class="ident">limit_size</span> |
| <span class="op">&&</span> <span class="ident">i</span> <span class="op"><</span> <span class="ident">bytes</span>.<span class="ident">len</span>() { |
| <span class="ident">i</span> <span class="op">+=</span> <span class="number">1</span>; |
| } |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">lits</span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lit</span>.<span class="ident">is_cut</span>() { |
| <span class="ident">lit</span>.<span class="ident">extend</span>(<span class="kw-2">&</span><span class="ident">bytes</span>[..<span class="ident">i</span>]); |
| <span class="kw">if</span> <span class="ident">i</span> <span class="op"><</span> <span class="ident">bytes</span>.<span class="ident">len</span>() { |
| <span class="ident">lit</span>.<span class="ident">cut</span>(); |
| } |
| } |
| } |
| <span class="bool-val">true</span> |
| } |
| |
| <span class="doccomment">/// Adds the given literal to this set.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Returns false if adding this literal would cause the class to be too</span> |
| <span class="doccomment">/// big.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">add</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">lit</span>: <span class="ident">Lit</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">num_bytes</span>() <span class="op">+</span> <span class="ident">lit</span>.<span class="ident">len</span>() <span class="op">></span> <span class="self">self</span>.<span class="ident">limit_size</span> { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">lit</span>); |
| <span class="bool-val">true</span> |
| } |
| |
| <span class="doccomment">/// Extends each literal in this set with the character class given.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Returns false if the character class was too big to add.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">add_char_class</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">cls</span>: <span class="kw-2">&</span><span class="ident">CharClass</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">_add_char_class</span>(<span class="ident">cls</span>, <span class="bool-val">false</span>) |
| } |
| |
| <span class="doccomment">/// Extends each literal in this set with the character class given,</span> |
| <span class="doccomment">/// writing the bytes of each character in reverse.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Returns false if the character class was too big to add.</span> |
| <span class="kw">fn</span> <span class="ident">add_char_class_reverse</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">cls</span>: <span class="kw-2">&</span><span class="ident">CharClass</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">_add_char_class</span>(<span class="ident">cls</span>, <span class="bool-val">true</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">_add_char_class</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">cls</span>: <span class="kw-2">&</span><span class="ident">CharClass</span>, <span class="ident">reverse</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">char</span>; |
| |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">class_exceeds_limits</span>(<span class="ident">cls</span>.<span class="ident">num_chars</span>()) { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">base</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">remove_complete</span>(); |
| <span class="kw">if</span> <span class="ident">base</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">base</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Lit</span>::<span class="ident">empty</span>()]; |
| } |
| <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">cls</span> { |
| <span class="kw">let</span> (<span class="ident">s</span>, <span class="ident">e</span>) <span class="op">=</span> (<span class="ident">r</span>.<span class="ident">start</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="ident">r</span>.<span class="ident">end</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op">+</span> <span class="number">1</span>); |
| <span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> (<span class="ident">s</span>..<span class="ident">e</span>).<span class="ident">filter_map</span>(<span class="ident">char</span>::<span class="ident">from_u32</span>) { |
| <span class="kw">for</span> <span class="kw-2">mut</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="ident">base</span>.<span class="ident">clone</span>() { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">c</span>.<span class="ident">to_string</span>().<span class="ident">into_bytes</span>(); |
| <span class="kw">if</span> <span class="ident">reverse</span> { |
| <span class="ident">bytes</span>.<span class="ident">reverse</span>(); |
| } |
| <span class="ident">lit</span>.<span class="ident">extend</span>(<span class="kw-2">&</span><span class="ident">bytes</span>); |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">lit</span>); |
| } |
| } |
| } |
| <span class="bool-val">true</span> |
| } |
| |
| <span class="doccomment">/// Extends each literal in this set with the byte class given.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Returns false if the byte class was too big to add.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">add_byte_class</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">cls</span>: <span class="kw-2">&</span><span class="ident">ByteClass</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">class_exceeds_limits</span>(<span class="ident">cls</span>.<span class="ident">num_bytes</span>()) { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">base</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">remove_complete</span>(); |
| <span class="kw">if</span> <span class="ident">base</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">base</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Lit</span>::<span class="ident">empty</span>()]; |
| } |
| <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">cls</span> { |
| <span class="kw">let</span> (<span class="ident">s</span>, <span class="ident">e</span>) <span class="op">=</span> (<span class="ident">r</span>.<span class="ident">start</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="ident">r</span>.<span class="ident">end</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op">+</span> <span class="number">1</span>); |
| <span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> (<span class="ident">s</span>..<span class="ident">e</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span> <span class="kw">as</span> <span class="ident">u8</span>) { |
| <span class="kw">for</span> <span class="kw-2">mut</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="ident">base</span>.<span class="ident">clone</span>() { |
| <span class="ident">lit</span>.<span class="ident">push</span>(<span class="ident">b</span>); |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">lit</span>); |
| } |
| } |
| } |
| <span class="bool-val">true</span> |
| } |
| |
| <span class="doccomment">/// Cuts every member of this set. When a member is cut, it can never</span> |
| <span class="doccomment">/// be extended.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">lits</span> { |
| <span class="ident">lit</span>.<span class="ident">cut</span>(); |
| } |
| } |
| |
| <span class="doccomment">/// Reverses all members in place.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">reverse</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">lits</span> { |
| <span class="ident">lit</span>.<span class="ident">reverse</span>(); |
| } |
| } |
| |
| <span class="doccomment">/// Clears this set of all members.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clear</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">clear</span>(); |
| } |
| |
| <span class="doccomment">/// Pops all complete literals out of this set.</span> |
| <span class="kw">fn</span> <span class="ident">remove_complete</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">base</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[]; |
| <span class="kw">for</span> <span class="ident">lit</span> <span class="kw">in</span> <span class="ident">mem</span>::<span class="ident">replace</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">lits</span>, <span class="macro">vec</span><span class="macro">!</span>[]) { |
| <span class="kw">if</span> <span class="ident">lit</span>.<span class="ident">is_cut</span>() { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">push</span>(<span class="ident">lit</span>); |
| } <span class="kw">else</span> { |
| <span class="ident">base</span>.<span class="ident">push</span>(<span class="ident">lit</span>); |
| } |
| } |
| <span class="ident">base</span> |
| } |
| |
| <span class="doccomment">/// Returns the total number of bytes in this set.</span> |
| <span class="kw">fn</span> <span class="ident">num_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">iter</span>().<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">accum</span>, <span class="ident">lit</span><span class="op">|</span> <span class="ident">accum</span> <span class="op">+</span> <span class="ident">lit</span>.<span class="ident">len</span>()) |
| } |
| |
| <span class="doccomment">/// Returns true if a character class with the given size would cause this</span> |
| <span class="doccomment">/// set to exceed its limits.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The size given should correspond to the number of items in the class.</span> |
| <span class="kw">fn</span> <span class="ident">class_exceeds_limits</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">size</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="ident">size</span> <span class="op">></span> <span class="self">self</span>.<span class="ident">limit_class</span> { |
| <span class="kw">return</span> <span class="bool-val">true</span>; |
| } |
| <span class="comment">// This is an approximation since codepoints in a char class can encode</span> |
| <span class="comment">// to 1-4 bytes.</span> |
| <span class="kw">let</span> <span class="ident">new_byte_count</span> <span class="op">=</span> |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">size</span> |
| } <span class="kw">else</span> { |
| <span class="self">self</span>.<span class="ident">lits</span> |
| .<span class="ident">iter</span>() |
| .<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">accum</span>, <span class="ident">lit</span><span class="op">|</span> { |
| <span class="ident">accum</span> <span class="op">+</span> <span class="kw">if</span> <span class="ident">lit</span>.<span class="ident">is_cut</span>() { |
| <span class="comment">// If the literal is cut, then we'll never add</span> |
| <span class="comment">// anything to it, so don't count it.</span> |
| <span class="number">0</span> |
| } <span class="kw">else</span> { |
| (<span class="ident">lit</span>.<span class="ident">len</span>() <span class="op">+</span> <span class="number">1</span>) <span class="op">*</span> <span class="ident">size</span> |
| } |
| }) |
| }; |
| <span class="ident">new_byte_count</span> <span class="op">></span> <span class="self">self</span>.<span class="ident">limit_size</span> |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">prefixes</span>(<span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>, <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>) { |
| <span class="kw">use</span> <span class="ident">Expr</span>::<span class="kw-2">*</span>; |
| <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">expr</span> { |
| <span class="ident">Literal</span> { <span class="kw-2">ref</span> <span class="ident">chars</span>, <span class="ident">casei</span>: <span class="bool-val">false</span> } <span class="op">=></span> { |
| <span class="kw">let</span> <span class="ident">s</span>: <span class="ident">String</span> <span class="op">=</span> <span class="ident">chars</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>(); |
| <span class="ident">lits</span>.<span class="ident">cross_add</span>(<span class="ident">s</span>.<span class="ident">as_bytes</span>()); |
| } |
| <span class="ident">Literal</span> { <span class="kw-2">ref</span> <span class="ident">chars</span>, <span class="ident">casei</span>: <span class="bool-val">true</span> } <span class="op">=></span> { |
| <span class="kw">for</span> <span class="kw-2">&</span><span class="ident">c</span> <span class="kw">in</span> <span class="ident">chars</span> { |
| <span class="kw">let</span> <span class="ident">cls</span> <span class="op">=</span> <span class="ident">CharClass</span>::<span class="ident">new</span>(<span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">ClassRange</span> { <span class="ident">start</span>: <span class="ident">c</span>, <span class="ident">end</span>: <span class="ident">c</span> }, |
| ]).<span class="ident">case_fold</span>(); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_char_class</span>(<span class="kw-2">&</span><span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| } |
| } |
| <span class="ident">LiteralBytes</span> { <span class="kw-2">ref</span> <span class="ident">bytes</span>, <span class="ident">casei</span>: <span class="bool-val">false</span> } <span class="op">=></span> { |
