相关疑难解决方法(0)

当我偶然发现这个问题时,我正在尝试使用C++ 0x可变参数模板:

template < typename ...Args >
struct identities
{
    typedef Args type; //compile error: "parameter packs not expanded with '...'
};

//The following code just shows an example of potential use, but has no relation
//with what I am actually trying to achieve.
template < typename T >
struct convert_in_tuple
{
    typedef std::tuple< typename T::type... > type;
};

typedef convert_in_tuple< identities< int, float > >::type int_float_tuple;

当我尝试输入模板参数包时,GCC 4.5.0给出了一个错误.

基本上,我想将参数包"存储"在typedef中,而无需解压缩.可能吗？如果没有,是否有一些理由不允许这样做？