-- Copyright 2006-2018 Robert Gieseke. See License.txt.
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-- Sass CSS preprocessor LPeg lexer.
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-- http://sass-lang.com
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local lexer = require('lexer')
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local token = lexer.token
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local P, S = lpeg.P, lpeg.S
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local lex = lexer.new('sass', {inherit = lexer.load('css')})
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-- Line comments.
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lex:add_rule('line_comment', token(lexer.COMMENT, '//' * lexer.nonnewline^0))
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-- Variables.
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lex:add_rule('variable', token(lexer.VARIABLE, '$' * (lexer.alnum + S('_-'))^1))
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-- Mixins.
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lex:add_rule('mixin', token('mixin', P('@') * lexer.word))
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lex:add_style('mixin', lexer.STYLE_FUNCTION)
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-- Fold points.
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lex:add_fold_point(lexer.COMMENT, '//', lexer.fold_line_comments('//'))
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return lex
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