How can I properly overload the << operator for an ostream?
The function will be automatically targeted into the surrounding namespace Math (even though its definition appears within the scope of that class) but will not be visible unless you call …
What are the basic rules and idioms for operator overloading?
Dec 12, 2010 · The Three Basic Rules of Operator Overloading in C++. When it comes to operator overloading in C++, there are three basic rules you should follow. As with all such …
C++ -- How to overload operator+=? - Stack Overflow
The signature of any of the assignment operators (operator= or operator @= for your favorite operator @) should be. Class& operator @= (const Class& rhs); That is, the function takes its …
What's the right way to overload operator== for a class hierarchy?
bool operator==(const B& lhs, const B& rhs) { return lhs.isEqual( rhs ) && lhs.bar == rhs.bar; } By avoiding having an operator== that works on abstract base classes and keeping compare …
c++ - Overloading member access operators ... - Stack Overflow
The attributes and restrictions found in the rest of this subclause do not apply to them unless explicitly stated in 3.7.4.) But overloading unary & or binary &&, ||, or ,, or adding overloads of …
Overloading ++ for both pre and post increment - Stack Overflow
Nov 23, 2021 · [N4687] 16.5.7. The user-defined function called operator++ implements the prefix and postfix ++ operator. If this function is a non-static member function with no parameters, or …
Operator overloading in header files and in the cpp files
The operator is not a member of the class, it is a friend so. ostream& Hallgato::operator<<(ostream& output, const Hallgato& H) { should be . ostream& …
c++ - Operator Overloading in struct - Stack Overflow
Apr 10, 2015 · With regards to your last question, the compiler makes no assumptions concerning what your operator does. (Remember, the + operator on std::string is not commutative.) So …
c++ - Comparison operator overloading - Stack Overflow
May 14, 2012 · @mdenton8, Sure, but it's idiomatic to define both operator< and operator== from scratch if you want all of the comparison operators. Some C++ STL algorithms and containers …
Overloading operator<< for printing as a member - Stack Overflow
Dec 12, 2011 · ostream& operator<<(ostream& os, TestClass& obj) { return os << "I'm outside of the class and can't access msg" << endl; } But then the only way to access the private parts of …