std::copyable

 

C++

Language

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Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

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Technical Specifications

 

Concepts library

Core language concepts
same_as derived_from convertible_to common_reference_with common_with	integral signed_integral unsigned_integral floating_point swappableswappable_with	destructible constructible_from default_constructible move_constructible copy_constructible assignable_from
Comparison concepts
boolean	equality_comparableequality_comparable_with	totally_orderedtotally_ordered_with
Object concepts
movable copyable	semiregular regular
Callable concepts
invocableregular_invocable	predicate	relation strict_weak_order

 

Defined in header <concepts>
template <class T> concept copyable =   std::copy_constructible<T> &&   std::movable<T> &&   std::assignable_from<T&, const T&>;		(since C++20)

The concept copyable<T> specifies that T is an movable object type that can also copied (that is, it supports copy construction and copy assignment).

Notes

It is intended that copyable<T> also requires std::assignable_from<T&, const T> (assignment from const rvalue) and std::assignable_from<T&, T&> (assignment from non-const lvalue) to be satisfied.

See also

movable (C++20)

specifies that an object of a type can be moved and swapped (concept)