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P0722R3: Implement library support for destroying delete

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Summary:
This provides the `std::destroying_delete_t` declaration in C++2a and after. (Even when the compiler doesn't support the language feature).

However, the feature test macro `__cpp_lib_destroying_delete` is only defined when we have both language support and  C++2a.


Reviewers: ldionne, ckennelly, serge-sans-paille, EricWF

Reviewed By: EricWF

Subscribers: dexonsmith, riccibruno, christof, jwakely, jdoerfert, mclow.lists, ldionne, libcxx-commits

Differential Revision: https://reviews.llvm.org/D55840

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@361572 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2019-05-23 23:46:44 +00:00
parent a3b377a1f4
commit 087c094fec
7 changed files with 98 additions and 9 deletions
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9
utils/generate_feature_test_macro_components.py
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@@ -483,7 +483,14 @@ feature_test_macros = sorted([ add_version_header(x) for x in [
"c++2a": 201806L,
},
"headers": ["new"],
"unimplemented": True,
"depends":
"TEST_STD_VER > 17"
" && defined(__cpp_impl_destroying_delete)"
" && __cpp_impl_destroying_delete >= 201806L",
"internal_depends":
"_LIBCPP_STD_VER > 17"
" && defined(__cpp_impl_destroying_delete)"
" && __cpp_impl_destroying_delete >= 201806L",
},
{"name": "__cpp_lib_three_way_comparison",
"values": {