-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
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-- Props LPeg lexer.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S = lpeg.P, lpeg.R, lpeg.S
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local lex = lexer.new('props', {lex_by_line = true})
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-- Whitespace.
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lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
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-- Colors.
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lex:add_rule('color', token('color', '#' * lexer.xdigit * lexer.xdigit *
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lexer.xdigit * lexer.xdigit *
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lexer.xdigit * lexer.xdigit))
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lex:add_style('color', lexer.STYLE_NUMBER)
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-- Comments.
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lex:add_rule('comment', token(lexer.COMMENT, '#' * lexer.nonnewline^0))
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-- Equals.
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lex:add_rule('equals', token(lexer.OPERATOR, '='))
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-- Strings.
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lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'") +
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lexer.delimited_range('"')))
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-- Variables.
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lex:add_rule('variable', token(lexer.VARIABLE, '$(' * (lexer.any - ')')^1 *
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')'))
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return lex
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