std::experimental::ranges::CopyConstructible

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Experimental

Technical Specification

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Extensions for concurrency 2 (concurrency TS v2)

Concepts (concepts TS)

Ranges (ranges TS)

Reflection (reflection TS)

Mathematical special functions (special functions TR)

Experimental Non-TS

Pattern Matching

Linear Algebra

std::execution

Contracts

2D Graphics

 

Ranges

Concepts

General utilities

Iterators

Ranges

Algorithms

 

Concepts library

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

 

Defined in header <experimental/ranges/concepts>
template< class T > concept bool CopyConstructible =     MoveConstructible<T> &&     Constructible<T, T&> && ConvertibleTo<T&, T> &&     Constructible<T, const T&> && ConvertibleTo<const T&, T> &&     Constructible<T, const T> && ConvertibleTo<const T, T>;		(ranges TS)

The concept CopyConstructible is satisfied if T is an lvalue reference type, or if it is a MoveConstructible object type where an object of that type can constructed from a (possibly const) lvalue or const rvalue of that type in both direct- and copy-initialization contexts with the usual semantics (a copy is constructed with the source unchanged).

More precisely, if T is an object type, then CopyConstructible<T> is satisfied only if given

• v, an lvalue of type (possibly const) T or an rvalue of type const T,

the following are true:

• After the definition T u = v;, u is equal to v;
• T{v} is equal to v.

See also

is_copy_constructibleis_trivially_copy_constructibleis_nothrow_copy_constructible (C++11)(C++11)(C++11)

checks if a type has a copy constructor (class template)