https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93415
Bug ID: 93415
Summary: Previous declaration of template without default
arguments leads to incorrect overload resolution
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Predelnik at gmail dot com
Target Milestone: ---
#include <iostream>
template <bool B>
void f (int);
template <bool B = true>
void f (int)
{
std::cout << "correct - int\n";
}
template <bool B = true>
void f (char)
{
std::cout << "wrong - char\n";
}
int main ()
{
f (0);
return 0;
}
The above program prints "wrong - char" with gcc, however just removing
declartion of `f` without default arguments leads to expected result. It is
very annoying issue because do-nothing forward declarations may lead to
unexpected hard to find bugs. Other compilers seem to handle this case
properly.
