On Mon, 12 May 2014, Ed Smith-Rowland wrote:
> This patch is really a libcpp patch. But UDLs are like that ;-)
>
> Add string user-defined literals and char user-defined literals to the list of
> things to look out for while escaping strings in macro args.
>
> I'm not sure how to test this really. we want to write out *.ii files and
> verify that internal quotes are escaped.
You should be able to check the results of stringizing twice, e.g.:
extern "C" int strcmp (const char *, const char *);
extern "C" void abort (void);
extern "C" void exit (int);
void operator "" _s(const char *, unsigned long)
{
}
#define QUOTE(s) #s
#define QQUOTE(s) QUOTE(s)
const char *s = QQUOTE(QUOTE("hello"_s));
const char *t = QUOTE("\"hello\"_s");
int main()
{
if (strcmp(s, t) == 0)
exit(0);
else
abort();
}
(at least, this fails for me with unmodified GCC, and I think it should
pass).
--
Joseph S. Myers
jos...@codesourcery.com
