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Changes imported from Abseil "staging" branch:

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- 20f4e7133d695e9a05e13ebdfd4d78da310b42b5 Remove the warning supressions -Wno-documentation and by Derek Mauro <dmauro@google.com>
  - e1bde85c0571673b1e7a88b9d45a393606ba7e6c Changed the optimized version of strings_internal::JoinAl... by Abseil Team <absl-team@google.com>
  - 746e6716b4c15be61547670d68d25a1c850d3954 Add missing absl:: qualification. by Alex Strelnikov <strel@google.com>
  - 4e5c18c488cbd49ca72b02911cf22d830d5a7f16 Internals change: Remove the ability to pass a custom met... by Greg Falcon <gfalcon@google.com>
  - 65d58107a5730d4b6468bbffc72bea2f980af826 Moved most common character case (ascii printable) out of... by Abseil Team <absl-team@google.com>
  - f031331cc55a3d57b9110e12c7cbe50ac3e2a04f Add missing copyright headers to a few source files. by Greg Falcon <gfalcon@google.com>
  - 6035a77af6fa951c536b42df4c710d16d1817aec Enable libstdc++'s memcmp optimization in absl::equal for... by Abseil Team <absl-team@google.com>
  - 73a665a4a10781e5d89f75a876ece7ad859f4116 Fix minor spelling error "hexidecimal". by Abseil Team <absl-team@google.com>

GitOrigin-RevId: 20f4e7133d695e9a05e13ebdfd4d78da310b42b5
Change-Id: Id8c18ebd331d096935052a6ab259ebe0e2ef13ae
This commit is contained in:
Abseil Team 2017-12-20 12:34:46 -08:00 • committed by Xiaoyi Zhang
parent 4972c72c5c
commit ff70456473
20 changed files with 251 additions and 114 deletions
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12
absl/algorithm/algorithm.h
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@ -59,6 +59,18 @@ bool EqualImpl(InputIter1 first1, InputIter1 last1, InputIter2 first2,
std::equal(first1, last1, first2, std::forward<Pred>(pred));
}
// When we are using our own internal predicate that just applies operator==, we
// forward to the non-predicate form of std::equal. This enables an optimization
// in libstdc++ that can result in std::memcmp being used for integer types.
template <typename InputIter1, typename InputIter2>
bool EqualImpl(InputIter1 first1, InputIter1 last1, InputIter2 first2,
InputIter2 last2, algorithm_internal::EqualTo /* unused */,
std::random_access_iterator_tag,
std::random_access_iterator_tag) {
return (last1 - first1 == last2 - first2) &&
std::equal(first1, last1, first2);
}
template <typename It>
It RotateImpl(It first, It middle, It last, std::true_type) {
return std::rotate(first, middle, last);