http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53843
Bug #: 53843
Summary: Macros following string literals don't expand in C++11
mode
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
The following works in C++98 and C++11 mode in GCC 4.4 and in C++98 mode in GCC
4.7 but breaks in C++11 mode in GCC 4.7:
#include <iostream>
#define bar
#define FOO "x"bar
int main()
{
std::cout << FOO << std::endl;
return 0;
}
The error given is:
pptest.cpp: In function ‘int main()’:
pptest.cpp:8:16: error: unable to find string literal operator ‘operator"" bar’
AFAIK this is not correct behavior. I wouldn't expect the preprocessor behavior
to change based on custom string literals being added to the language, but I
haven't been able to find anything either way by Googling. I think the bar to
expand to nothing so that just "x" is printed.
