std::pmr::polymorphic_allocator<T>:: select_on_container_copy_construction

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uninitialized_copy
uninitialized_fill
uninitialized_move (C++17)
uninitialized_default_construct (C++17)
uninitialized_value_construct (C++17)
destroy (C++17)
destroy_at (C++17)
voidify (C++20)

uninitialized_copy_n (C++11)
uninitialized_fill_n
uninitialized_move_n (C++17)
uninitialized_default_construct_n (C++17)
uninitialized_value_construct_n (C++17)
destroy_n (C++17)
construct_at (C++20)

Constrained uninitialized memory algorithms

ranges::uninitialized_copy (C++20)
ranges::uninitialized_fill (C++20)
ranges::uninitialized_move (C++20)
ranges::construct_at (C++20)
ranges::destroy (C++20)
ranges::destroy_n (C++20)
ranges::destroy_at (C++20)

ranges::uninitialized_copy_n (C++20)
ranges::uninitialized_fill_n (C++20)
ranges::uninitialized_move_n (C++20)
ranges::uninitialized_default_construct (C++20)
ranges::uninitialized_value_construct (C++20)
ranges::uninitialized_default_construct_n (C++20)
ranges::uninitialized_value_construct_n (C++20)

Allocators

allocator
allocator_traits (C++11)
allocation_result (C++23)
allocator_arg (C++11)
uses_allocator (C++11)

uses_allocator_construction_args (C++20)
make_obj_using_allocator (C++20)
uninitialized_construct_using_allocator (C++20)
scoped_allocator_adaptor (C++11)
pmr::polymorphic_allocator (C++17)

Memory resources
pmr::memory_resource (C++17)
pmr::get_default_resource (C++17)
pmr::set_default_resource (C++17)
pmr::new_delete_resource (C++17)
pmr::null_memory_resource (C++17)
pmr::synchronized_pool_resource (C++17)
pmr::unsynchronized_pool_resource (C++17)
pmr::monotonic_buffer_resource (C++17)
pmr::pool_options (C++17)

Garbage collection support
declare_reachable (C++11) (until C++23)
undeclare_reachable (C++11) (until C++23)
declare_no_pointers (C++11) (until C++23)
undeclare_no_pointers (C++11) (until C++23)
pointer_safety (C++11) (until C++23)
get_pointer_safety (C++11) (until C++23)

Uninitialized storage
raw_storage_iterator ( until C++20* )
get_temporary_buffer ( until C++20* )
return_temporary_buffer ( until C++20* )

Explicit lifetime management
start_lifetime_as start_lifetime_as_array (C++23) (C++23)

Smart pointers

unique_ptr

(C++11)

shared_ptr

(C++11)

weak_ptr

(C++11)

auto_ptr

( until C++17* )

owner_less

(C++11)

owner_less<void>

(C++17)

owner_hash

(C++26)

owner_equal

(C++26)

enable_shared_from_this

(C++11)

bad_weak_ptr

(C++11)

default_delete

(C++11)

out_ptr_t

(C++23)

inout_ptr_t

(C++23)

Low level memory
management

operator new

operator new[]

operator delete

operator delete[]

get_new_handler

(C++11)

set_new_handler

launder

(C++17)

bad_alloc

bad_array_new_length

(C++11)

nothrow_t

align_val_t

(C++17)

destroying_delete_t

(C++20)

new_handler

nothrow

Miscellaneous

pointer_traits

(C++11)

to_address

(C++20)

addressof

(C++11)

align

(C++11)

assume_aligned

(C++20)

C Library

malloc
calloc
realloc

aligned_alloc (C++17)
free

polymorphic_allocator select_on_container_copy_construction ( ) const ;		(since C++17)

Returns a default-constructed polymorphic_allocator object.

Parameters

(none)

Return value

A default-constructed polymorphic_allocator object.

Notes

polymorphic_allocator s do not propagate on container copy construction.

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

Member functions
polymorphic_allocator::polymorphic_allocator
polymorphic_allocator::allocate
polymorphic_allocator::deallocate
polymorphic_allocator::construct
polymorphic_allocator::destroy ( C++20/26* )
polymorphic_allocator::allocate_bytes (C++20)
polymorphic_allocator::deallocate_bytes (C++20)
polymorphic_allocator::allocate_object (C++20)
polymorphic_allocator::deallocate_object (C++20)
polymorphic_allocator::new_object (C++20)
polymorphic_allocator::delete_object (C++20)
polymorphic_allocator::select_on_container_copy_construction
polymorphic_allocator::resource
Non-member functions
operator== operator!= (until C++20)

std::pmr::polymorphic_allocator<T>:: select_on_container_copy_construction

Parameters

Return value

Notes

See also

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