| <span class="ident">lits</span>.<span class="ident">cross_add</span>(<span class="ident">bytes</span>); |
| } |
| <span class="ident">LiteralBytes</span> { <span class="kw-2">ref</span> <span class="ident">bytes</span>, <span class="ident">casei</span>: <span class="bool-val">true</span> } <span class="op">=></span> { |
| <span class="kw">for</span> <span class="kw-2">&</span><span class="ident">b</span> <span class="kw">in</span> <span class="ident">bytes</span> { |
| <span class="kw">let</span> <span class="ident">cls</span> <span class="op">=</span> <span class="ident">ByteClass</span>::<span class="ident">new</span>(<span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">ByteRange</span> { <span class="ident">start</span>: <span class="ident">b</span>, <span class="ident">end</span>: <span class="ident">b</span> }, |
| ]).<span class="ident">case_fold</span>(); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_byte_class</span>(<span class="kw-2">&</span><span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| } |
| } |
| <span class="ident">Class</span>(<span class="kw-2">ref</span> <span class="ident">cls</span>) <span class="op">=></span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_char_class</span>(<span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| <span class="ident">ClassBytes</span>(<span class="kw-2">ref</span> <span class="ident">cls</span>) <span class="op">=></span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_byte_class</span>(<span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| <span class="ident">Group</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, .. } <span class="op">=></span> { |
| <span class="ident">prefixes</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">ZeroOrOne</span>, .. } <span class="op">=></span> { |
| <span class="ident">repeat_zero_or_one_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>, <span class="ident">prefixes</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">ZeroOrMore</span>, .. } <span class="op">=></span> { |
| <span class="ident">repeat_zero_or_more_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>, <span class="ident">prefixes</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">OneOrMore</span>, .. } <span class="op">=></span> { |
| <span class="ident">repeat_one_or_more_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>, <span class="ident">prefixes</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">Range</span> { <span class="ident">min</span>, <span class="ident">max</span> }, <span class="ident">greedy</span> } <span class="op">=></span> { |
| <span class="ident">repeat_range_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">min</span>, <span class="ident">max</span>, <span class="ident">greedy</span>, <span class="ident">lits</span>, <span class="ident">prefixes</span>); |
| } |
| <span class="ident">Concat</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="kw">if</span> <span class="ident">es</span>.<span class="ident">is_empty</span>() <span class="op">=></span> {} |
| <span class="ident">Concat</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="kw">if</span> <span class="ident">es</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span> <span class="op">=></span> <span class="ident">prefixes</span>(<span class="kw-2">&</span><span class="ident">es</span>[<span class="number">0</span>], <span class="ident">lits</span>), |
| <span class="ident">Concat</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="op">=></span> { |
| <span class="kw">for</span> <span class="ident">e</span> <span class="kw">in</span> <span class="ident">es</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">StartText</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">e</span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">break</span>; |
| } |
| <span class="ident">lits</span>.<span class="ident">add</span>(<span class="ident">Lit</span>::<span class="ident">empty</span>()); |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits2</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">to_empty</span>(); |
| <span class="ident">prefixes</span>(<span class="ident">e</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits2</span>); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">cross_product</span>(<span class="kw-2">&</span><span class="ident">lits2</span>) <span class="op">||</span> <span class="op">!</span><span class="ident">lits2</span>.<span class="ident">any_complete</span>() { |
| <span class="comment">// If this expression couldn't yield any literal that</span> |
| <span class="comment">// could be extended, then we need to quit. Since we're</span> |
| <span class="comment">// short-circuiting, we also need to freeze every member.</span> |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| <span class="ident">Alternate</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="op">=></span> { |
| <span class="ident">alternate_literals</span>(<span class="ident">es</span>, <span class="ident">lits</span>, <span class="ident">prefixes</span>); |
| } |
| _ <span class="op">=></span> <span class="ident">lits</span>.<span class="ident">cut</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">suffixes</span>(<span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>, <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>) { |
| <span class="kw">use</span> <span class="ident">Expr</span>::<span class="kw-2">*</span>; |
| <span class="kw">match</span> <span class="kw-2">*</span><span class="ident">expr</span> { |
| <span class="ident">Literal</span> { <span class="kw-2">ref</span> <span class="ident">chars</span>, <span class="ident">casei</span>: <span class="bool-val">false</span> } <span class="op">=></span> { |
| <span class="kw">let</span> <span class="ident">s</span>: <span class="ident">String</span> <span class="op">=</span> <span class="ident">chars</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">into_bytes</span>(); |
| <span class="ident">bytes</span>.<span class="ident">reverse</span>(); |
| <span class="ident">lits</span>.<span class="ident">cross_add</span>(<span class="kw-2">&</span><span class="ident">bytes</span>); |
| } |
| <span class="ident">Literal</span> { <span class="kw-2">ref</span> <span class="ident">chars</span>, <span class="ident">casei</span>: <span class="bool-val">true</span> } <span class="op">=></span> { |
| <span class="kw">for</span> <span class="kw-2">&</span><span class="ident">c</span> <span class="kw">in</span> <span class="ident">chars</span>.<span class="ident">iter</span>().<span class="ident">rev</span>() { |
| <span class="kw">let</span> <span class="ident">cls</span> <span class="op">=</span> <span class="ident">CharClass</span>::<span class="ident">new</span>(<span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">ClassRange</span> { <span class="ident">start</span>: <span class="ident">c</span>, <span class="ident">end</span>: <span class="ident">c</span> }, |
| ]).<span class="ident">case_fold</span>(); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_char_class_reverse</span>(<span class="kw-2">&</span><span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| } |
| } |
| <span class="ident">LiteralBytes</span> { <span class="kw-2">ref</span> <span class="ident">bytes</span>, <span class="ident">casei</span>: <span class="bool-val">false</span> } <span class="op">=></span> { |
| <span class="kw">let</span> <span class="ident">b</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">bytes</span>.<span class="ident">iter</span>().<span class="ident">rev</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>(); |
| <span class="ident">lits</span>.<span class="ident">cross_add</span>(<span class="kw-2">&</span><span class="ident">b</span>); |
| } |
| <span class="ident">LiteralBytes</span> { <span class="kw-2">ref</span> <span class="ident">bytes</span>, <span class="ident">casei</span>: <span class="bool-val">true</span> } <span class="op">=></span> { |
| <span class="kw">for</span> <span class="kw-2">&</span><span class="ident">b</span> <span class="kw">in</span> <span class="ident">bytes</span>.<span class="ident">iter</span>().<span class="ident">rev</span>() { |
| <span class="kw">let</span> <span class="ident">cls</span> <span class="op">=</span> <span class="ident">ByteClass</span>::<span class="ident">new</span>(<span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">ByteRange</span> { <span class="ident">start</span>: <span class="ident">b</span>, <span class="ident">end</span>: <span class="ident">b</span> }, |
| ]).<span class="ident">case_fold</span>(); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_byte_class</span>(<span class="kw-2">&</span><span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| } |
| } |
| <span class="ident">Class</span>(<span class="kw-2">ref</span> <span class="ident">cls</span>) <span class="op">=></span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_char_class_reverse</span>(<span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| <span class="ident">ClassBytes</span>(<span class="kw-2">ref</span> <span class="ident">cls</span>) <span class="op">=></span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">add_byte_class</span>(<span class="ident">cls</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| <span class="ident">Group</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, .. } <span class="op">=></span> { |
| <span class="ident">suffixes</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">ZeroOrOne</span>, .. } <span class="op">=></span> { |
| <span class="ident">repeat_zero_or_one_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>, <span class="ident">suffixes</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">ZeroOrMore</span>, .. } <span class="op">=></span> { |
| <span class="ident">repeat_zero_or_more_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>, <span class="ident">suffixes</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">OneOrMore</span>, .. } <span class="op">=></span> { |
| <span class="ident">repeat_one_or_more_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">lits</span>, <span class="ident">suffixes</span>); |
| } |
| <span class="ident">Repeat</span> { <span class="kw-2">ref</span> <span class="ident">e</span>, <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">Range</span> { <span class="ident">min</span>, <span class="ident">max</span> }, <span class="ident">greedy</span> } <span class="op">=></span> { |
| <span class="ident">repeat_range_literals</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">e</span>, <span class="ident">min</span>, <span class="ident">max</span>, <span class="ident">greedy</span>, <span class="ident">lits</span>, <span class="ident">suffixes</span>); |
| } |
| <span class="ident">Concat</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="kw">if</span> <span class="ident">es</span>.<span class="ident">is_empty</span>() <span class="op">=></span> {} |
| <span class="ident">Concat</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="kw">if</span> <span class="ident">es</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span> <span class="op">=></span> <span class="ident">suffixes</span>(<span class="kw-2">&</span><span class="ident">es</span>[<span class="number">0</span>], <span class="ident">lits</span>), |
| <span class="ident">Concat</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="op">=></span> { |
| <span class="kw">for</span> <span class="ident">e</span> <span class="kw">in</span> <span class="ident">es</span>.<span class="ident">iter</span>().<span class="ident">rev</span>() { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">EndText</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">e</span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">break</span>; |
| } |
| <span class="ident">lits</span>.<span class="ident">add</span>(<span class="ident">Lit</span>::<span class="ident">empty</span>()); |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits2</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">to_empty</span>(); |
| <span class="ident">suffixes</span>(<span class="ident">e</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits2</span>); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">cross_product</span>(<span class="kw-2">&</span><span class="ident">lits2</span>) <span class="op">||</span> <span class="op">!</span><span class="ident">lits2</span>.<span class="ident">any_complete</span>() { |
| <span class="comment">// If this expression couldn't yield any literal that</span> |
| <span class="comment">// could be extended, then we need to quit. Since we're</span> |
| <span class="comment">// short-circuiting, we also need to freeze every member.</span> |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| <span class="ident">Alternate</span>(<span class="kw-2">ref</span> <span class="ident">es</span>) <span class="op">=></span> { |
| <span class="ident">alternate_literals</span>(<span class="ident">es</span>, <span class="ident">lits</span>, <span class="ident">suffixes</span>); |
| } |
| _ <span class="op">=></span> <span class="ident">lits</span>.<span class="ident">cut</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">repeat_zero_or_one_literals</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>)<span class="op">></span>( |
