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author | Marshall Clow <mclow.lists@gmail.com> | 2019-02-06 16:10:25 +0000 |
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committer | Marshall Clow <mclow.lists@gmail.com> | 2019-02-06 16:10:25 +0000 |
commit | 4f9dc4d9cfbede47cd4cba9e280b2768cb478a9f (patch) | |
tree | 8d36aecdc961871f9e24cb2013aa7bdccbc51e4f | |
parent | 5569a5e69c48d28f59bd0b5d57b84a5586ec3bbb (diff) | |
download | libcxx-4f9dc4d9cfbede47cd4cba9e280b2768cb478a9f.tar.gz |
Add a specialization for '__unwrap_iter' to handle const interators. This enables the 'memmove' optimization for std::copy, etc.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@353311 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r-- | include/algorithm | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/algorithm b/include/algorithm index b52d44522..7da753a49 100644 --- a/include/algorithm +++ b/include/algorithm @@ -1610,6 +1610,18 @@ __unwrap_iter(__wrap_iter<_Tp*> __i) return __i.base(); } +template <class _Tp> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG +typename enable_if +< + is_trivially_copy_assignable<_Tp>::value, + const _Tp* +>::type +__unwrap_iter(__wrap_iter<const _Tp*> __i) +{ + return __i.base(); +} + #else template <class _Tp> |