这是编译器的bug吗?
template <typename T>
T& operator++(T& t)
{
return t;
}
namespace asdf {
enum Foo { };
enum Bar { };
Foo& operator++(Foo& foo);
void fun()
{
Bar bar;
++bar;
}
} // end namespace asdf
int main()
{
return 0;
}
GCC 4.7的错误信息如下:
error: no match for 'operator++' in '++bar'
note: candidate is:
note: asdf::Foo& asdf::operator++(asdf::Foo&)
note: no known conversion for argument 1 from 'asdf::Bar' to 'asdf::Foo&'
如果您注释掉这一行,它就可以编译:
Foo& operator++(Foo& foo);