Added optional Lua lexer support.

This support is disabled by default and must be enabled via compile-time option.

1 files changed, 66 insertions, 0 deletions

diff --git a/lexlua/java.lua b/lexlua/java.lua
new file mode 100644
index 000000000..a85bf154e
--- /dev/null
+++ b/lexlua/java.lua
@@ -0,0 +1,66 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Java LPeg lexer.
+-- Modified by Brian Schott.
+
+local lexer = require('lexer')
+local token, word_match = lexer.token, lexer.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local lex = lexer.new('java')
+
+-- Whitespace.
+local ws = token(lexer.WHITESPACE, lexer.space^1)
+lex:add_rule('whitespace', ws)
+
+-- Classes.
+lex:add_rule('classdef', token(lexer.KEYWORD, P('class')) * ws *
+                         token(lexer.CLASS, lexer.word))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.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.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  boolean byte char double float int long short void
+  Boolean Byte Character Double Float Integer Long Short String
+]]))
+
+-- Functions.
+lex:add_rule('function', token(lexer.FUNCTION, lexer.word) * #P('('))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'", true) +
+                                           lexer.delimited_range('"', true)))
+
+-- Comments.
+local line_comment = '//' * lexer.nonnewline_esc^0
+local block_comment = '/*' * (lexer.any - '*/')^0 * P('*/')^-1
+lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
+
+-- Numbers.
+lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) *
+                                           S('LlFfDd')^-1))
+
+-- Annotations.
+lex:add_rule('annotation', token('annotation', '@' * lexer.word))
+lex:add_style('annotation', lexer.STYLE_PREPROCESSOR)
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}')))
+
+-- Fold points.
+lex:add_fold_point(lexer.OPERATOR, '{', '}')
+lex:add_fold_point(lexer.COMMENT, '/*', '*/')
+lex:add_fold_point(lexer.COMMENT, '//', lexer.fold_line_comments('//'))
+
+return lex