https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81139
Bug ID: 81139
Summary: Non-deduced return type in abbreviated function
template
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: andrew.n.sutton at gmail dot com
Target Milestone: ---
When a constrained-type-specifier is the same as that of a parameter type, the
return type is not deduced.
template<typename T> concept bool C = true;
C f(C) { return 0; }
void g() {
auto x = f("x");
static_assert(std::is_same<decltype(x), int>::value);
}
The static assertion should fail.
