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-- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
-- Groovy LPeg lexer.
local l = require('lexer')
local token, word_match = l.token, l.word_match
local P, R, S = lpeg.P, lpeg.R, lpeg.S
local M = {_NAME = 'groovy'}
-- Whitespace.
local ws = token(l.WHITESPACE, l.space^1)
-- Comments.
local line_comment = '//' * l.nonnewline_esc^0
local block_comment = '/*' * (l.any - '*/')^0 * P('*/')^-1
local comment = token(l.COMMENT, line_comment + block_comment)
-- Strings.
local sq_str = l.delimited_range("'")
local dq_str = l.delimited_range('"')
local triple_sq_str = "'''" * (l.any - "'''")^0 * P("'''")^-1
local triple_dq_str = '"""' * (l.any - '"""')^0 * P('"""')^-1
local regex_str = #P('/') * l.last_char_includes('=~|!<>+-*?&,:;([{') *
l.delimited_range('/', true)
local string = token(l.STRING, triple_sq_str + triple_dq_str + sq_str +
dq_str) +
token(l.REGEX, regex_str)
-- Numbers.
local number = token(l.NUMBER, l.float + l.integer)
-- Keywords.
local keyword = token(l.KEYWORD, word_match{
'abstract', 'break', 'case', 'catch', 'continue', 'default', 'do', 'else',
'extends', 'final', 'finally', 'for', 'if', 'implements', 'instanceof',
'native', 'new', 'private', 'protected', 'public', 'return', 'static',
'switch', 'synchronized', 'throw', 'throws', 'transient', 'try', 'volatile',
'while', 'strictfp', 'package', 'import', 'as', 'assert', 'def', 'mixin',
'property', 'test', 'using', 'in',
'false', 'null', 'super', 'this', 'true', 'it'
})
-- Functions.
local func = token(l.FUNCTION, word_match{
'abs', 'any', 'append', 'asList', 'asWritable', 'call', 'collect',
'compareTo', 'count', 'div', 'dump', 'each', 'eachByte', 'eachFile',
'eachLine', 'every', 'find', 'findAll', 'flatten', 'getAt', 'getErr', 'getIn',
'getOut', 'getText', 'grep', 'immutable', 'inject', 'inspect', 'intersect',
'invokeMethods', 'isCase', 'join', 'leftShift', 'minus', 'multiply',
'newInputStream', 'newOutputStream', 'newPrintWriter', 'newReader',
'newWriter', 'next', 'plus', 'pop', 'power', 'previous', 'print', 'println',
'push', 'putAt', 'read', 'readBytes', 'readLines', 'reverse', 'reverseEach',
'round', 'size', 'sort', 'splitEachLine', 'step', 'subMap', 'times',
'toInteger', 'toList', 'tokenize', 'upto', 'waitForOrKill', 'withPrintWriter',
'withReader', 'withStream', 'withWriter', 'withWriterAppend', 'write',
'writeLine'
})
-- Types.
local type = token(l.TYPE, word_match{
'boolean', 'byte', 'char', 'class', 'double', 'float', 'int', 'interface',
'long', 'short', 'void'
})
-- Identifiers.
local identifier = token(l.IDENTIFIER, l.word)
-- Operators.
local operator = token(l.OPERATOR, S('=~|!<>+-/*?&.,:;()[]{}'))
M._rules = {
{'whitespace', ws},
{'keyword', keyword},
{'function', func},
{'type', type},
{'identifier', identifier},
{'comment', comment},
{'string', string},
{'number', number},
{'operator', operator},
}
M._foldsymbols = {
_patterns = {'[{}]', '/%*', '%*/', '//'},
[l.OPERATOR] = {['{'] = 1, ['}'] = -1},
[l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
}
return M
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