I have two structs that should compare equal memberwise. I figured the c++ compiler would generate a comparison function by itself, but it doesn’t seem to know how. Here’s the code:

#include <iostream>

struct MyEntity
{
    int a;
    int b;    
};

int main()
{
    const MyEntity e1{1,2};
    MyEntity e2{1,2};
    if (e1 == e2)
    {
        std::cout << "Hello World" << std::endl;
    }

}

The error will be:

<source>: In function 'int main()':
<source>:13:12: error: no match for 'operator==' (operand types are 'const MyEntity' and 'MyEntity')
   13 |     if (e1 == e2)
      |         ~~ ^~ ~~
      |         |     |
      |         |     MyEntity
      |         const MyEntity

Is there a way to nudge the compiler into generating an operator== (const MyEntity& other) const or do I have to code it myself?