Answer by R Sahu for What are the basic rules and idioms for operator...
Why can't operator<< function for streaming objects to std::cout or to a file be a member function? Let's say you have: struct Foo { int a; double b; std::ostream&...
View ArticleAnswer by JKor for What are the basic rules and idioms for operator overloading?
Conversion Operators (also known as User Defined Conversions) In C++ you can create conversion operators, operators that allow the compiler to convert between your types and other defined types. There...
View ArticleAnswer by sbi for What are the basic rules and idioms for operator overloading?
Overloading new and delete Note: This only deals with the syntax of overloading new and delete, not with the implementation of such overloaded operators. I think that the semantics of overloading new...
View ArticleAnswer by sbi for What are the basic rules and idioms for operator overloading?
The Decision between Member and Non-member The binary operators = (assignment), [] (array subscription), -> (member access), as well as the n-ary () (function call) operator, must always be...
View ArticleAnswer by sbi for What are the basic rules and idioms for operator overloading?
Common operators to overload Most of the work in overloading operators is boiler-plate code. That is little wonder, since operators are merely syntactic sugar, their actual work could be done by (and...
View ArticleAnswer by sbi for What are the basic rules and idioms for operator overloading?
The General Syntax of operator overloading in C++ You cannot change the meaning of operators for built-in types in C++, operators can only be overloaded for user-defined types1. That is, at least one...
View ArticleAnswer by sbi for What are the basic rules and idioms for operator overloading?
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 rules, there are indeed exceptions....
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Note: The answers were given in a specific order, but since many users sort answers according to votes, rather than the time they were given, here's an index of the answers in the order in which they...
View ArticleAnswer by Sagar Rai for What are the basic rules and idioms for operator...
Making it short and simple, I'll be referring to some points, which I had come over the past week as I was learning Python and C++, oops and other things, so it goes as follows:The Arity of the...
View ArticleAnswer by Jan Schultke for What are the basic rules and idioms for operator...
Summary of Canonical Function SignaturesMany operator overloads can return pretty much anything. For example, nothing stops you from returning void in operator==.However, only a few of these signatures...
View ArticleAnswer by Jan Schultke for What are the basic rules and idioms for operator...
Comparison Operators, including Three-Way Comparison(C++20)There are equality comparisons== and !=,and relational comparisons<, >, <=, >=.C++20 has also introduced the three-way comparison...
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