I'm struggling with providing the new spaceship-operator for a enum class. Lets take the following example: But obviously I'm getting something wro ...
I'm struggling with providing the new spaceship-operator for a enum class. Lets take the following example: But obviously I'm getting something wro ...
I am trying to explicitly implement the spaceship operator. The following is a simple example which fails. What am I doing wrong? godbolt link ...
The following compiles fine with GCC and clang on on godbolt, but on my MacBook, in Xcode 14 it dies: #include <iostream> #include <compare& ...
c++20 default comparison operator is a very convenient feature. But I find it less useful if the class has an empty base class. The default operat ...
The following code is intended to implement comparison on an object that contains an array. Two objects should compare as <,==,> if all array el ...
In this code example, it seems that adding unreleated operator== (on a different type) renders the shaceship opreator not functional. This is tested i ...
Simple Task: I have these two types I want to use this new C++20 spaceship op that everyone says is so cool to be able to write type_a{} == type_b{ ...
The following code is treated differently by the compilers: Both GCC and MSVC accept it, but not Clang which returns the error: Demo: https://gc ...
According to this, the spaceship operator (<=>) returns "an integer less than, equal to, or greater than zero, depending on if $x is less than, ...
This code snippet Compiles without errors in C++17 (Visual Studio 2022). (See C++17 operator==() and operator!=() code fails with C++20 for a more ...
If we have an enum class like this enum class alpha{ a, b, c, d}; Is it possible to implement an operator that establishes an ordering relationsh ...
See online demo Why must I provide operator == when operator <=> is enough? ...
Does the new C++20 spaceship operator allow a concise way of expressing short-circuited multiple-criteria comparison? Something better than this: ...
I have written this simple code but it does not compile because the comparison is implicit deleted. Can anybody explain to me how to fix the proble ...
#include <compare> #include <iostream> int main() { auto comp1 = 1.1 <=> 2.2; auto comp2 = -1 <=> 1; std::cout < ...
Consider the following two overload operator<=> for S: If I compare an object S with an int, the #1 will generate the right operators for me, ...
Consider the following useless code: Clang and MSVC accept this code but GCC rejects it with an error message: Which compiler is right? How oper ...
To my surprise, I ran into another snag like C++20 behaviour breaking existing code with equality operator?. Consider a simple case-insensitive key t ...
Motivation: sometimes I use std::variant to implement "fancy" enum where some enum states can carry state. Now if I want to use the <=> for my ...
EDIT: This has nothing to do with spaceship. It is just that the use of spaceship obfuscated the real issue in my code (see answer for details). I wa ...