re PR libstdc++/64657 (Support iterators with overloaded operator-comma)

	PR libstdc++/64657
	* include/bits/basic_string (basic_string::_S_copy_chars): Cast
	expression to void.
	* include/bits/locale_facets_nonio.tcc (money_get::_M_extract,
	time_get::_M_extract_num, time_get::_M_extract_name,
	time_get::_M_extract_wday_or_month): Likewise.
	* include/bits/stl_algo.h (__includes, __replace_copy_if,
	__is_sorted_until, __is_permutation, transform): Likewise.
	* include/bits/stl_algobase.h (swap_ranges, __copy_move::__copy_m,
	__equal::equal, __lexicographical_compare_impl, equal): Likewise.
	* include/bits/stl_numeric.h (inner_product): Likewise.
	* include/bits/stl_uninitialized.h (__uninitialized_copy_a): Likewise.
	* testsuite/util/testsuite_iterators.h (output_iterator_wrapper,
	input_iterator_wrapper): Declare unusable comma operator.
	* testsuite/21_strings/basic_string/cons/char/64657.cc: New.
	* testsuite/21_strings/basic_string/modifiers/assign/char/64657.cc:
	New.

From-SVN: r222579

libstdc++-v3/ChangeLog

+2015-04-29  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/64657
+	* include/bits/basic_string (basic_string::_S_copy_chars): Cast
+	expression to void.
+	* include/bits/locale_facets_nonio.tcc (money_get::_M_extract,
+	time_get::_M_extract_num, time_get::_M_extract_name,
+	time_get::_M_extract_wday_or_month): Likewise.
+	* include/bits/stl_algo.h (__includes, __replace_copy_if,
+	__is_sorted_until, __is_permutation, transform): Likewise.
+	* include/bits/stl_algobase.h (swap_ranges, __copy_move::__copy_m,
+	__equal::equal, __lexicographical_compare_impl, equal): Likewise.
+	* include/bits/stl_numeric.h (inner_product): Likewise.
+	* include/bits/stl_uninitialized.h (__uninitialized_copy_a): Likewise.
+	* testsuite/util/testsuite_iterators.h (output_iterator_wrapper,
+	input_iterator_wrapper): Declare unusable comma operator.
+	* testsuite/21_strings/basic_string/cons/char/64657.cc: New.
+	* testsuite/21_strings/basic_string/modifiers/assign/char/64657.cc:
+	New.
+
 2015-04-28  Doug Evans  <dje@google.com>
 
 	* testsuite/libstdc++-xmethods/list.cc (_GLIBCXX_USE_CXX11_ABI):

libstdc++-v3/include/bits/basic_string.h

@@ -324,7 +324,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
         _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
 	_GLIBCXX_NOEXCEPT
         {
-	  for (; __k1 != __k2; ++__k1, ++__p)
+	  for (; __k1 != __k2; ++__k1, (void)++__p)
 	    traits_type::assign(*__p, *__k1); // These types are off.
 	}
 
@@ -2779,7 +2779,7 @@ _GLIBCXX_END_NAMESPACE_CXX11
         _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
 	_GLIBCXX_NOEXCEPT
         {
-	  for (; __k1 != __k2; ++__k1, ++__p)
+	  for (; __k1 != __k2; ++__k1, (void)++__p)
 	    traits_type::assign(*__p, *__k1); // These types are off.
 	}
 

libstdc++-v3/include/bits/locale_facets_nonio.tcc

@@ -202,7 +202,7 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11
 		    size_type __j = 0;
 		    for (; __beg != __end && __j < __len
 			   && *__beg == __lc->_M_curr_symbol[__j];
-			 ++__beg, ++__j);
+			 ++__beg, (void)++__j);
 		    if (__j != __len
 			&& (__j || __io.flags() & ios_base::showbase))
 		      __testvalid = false;
@@ -298,7 +298,7 @@ _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11
 	                                         : __lc->_M_positive_sign;
 	    size_type __i = 1;
 	    for (; __beg != __end && __i < __sign_size
-		   && *__beg == __sign[__i]; ++__beg, ++__i);
+		   && *__beg == __sign[__i]; ++__beg, (void)++__i);
 	    
