[Bug c++/108911] 0xe+100 gives talks about an impossible literal operator in error message

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108911

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note clang has a decent error message for `0xe+100` but has just as bad one for
`123_to.`

Full testcase for a few:
```
  int a = 0xe+100;
  int b = 123_to.;
  int c = 0xe_100e+10;
```