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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/81139] Non-deduced return type in abbreviated function
 template
Date: Fri, 13 Aug 2021 08:52:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D81139

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Is this true?

With the following updated C++20 testcase, clang, GCC and MSVC all cause the
static_assert to pass:
#include <type_traits>

template<typename T> concept C =3D true;

C auto f(C auto) { return 0; }

void g() {
  auto x =3D f("x");
  static_assert(std::is_same<decltype(x), int>::value);
}=