| <span class="ident">e</span>: <span class="kw-2">&</span><span class="ident">Expr</span>, |
| <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, |
| <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>, |
| ) { |
| <span class="kw">let</span> (<span class="kw-2">mut</span> <span class="ident">lits2</span>, <span class="kw-2">mut</span> <span class="ident">lits3</span>) <span class="op">=</span> (<span class="ident">lits</span>.<span class="ident">clone</span>(), <span class="ident">lits</span>.<span class="ident">to_empty</span>()); |
| <span class="ident">lits3</span>.<span class="ident">set_limit_size</span>(<span class="ident">lits</span>.<span class="ident">limit_size</span>() <span class="op">/</span> <span class="number">2</span>); |
| <span class="ident">f</span>(<span class="ident">e</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits3</span>); |
| |
| <span class="kw">if</span> <span class="ident">lits3</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="op">!</span><span class="ident">lits2</span>.<span class="ident">cross_product</span>(<span class="kw-2">&</span><span class="ident">lits3</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| <span class="ident">lits2</span>.<span class="ident">add</span>(<span class="ident">Lit</span>::<span class="ident">empty</span>()); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">union</span>(<span class="ident">lits2</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">repeat_zero_or_more_literals</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>)<span class="op">></span>( |
| <span class="ident">e</span>: <span class="kw-2">&</span><span class="ident">Expr</span>, |
| <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, |
| <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>, |
| ) { |
| <span class="kw">let</span> (<span class="kw-2">mut</span> <span class="ident">lits2</span>, <span class="kw-2">mut</span> <span class="ident">lits3</span>) <span class="op">=</span> (<span class="ident">lits</span>.<span class="ident">clone</span>(), <span class="ident">lits</span>.<span class="ident">to_empty</span>()); |
| <span class="ident">lits3</span>.<span class="ident">set_limit_size</span>(<span class="ident">lits</span>.<span class="ident">limit_size</span>() <span class="op">/</span> <span class="number">2</span>); |
| <span class="ident">f</span>(<span class="ident">e</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits3</span>); |
| |
| <span class="kw">if</span> <span class="ident">lits3</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="op">!</span><span class="ident">lits2</span>.<span class="ident">cross_product</span>(<span class="kw-2">&</span><span class="ident">lits3</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| <span class="ident">lits2</span>.<span class="ident">cut</span>(); |
| <span class="ident">lits2</span>.<span class="ident">add</span>(<span class="ident">Lit</span>::<span class="ident">empty</span>()); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">union</span>(<span class="ident">lits2</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">repeat_one_or_more_literals</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>)<span class="op">></span>( |
| <span class="ident">e</span>: <span class="kw-2">&</span><span class="ident">Expr</span>, |
| <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, |
| <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>, |
| ) { |
| <span class="ident">f</span>(<span class="ident">e</span>, <span class="ident">lits</span>); |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| |
| <span class="kw">fn</span> <span class="ident">repeat_range_literals</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>)<span class="op">></span>( |
| <span class="ident">e</span>: <span class="kw-2">&</span><span class="ident">Expr</span>, |
| <span class="ident">min</span>: <span class="ident">u32</span>, |
| <span class="ident">max</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span>, |
| <span class="ident">greedy</span>: <span class="ident">bool</span>, |
| <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, |
| <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>, |
| ) { |
| <span class="kw">use</span> <span class="ident">Expr</span>::<span class="kw-2">*</span>; |
| |
| <span class="kw">if</span> <span class="ident">min</span> <span class="op">==</span> <span class="number">0</span> { |
| <span class="comment">// This is a bit conservative. If `max` is set, then we could</span> |
| <span class="comment">// treat this as a finite set of alternations. For now, we</span> |
| <span class="comment">// just treat it as `e*`.</span> |
| <span class="ident">f</span>(<span class="kw-2">&</span><span class="ident">Repeat</span> { |
| <span class="ident">e</span>: <span class="ident">Box</span>::<span class="ident">new</span>(<span class="ident">e</span>.<span class="ident">clone</span>()), |
| <span class="ident">r</span>: <span class="ident">Repeater</span>::<span class="ident">ZeroOrMore</span>, |
| <span class="ident">greedy</span>: <span class="ident">greedy</span>, |
| }, <span class="ident">lits</span>); |
| } <span class="kw">else</span> { |
| <span class="kw">if</span> <span class="ident">min</span> <span class="op">></span> <span class="number">0</span> { |
| <span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">cmp</span>::<span class="ident">min</span>(<span class="ident">lits</span>.<span class="ident">limit_size</span>, <span class="ident">min</span> <span class="kw">as</span> <span class="ident">usize</span>); |
| <span class="kw">let</span> <span class="ident">es</span> <span class="op">=</span> <span class="ident">iter</span>::<span class="ident">repeat</span>(<span class="ident">e</span>.<span class="ident">clone</span>()).<span class="ident">take</span>(<span class="ident">n</span>).<span class="ident">collect</span>(); |
| <span class="ident">f</span>(<span class="kw-2">&</span><span class="ident">Concat</span>(<span class="ident">es</span>), <span class="ident">lits</span>); |
| <span class="kw">if</span> <span class="ident">n</span> <span class="op"><</span> <span class="ident">min</span> <span class="kw">as</span> <span class="ident">usize</span> { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| <span class="kw">if</span> <span class="ident">max</span>.<span class="ident">map_or</span>(<span class="bool-val">true</span>, <span class="op">|</span><span class="ident">max</span><span class="op">|</span> <span class="ident">min</span> <span class="op"><</span> <span class="ident">max</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">alternate_literals</span><span class="op"><</span><span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Expr</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>)<span class="op">></span>( |
| <span class="ident">es</span>: <span class="kw-2">&</span>[<span class="ident">Expr</span>], |
| <span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, |
| <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>, |
| ) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits2</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">to_empty</span>(); |
| <span class="kw">for</span> <span class="ident">e</span> <span class="kw">in</span> <span class="ident">es</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits3</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">to_empty</span>(); |
| <span class="ident">lits3</span>.<span class="ident">set_limit_size</span>(<span class="ident">lits</span>.<span class="ident">limit_size</span>() <span class="op">/</span> <span class="number">5</span>); |
| <span class="ident">f</span>(<span class="ident">e</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits3</span>); |
| <span class="kw">if</span> <span class="ident">lits3</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="op">!</span><span class="ident">lits2</span>.<span class="ident">union</span>(<span class="ident">lits3</span>) { |
| <span class="comment">// If we couldn't find suffixes for *any* of the</span> |
| <span class="comment">// alternates, then the entire alternation has to be thrown</span> |
| <span class="comment">// away and any existing members must be frozen. Similarly,</span> |
| <span class="comment">// if the union couldn't complete, stop and freeze.</span> |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| <span class="kw">return</span>; |
| } |
| } |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">lits</span>.<span class="ident">cross_product</span>(<span class="kw-2">&</span><span class="ident">lits2</span>) { |
| <span class="ident">lits</span>.<span class="ident">cut</span>(); |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Literals</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="ident">f</span>.<span class="ident">debug_struct</span>(<span class="string">"Literals"</span>) |
| .<span class="ident">field</span>(<span class="string">"lits"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">lits</span>) |
| .<span class="ident">field</span>(<span class="string">"limit_size"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">limit_size</span>) |
| .<span class="ident">field</span>(<span class="string">"limit_class"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">limit_class</span>) |
| .<span class="ident">finish</span>() |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Lit</span> { |
| <span class="doccomment">/// Returns a new complete literal with the bytes given.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">bytes</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Lit</span> { |
| <span class="ident">Lit</span> { <span class="ident">v</span>: <span class="ident">bytes</span>, <span class="ident">cut</span>: <span class="bool-val">false</span> } |
| } |
| |
| <span class="doccomment">/// Returns a new complete empty literal.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">empty</span>() <span class="op">-></span> <span class="ident">Lit</span> { |
| <span class="ident">Lit</span> { <span class="ident">v</span>: <span class="macro">vec</span><span class="macro">!</span>[], <span class="ident">cut</span>: <span class="bool-val">false</span> } |
| } |
| |
| <span class="doccomment">/// Returns true if this literal was "cut."</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_cut</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">cut</span> |
| } |
| |
| <span class="doccomment">/// Cuts this literal.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { |
| <span class="self">self</span>.<span class="ident">cut</span> <span class="op">=</span> <span class="bool-val">true</span>; |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Lit</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">v</span> <span class="op">==</span> <span class="ident">other</span>.<span class="ident">v</span> |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">PartialOrd</span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">fn</span> <span class="ident">partial_cmp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Lit</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">cmp</span>::<span class="ident">Ordering</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">partial_cmp</span>(<span class="kw-2">&</span><span class="ident">other</span>.<span class="ident">v</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_cut</span>() { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Cut({})"</span>, <span class="ident">escape_unicode</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">v</span>)) |
| } <span class="kw">else</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Complete({})"</span>, <span class="ident">escape_unicode</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">v</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">fn</span> <span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">v</span> } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">ops</span>::<span class="ident">Deref</span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">type</span> <span class="ident">Target</span> <span class="op">=</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>; |
| <span class="kw">fn</span> <span class="ident">deref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> { <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">v</span> } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">ops</span>::<span class="ident">DerefMut</span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">fn</span> <span class="ident">deref_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> { <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">v</span> } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">position</span>(<span class="ident">needle</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="kw-2">mut</span> <span class="ident">haystack</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">i</span> <span class="op">=</span> <span class="number">0</span>; |
| <span class="kw">while</span> <span class="ident">haystack</span>.<span class="ident">len</span>() <span class="op">>=</span> <span class="ident">needle</span>.<span class="ident">len</span>() { |
