C++模板错误:没有匹配函数用于调用std :: vector <int,std :: allocator <int >>

Question

我无法弄清楚为什么我得到以下代码的错误:

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> >&’

我究竟做错了什么？

Answer 1

您不能将临时绑定到非const引用.

将您的签名更改为:

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

或者不通过临时的:

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