[求助]重载流运算符+模板,有编译错误
我写了几行程序，重载ostream来输出一个deque容器的内容。VC下编译不过。

C/C++ code

#include <iostream> #include <deque> using namespace std; template< typename T > ostream& operator<<( ostream, const deque< T >& collection ) {      for( auto it = collection.begin(); it != collection.end(); ++ it )      {          strm << *it;     }      return strm; } int _tmain(int argc, _TCHAR* argv[]) {      deque<int> di;      di.push_back(1);      di.push_back(2);      cout<<di<<endl;      return 0; } 

C/C++ code

#include <iostream> #include <deque> using namespace std; template< typename T > ostream& operator<<( ostream &strm, const deque< T >& collection ) {      for( typename deque<T>::const_iterator it = collection.begin(); it != collection.end(); ++ it )      {          strm << *it;     }      return strm; } int main() {      deque<int> di;      di.push_back(1);      di.push_back(2);      cout<<di<<endl;  system("pause"); return 0; }