[Bug c++/109877] need to accept invalid tokens for balanced token sequences in attribute arguments

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109877

--- Comment #15 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Try:
```
double t = 10.1.1;
```

clang rejects this NOT by a syntax error but via a tokeniziing error:
<source>:1:16: error: invalid suffix '.1' on floating constant