lexers/sass.lua

   1 -- Copyright 2006-2013 Robert Gieseke. See LICENSE.
   2 -- Sass CSS preprocessor LPeg lexer.
   3 -- http://sass-lang.com
   4
   5 local l = require('lexer')
   6 local token = l.token
   7 local P, S = lpeg.P, lpeg.S
   8
   9 local M = {_NAME = 'sass'}
  10
  11 -- Line comments.
  12 local line_comment = token(l.COMMENT, '//' * l.nonnewline^0)
  13
  14 -- Variables.
  15 local variable = token(l.VARIABLE, '$' * (l.alnum + S('_-'))^1)
  16
  17 -- Mixins.
  18 local mixin = token('mixin', P('@') * l.word)
  19
  20 local css = l.load('css')
  21 local _rules = css._rules
  22 table.insert(_rules, #_rules - 1, {'mixin', mixin})
  23 table.insert(_rules, #_rules - 1, {'line_comment', line_comment})
  24 table.insert(_rules, #_rules - 1, {'variable', variable})
  25 M._rules = _rules
  26
  27 M._tokenstyles = css._tokenstyles
  28 M._tokenstyles['mixin'] = l.STYLE_FUNCTION
  29
  30 M._foldsymbols = css._foldsymbols
  31
  32 return M