https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105111
Bug ID: 105111
Summary: Ambiguous constructor overload with requires
constraint
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: andrei.popa105 at yahoo dot com
Target Milestone: ---
Let's consider the following code:
#include <iostream>
#include <type_traits>
struct S {
template <typename T> explicit S(T) noexcept requires
std::is_signed<T>::value {
std::cout << "T\n";
}
template<typename T> explicit S(const T&) noexcept {
std::cout << "const T&\n";
}
};
int main() {
S s(4);
}
To compile this code I used the following command and I provide also a link to
a godbolt instance:
g++ -std=c++23 example.cpp -o example
https://godbolt.org/z/vaGafvKcT
This code doesn't compile with gcc 12.0.
I think this is a bug because the most constrained constructor is the first one
and has a matching requires clause when we create the s object.
