C++ 模板错误:没有用于调用 std::vector<int, std::allocator<int> 的匹配函数&gt;

问题描述

我无法弄清楚为什么我收到以下代码的错误:

I can't manage to figure out why I get an error for the following code:

template <typename T>
class Test{
    void foo(vector<T>& v);
};

template <typename T>
void Test<T>::foo(vector<T>& v){
    //DO STUFF
}

int main(){
      Test<int> t;
      t.foo(vector<int>());
}

这是错误:

main.cpp: In function ‘int main()’:
main.cpp:21:21: error: no matching function for call to ‘Test<int>::foo(std::vector<int, std::allocator<int> >)’
main.cpp:21:21: note: candidate is:
main.cpp:14:6: note: void Test<T>::foo(std::vector<T>&) [with T = int]
main.cpp:14:6: note:   no known conversion for argument 1 from ‘std::vector<int, std::allocator<int> >’ to ‘std::vector<int, std::allocator<int> >&’

我做错了什么?

推荐答案

您不能将临时对象绑定到非 const 引用.

You can't bind a temporary to a non-const reference.

要么将您的签名更改为:

Either change your signature to:

void foo(vector<T> const& v);

或者不传递一个临时的:

or don't pass a temporary:

vector<int> temp;
t.foo(temp);

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