[Bug c++/67499] c++ template/overload diagnostic compression

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67499

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(we were chatting on IRC, I suggested Frank file this)

It might be worth looking at Clang for inspiration; see e.g.:
  http://clang.llvm.org/diagnostics.html  ("Template Type Diffing")
though that's not quite the same thing.