Re: [PATCH] c++: follow DR 2386 and update implementation of get_tuple_size [PR110216]

[Jason Merrill via Gcc-patches]

On 8/6/23 14:15, gnaggnoyil wrote:
DR 2386 updated the tuple_size requirements for structured binding and
it now requires tuple_size to be considered only if
std::tuple_size<TYPE> names a complete class type with member value. GCC
before this patch does not follow the updated requrements, and this
patch is intended to implement it.
        DR 2386
        PR c++/110216

gcc/cp/ChangeLog:

        * decl.cc (get_tuple_size): Update implemetation to follow DR 2386.

gcc/testsuite/ChangeLog:

        * g++.dg/cpp1z/pr110216.C: New test.

Thanks!  Unfortunately, I see that this patch causes a testsuite failure 
in cpp1z/decomp10.C.  This seems to be an intended change of behavior, 
but please also update that testcase, and remember to run the testsuite 
before submitting a patch.

Jason