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| author | Richard Smith <richard-llvm@metafoo.co.uk> | 2017-08-30 22:58:37 +0000 |
|---|---|---|
| committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2017-08-30 22:58:37 +0000 |
| commit | 243bd1964baf9d79d199e78be1e0627cc1ff0a9b (patch) | |
| tree | b78c08fdc1f25e3aa0b86c65b575209d85a7b14c | |
| parent | 1d4ad2c1c46164e9cbfd145814756a48f04f0d53 (diff) | |
Add a couple of release note updates for C++ changes since Clang 4.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_50@312187 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/ReleaseNotes.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index af977dcf71..8341207815 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -149,10 +149,23 @@ assignment operators where applicable. C++ Language Changes in Clang ----------------------------- +- Support for the C++17 standard has been completed. This mode can be enabled + using ``-std=c++17`` (the old flag ``-std=c++1z`` is still supported for + compatibility). + +- When targeting a platform that uses the Itanium C++ ABI, Clang implements a + `recent change to the ABI`__ that passes objects of class type indirectly if they + have a non-trivial move constructor. Previous versions of Clang only + considered the copy constructor, resulting in an ABI change in rare cases, + but GCC has already implemented this change for several releases. + This affects all targets other than Windows and PS4. You can opt out of this + ABI change with ``-fclang-abi-compat=4.0``. + - As mentioned in `C Language Changes in Clang`_, Clang's support for implicit scalar to vector conversions also applies to C++. Additionally the following operators are also supported: ``&&`` and ``||``. +.. __: https://github.com/itanium-cxx-abi/cxx-abi/commit/7099637aba11fed6bdad7ee65bf4fd3f97fbf076 Objective-C Language Changes in Clang ------------------------------------- |