ambiguous call to overloaded function - int and intamp;(对重载函数的模糊调用 - int 和 intamp;)
问题描述
void g(int& a)
{
std::cout<<"int&
";
}
void g(int a)
{
std::cout<<"int
";
}
int main()
{
int a = 2;
g(a); //won't compile (at least under MSVC 2012)
std::cin.ignore();
}
这里有没有办法避免模棱两可的调用错误?类似于 g( static_cast
Is there a way to avoid ambiguous call error here ? something like g( static_cast<int&>(a) );
推荐答案
如果你可以投射,当然有一种方法来消除这个调用的歧义:
If you can cast, there is, of course a way to disambiguate the call:
g(const_cast<int const&>(a));
如果你坚持调用参考版本,解决方法就有点棘手了:
If you insist to call the reference version, the resolution is a bit more tricky:
static_cast<void(*)(int&)>(g)(a);
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