| <span class="kw">if</span> <span class="ident">needle</span> <span class="op">==</span> <span class="kw-2">&</span><span class="ident">haystack</span>[..<span class="ident">needle</span>.<span class="ident">len</span>()] { |
| <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">i</span>); |
| } |
| <span class="ident">i</span> <span class="op">+=</span> <span class="number">1</span>; |
| <span class="ident">haystack</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">haystack</span>[<span class="number">1</span>..]; |
| } |
| <span class="prelude-val">None</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">escape_unicode</span>(<span class="ident">bytes</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">String</span> { |
| <span class="kw">let</span> <span class="ident">show</span> <span class="op">=</span> <span class="kw">match</span> ::<span class="ident">std</span>::<span class="ident">str</span>::<span class="ident">from_utf8</span>(<span class="ident">bytes</span>) { |
| <span class="prelude-val">Ok</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">v</span>.<span class="ident">to_string</span>(), |
| <span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="ident">escape_bytes</span>(<span class="ident">bytes</span>), |
| }; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">space_escaped</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>(); |
| <span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> <span class="ident">show</span>.<span class="ident">chars</span>() { |
| <span class="kw">if</span> <span class="ident">c</span>.<span class="ident">is_whitespace</span>() { |
| <span class="kw">let</span> <span class="ident">escaped</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op"><=</span> <span class="number">0x7F</span> { |
| <span class="ident">escape_byte</span>(<span class="ident">c</span> <span class="kw">as</span> <span class="ident">u8</span>) |
| } <span class="kw">else</span> { |
| <span class="kw">if</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op"><=</span> <span class="number">0xFFFF</span> { |
| <span class="macro">format</span><span class="macro">!</span>(<span class="string">r"\u{{{:04x}}}"</span>, <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u32</span>) |
| } <span class="kw">else</span> { |
| <span class="macro">format</span><span class="macro">!</span>(<span class="string">r"\U{{{:08x}}}"</span>, <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u32</span>) |
| } |
| }; |
| <span class="ident">space_escaped</span>.<span class="ident">push_str</span>(<span class="kw-2">&</span><span class="ident">escaped</span>); |
| } <span class="kw">else</span> { |
| <span class="ident">space_escaped</span>.<span class="ident">push</span>(<span class="ident">c</span>); |
| } |
| } |
| <span class="ident">space_escaped</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">escape_bytes</span>(<span class="ident">bytes</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">String</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>(); |
| <span class="kw">for</span> <span class="kw-2">&</span><span class="ident">b</span> <span class="kw">in</span> <span class="ident">bytes</span> { |
| <span class="ident">s</span>.<span class="ident">push_str</span>(<span class="kw-2">&</span><span class="ident">escape_byte</span>(<span class="ident">b</span>)); |
| } |
| <span class="ident">s</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">escape_byte</span>(<span class="ident">byte</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">String</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ascii</span>::<span class="ident">escape_default</span>; |
| |
| <span class="kw">let</span> <span class="ident">escaped</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">escape_default</span>(<span class="ident">byte</span>).<span class="ident">collect</span>(); |
| <span class="ident">String</span>::<span class="ident">from_utf8_lossy</span>(<span class="kw-2">&</span><span class="ident">escaped</span>).<span class="ident">into_owned</span>() |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> |
| <span class="kw">mod</span> <span class="ident">tests</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; |
| |
| <span class="kw">use</span> {<span class="ident">Expr</span>, <span class="ident">ExprBuilder</span>}; |
| <span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">Literals</span>, <span class="ident">Lit</span>, <span class="ident">escape_bytes</span>}; |
| |
| <span class="comment">// To make test failures easier to read.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span> |
| <span class="kw">struct</span> <span class="ident">Bytes</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">ULit</span><span class="op">></span>); |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span> |
| <span class="kw">struct</span> <span class="ident">Unicode</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">ULit</span><span class="op">></span>); |
| |
| <span class="kw">fn</span> <span class="ident">escape_lits</span>(<span class="ident">blits</span>: <span class="kw-2">&</span>[<span class="ident">Lit</span>]) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">ULit</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ulits</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[]; |
| <span class="kw">for</span> <span class="ident">blit</span> <span class="kw">in</span> <span class="ident">blits</span> { |
| <span class="ident">ulits</span>.<span class="ident">push</span>(<span class="ident">ULit</span> { <span class="ident">v</span>: <span class="ident">escape_bytes</span>(<span class="kw-2">&</span><span class="ident">blit</span>), <span class="ident">cut</span>: <span class="ident">blit</span>.<span class="ident">is_cut</span>() }); |
| } |
| <span class="ident">ulits</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">create_lits</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">Lit</span><span class="op">>></span>(<span class="ident">it</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">Literals</span> { |
| <span class="ident">Literals</span> { |
| <span class="ident">lits</span>: <span class="ident">it</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>(), |
| <span class="ident">limit_size</span>: <span class="number">0</span>, |
| <span class="ident">limit_class</span>: <span class="number">0</span>, |
| } |
| } |
| |
| <span class="comment">// Needs to be pub for 1.3?</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ULit</span> { |
| <span class="ident">v</span>: <span class="ident">String</span>, |
| <span class="ident">cut</span>: <span class="ident">bool</span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">ULit</span> { |
| <span class="kw">fn</span> <span class="ident">is_cut</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">cut</span> } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">ULit</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">is_cut</span>() { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Cut({})"</span>, <span class="self">self</span>.<span class="ident">v</span>) |
| } <span class="kw">else</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Complete({})"</span>, <span class="self">self</span>.<span class="ident">v</span>) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ULit</span> { |
| <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Lit</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">as_bytes</span>() <span class="op">==</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">other</span>.<span class="ident">v</span> <span class="op">&&</span> <span class="self">self</span>.<span class="ident">is_cut</span>() <span class="op">==</span> <span class="ident">other</span>.<span class="ident">is_cut</span>() |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">ULit</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Lit</span> { |
| <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">ULit</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw-2">&</span><span class="kw-2">*</span><span class="self">self</span>.<span class="ident">v</span> <span class="op">==</span> <span class="ident">other</span>.<span class="ident">v</span>.<span class="ident">as_bytes</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">is_cut</span>() <span class="op">==</span> <span class="ident">other</span>.<span class="ident">is_cut</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_snake_case</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">C</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>) <span class="op">-></span> <span class="ident">ULit</span> { <span class="ident">ULit</span> { <span class="ident">v</span>: <span class="ident">s</span>.<span class="ident">to_owned</span>(), <span class="ident">cut</span>: <span class="bool-val">true</span> } } |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_snake_case</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">M</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>) <span class="op">-></span> <span class="ident">ULit</span> { <span class="ident">ULit</span> { <span class="ident">v</span>: <span class="ident">s</span>.<span class="ident">to_owned</span>(), <span class="ident">cut</span>: <span class="bool-val">false</span> } } |
| |
| <span class="kw">fn</span> <span class="ident">prefixes</span>(<span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) { |
| <span class="ident">lits</span>.<span class="ident">union_prefixes</span>(<span class="ident">expr</span>); |
| } |
| |
| <span class="kw">fn</span> <span class="ident">suffixes</span>(<span class="ident">lits</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Literals</span>, <span class="ident">expr</span>: <span class="kw-2">&</span><span class="ident">Expr</span>) { |
| <span class="ident">lits</span>.<span class="ident">union_suffixes</span>(<span class="ident">expr</span>); |
| } |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">assert_lit_eq</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">got_lits</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected_lit</span>:<span class="ident">expr</span>),<span class="kw-2">*</span>) <span class="op">=></span> {{ |
| <span class="kw">let</span> <span class="ident">expected</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">ULit</span><span class="op">></span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected_lit</span>),<span class="kw-2">*</span>]; |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">got_lits</span>; |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>(<span class="ident">expected</span>.<span class="ident">clone</span>()), |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>(<span class="ident">escape_lits</span>(<span class="ident">lits</span>.<span class="ident">literals</span>()))); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="op">!</span><span class="ident">expected</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="ident">expected</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="op">!</span><span class="ident">l</span>.<span class="ident">is_cut</span>()), |
| <span class="ident">lits</span>.<span class="ident">all_complete</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="ident">expected</span>.<span class="ident">iter</span>().<span class="ident">any</span>(<span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="op">!</span><span class="ident">l</span>.<span class="ident">is_cut</span>()), |
| <span class="ident">lits</span>.<span class="ident">any_complete</span>()); |
| }}; |
| } |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_lit</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>:<span class="ident">expr</span>) <span class="op">=></span> { |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>,); |
| }; |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">lit</span>:<span class="ident">expr</span>),<span class="kw-2">*</span>) <span class="op">=></span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>() { |
| <span class="kw">let</span> <span class="ident">expr</span> <span class="op">=</span> <span class="ident">Expr</span>::<span class="ident">parse</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>).<span class="ident">unwrap</span>(); |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">expr</span>.<span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>(); |
| <span class="macro">assert_lit_eq</span><span class="macro">!</span>(<span class="ident">Unicode</span>, <span class="ident">lits</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">lit</span>),<span class="kw-2">*</span>); |
| |
| <span class="kw">let</span> <span class="ident">expr</span> <span class="op">=</span> <span class="ident">ExprBuilder</span>::<span class="ident">new</span>().<span class="ident">allow_bytes</span>(<span class="bool-val">true</span>).<span class="ident">unicode</span>(<span class="bool-val">false</span>) |
| .<span class="ident">parse</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>).<span class="ident">unwrap</span>(); |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">expr</span>.<span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>(); |
