std::move_constructible

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Concepts library

Core language concepts
same_as (C++20)
derived_from (C++20)
convertible_to (C++20)
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integral (C++20)
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swappableswappable_with (C++20)(C++20)
destructible (C++20)
constructible_from (C++20)
default_initializable (C++20)
move_constructible (C++20)
copy_constructible (C++20)
assignable_from (C++20)

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equality_comparableequality_comparable_with (C++20)(C++20)
totally_orderedtotally_ordered_with (C++20)(C++20)
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movable (C++20)
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invocableregular_invocable (C++20)(C++20)
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Exposition-only concepts
boolean-testable (C++20)

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Defined in header`<concepts>`
template<class T> concept move_constructible=std::constructible_from<T, T>&&std::convertible_to<T, T>;		(since C++20)

The conceptmove_constructible is satisfied ifT is a reference type, or if it is an object type where an object of that type can be constructed from an rvalue of that type in both direct- and copy-initialization contexts, with the usual semantics.

[edit]Semantic requirements

IfT is an object type, thenmove_constructible<T> is modeled only if given

rv, an rvalue of typeT, and
u2, a distinct object of typeT equal torv,

the following are true:

After the definitionT u= rv;,u is equal tou2;
T(rv) is equal tou2; and
IfT is not const-qualified, thenrv's resulting state (after the definition/expression is evaluated in either bullets above) is valid but unspecified; otherwise, it is unchanged.