Added optional Lua lexer support.

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

1 files changed, 51 insertions, 0 deletions

diff --git a/lexlua/idl.lua b/lexlua/idl.lua
new file mode 100644
index 000000000..cf2b6c8aa
--- /dev/null
+++ b/lexlua/idl.lua
@@ -0,0 +1,51 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- IDL LPeg lexer.
+
+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('idl')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  abstract attribute case const context custom default enum exception factory
+  FALSE in inout interface local module native oneway out private public raises
+  readonly struct support switch TRUE truncatable typedef union valuetype
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  any boolean char double fixed float long Object octet sequence short string
+  unsigned ValueBase void wchar wstring
+]]))
+
+-- 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))
+
+-- Preprocessor.
+local preproc_word = word_match[[
+  define undef ifdef ifndef if elif else endif include warning pragma
+]]
+lex:add_rule('preproc', token(lexer.PREPROCESSOR, lexer.starts_line('#') *
+                                                  preproc_word))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('!<>=+-/*%&|^~.,:;?()[]{}')))
+
+return lex