https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100963
Bug ID: 100963
Summary: GCC 11 regression: templated constructor with
std::initializer_list<T> is not selected
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: j.l.k at gmx dot com
Target Milestone: ---
Consider the following program (preprocessed source is attached):
```
#include <iostream>
struct A
{
explicit A(int)
{
std::cout << "A(int) constructor called" << std::endl;
}
A(std::initializer_list<int>)
{
std::cout << "A's constructor with initializer_list called" <<
std::endl;
}
};
struct B
{
explicit B(int)
{
std::cout << "B(int) constructor called" << std::endl;
}
template<typename T>
B(std::initializer_list<T>)
{
std::cout << "B's constructor with initializer_list called" <<
std::endl;
}
};
int main()
{
A({0});
B({0});
}
```
When compiled with GCC 11 (`g++ -std=c++14
gcc11_initializer_list_constructor.cpp -o gcc11_initializer_list_constructor`),
the program gives the following output:
A's constructor with initializer_list called
B(int) constructor called
Whereas with GCC 10 it produced this as expected:
A's constructor with initializer_list called
B's constructor with initializer_list called
Tested with GCC 11.1.0 from Arch Linux, the PKGBUILD is located here:
https://github.com/archlinux/svntogit-packages/blob/92c91ef891e9e2ed48f7f75921eb6321a2c7947d/trunk/PKGBUILD
