[Bug c++/68434] [concepts] ICE: same canonical type node for different types

Casey at Carter dot net gcc-bugzilla@gcc.gnu.org
Sun Nov 29 04:03:00 GMT 2015


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68434

Casey Carter <Casey at Carter dot net> changed:

           What    |Removed                     |Added
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                 CC|                            |Casey at Carter dot net

--- Comment #4 from Casey Carter <Casey at Carter dot net> ---
> I hit the issue today when compiling the cmcstl2 lib.

If you want to see ICEs from deduction constraints, change the "#if 0" to 1 on
line 83 of include/stl2/detail/fwd.hpp so that the STL2_DEDUCTION_CONSTRAINT
macro emits actual deduction constraint syntax instead of "requires
Concept<decltype(expression), ...>". I've had to avoid deduction constraints
completely to get compiling code.

I'm not complaining - C++11/14 bugs *should* take priority over [concepts] -
but I would be willing to buy beer for whomever fixes the deduction constraint
bugs so that I could stop using the preprocessor.


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