| -------------------------------------------------------------------------------- |
| -- Copyright (c) 2006-2013 Fabien Fleutot and others. |
| -- |
| -- All rights reserved. |
| -- |
| -- This program and the accompanying materials are made available |
| -- under the terms of the Eclipse Public License v1.0 which |
| -- accompanies this distribution, and is available at |
| -- http://www.eclipse.org/legal/epl-v10.html |
| -- |
| -- This program and the accompanying materials are also made available |
| -- under the terms of the MIT public license which accompanies this |
| -- distribution, and is available at http://www.lua.org/license.html |
| -- |
| -- Contributors: |
| -- Fabien Fleutot - API and implementation |
| -- |
| -------------------------------------------------------------------------------- |
| |
| -------------------------------------------------------------------------------- |
| -- |
| -- Copyright (c) 2006-2012, Fabien Fleutot <metalua@gmail.com>. |
| -- |
| -- This software is released under the MIT Licence, see licence.txt |
| -- for details. |
| -- |
| -------------------------------------------------------------------------------- |
| |
| -------------------------------------------------------------------------------- |
| -- |
| -- Exported API: |
| -- * [M.bracket_field()] |
| -- * [M.field()] |
| -- * [M.content()] |
| -- * [M.table()] |
| -- |
| -- KNOWN BUG: doesn't handle final ";" or "," before final "}" |
| -- |
| -------------------------------------------------------------------------------- |
| |
| local gg = require 'metalua.grammar.generator' |
| local mlp = require 'metalua.compiler.parser.common' |
| |
| local M = { } |
| |
| -------------------------------------------------------------------------------- |
| -- eta expansion to break circular dependencies: |
| -------------------------------------------------------------------------------- |
| local function _expr (lx) return mlp.expr(lx) end |
| |
| -------------------------------------------------------------------------------- |
| -- [[key] = value] table field definition |
| -------------------------------------------------------------------------------- |
| M.bracket_field = gg.sequence{ "[", _expr, "]", "=", _expr, builder = "Pair" } |
| |
| -------------------------------------------------------------------------------- |
| -- [id = value] or [value] table field definition; |
| -- [[key]=val] are delegated to [bracket_field()] |
| -------------------------------------------------------------------------------- |
| function M.field (lx) |
| if lx :is_keyword (lx :peek(), "[") then return M.bracket_field (lx) end |
| local e = _expr (lx) |
| if lx :is_keyword (lx :peek(), "=") then |
| lx :next(); -- skip the "=" |
| local key = mlp.id2string(e) |
| local val = _expr(lx) |
| local r = { tag="Pair", key, val } |
| r.lineinfo = { first = key.lineinfo.first, last = val.lineinfo.last } |
| return r |
| else return e end |
| end |
| |
| -------------------------------------------------------------------------------- |
| -- table constructor, without enclosing braces; returns a full table object |
| -------------------------------------------------------------------------------- |
| M.content = gg.list { |
| primary = function(...) return M.field(...) end, |
| separators = { ",", ";" }, |
| terminators = "}", |
| builder = "Table" } |
| |
| -------------------------------------------------------------------------------- |
| -- complete table constructor including [{...}] |
| -------------------------------------------------------------------------------- |
| M.table = gg.sequence{ "{", function(...) return M.content(...) end, "}", builder = unpack } |
| |
| return M |
