-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
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-- Applescript 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('applescript')
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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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script property prop end copy to set global local on to of in given with
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without return continue tell if then else repeat times while until from exit
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try error considering ignoring timeout transaction my get put into is
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-- References.
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each some every whose where id index first second third fourth fifth sixth
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seventh eighth ninth tenth last front back st nd rd th middle named through
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thru before after beginning the
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-- Commands.
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close copy count delete duplicate exists launch make move open print quit
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reopen run save saving
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-- Operators.
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div mod and not or as contains equal equals isn't
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]], true))
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-- Constants.
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lex:add_rule('constant', token(lexer.CONSTANT, word_match[[
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case diacriticals expansion hyphens punctuation
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-- Predefined variables.
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it me version pi result space tab anything
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-- Text styles.
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bold condensed expanded hidden italic outline plain shadow strikethrough
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subscript superscript underline
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-- Save options.
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ask no yes
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-- Booleans.
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false true
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-- Date and time.
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weekday monday mon tuesday tue wednesday wed thursday thu friday fri saturday
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sat sunday sun month january jan february feb march mar april apr may june jun
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july jul august aug september sep october oct november nov december dec
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minutes hours days weeks
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]], true))
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-- Identifiers.
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lex:add_rule('identifier', token(lexer.IDENTIFIER, (lexer.alpha + '_') *
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lexer.alnum^0))
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-- Strings.
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lex:add_rule('string', token(lexer.STRING, lexer.delimited_range('"', true)))
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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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-- 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.COMMENT, '(*', '*)')
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return lex
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