| <span class="macro">assert_lit_eq</span><span class="macro">!</span>(<span class="ident">Bytes</span>, <span class="ident">lits</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">lit</span>),<span class="kw-2">*</span>); |
| } |
| }; |
| } |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for prefix literal extraction.</span> |
| <span class="comment">// ************************************************************************</span> |
| |
| <span class="comment">// Elementary tests.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_one_lit1</span>, <span class="ident">prefixes</span>, <span class="string">"a"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_one_lit2</span>, <span class="ident">prefixes</span>, <span class="string">"abc"</span>, <span class="ident">M</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_one_lit3</span>, <span class="ident">prefixes</span>, <span class="string">"(?u)☃"</span>, <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_one_lit4</span>, <span class="ident">prefixes</span>, <span class="string">"(?ui)☃"</span>, <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_class1</span>, <span class="ident">prefixes</span>, <span class="string">"[1-4]"</span>, |
| <span class="ident">M</span>(<span class="string">"1"</span>), <span class="ident">M</span>(<span class="string">"2"</span>), <span class="ident">M</span>(<span class="string">"3"</span>), <span class="ident">M</span>(<span class="string">"4"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_class2</span>, <span class="ident">prefixes</span>, <span class="string">"(?u)[☃Ⅰ]"</span>, |
| <span class="ident">M</span>(<span class="string">"\\xe2\\x85\\xa0"</span>), <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_class3</span>, <span class="ident">prefixes</span>, <span class="string">"(?ui)[☃Ⅰ]"</span>, |
| <span class="ident">M</span>(<span class="string">"\\xe2\\x85\\xa0"</span>), <span class="ident">M</span>(<span class="string">"\\xe2\\x85\\xb0"</span>), |
| <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_one_lit_casei1</span>, <span class="ident">prefixes</span>, <span class="string">"(?i)a"</span>, |
| <span class="ident">M</span>(<span class="string">"A"</span>), <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_one_lit_casei2</span>, <span class="ident">prefixes</span>, <span class="string">"(?i)abc"</span>, |
| <span class="ident">M</span>(<span class="string">"ABC"</span>), <span class="ident">M</span>(<span class="string">"aBC"</span>), <span class="ident">M</span>(<span class="string">"AbC"</span>), <span class="ident">M</span>(<span class="string">"abC"</span>), |
| <span class="ident">M</span>(<span class="string">"ABc"</span>), <span class="ident">M</span>(<span class="string">"aBc"</span>), <span class="ident">M</span>(<span class="string">"Abc"</span>), <span class="ident">M</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_group1</span>, <span class="ident">prefixes</span>, <span class="string">"(a)"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_zero_or_one1</span>, <span class="ident">prefixes</span>, <span class="string">"a?"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_zero_or_one2</span>, <span class="ident">prefixes</span>, <span class="string">"(?:abc)?"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_zero_or_more1</span>, <span class="ident">prefixes</span>, <span class="string">"a*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_zero_or_more2</span>, <span class="ident">prefixes</span>, <span class="string">"(?:abc)*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_one_or_more1</span>, <span class="ident">prefixes</span>, <span class="string">"a+"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_one_or_more2</span>, <span class="ident">prefixes</span>, <span class="string">"(?:abc)+"</span>, <span class="ident">C</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_nested_one_or_more</span>, <span class="ident">prefixes</span>, <span class="string">"(?:a+)+"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range1</span>, <span class="ident">prefixes</span>, <span class="string">"a{0}"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range2</span>, <span class="ident">prefixes</span>, <span class="string">"a{0,}"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range3</span>, <span class="ident">prefixes</span>, <span class="string">"a{0,1}"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range4</span>, <span class="ident">prefixes</span>, <span class="string">"a{1}"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range5</span>, <span class="ident">prefixes</span>, <span class="string">"a{2}"</span>, <span class="ident">M</span>(<span class="string">"aa"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range6</span>, <span class="ident">prefixes</span>, <span class="string">"a{1,2}"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_rep_range7</span>, <span class="ident">prefixes</span>, <span class="string">"a{2,3}"</span>, <span class="ident">C</span>(<span class="string">"aa"</span>)); |
| |
| <span class="comment">// Test regexes with concatenations.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat1</span>, <span class="ident">prefixes</span>, <span class="string">"(?:a)(?:b)"</span>, <span class="ident">M</span>(<span class="string">"ab"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat2</span>, <span class="ident">prefixes</span>, <span class="string">"[ab]z"</span>, <span class="ident">M</span>(<span class="string">"az"</span>), <span class="ident">M</span>(<span class="string">"bz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat3</span>, <span class="ident">prefixes</span>, <span class="string">"(?i)[ab]z"</span>, |
| <span class="ident">M</span>(<span class="string">"AZ"</span>), <span class="ident">M</span>(<span class="string">"BZ"</span>), <span class="ident">M</span>(<span class="string">"aZ"</span>), <span class="ident">M</span>(<span class="string">"bZ"</span>), |
| <span class="ident">M</span>(<span class="string">"Az"</span>), <span class="ident">M</span>(<span class="string">"Bz"</span>), <span class="ident">M</span>(<span class="string">"az"</span>), <span class="ident">M</span>(<span class="string">"bz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat4</span>, <span class="ident">prefixes</span>, <span class="string">"[ab][yz]"</span>, |
| <span class="ident">M</span>(<span class="string">"ay"</span>), <span class="ident">M</span>(<span class="string">"by"</span>), <span class="ident">M</span>(<span class="string">"az"</span>), <span class="ident">M</span>(<span class="string">"bz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat5</span>, <span class="ident">prefixes</span>, <span class="string">"a*b"</span>, <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">M</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat6</span>, <span class="ident">prefixes</span>, <span class="string">"a*b*c"</span>, <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat7</span>, <span class="ident">prefixes</span>, <span class="string">"a*b*c+"</span>, <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>), <span class="ident">C</span>(<span class="string">"c"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat8</span>, <span class="ident">prefixes</span>, <span class="string">"a*b+c"</span>, <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat9</span>, <span class="ident">prefixes</span>, <span class="string">"a*b+c*"</span>, <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat10</span>, <span class="ident">prefixes</span>, <span class="string">"ab*"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat11</span>, <span class="ident">prefixes</span>, <span class="string">"ab*c"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"ac"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat12</span>, <span class="ident">prefixes</span>, <span class="string">"ab+"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat13</span>, <span class="ident">prefixes</span>, <span class="string">"ab+c"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat14</span>, <span class="ident">prefixes</span>, <span class="string">"a^"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat15</span>, <span class="ident">prefixes</span>, <span class="string">"$a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat16</span>, <span class="ident">prefixes</span>, <span class="string">r"ab*c"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"ac"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat17</span>, <span class="ident">prefixes</span>, <span class="string">r"ab+c"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat18</span>, <span class="ident">prefixes</span>, <span class="string">r"z*azb"</span>, <span class="ident">C</span>(<span class="string">"z"</span>), <span class="ident">M</span>(<span class="string">"azb"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_cat19</span>, <span class="ident">prefixes</span>, <span class="string">"a.z"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| |
| <span class="comment">// Test regexes with alternations.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt1</span>, <span class="ident">prefixes</span>, <span class="string">"a|b"</span>, <span class="ident">M</span>(<span class="string">"a"</span>), <span class="ident">M</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt2</span>, <span class="ident">prefixes</span>, <span class="string">"[1-3]|b"</span>, <span class="ident">M</span>(<span class="string">"1"</span>), <span class="ident">M</span>(<span class="string">"2"</span>), <span class="ident">M</span>(<span class="string">"3"</span>), <span class="ident">M</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt3</span>, <span class="ident">prefixes</span>, <span class="string">"y(?:a|b)z"</span>, <span class="ident">M</span>(<span class="string">"yaz"</span>), <span class="ident">M</span>(<span class="string">"ybz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt4</span>, <span class="ident">prefixes</span>, <span class="string">"a|b*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt5</span>, <span class="ident">prefixes</span>, <span class="string">"a|b+"</span>, <span class="ident">M</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt6</span>, <span class="ident">prefixes</span>, <span class="string">"a|(?:b|c*)"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt7</span>, <span class="ident">prefixes</span>, <span class="string">"(a|b)*c|(a|ab)*c"</span>, |
| <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>), <span class="ident">M</span>(<span class="string">"c"</span>), <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_alt8</span>, <span class="ident">prefixes</span>, <span class="string">"a*b|c"</span>, <span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">M</span>(<span class="string">"b"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)); |
| |
| <span class="comment">// Test regexes with empty assertions.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_empty1</span>, <span class="ident">prefixes</span>, <span class="string">"^a"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_empty2</span>, <span class="ident">prefixes</span>, <span class="string">"^abc"</span>, <span class="ident">M</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_empty3</span>, <span class="ident">prefixes</span>, <span class="string">"(?:^abc)|(?:^z)"</span>, <span class="ident">M</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"z"</span>)); |
| |
| <span class="comment">// Make sure some curious regexes have no prefixes.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing1</span>, <span class="ident">prefixes</span>, <span class="string">"."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing2</span>, <span class="ident">prefixes</span>, <span class="string">"(?s)."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing3</span>, <span class="ident">prefixes</span>, <span class="string">"^"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing4</span>, <span class="ident">prefixes</span>, <span class="string">"$"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing6</span>, <span class="ident">prefixes</span>, <span class="string">"(?m)$"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing7</span>, <span class="ident">prefixes</span>, <span class="string">r"\b"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_nothing8</span>, <span class="ident">prefixes</span>, <span class="string">r"\B"</span>); |
| |
