Question

我想创建一个类似于std :: cout的类。我知道如何重载＆gt;＆gt;和＆lt;＆lt;运营商，但我想重载＆lt;＆lt;运算符所以它将是输入，就像在std :: cout中一样。

应该是这样的：

class MyClass
{
   std::string mybuff;
 public:
   //friend std::???? operator<<(????????, MyClass& myclass)
   {
   }
}
.
.
.

  MyClass class;
    class << "this should be stored in my class" << "concatenated with this" << 2 << "(too)";

由于

Answer 1

class MyClass
{
    std::string mybuff;
 public:
    //replace Whatever with what you need
    MyClass& operator << (const Whatever& whatever)
    {
       //logic
       return *this;
    }

    //example:
    MyClass& operator << (const char* whatever)
    {
       //logic
       return *this;
    }
    MyClass& operator << (int whatever)
    {
       //logic
       return *this;
    }
};

Answer 2

我认为最常见的答案是：

class MyClass
{
   std::string mybuff;
 public:
   template<class Any>
   MyClass& operator<<(const Any& s)
   {
          std::stringstream strm;
          strm << s;
          mybuff += strm.str();
   }

   MyClass& operator<<( std::ostream&(*f)(std::ostream&) )
   {
    if( f == std::endl )
    {
        mybuff +='\n';
    }
    return *this;
}
}

std :: endl是从Timbo的回答here

中粘贴的

感谢您的回答！

重载运算符＆gt;＆gt;像std :: cout

2 个答案: