FreeChainXenon/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

libstdc++: Make pmr::memory_resource::allocate implicitly create objects

Browse source 
Calling the placement version of ::operator new "implicitly creates
objects in the returned region of storage" as per [intro.object]. This
allows the returned memory to be used as storage for implicit-lifetime
types (including arrays) without additional action by the caller. This
is required by the proposed resolution of LWG 3147.

libstdc++-v3/ChangeLog:

	* include/std/memory_resource (memory_resource::allocate):
	Implicitly create objects in the returned storage.
This commit is contained in:
Jonathan Wakely 2021-11-10 16:59:29 +00:00
parent ef0e100f58
commit 083fd73202
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
libstdc++-v3/include/std/memory_resource
View file

@ -33,6 +33,7 @@
#if __cplusplus >= 201703L
#include <new>
#include <vector> // vector
#include <cstddef> // size_t, max_align_t, byte
#include <shared_mutex> // shared_mutex
@ -103,7 +104,7 @@ namespace pmr
void*
allocate(size_t __bytes, size_t __alignment = _S_max_align)
__attribute__((__returns_nonnull__,__alloc_size__(2),__alloc_align__(3)))
{ return do_allocate(__bytes, __alignment); }
{ return ::operator new(__bytes, do_allocate(__bytes, __alignment)); }
void
deallocate(void* __p, size_t __bytes, size_t __alignment = _S_max_align)