-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
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-- Groovy 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('groovy')
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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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abstract break case catch continue default do else extends final finally for
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if implements instanceof native new private protected public return static
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switch synchronized throw throws transient try volatile while strictfp package
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import as assert def mixin property test using in
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false null super this true it
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]]))
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-- Functions.
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lex:add_rule('function', token(lexer.FUNCTION, word_match[[
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abs any append asList asWritable call collect compareTo count div dump each
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eachByte eachFile eachLine every find findAll flatten getAt getErr getIn
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getOut getText grep immutable inject inspect intersect invokeMethods isCase
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join leftShift minus multiply newInputStream newOutputStream newPrintWriter
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newReader newWriter next plus pop power previous print println push putAt read
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readBytes readLines reverse reverseEach round size sort splitEachLine step
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subMap times toInteger toList tokenize upto waitForOrKill withPrintWriter
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withReader withStream withWriter withWriterAppend write writeLine
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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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boolean byte char class double float int interface long short void
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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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-- Comments.
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local line_comment = '//' * lexer.nonnewline_esc^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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-- Strings.
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local sq_str = lexer.delimited_range("'")
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local dq_str = lexer.delimited_range('"')
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local triple_sq_str = "'''" * (lexer.any - "'''")^0 * P("'''")^-1
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local triple_dq_str = '"""' * (lexer.any - '"""')^0 * P('"""')^-1
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local regex_str = #P('/') * lexer.last_char_includes('=~|!<>+-*?&,:;([{') *
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lexer.delimited_range('/', true)
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lex:add_rule('string', token(lexer.STRING, triple_sq_str + triple_dq_str +
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sq_str + dq_str) +
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token(lexer.REGEX, regex_str))
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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.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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return lex
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