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| -- Copyright 2006-2018 Robert Gieseke. See License.txt.
| -- Lilypond LPeg lexer.
| -- TODO Embed Scheme; Notes?, Numbers?
|
| local lexer = require('lexer')
| local token, word_match = lexer.token, lexer.word_match
| local P, R, S = lpeg.P, lpeg.R, lpeg.S
|
| local lex = lexer.new('lilypond')
|
| -- Whitespace.
| lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
|
| -- Keywords, commands.
| lex:add_rule('keyword', token(lexer.KEYWORD, '\\' * lexer.word))
|
| -- Identifiers.
| lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
|
| -- Strings.
| lex:add_rule('string', token(lexer.STRING,
| lexer.delimited_range('"', false, true)))
|
| -- Comments.
| -- TODO: block comment.
| lex:add_rule('comment', token(lexer.COMMENT, '%' * lexer.nonnewline^0))
|
| -- Operators.
| lex:add_rule('operator', token(lexer.OPERATOR, S("{}'~<>|")))
|
| return lex
|
|
