lexers/gettext.lua

   1 -- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
   2 -- Gettext LPeg lexer.
   3
   4 local l = require('lexer')
   5 local token, word_match = l.token, l.word_match
   6 local P, R, S = lpeg.P, lpeg.R, lpeg.S
   7
   8 local M = {_NAME = 'gettext'}
   9
  10 -- Whitespace.
  11 local ws = token(l.WHITESPACE, l.space^1)
  12
  13 -- Comments.
  14 local comment = token(l.COMMENT, '#' * S(': .~') * l.nonnewline^0)
  15
  16 -- Strings.
  17 local string = token(l.STRING, l.delimited_range('"', true))
  18
  19 -- Keywords.
  20 local keyword = token(l.KEYWORD, word_match({
  21   'msgid', 'msgid_plural', 'msgstr', 'fuzzy', 'c-format', 'no-c-format'
  22 }, '-', true))
  23
  24 -- Identifiers.
  25 local identifier = token(l.IDENTIFIER, l.word)
  26
  27 -- Variables.
  28 local variable = token(l.VARIABLE, S('%$@') * l.word)
  29
  30 M._rules = {
  31   {'whitespace', ws},
  32   {'comment', comment},
  33   {'string', string},
  34   {'keyword', keyword},
  35   {'identifier', identifier},
  36   {'variable', variable},
  37 }
  38
  39 return M