| <span class="comment">// Test a few regexes that defeat any prefix literal detection.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated1</span>, <span class="ident">prefixes</span>, <span class="string">".a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated2</span>, <span class="ident">prefixes</span>, <span class="string">"(?s).a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated3</span>, <span class="ident">prefixes</span>, <span class="string">"a*b*c*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated4</span>, <span class="ident">prefixes</span>, <span class="string">"a|."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated5</span>, <span class="ident">prefixes</span>, <span class="string">".|a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated6</span>, <span class="ident">prefixes</span>, <span class="string">"a|^"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated7</span>, <span class="ident">prefixes</span>, <span class="string">".(?:a(?:b)(?:c))"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated8</span>, <span class="ident">prefixes</span>, <span class="string">"$a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated9</span>, <span class="ident">prefixes</span>, <span class="string">"(?m)$a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated10</span>, <span class="ident">prefixes</span>, <span class="string">r"\ba"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated11</span>, <span class="ident">prefixes</span>, <span class="string">r"\Ba"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated12</span>, <span class="ident">prefixes</span>, <span class="string">"^*a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">pfx_defeated13</span>, <span class="ident">prefixes</span>, <span class="string">"^+a"</span>); |
| |
| <span class="macro">test_lit</span><span class="macro">!</span>( |
| <span class="ident">pfx_crazy1</span>, |
| <span class="ident">prefixes</span>, |
| <span class="string">r"M[ou]'?am+[ae]r .*([AEae]l[- ])?[GKQ]h?[aeu]+([dtz][dhz]?)+af[iy]"</span>, |
| <span class="ident">C</span>(<span class="string">"Mo\\'am"</span>), <span class="ident">C</span>(<span class="string">"Mu\\'am"</span>), <span class="ident">C</span>(<span class="string">"Moam"</span>), <span class="ident">C</span>(<span class="string">"Muam"</span>)); |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for quiting prefix literal search.</span> |
| <span class="comment">// ************************************************************************</span> |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_exhausted</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>:<span class="ident">expr</span>) <span class="op">=></span> { |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>,); |
| }; |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">lit</span>:<span class="ident">expr</span>),<span class="kw-2">*</span>) <span class="op">=></span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>() { |
| <span class="kw">let</span> <span class="ident">expr</span> <span class="op">=</span> <span class="ident">Expr</span>::<span class="ident">parse</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>).<span class="ident">unwrap</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">Literals</span>::<span class="ident">empty</span>(); |
| <span class="ident">lits</span>.<span class="ident">set_limit_size</span>(<span class="number">20</span>).<span class="ident">set_limit_class</span>(<span class="number">10</span>); |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits</span>, <span class="kw-2">&</span><span class="ident">expr</span>); |
| <span class="macro">assert_lit_eq</span><span class="macro">!</span>(<span class="ident">Unicode</span>, <span class="ident">lits</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">lit</span>),<span class="kw-2">*</span>); |
| |
| <span class="kw">let</span> <span class="ident">expr</span> <span class="op">=</span> <span class="ident">ExprBuilder</span>::<span class="ident">new</span>().<span class="ident">allow_bytes</span>(<span class="bool-val">true</span>).<span class="ident">unicode</span>(<span class="bool-val">false</span>) |
| .<span class="ident">parse</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">re</span>).<span class="ident">unwrap</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">Literals</span>::<span class="ident">empty</span>(); |
| <span class="ident">lits</span>.<span class="ident">set_limit_size</span>(<span class="number">20</span>).<span class="ident">set_limit_class</span>(<span class="number">10</span>); |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">which</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">lits</span>, <span class="kw-2">&</span><span class="ident">expr</span>); |
| <span class="macro">assert_lit_eq</span><span class="macro">!</span>(<span class="ident">Bytes</span>, <span class="ident">lits</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">lit</span>),<span class="kw-2">*</span>); |
| } |
| }; |
| } |
| |
| <span class="comment">// These test use a much lower limit than the default so that we can</span> |
| <span class="comment">// write test cases of reasonable size.</span> |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted1</span>, <span class="ident">prefixes</span>, <span class="string">"[a-z]"</span>); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted2</span>, <span class="ident">prefixes</span>, <span class="string">"[a-z]*A"</span>); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted3</span>, <span class="ident">prefixes</span>, <span class="string">"A[a-z]Z"</span>, <span class="ident">C</span>(<span class="string">"A"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted4</span>, <span class="ident">prefixes</span>, <span class="string">"(?i)foobar"</span>, |
| <span class="ident">C</span>(<span class="string">"FO"</span>), <span class="ident">C</span>(<span class="string">"fO"</span>), <span class="ident">C</span>(<span class="string">"Fo"</span>), <span class="ident">C</span>(<span class="string">"fo"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted5</span>, <span class="ident">prefixes</span>, <span class="string">"(?:ab){100}"</span>, |
| <span class="ident">C</span>(<span class="string">"abababababababababab"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted6</span>, <span class="ident">prefixes</span>, <span class="string">"(?:(?:ab){100})*cd"</span>, |
| <span class="ident">C</span>(<span class="string">"ababababab"</span>), <span class="ident">M</span>(<span class="string">"cd"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted7</span>, <span class="ident">prefixes</span>, <span class="string">"z(?:(?:ab){100})*cd"</span>, |
| <span class="ident">C</span>(<span class="string">"zababababab"</span>), <span class="ident">M</span>(<span class="string">"zcd"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">pfx_exhausted8</span>, <span class="ident">prefixes</span>, <span class="string">"aaaaaaaaaaaaaaaaaaaaz"</span>, |
| <span class="ident">C</span>(<span class="string">"aaaaaaaaaaaaaaaaaaaa"</span>)); |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for suffix literal extraction.</span> |
| <span class="comment">// ************************************************************************</span> |
| |
| <span class="comment">// Elementary tests.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_one_lit1</span>, <span class="ident">suffixes</span>, <span class="string">"a"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_one_lit2</span>, <span class="ident">suffixes</span>, <span class="string">"abc"</span>, <span class="ident">M</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_one_lit3</span>, <span class="ident">suffixes</span>, <span class="string">"(?u)☃"</span>, <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_one_lit4</span>, <span class="ident">suffixes</span>, <span class="string">"(?ui)☃"</span>, <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_class1</span>, <span class="ident">suffixes</span>, <span class="string">"[1-4]"</span>, |
| <span class="ident">M</span>(<span class="string">"1"</span>), <span class="ident">M</span>(<span class="string">"2"</span>), <span class="ident">M</span>(<span class="string">"3"</span>), <span class="ident">M</span>(<span class="string">"4"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_class2</span>, <span class="ident">suffixes</span>, <span class="string">"(?u)[☃Ⅰ]"</span>, |
| <span class="ident">M</span>(<span class="string">"\\xe2\\x85\\xa0"</span>), <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_class3</span>, <span class="ident">suffixes</span>, <span class="string">"(?ui)[☃Ⅰ]"</span>, |
| <span class="ident">M</span>(<span class="string">"\\xe2\\x85\\xa0"</span>), <span class="ident">M</span>(<span class="string">"\\xe2\\x85\\xb0"</span>), |
| <span class="ident">M</span>(<span class="string">"\\xe2\\x98\\x83"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_one_lit_casei1</span>, <span class="ident">suffixes</span>, <span class="string">"(?i)a"</span>, |
| <span class="ident">M</span>(<span class="string">"A"</span>), <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_one_lit_casei2</span>, <span class="ident">suffixes</span>, <span class="string">"(?i)abc"</span>, |
| <span class="ident">M</span>(<span class="string">"ABC"</span>), <span class="ident">M</span>(<span class="string">"ABc"</span>), <span class="ident">M</span>(<span class="string">"AbC"</span>), <span class="ident">M</span>(<span class="string">"Abc"</span>), |
| <span class="ident">M</span>(<span class="string">"aBC"</span>), <span class="ident">M</span>(<span class="string">"aBc"</span>), <span class="ident">M</span>(<span class="string">"abC"</span>), <span class="ident">M</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_group1</span>, <span class="ident">suffixes</span>, <span class="string">"(a)"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_zero_or_one1</span>, <span class="ident">suffixes</span>, <span class="string">"a?"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_zero_or_one2</span>, <span class="ident">suffixes</span>, <span class="string">"(?:abc)?"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_zero_or_more1</span>, <span class="ident">suffixes</span>, <span class="string">"a*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_zero_or_more2</span>, <span class="ident">suffixes</span>, <span class="string">"(?:abc)*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_one_or_more1</span>, <span class="ident">suffixes</span>, <span class="string">"a+"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_one_or_more2</span>, <span class="ident">suffixes</span>, <span class="string">"(?:abc)+"</span>, <span class="ident">C</span>(<span class="string">"abc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_nested_one_or_more</span>, <span class="ident">suffixes</span>, <span class="string">"(?:a+)+"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range1</span>, <span class="ident">suffixes</span>, <span class="string">"a{0}"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range2</span>, <span class="ident">suffixes</span>, <span class="string">"a{0,}"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range3</span>, <span class="ident">suffixes</span>, <span class="string">"a{0,1}"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range4</span>, <span class="ident">suffixes</span>, <span class="string">"a{1}"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range5</span>, <span class="ident">suffixes</span>, <span class="string">"a{2}"</span>, <span class="ident">M</span>(<span class="string">"aa"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range6</span>, <span class="ident">suffixes</span>, <span class="string">"a{1,2}"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_rep_range7</span>, <span class="ident">suffixes</span>, <span class="string">"a{2,3}"</span>, <span class="ident">C</span>(<span class="string">"aa"</span>)); |
| |
| <span class="comment">// Test regexes with concatenations.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat1</span>, <span class="ident">suffixes</span>, <span class="string">"(?:a)(?:b)"</span>, <span class="ident">M</span>(<span class="string">"ab"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat2</span>, <span class="ident">suffixes</span>, <span class="string">"[ab]z"</span>, <span class="ident">M</span>(<span class="string">"az"</span>), <span class="ident">M</span>(<span class="string">"bz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat3</span>, <span class="ident">suffixes</span>, <span class="string">"(?i)[ab]z"</span>, |
| <span class="ident">M</span>(<span class="string">"AZ"</span>), <span class="ident">M</span>(<span class="string">"Az"</span>), <span class="ident">M</span>(<span class="string">"BZ"</span>), <span class="ident">M</span>(<span class="string">"Bz"</span>), |
| <span class="ident">M</span>(<span class="string">"aZ"</span>), <span class="ident">M</span>(<span class="string">"az"</span>), <span class="ident">M</span>(<span class="string">"bZ"</span>), <span class="ident">M</span>(<span class="string">"bz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat4</span>, <span class="ident">suffixes</span>, <span class="string">"[ab][yz]"</span>, |
