Use algorithms for affected operations

Author: frederick-vs-ja

libcxx/include/__locale_dir/num.h

@@ -9,6 +9,7 @@
 #ifndef _LIBCPP___LOCALE_DIR_NUM_H
 #define _LIBCPP___LOCALE_DIR_NUM_H
 
+#include <__algorithm/copy.h>
 #include <__algorithm/find.h>
 #include <__algorithm/reverse.h>
 #include <__charconv/to_chars_integral.h>
@@ -885,9 +886,7 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob, char_ty
   const numpunct<char_type>& __np = std::use_facet<numpunct<char_type> >(__iob.getloc());
   typedef typename numpunct<char_type>::string_type string_type;
   string_type __nm = __v ? __np.truename() : __np.falsename();
-  for (typename string_type::iterator __i = __nm.begin(); __i != __nm.end(); ++__i, (void)++__s)
-    *__s = *__i;
-  return __s;
+  return std::copy(__nm.begin(), __nm.end(), __s);
 }
 
 template <class _CharT, class _OutputIterator>

libcxx/include/__locale_dir/pad_and_output.h

@@ -13,6 +13,8 @@
 
 #if _LIBCPP_HAS_LOCALIZATION
 
+#  include <__algorithm/copy.h>
+#  include <__algorithm/fill_n.h>
 #  include <ios>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -30,12 +32,9 @@ _LIBCPP_HIDE_FROM_ABI _OutputIterator __pad_and_output(
     __ns -= __sz;
   else
     __ns = 0;
-  for (; __ob < __op; ++__ob, (void)++__s)
-    *__s = *__ob;
-  for (; __ns; --__ns, (void)++__s)
-    *__s = __fl;
-  for (; __ob < __oe; ++__ob, (void)++__s)
-    *__s = *__ob;
+  __s = std::copy(__ob, __op, __s);
+  __s = std::fill_n(__s, __ns, __fl);
+  __s = std::copy(__op, __oe, __s);
   __iob.width(0);
   return __s;
 }

libcxx/include/__random/piecewise_constant_distribution.h

@@ -12,6 +12,7 @@
 #include <__algorithm/upper_bound.h>
 #include <__config>
 #include <__cstddef/ptrdiff_t.h>
+#include <__iterator/back_insert_iterator.h>
 #include <__random/is_valid.h>
 #include <__random/uniform_real_distribution.h>
 #include <__vector/vector.h>
@@ -190,8 +191,7 @@ piecewise_constant_distribution<_RealType>::param_type::param_type(
     __areas_.assign(1, 0.0);
   } else {
     __densities_.reserve(__b_.size() - 1);
-    for (size_t __i = 0; __i < __b_.size() - 1; ++__i, (void)++__f_w)
-      __densities_.push_back(*__f_w);
+    std::copy_n(__f_w, __b_.size() - 1, std::back_inserter(__densities_));
     __init();
   }
 }

libcxx/include/__random/piecewise_linear_distribution.h

@@ -12,6 +12,7 @@
 #include <__algorithm/upper_bound.h>
 #include <__config>
 #include <__cstddef/ptrdiff_t.h>
+#include <__iterator/back_insert_iterator.h>
 #include <__random/is_valid.h>
 #include <__random/uniform_real_distribution.h>
 #include <__vector/comparison.h>
@@ -194,8 +195,7 @@ piecewise_linear_distribution<_RealType>::param_type::param_type(
     __areas_.assign(1, 0.0);
   } else {
     __densities_.reserve(__b_.size());
-    for (size_t __i = 0; __i < __b_.size(); ++__i, (void)++__f_w)
-      __densities_.push_back(*__f_w);
+    std::copy_n(__f_w, __b_.size(), std::back_inserter(__densities_));
     __init();
   }
 }