From 63312643ed52032ad9516533279c6b946478f562 Mon Sep 17 00:00:00 2001
From: mitchell <unknown>
Date: Tue, 4 Jun 2019 18:08:37 -0400
Subject: lexlua: Support single quotes in C++14 integer literals.

---
 lexlua/cpp.lua | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'lexlua/cpp.lua')

diff --git a/lexlua/cpp.lua b/lexlua/cpp.lua
index b38e0120e..91a04f650 100644
--- a/lexlua/cpp.lua
+++ b/lexlua/cpp.lua
@@ -46,7 +46,11 @@ 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))
+local dec = lexer.digit^1 * ("'" * lexer.digit^1)^0
+local hex = '0' * S('xX') * lexer.xdigit^1 * ("'" * lexer.xdigit^1)^0
+local bin = '0' * S('bB') * S('01')^1 * ("'" * S('01')^1)^0
+local integer = S('+-')^-1 * (hex + bin + dec)
+lex:add_rule('number', token(lexer.NUMBER, lexer.float + integer))
 
 -- Preprocessor.
 local preproc_word = word_match[[
-- 
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