commit 56226768e8d26c52bd51a2f9d4939207611bf0fe
author Arthur O'Dwyer <arthur.j.odwyer@gmail.com> Wed Mar 03 23:02:20 2021 -0500
committer Copybara-Service <copybara-worker@google.com> Mon Mar 29 06:25:34 2021 -0700
tree 7793d72fbd218b50179d4930b1f1b58801ae1c93
parent 0be7be729a2f9586e8a0b82d2a0d20344d571e4b

[libc++] Use _EnableIf and __iter_value_type consistently. NFCI.

Specifically, use these metafunctions consistently in areas that are
about to be affected by P1518R2's changes.

This is the NFCI part of https://reviews.llvm.org/D97742 .
The functional-change part is still waiting for P1518R2 to be
officially merged into the working draft.

GitOrigin-RevId: 199d2ebeed8382071809983f016e482b1d013b62

include/string

diff --git a/include/string b/include/string
index a5fe625..5f49b47 100644
--- a/include/string
+++ b/include/string
@@ -1740,7 +1740,7 @@
 
 #ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
 template<class _InputIterator,
-         class _CharT = typename iterator_traits<_InputIterator>::value_type,
+         class _CharT = __iter_value_type<_InputIterator>,
          class _Allocator = allocator<_CharT>,
          class = _EnableIf<__is_cpp17_input_iterator<_InputIterator>::value>,
          class = _EnableIf<__is_allocator<_Allocator>::value>