[Bug c++/53690] [C++11] \u0000 and \U00000000 are wrongly encoded as U+0001.

["steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53690

--- Comment #3 from Steven Bosscher <steven at gcc dot gnu.org> 2012-07-08 20:23:40 UTC ---
Test case:

$ cat testsuite/g++.dg/pr53690.C
// { dg-do compile }
// { dg-options "-std=c++11" }

extern "C" int printf (__const char *__restrict __format, ...);

typedef unsigned short uint16_t;
typedef unsigned int uint32_t;

int main() {
    uint32_t a = U'\U00000000';
    uint32_t b = U'\u0000';
    uint32_t c = U'\x00';
    uint32_t d = U'\0';

    uint16_t e = u'\U00000000';
    uint16_t f = u'\u0000';
    uint16_t g = u'\x00';
    uint16_t h = u'\0';

    printf("%x %x %x %x %x %x %x %x\n", a, b, c, d, e, f, g, h);

    return 0;
}

// { dg-final { scan-tree-dump-not "= 1" "original" } }