[libc++] Format the code base (#74334)

This patch runs clang-format on all of libcxx/include and libcxx/src, in
accordance with the RFC discussed at [1]. Follow-up patches will format
the benchmarks, the test suite and remaining parts of the code. I'm
splitting this one into its own patch so the diff is a bit easier to
review.

This patch was generated with:

   find libcxx/include libcxx/src -type f \
      | grep -v 'module.modulemap.in' \
      | grep -v 'CMakeLists.txt' \
      | grep -v 'README.txt' \
      | grep -v 'libcxx.imp' \
      | grep -v '__config_site.in' \
      | xargs clang-format -i

A Git merge driver is available in libcxx/utils/clang-format-merge-driver.sh
to help resolve merge and rebase issues across these formatting changes.

[1]: https://discourse.llvm.org/t/rfc-clang-formatting-all-of-libc-once-and-for-all

1 files changed, 33 insertions, 32 deletions

diff --git a/libcxx/include/__algorithm/merge.h b/libcxx/include/__algorithm/merge.h
index 8a6021f..bad663c 100644
--- a/libcxx/include/__algorithm/merge.h
+++ b/libcxx/include/__algorithm/merge.h
@@ -22,45 +22,46 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-_OutputIterator
-__merge(_InputIterator1 __first1, _InputIterator1 __last1,
-        _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
-{
-    for (; __first1 != __last1; ++__result)
-    {
-        if (__first2 == __last2)
-            return std::copy(__first1, __last1, __result);
-        if (__comp(*__first2, *__first1))
-        {
-            *__result = *__first2;
-            ++__first2;
-        }
-        else
-        {
-            *__result = *__first1;
-            ++__first1;
-        }
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator __merge(
+    _InputIterator1 __first1,
+    _InputIterator1 __last1,
+    _InputIterator2 __first2,
+    _InputIterator2 __last2,
+    _OutputIterator __result,
+    _Compare __comp) {
+  for (; __first1 != __last1; ++__result) {
+    if (__first2 == __last2)
+      return std::copy(__first1, __last1, __result);
+    if (__comp(*__first2, *__first1)) {
+      *__result = *__first2;
+      ++__first2;
+    } else {
+      *__result = *__first1;
+      ++__first1;
     }
-    return std::copy(__first2, __last2, __result);
+  }
+  return std::copy(__first2, __last2, __result);
 }
 
 template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-_OutputIterator
-merge(_InputIterator1 __first1, _InputIterator1 __last1,
-      _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
-{
-    return std::__merge<__comp_ref_type<_Compare> >(__first1, __last1, __first2, __last2, __result, __comp);
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
+merge(_InputIterator1 __first1,
+      _InputIterator1 __last1,
+      _InputIterator2 __first2,
+      _InputIterator2 __last2,
+      _OutputIterator __result,
+      _Compare __comp) {
+  return std::__merge<__comp_ref_type<_Compare> >(__first1, __last1, __first2, __last2, __result, __comp);
 }
 
 template <class _InputIterator1, class _InputIterator2, class _OutputIterator>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
-_OutputIterator
-merge(_InputIterator1 __first1, _InputIterator1 __last1,
-      _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
-{
-    return std::merge(__first1, __last1, __first2, __last2, __result, __less<>());
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
+merge(_InputIterator1 __first1,
+      _InputIterator1 __last1,
+      _InputIterator2 __first2,
+      _InputIterator2 __last2,
+      _OutputIterator __result) {
+  return std::merge(__first1, __last1, __first2, __last2, __result, __less<>());
 }
 
 _LIBCPP_END_NAMESPACE_STD