std::DerivedFrom

 

C++

Language

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Language support library

Concepts library (C++20)

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Technical Specifications

 

Concepts library

Core language concepts
Same DerivedFrom ConvertibleTo CommonReference Common	Integral SignedIntegral UnsignedIntegral Assignable SwappableSwappableWith	Destructible Constructible DefaultConstructible MoveConstructible CopyConstructible
Comparison concepts
Boolean	EqualityComparableEqualityComparableWith	StrictTotallyOrderedStrictTotallyOrderedWith
Object concepts
Movable Copyable	Semiregular Regular
Callable concepts
InvocableRegularInvocable	Predicate	Relation StrictWeakOrder

 

Defined in header <concepts>
template< class Derived, class Base > concept DerivedFrom =   std::is_base_of_v<Base, Derived> &&   std::is_convertible_v<const volatile Derived*, const volatile Base*>;		(since C++20)

The concept DerivedFrom<Derived, Base> is satisfied if and only if Base is a class type that is either Derived or a public and unambiguous base of Derived, ignoring cv-qualifiers.

Note that this behaviour is different to std::is_base_of when Base is a private or protected base of Derived.

See also

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)