C++ “X 不是模板”错误
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/6970219/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
'X is not a template' error
提问by jww
I'm having trouble declaring a template class. I've tried an number of ill-readable and non-sensical combinations.
我在声明模板类时遇到问题。我尝试了许多难以阅读和无意义的组合。
template <class C, class M >
class BlockCipherGenerator : public KeyGenerator
{
...
private:
M < C > m_cipher;
};
And
和
template <class C, class M >
class BlockCipherGenerator : public KeyGenerator
{
typedef typename C::value_type CIPHER;
typedef typename M::value_type MODE;
private:
MODE < CIPHER > m_cipher;
};
回答by Lightness Races in Orbit
It's what it says.
这就是它所说的。
Your template parameter list says that M
is a class
, not a template
.
您的模板参数列表说那M
是 a class
,而不是 atemplate
。
If you say that it's a class template, then everything's fine:
如果你说它是一个类模板,那么一切都很好:
template <class C, template <class C> class M>
class BlockCipherGenerator : public KeyGenerator
{
M<C> m_cipher;
};
Remember, something like std::vector
is nota class, but a class template. Something like std::vector<int>
is a class (type).
请记住,类似std::vector
是不是一个类,而是一个类模板。类似的东西std::vector<int>
是一个类(类型)。