Compiler Error C2297

 

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The latest version of this topic can be found at Compiler Error C2297.

operator' : bad right operand

The right operand used with operator is invalid.

For example, the compiler may see a declaration where you intended a function call.

The following sample generates C2297:

// C2297.cpp  
struct MyStruct {  
   struct Help {  
      Help(float f) : m_f(f) {}  
      float m_f;  
   };  
  
   MyStruct(const Help &h) : m_f(h.m_f) {}  
  
   MyStruct(float f) : m_f(f) {}  
  
   MyStruct operator*(const MyStruct &f1) const {   
      return MyStruct(m_f * f1.m_f);  
   }  
  
private:  
   float m_f;  
};  
  
int main() {  
   float f1 = 1.0f;  
  
   MyStruct m_MyStruct1 ( MyStruct::Help( f1 ) );  
   // try the following line instead  
   // MyStruct m_MyStruct1 = MyStruct::Help( f1 );  
  
   MyStruct m_MyStruct2 ( MyStruct::Help( f1 ) );  
   // try the following line instead  
   // MyStruct m_MyStruct2 = MyStruct::Help( f1 );  
  
   MyStruct m_MyStruct3 = m_MyStruct1 * m_MyStruct2;   // C2297  
}  

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