P0466R5 Layout-Compatibility And Pointer-Interconvertibility Traits #18
Description
P0466R5 Layout-Compatibility And Pointer-Interconvertibility Traits
Feature-test macros as of WG21-N4842:
#define __cpp_lib_is_layout_compatible 201907L
#define __cpp_lib_is_pointer_interconvertible 201907L
This needs compiler support, implemented by Microsoft-internal MSVC-PR-227560 for VS 2019 16.7.
Compiler bugs encountered:
- VSO-1231996 Missing
__builtin_*intrinsics helpers for Corresponding Member and Pointer-interconvertibility Traits- Fixed for VS 2019 16.9 Preview 2 by MSVC-PR-282455
- VSO-1232619
__builtin_is_pointer_interconvertible_base_ofintrinsic returns incorrect values- Fixed for VS 2019 16.9 Preview 2 by MSVC-PR-285501