| <span class="ident">M</span>(<span class="string">"ay"</span>), <span class="ident">M</span>(<span class="string">"az"</span>), <span class="ident">M</span>(<span class="string">"by"</span>), <span class="ident">M</span>(<span class="string">"bz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat5</span>, <span class="ident">suffixes</span>, <span class="string">"a*b"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat6</span>, <span class="ident">suffixes</span>, <span class="string">"a*b*c"</span>, <span class="ident">C</span>(<span class="string">"bc"</span>), <span class="ident">C</span>(<span class="string">"ac"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat7</span>, <span class="ident">suffixes</span>, <span class="string">"a*b*c+"</span>, <span class="ident">C</span>(<span class="string">"c"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat8</span>, <span class="ident">suffixes</span>, <span class="string">"a*b+c"</span>, <span class="ident">C</span>(<span class="string">"bc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat9</span>, <span class="ident">suffixes</span>, <span class="string">"a*b+c*"</span>, <span class="ident">C</span>(<span class="string">"c"</span>), <span class="ident">C</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat10</span>, <span class="ident">suffixes</span>, <span class="string">"ab*"</span>, <span class="ident">C</span>(<span class="string">"b"</span>), <span class="ident">M</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat11</span>, <span class="ident">suffixes</span>, <span class="string">"ab*c"</span>, <span class="ident">C</span>(<span class="string">"bc"</span>), <span class="ident">M</span>(<span class="string">"ac"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat12</span>, <span class="ident">suffixes</span>, <span class="string">"ab+"</span>, <span class="ident">C</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat13</span>, <span class="ident">suffixes</span>, <span class="string">"ab+c"</span>, <span class="ident">C</span>(<span class="string">"bc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat14</span>, <span class="ident">suffixes</span>, <span class="string">"a^"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat15</span>, <span class="ident">suffixes</span>, <span class="string">"$a"</span>, <span class="ident">C</span>(<span class="string">"a"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat16</span>, <span class="ident">suffixes</span>, <span class="string">r"ab*c"</span>, <span class="ident">C</span>(<span class="string">"bc"</span>), <span class="ident">M</span>(<span class="string">"ac"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat17</span>, <span class="ident">suffixes</span>, <span class="string">r"ab+c"</span>, <span class="ident">C</span>(<span class="string">"bc"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat18</span>, <span class="ident">suffixes</span>, <span class="string">r"z*azb"</span>, <span class="ident">C</span>(<span class="string">"zazb"</span>), <span class="ident">M</span>(<span class="string">"azb"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_cat19</span>, <span class="ident">suffixes</span>, <span class="string">"a.z"</span>, <span class="ident">C</span>(<span class="string">"z"</span>)); |
| |
| <span class="comment">// Test regexes with alternations.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt1</span>, <span class="ident">suffixes</span>, <span class="string">"a|b"</span>, <span class="ident">M</span>(<span class="string">"a"</span>), <span class="ident">M</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt2</span>, <span class="ident">suffixes</span>, <span class="string">"[1-3]|b"</span>, <span class="ident">M</span>(<span class="string">"1"</span>), <span class="ident">M</span>(<span class="string">"2"</span>), <span class="ident">M</span>(<span class="string">"3"</span>), <span class="ident">M</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt3</span>, <span class="ident">suffixes</span>, <span class="string">"y(?:a|b)z"</span>, <span class="ident">M</span>(<span class="string">"yaz"</span>), <span class="ident">M</span>(<span class="string">"ybz"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt4</span>, <span class="ident">suffixes</span>, <span class="string">"a|b*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt5</span>, <span class="ident">suffixes</span>, <span class="string">"a|b+"</span>, <span class="ident">M</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt6</span>, <span class="ident">suffixes</span>, <span class="string">"a|(?:b|c*)"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt7</span>, <span class="ident">suffixes</span>, <span class="string">"(a|b)*c|(a|ab)*c"</span>, |
| <span class="ident">C</span>(<span class="string">"ac"</span>), <span class="ident">C</span>(<span class="string">"bc"</span>), <span class="ident">M</span>(<span class="string">"c"</span>), <span class="ident">C</span>(<span class="string">"ac"</span>), <span class="ident">C</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_alt8</span>, <span class="ident">suffixes</span>, <span class="string">"a*b|c"</span>, <span class="ident">C</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"b"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)); |
| |
| <span class="comment">// Test regexes with empty assertions.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_empty1</span>, <span class="ident">suffixes</span>, <span class="string">"a$"</span>, <span class="ident">M</span>(<span class="string">"a"</span>)); |
| |
| <span class="comment">// Make sure some curious regexes have no suffixes.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing1</span>, <span class="ident">suffixes</span>, <span class="string">"."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing2</span>, <span class="ident">suffixes</span>, <span class="string">"(?s)."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing3</span>, <span class="ident">suffixes</span>, <span class="string">"^"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing4</span>, <span class="ident">suffixes</span>, <span class="string">"$"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing6</span>, <span class="ident">suffixes</span>, <span class="string">"(?m)$"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing7</span>, <span class="ident">suffixes</span>, <span class="string">r"\b"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_nothing8</span>, <span class="ident">suffixes</span>, <span class="string">r"\B"</span>); |
| |
| <span class="comment">// Test a few regexes that defeat any suffix literal detection.</span> |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated1</span>, <span class="ident">suffixes</span>, <span class="string">"a."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated2</span>, <span class="ident">suffixes</span>, <span class="string">"(?s)a."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated3</span>, <span class="ident">suffixes</span>, <span class="string">"a*b*c*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated4</span>, <span class="ident">suffixes</span>, <span class="string">"a|."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated5</span>, <span class="ident">suffixes</span>, <span class="string">".|a"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated6</span>, <span class="ident">suffixes</span>, <span class="string">"a|^"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated7</span>, <span class="ident">suffixes</span>, <span class="string">"(?:a(?:b)(?:c))."</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated8</span>, <span class="ident">suffixes</span>, <span class="string">"a^"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated9</span>, <span class="ident">suffixes</span>, <span class="string">"(?m)a$"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated10</span>, <span class="ident">suffixes</span>, <span class="string">r"a\b"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated11</span>, <span class="ident">suffixes</span>, <span class="string">r"a\B"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated12</span>, <span class="ident">suffixes</span>, <span class="string">"a^*"</span>); |
| <span class="macro">test_lit</span><span class="macro">!</span>(<span class="ident">sfx_defeated13</span>, <span class="ident">suffixes</span>, <span class="string">"a^+"</span>); |
| |
| <span class="comment">// These test use a much lower limit than the default so that we can</span> |
| <span class="comment">// write test cases of reasonable size.</span> |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted1</span>, <span class="ident">suffixes</span>, <span class="string">"[a-z]"</span>); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted2</span>, <span class="ident">suffixes</span>, <span class="string">"A[a-z]*"</span>); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted3</span>, <span class="ident">suffixes</span>, <span class="string">"A[a-z]Z"</span>, <span class="ident">C</span>(<span class="string">"Z"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted4</span>, <span class="ident">suffixes</span>, <span class="string">"(?i)foobar"</span>, |
| <span class="ident">C</span>(<span class="string">"AR"</span>), <span class="ident">C</span>(<span class="string">"Ar"</span>), <span class="ident">C</span>(<span class="string">"aR"</span>), <span class="ident">C</span>(<span class="string">"ar"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted5</span>, <span class="ident">suffixes</span>, <span class="string">"(?:ab){100}"</span>, |
| <span class="ident">C</span>(<span class="string">"abababababababababab"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted6</span>, <span class="ident">suffixes</span>, <span class="string">"cd(?:(?:ab){100})*"</span>, |
| <span class="ident">C</span>(<span class="string">"ababababab"</span>), <span class="ident">M</span>(<span class="string">"cd"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted7</span>, <span class="ident">suffixes</span>, <span class="string">"cd(?:(?:ab){100})*z"</span>, |
| <span class="ident">C</span>(<span class="string">"abababababz"</span>), <span class="ident">M</span>(<span class="string">"cdz"</span>)); |
| <span class="macro">test_exhausted</span><span class="macro">!</span>(<span class="ident">sfx_exhausted8</span>, <span class="ident">suffixes</span>, <span class="string">"zaaaaaaaaaaaaaaaaaaaa"</span>, |
| <span class="ident">C</span>(<span class="string">"aaaaaaaaaaaaaaaaaaaa"</span>)); |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for generating unambiguous literal sets.</span> |
| <span class="comment">// ************************************************************************</span> |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_unamb</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>:<span class="ident">expr</span>) <span class="op">=></span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>() { |
| <span class="kw">let</span> <span class="ident">given</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> <span class="op">=</span> |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span> |
| .<span class="ident">into_iter</span>() |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">ul</span><span class="op">|</span> { |
| <span class="kw">let</span> <span class="ident">cut</span> <span class="op">=</span> <span class="ident">ul</span>.<span class="ident">is_cut</span>(); |
| <span class="ident">Lit</span> { <span class="ident">v</span>: <span class="ident">ul</span>.<span class="ident">v</span>.<span class="ident">into_bytes</span>(), <span class="ident">cut</span>: <span class="ident">cut</span> } |
| }) |
| .<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">create_lits</span>(<span class="ident">given</span>); |
| <span class="kw">let</span> <span class="ident">got</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">unambiguous_prefixes</span>(); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>, <span class="ident">escape_lits</span>(<span class="ident">got</span>.<span class="ident">literals</span>())); |
| } |
| }; |
| } |