 	    if (__i != __sign_size)
 	      __testvalid = false;
@@ -858,7 +858,7 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
       ++__min;
       size_t __i = 0;
       int __value = 0;
-      for (; __beg != __end && __i < __len; ++__beg, ++__i)
+      for (; __beg != __end && __i < __len; ++__beg, (void)++__i)
 	{
 	  const char __c = __ctype.narrow(*__beg, '*');
 	  if (__c >= '0' && __c <= '9')
@@ -923,7 +923,8 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
 	  for (size_t __i2 = 1; __i2 < __nmatches; ++__i2)
 	    __minlen = std::min(__minlen,
 			      __traits_type::length(__names[__matches[__i2]]));
-	  ++__beg, ++__pos;
+	  ++__beg;
+	  ++__pos;
 	  if (__pos < __minlen && __beg != __end)
 	    for (size_t __i3 = 0; __i3 < __nmatches;)
 	      {
@@ -940,11 +941,12 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
       if (__nmatches == 1)
 	{
 	  // Make sure found name is completely extracted.
-	  ++__beg, ++__pos;
+	  ++__beg;
+	  ++__pos;
 	  __name = __names[__matches[0]];
 	  const size_t __len = __traits_type::length(__name);
 	  while (__pos < __len && __beg != __end && __name[__pos] == *__beg)
-	    ++__beg, ++__pos;
+	    ++__beg, (void)++__pos;
 
 	  if (__len == __pos)
 	    __member = __matches[0];
@@ -987,7 +989,8 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
 
       if (__nmatches)
 	{
-	  ++__beg, ++__pos;
+	  ++__beg;
+	  ++__pos;
 
 	  __matches_lengths
 	    = static_cast<size_t*>(__builtin_alloca(sizeof(size_t)
@@ -997,7 +1000,7 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
 	      = __traits_type::length(__names[__matches[__i]]);
 	}
 
-      for (; __beg != __end; ++__beg, ++__pos)
+      for (; __beg != __end; ++__beg, (void)++__pos)
 	{
 	  size_t __nskipped = 0;
 	  const char_type __c = *__beg;

libstdc++-v3/include/bits/stl_algo.h

@@ -2805,7 +2805,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	else if (__comp(__first1, __first2))
 	  ++__first1;
 	else
-	  ++__first1, ++__first2;
+	  {
+	    ++__first1;
+	    ++__first2;
+	  }
 
       return __first2 == __last2;
     }
@@ -3108,7 +3111,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 		      _OutputIterator __result,
 		      _Predicate __pred, const _Tp& __new_value)
     {
-      for (; __first != __last; ++__first, ++__result)
+      for (; __first != __last; ++__first, (void)++__result)
 	if (__pred(__first))
 	  *__result = __new_value;
 	else
@@ -3232,7 +3235,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	return __last;
 
       _ForwardIterator __next = __first;
-      for (++__next; __next != __last; __first = __next, ++__next)
+      for (++__next; __next != __last; __first = __next, (void)++__next)
 	if (__comp(__next, __first))
 	  return __next;
       return __next;
@@ -3491,7 +3494,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
       // Efficiently compare identical prefixes:  O(N) if sequences
       // have the same elements in the same order.
-      for (; __first1 != __last1; ++__first1, ++__first2)
+      for (; __first1 != __last1; ++__first1, (void)++__first2)
 	if (!__pred(__first1, __first2))
 	  break;
 
@@ -3607,7 +3610,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       // Efficiently compare identical prefixes:  O(N) if sequences
       // have the same elements in the same order.
       for (; __first1 != __last1 && __first2 != __last2;
-	  ++__first1, ++__first2)
+	  ++__first1, (void)++__first2)
 	if (!__pred(__first1, __first2))
 	  break;
 
@@ -4171,7 +4174,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
             __typeof__(__unary_op(*__first))>)
       __glibcxx_requires_valid_range(__first, __last);
 
-      for (; __first != __last; ++__first, ++__result)
+      for (; __first != __last; ++__first, (void)++__result)
 	*__result = __unary_op(*__first);
       return __result;
     }
@@ -4210,7 +4213,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
             __typeof__(__binary_op(*__first1,*__first2))>)
       __glibcxx_requires_valid_range(__first1, __last1);
 
