60 lines
2.1 KiB
Lua
60 lines
2.1 KiB
Lua
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-- Copyright 2006-2019 Mitchell mitchell.att.foicica.com. See License.txt.
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-- Actionscript 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('actionscript')
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-- Whitespace.
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lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
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-- Keywords.
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lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
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break continue delete do else for function if in new on return this typeof var
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void while with NaN Infinity false null true undefined
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-- Reserved for future use.
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abstract case catch class const debugger default export extends final finally
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goto implements import instanceof interface native package private Void
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protected public dynamic static super switch synchonized throw throws
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transient try volatile
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]]))
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-- Types.
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lex:add_rule('type', token(lexer.TYPE, word_match[[
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Array Boolean Color Date Function Key MovieClip Math Mouse Number Object
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Selection Sound String XML XMLNode XMLSocket
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-- Reserved for future use.
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boolean byte char double enum float int long short
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]]))
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-- Identifiers.
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lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
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-- Strings.
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local sq_str = lexer.delimited_range("'", true)
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local dq_str = lexer.delimited_range('"', true)
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local ml_str = '<![CDATA[' * (lexer.any - ']]>')^0 * ']]>'
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lex:add_rule('string', token(lexer.STRING, sq_str + dq_str + ml_str))
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-- Comments.
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local line_comment = '//' * lexer.nonnewline^0
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local block_comment = '/*' * (lexer.any - '*/')^0 * P('*/')^-1
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lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
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-- Numbers.
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lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) *
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S('LlUuFf')^-2))
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-- Operators.
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lex:add_rule('operator', token(lexer.OPERATOR, S('=!<>+-/*%&|^~.,;?()[]{}')))
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-- Fold points.
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lex:add_fold_point(lexer.OPERATOR, '{', '}')
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lex:add_fold_point(lexer.COMMENT, '/*', '*/')
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lex:add_fold_point(lexer.COMMENT, '//', lexer.fold_line_comments('//'))
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lex:add_fold_point(lexer.STRING, '<![CDATA[', ']]>')
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return lex
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