Import LPeg based lexers from Scintillua 3.6.1-1

These are Copyright (c) 2007-2015 Mitchell and released under the
MIT license.

1 files changed, 86 insertions, 0 deletions

diff --git a/lexers/java.lua b/lexers/java.lua
new file mode 100644
index 0000000..a94ae6d
--- /dev/null
+++ b/lexers/java.lua
@@ -0,0 +1,86 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Java LPeg lexer.
+-- Modified by Brian Schott.
+
+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 = 'java'}
+
+-- 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("'", true)
+local dq_str = l.delimited_range('"', true)
+local string = token(l.STRING, sq_str + dq_str)
+
+-- Numbers.
+local number = token(l.NUMBER, (l.float + l.integer) * S('LlFfDd')^-1)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'abstract', 'assert', 'break', 'case', 'catch', 'class', 'const', 'continue',
+  'default', 'do', 'else', 'enum', 'extends', 'final', 'finally', 'for', 'goto',
+  'if', 'implements', 'import', 'instanceof', 'interface', 'native', 'new',
+  'package', 'private', 'protected', 'public', 'return', 'static', 'strictfp',
+  'super', 'switch', 'synchronized', 'this', 'throw', 'throws', 'transient',
+  'try', 'while', 'volatile',
+  -- Literals.
+  'true', 'false', 'null'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'boolean', 'byte', 'char', 'double', 'float', 'int', 'long', 'short', 'void',
+  'Boolean', 'Byte', 'Character', 'Double', 'Float', 'Integer', 'Long', 'Short',
+  'String'
+})
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}'))
+
+-- Annotations.
+local annotation = token('annotation', '@' * l.word)
+
+-- Functions.
+local func = token(l.FUNCTION, l.word) * #P('(')
+
+-- Classes.
+local class_sequence = token(l.KEYWORD, P('class')) * ws^1 *
+                       token(l.CLASS, l.word)
+
+M._rules = {
+  {'whitespace', ws},
+  {'class', class_sequence},
+  {'keyword', keyword},
+  {'type', type},
+  {'function', func},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'annotation', annotation},
+  {'operator', operator},
+}
+
+M._tokenstyles = {
+  annotation = l.STYLE_PREPROCESSOR
+}
+
+M._foldsymbols = {
+  _patterns = {'[{}]', '/%*', '%*/', '//'},
+  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
+  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
+}
+
+return M