几行模板代码,算是"重载"还是算"特化"呢? 分不清了
VC2010支持的C++11的<functional>里面有下面的代码:

C/C++ code

template<int _Nx>    class _Ph    {    // placeholder    };template<class _Tx>    struct is_placeholder    {    // template to indicate that _Tx is not a placeholder    static const int value = 0;    };template<int _Nx>    struct is_placeholder<_Ph<_Nx> >    {    // template specialization to indicate that _Ph<_Nx> is a placeholder    static const int value = _Nx;    };

这里的两个is_placeholder，算是2个重载呢? 还是下面的<int _Nx>版本算是一个特化呢?
模板函数，怎么才算重载，怎么才算特化?
谢谢!

[解决办法]
主模板
template<class _Tx>
struct is_placeholder
{ // template to indicate that _Tx is not a placeholder
static const int value = 0;
};
特化
template<int _Nx> struct is_placeholder<_Ph<_Nx> > { // template specialization to indicate that _Ph<_Nx> is a placeholder static const int value = _Nx; };
[解决办法]

探讨

引用:
主模板
template<class _Tx>
struct is_placeholder
{ // template to indicate that _Tx is not a placeholder
static const int value = 0;
};
特化
template<int _Nx> struct is_placeholder<_P……