https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121739
Bug ID: 121739
Summary: Unicode character constants are not allowed to have
multiple characters in C23
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: luigighiron at gmail dot com
Target Milestone: ---
The following code is incorrectly accepted by GCC:
int main(){
u'ab';
}
This code violates the following constraint:
> A UTF-8, UTF-16, or UTF-32 character constant shall not contain more than one
> character.
Section 6.4.4.5 "Character constants" Paragraph 9 ISO/IEC 9899:2024
Before C23 no such constraint existed so it should still be valid there. Also
worth nothing that L'ab' is still valid in C despite being removed from C++.
