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| </pre><pre class="rust "> |
| <span class="comment">// macros.rs</span> |
| <span class="comment">// This file is part of the Eclipse Paho MQTT Rust Client library.</span> |
| <span class="comment">//</span> |
| |
| <span class="comment">/******************************************************************************* |
| * Copyright (c) 2017 Frank Pagliughi <fpagliughi@mindspring.com> |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * and Eclipse Distribution License v1.0 which accompany this distribution. |
| * |
| * The Eclipse Public License is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * and the Eclipse Distribution License is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * Contributors: |
| * Frank Pagliughi - initial implementation and documentation |
| *******************************************************************************/</span> |
| |
| |
| <span class="attribute">#<span class="op">!</span>[<span class="ident">macro_use</span>]</span> |
| |
| <span class="doccomment">/// Return an error from a function. </span> |
| |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">fail</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>:<span class="ident">expr</span>) <span class="op">=></span> ( |
| <span class="kw">return</span> <span class="prelude-val">Err</span>(::<span class="ident">std</span>::<span class="ident">convert</span>::<span class="ident">From</span>::<span class="ident">from</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">expr</span>)); |
| ) |
| } |
| |
| <span class="comment">/* |
| /// Create a vector of string from str references. |
| macro_rules! vec_of_strings { |
| ($($x:expr),*) => (vec![$($x.to_string()),*]); |
| } |
| */</span> |
| </pre> |
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