[Bug c++/106256] Custom diagnostics for unsatisfied standard concepts

[nshead at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106256

Nathaniel Shead <nshead at gcc dot gnu.org> changed:

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--- Comment #3 from Nathaniel Shead <nshead at gcc dot gnu.org> ---
In case it's at all helpful, I'd posted a WIP patch of one possible approach
for this a short while back (but I'd only mentioned it in PR117294, I didn't
find this bug report at the time):
https://gcc.gnu.org/pipermail/gcc-patches/2024-November/667976.html

Haven't done any further work on it though, and it's definitely not perfect; in
particular, it wouldn't be able to improve diagnostics of type traits that
aren't defined in terms of compiler builtins.