std::experimental::propagate_const<T>::operator=

 

C++

Compiler support

Freestanding and hosted

Language

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)

Technical specifications

Symbols index

External libraries

 

Technical specifications

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)

 

Library fundamentals v2

experimental::propagate_const

experimental::not_fn

experimental::observer_ptr

experimental::make_array

experimental::to_array

experimental::ostream_joiner

experimental::gcd

experimental::lcm

experimental::source_location

experimental::randint

detection idiom

uniform container erasure

logical operator type traits

 

std::experimental::propagate_const

Member functions

propagate_const::propagate_const

propagate_const::operator=

propagate_const::swap

Observers

propagate_const::get

propagate_const::operator bool

propagate_const::operator*propagate_const::operator->

propagate_const::operator element_type*propagate_const::operator const element_type*

Non-member functions

operator==operator!=operator<operator>operator<=operator>operator>=

swap

get_underlying

Helper classes

std::hash

std::equal_tostd::not_equal_tostd::lessstd::greaterstd::less_equalstd::greater_equal

 

constexpr propagate_const& operator=( propagate_const&& p ) = default;	(1)	(library fundamentals TS v2)
template<class U> constexpr propagate_const& operator=( propagate_const<U>&& pu );	(2)	(library fundamentals TS v2)
template<class U> constexpr propagate_const& operator=( U&& u );	(3)	(library fundamentals TS v2)
propagate_const& operator=( const propagate_const& ) = delete;	(4)	(library fundamentals TS v2)

Let t_ designate the private data member that is the wrapped pointer-like object.

1) Explicitly defaulted move assignment operator that move assigns this->t_ from p.t_.

2) Assigns std::move(pu.t_) to this->t_.
This overload participates in overload resolution only if U is implicitly convertible to T.

3) Assigns std::forward<U>(u) to this->t_.
This overload participates in overload resolution only if U is implicitly convertible to T and std::decay_t<U> is not a specialization of propagate_const.

4) Copy assignment operator is explicitly deleted. propagate_const is non-copyable.

Parameters

p	-	another propagate_const object to move from
pu	-	another propagate_const object of a different specialization to move from
u	-	another object to assign to the contained pointer

Return value

*this.