C++ named requirements: BinaryTypeTrait (since C++11)

A BinaryTypeTrait is a class template that describes a relationship between its two template type parameters with a intergral_constant (typically bool_constant) specialization.

Requirements

• DefaultConstructible and CopyConstructible
• Takes two template type parameters (additional template parameters are optional and allowed)
• Publicly and unambiguously derived from a specialization of intergral_constant, known as its base characteristic
• The member names of the base characteristic are not hidden and are unambiguously available

Standard library

The following standard library class templates satisfy BinaryTypeTrait.

is_same (C++11)	checks if two types are the same (class template)
is_base_of (C++11)	checks if a type is derived from the other type (class template)
is_convertibleis_nothrow_convertible (C++11)(C++20)	checks if a type can be converted to the other type (class template)
is_invocableis_invocable_ris_nothrow_invocableis_nothrow_invocable_r (C++17)	checks if a type can be invoked (as if by std::invoke) with the given argument types (class template)
uses_allocator (C++11)	checks if the specified type supports uses-allocator construction (class template)