std::regular - cppreference.com (original) (raw)

The regular concept specifies that a type is regular, that is, it is copyable, default constructible, and equality comparable. It is satisfied by types that behave similarly to built-in types like int, and that are comparable with ==.

[edit] Example

#include #include   template<std::regular T> struct Single { T value; friend bool operator==(const Single&, const Single&) = default; };   int main() { Single myInt1{4}; Single myInt2; myInt2 = myInt1;   if (myInt1 == myInt2) std::cout << "Equal\n";   std::cout << myInt1.value << ' ' << myInt2.value << '\n'; }

Output:

[edit] References

[edit] See also

| | specifies that an object of a type can be copied, moved, swapped, and default constructed (concept) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |