使用类模板需要模板参数列表 [英] use of class template requires template argument list

问题描述

我从我的类中移出了方法实现并发现了以下错误:

I moved out the methods implementation from my class and caught the following error:

use of class template requires template argument list

对于方法来说根本不需要模板类型...(对于其他方法都可以)

for method whitch doesn't require template type at all... (for other methods all ok)

类

template<class T>
class MutableQueue
{
public:
    bool empty() const;
    const T& front() const;
    void push(const T& element);
    T pop();

private:
    queue<T> queue;
    mutable boost::mutex mutex;
    boost::condition condition;
};

错误的实现

template<>   //template<class T> also incorrect
bool MutableQueue::empty() const
{
    scoped_lock lock(mutex);
    return queue.empty();
}

推荐答案

应该是:

template<class T>
bool MutableQueue<T>::empty() const
{
    scoped_lock lock(mutex);
    return queue.empty();
}

如果您的代码很短，只需将其内联即可，因为无论如何您都无法将模板类的实现和标头分开.

And if your code is that short, just inline it, as you can't separate the implementation and header of a template class anyway.

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