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-- Copyright 2006-2019 Robert Gieseke. See License.txt.
-- Sass CSS preprocessor LPeg lexer.
-- http://sass-lang.com
local lexer = require('lexer')
local token = lexer.token
local P, S = lpeg.P, lpeg.S
local lex = lexer.new('sass', {inherit = lexer.load('css')})
-- Line comments.
lex:add_rule('line_comment', token(lexer.COMMENT, '//' * lexer.nonnewline^0))
-- Variables.
lex:add_rule('variable', token(lexer.VARIABLE, '$' * (lexer.alnum + S('_-'))^1))
-- Mixins.
lex:add_rule('mixin', token('mixin', P('@') * lexer.word))
lex:add_style('mixin', lexer.STYLE_FUNCTION)
-- Fold points.
lex:add_fold_point(lexer.COMMENT, '//', lexer.fold_line_comments('//'))
return lex
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