From a4a7127dadf79ebf0deacf49f70ed9e588c40596 Mon Sep 17 00:00:00 2001
From: yaroslav-o <29219583+yaroslav-o@users.noreply.github.com>
Date: Wed, 25 Sep 2019 05:44:54 -0700
Subject: Recognize integer multicharacter constants like 'ABCD' (#350)

Recognize integer multicharacter constants like 'ABCD'

The feature I am adding is defined here - 5th case.
https://en.cppreference.com/w/c/language/character_constant
Also here: 6.4.4.4.10 of C99.

Put simply, pycparser thought a statement like this is an error:
int a = 'ABCD';
However it is not.

It is likely possible to just modify char_const regular expression in c_lexer.py:240 to allow longer characters, but the way it is done in this PR - multicharacter constants are clearly separated. I am also limiting the length of multicharacter const integers to 4 characters - this matches VS compiler behavior (gcc allows any length with a warning) and lets pycparser NOT consider lengthy single-quoted strings as integers - these would be nonsensical anyway.
---
 pycparser/c_parser.py | 1 +
 1 file changed, 1 insertion(+)

(limited to 'pycparser/c_parser.py')

diff --git a/pycparser/c_parser.py b/pycparser/c_parser.py
index 87d6c5e..4cf96fa 100644
--- a/pycparser/c_parser.py
+++ b/pycparser/c_parser.py
@@ -1766,6 +1766,7 @@ class CParser(PLYParser):
                         | INT_CONST_OCT
                         | INT_CONST_HEX
                         | INT_CONST_BIN
+                        | INT_CONST_CHAR
         """
         uCount = 0
         lCount = 0
-- 
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