| |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous1</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"z"</span>), <span class="ident">M</span>(<span class="string">"azb"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"z"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous2</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"zaaaaaa"</span>), <span class="ident">M</span>(<span class="string">"aa"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"aa"</span>), <span class="ident">C</span>(<span class="string">"z"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous3</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"Sherlock"</span>), <span class="ident">M</span>(<span class="string">"Watson"</span>)], |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"Sherlock"</span>), <span class="ident">M</span>(<span class="string">"Watson"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous4</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"bc"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"bc"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous5</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"bc"</span>), <span class="ident">M</span>(<span class="string">"abc"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"bc"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous6</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"a"</span>), <span class="ident">M</span>(<span class="string">"aa"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous7</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"aa"</span>), <span class="ident">M</span>(<span class="string">"a"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous8</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"a"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous9</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"ac"</span>), <span class="ident">M</span>(<span class="string">"bc"</span>), <span class="ident">M</span>(<span class="string">"c"</span>), <span class="ident">M</span>(<span class="string">"ac"</span>), <span class="ident">M</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"c"</span>)], |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"b"</span>), <span class="ident">C</span>(<span class="string">"c"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous10</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"Mo'"</span>), <span class="ident">M</span>(<span class="string">"Mu'"</span>), <span class="ident">M</span>(<span class="string">"Mo"</span>), <span class="ident">M</span>(<span class="string">"Mu"</span>)], |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"Mo"</span>), <span class="ident">C</span>(<span class="string">"Mu"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous11</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"zazb"</span>), <span class="ident">M</span>(<span class="string">"azb"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"z"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous12</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"foo"</span>), <span class="ident">C</span>(<span class="string">"foo"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"foo"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous13</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"ABCX"</span>), <span class="ident">M</span>(<span class="string">"CDAX"</span>), <span class="ident">M</span>(<span class="string">"BCX"</span>)], |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"A"</span>), <span class="ident">C</span>(<span class="string">"BCX"</span>), <span class="ident">C</span>(<span class="string">"CD"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous14</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"IMGX"</span>), <span class="ident">M</span>(<span class="string">"MVIX"</span>), <span class="ident">M</span>(<span class="string">"MGX"</span>), <span class="ident">M</span>(<span class="string">"DSX"</span>)], |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"DSX"</span>), <span class="ident">C</span>(<span class="string">"I"</span>), <span class="ident">C</span>(<span class="string">"MGX"</span>), <span class="ident">C</span>(<span class="string">"MV"</span>)]); |
| <span class="macro">test_unamb</span><span class="macro">!</span>(<span class="ident">unambiguous15</span>, |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"IMG_"</span>), <span class="ident">M</span>(<span class="string">"MG_"</span>), <span class="ident">M</span>(<span class="string">"CIMG"</span>)], |
| <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"C"</span>), <span class="ident">C</span>(<span class="string">"I"</span>), <span class="ident">C</span>(<span class="string">"MG_"</span>)]); |
| |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for suffix trimming.</span> |
| <span class="comment">// ************************************************************************</span> |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_trim</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">trim</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>:<span class="ident">expr</span>) <span class="op">=></span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>() { |
| <span class="kw">let</span> <span class="ident">given</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> <span class="op">=</span> |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span> |
| .<span class="ident">into_iter</span>() |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">ul</span><span class="op">|</span> { |
| <span class="kw">let</span> <span class="ident">cut</span> <span class="op">=</span> <span class="ident">ul</span>.<span class="ident">is_cut</span>(); |
| <span class="ident">Lit</span> { <span class="ident">v</span>: <span class="ident">ul</span>.<span class="ident">v</span>.<span class="ident">into_bytes</span>(), <span class="ident">cut</span>: <span class="ident">cut</span> } |
| }) |
| .<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">create_lits</span>(<span class="ident">given</span>); |
| <span class="kw">let</span> <span class="ident">got</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">trim_suffix</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">trim</span>).<span class="ident">unwrap</span>(); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>, <span class="ident">escape_lits</span>(<span class="ident">got</span>.<span class="ident">literals</span>())); |
| } |
| } |
| } |
| |
| <span class="macro">test_trim</span><span class="macro">!</span>(<span class="ident">trim1</span>, <span class="number">1</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"ab"</span>), <span class="ident">M</span>(<span class="string">"yz"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"y"</span>)]); |
| <span class="macro">test_trim</span><span class="macro">!</span>(<span class="ident">trim2</span>, <span class="number">1</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"abd"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"ab"</span>)]); |
| <span class="macro">test_trim</span><span class="macro">!</span>(<span class="ident">trim3</span>, <span class="number">2</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"abd"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>)]); |
| <span class="macro">test_trim</span><span class="macro">!</span>(<span class="ident">trim4</span>, <span class="number">2</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">M</span>(<span class="string">"abc"</span>), <span class="ident">M</span>(<span class="string">"ghij"</span>)], <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">C</span>(<span class="string">"a"</span>), <span class="ident">C</span>(<span class="string">"gh"</span>)]); |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for longest common prefix.</span> |
| <span class="comment">// ************************************************************************</span> |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_lcp</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>:<span class="ident">expr</span>) <span class="op">=></span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>() { |
| <span class="kw">let</span> <span class="ident">given</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> <span class="op">=</span> |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span> |
| .<span class="ident">into_iter</span>() |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span><span class="op">|</span> <span class="ident">Lit</span> { |
| <span class="ident">v</span>: <span class="ident">s</span>.<span class="ident">to_owned</span>().<span class="ident">into_bytes</span>(), |
| <span class="ident">cut</span>: <span class="bool-val">false</span>, |
| }) |
| .<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">create_lits</span>(<span class="ident">given</span>); |
| <span class="kw">let</span> <span class="ident">got</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">longest_common_prefix</span>(); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>, <span class="ident">escape_bytes</span>(<span class="ident">got</span>)); |
| } |
| }; |
| } |
| |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp1</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>], <span class="string">"a"</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp2</span>, <span class="macro">vec</span><span class="macro">!</span>[], <span class="string">""</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp3</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"b"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp4</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"ab"</span>, <span class="string">"ab"</span>], <span class="string">"ab"</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp5</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"ab"</span>, <span class="string">"a"</span>], <span class="string">"a"</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp6</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"ab"</span>], <span class="string">"a"</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp7</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"ab"</span>, <span class="string">"b"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp8</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"b"</span>, <span class="string">"ab"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp9</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"foobar"</span>, <span class="string">"foobaz"</span>], <span class="string">"fooba"</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp10</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"foobar"</span>, <span class="string">"foobaz"</span>, <span class="string">"a"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp11</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"foobar"</span>, <span class="string">"foobaz"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcp</span><span class="macro">!</span>(<span class="ident">lcp12</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"foo"</span>, <span class="string">"flub"</span>, <span class="string">"flab"</span>, <span class="string">"floo"</span>], <span class="string">"f"</span>); |
| |
| <span class="comment">// ************************************************************************</span> |
| <span class="comment">// Tests for longest common suffix.</span> |
| <span class="comment">// ************************************************************************</span> |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">test_lcs</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>:<span class="ident">expr</span>) <span class="op">=></span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>() { |
| <span class="kw">let</span> <span class="ident">given</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Lit</span><span class="op">></span> <span class="op">=</span> |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">given</span> |
| .<span class="ident">into_iter</span>() |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span><span class="op">|</span> <span class="ident">Lit</span> { |
| <span class="ident">v</span>: <span class="ident">s</span>.<span class="ident">to_owned</span>().<span class="ident">into_bytes</span>(), |
| <span class="ident">cut</span>: <span class="bool-val">false</span>, |
| }) |
| .<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="ident">lits</span> <span class="op">=</span> <span class="ident">create_lits</span>(<span class="ident">given</span>); |
| <span class="kw">let</span> <span class="ident">got</span> <span class="op">=</span> <span class="ident">lits</span>.<span class="ident">longest_common_suffix</span>(); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expected</span>, <span class="ident">escape_bytes</span>(<span class="ident">got</span>)); |
| } |
| }; |
| } |
| |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs1</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>], <span class="string">"a"</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs2</span>, <span class="macro">vec</span><span class="macro">!</span>[], <span class="string">""</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs3</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"b"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs4</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"ab"</span>, <span class="string">"ab"</span>], <span class="string">"ab"</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs5</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"ab"</span>, <span class="string">"a"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs6</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"ab"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs7</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"ab"</span>, <span class="string">"b"</span>], <span class="string">"b"</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs8</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"b"</span>, <span class="string">"ab"</span>], <span class="string">"b"</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs9</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"barfoo"</span>, <span class="string">"bazfoo"</span>], <span class="string">"foo"</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs10</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"barfoo"</span>, <span class="string">"bazfoo"</span>, <span class="string">"a"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs11</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"barfoo"</span>, <span class="string">"bazfoo"</span>], <span class="string">""</span>); |
| <span class="macro">test_lcs</span><span class="macro">!</span>(<span class="ident">lcs12</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"flub"</span>, <span class="string">"bub"</span>, <span class="string">"boob"</span>, <span class="string">"dub"</span>], <span class="string">"b"</span>); |
| } |
| </pre> |
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