-      for (; __first1 != __last1; ++__first1, ++__first2, ++__result)
+      for (; __first1 != __last1; ++__first1, (void)++__first2, ++__result)
 	*__result = __binary_op(*__first1, *__first2);
       return __result;
     }

libstdc++-v3/include/bits/stl_algobase.h

@@ -173,7 +173,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 				  _ForwardIterator2>)
       __glibcxx_requires_valid_range(__first1, __last1);
 
-      for (; __first1 != __last1; ++__first1, ++__first2)
+      for (; __first1 != __last1; ++__first1, (void)++__first2)
 	std::iter_swap(__first1, __first2);
       return __first2;
     }
@@ -306,7 +306,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
         static _OI
         __copy_m(_II __first, _II __last, _OI __result)
         {
-	  for (; __first != __last; ++__result, ++__first)
+	  for (; __first != __last; ++__result, (void)++__first)
 	    *__result = *__first;
 	  return __result;
 	}
@@ -320,7 +320,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
         static _OI
         __copy_m(_II __first, _II __last, _OI __result)
         {
-	  for (; __first != __last; ++__result, ++__first)
+	  for (; __first != __last; ++__result, (void)++__first)
 	    *__result = std::move(*__first);
 	  return __result;
 	}
@@ -808,7 +808,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
         static bool
         equal(_II1 __first1, _II1 __last1, _II2 __first2)
         {
-	  for (; __first1 != __last1; ++__first1, ++__first2)
+	  for (; __first1 != __last1; ++__first1, (void)++__first2)
 	    if (!(*__first1 == *__first2))
 	      return false;
 	  return true;
@@ -889,7 +889,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       __last1 = __rai_type::__newlast1(__first1, __last1, __first2, __last2);
       for (; __first1 != __last1 && __rai_type::__cnd2(__first2, __last2);
-	   ++__first1, ++__first2)
+	   ++__first1, (void)++__first2)
 	{
 	  if (__comp(__first1, __first2))
 	    return true;
@@ -1088,7 +1088,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
       __glibcxx_function_requires(_InputIteratorConcept<_IIter2>)
       __glibcxx_requires_valid_range(__first1, __last1);
 
-      for (; __first1 != __last1; ++__first1, ++__first2)
+      for (; __first1 != __last1; ++__first1, (void)++__first2)
 	if (!bool(__binary_pred(*__first1, *__first2)))
 	  return false;
       return true;
@@ -1137,7 +1137,8 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
 	  return _GLIBCXX_STD_A::equal(__first1, __last1, __first2);
 	}
 
-      for (; __first1 != __last1 && __first2 != __last2; ++__first1, ++__first2)
+      for (; __first1 != __last1 && __first2 != __last2;
+	  ++__first1, (void)++__first2)
 	if (!(*__first1 == *__first2))
 	  return false;
       return __first1 == __last1 && __first2 == __last2;
@@ -1184,7 +1185,8 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
 				       __binary_pred);
 	}
 
-      for (; __first1 != __last1 && __first2 != __last2; ++__first1, ++__first2)
+      for (; __first1 != __last1 && __first2 != __last2;
+	  ++__first1, (void)++__first2)
 	if (!bool(__binary_pred(*__first1, *__first2)))
 	  return false;
       return __first1 == __last1 && __first2 == __last2;

libstdc++-v3/include/bits/stl_numeric.h

@@ -179,7 +179,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
       __glibcxx_function_requires(_InputIteratorConcept<_InputIterator2>)
       __glibcxx_requires_valid_range(__first1, __last1);
 
-      for (; __first1 != __last1; ++__first1, ++__first2)
+      for (; __first1 != __last1; ++__first1, (void)++__first2)
 	__init = __init + (*__first1 * *__first2);
       return __init;
     }
@@ -213,7 +213,7 @@ _GLIBCXX_BEGIN_NAMESPACE_ALGO
       __glibcxx_function_requires(_InputIteratorConcept<_InputIterator2>)
       __glibcxx_requires_valid_range(__first1, __last1);
 
-      for (; __first1 != __last1; ++__first1, ++__first2)
+      for (; __first1 != __last1; ++__first1, (void)++__first2)
 	__init = __binary_op1(__init, __binary_op2(*__first1, *__first2));
       return __init;
     }

libstdc++-v3/include/bits/stl_uninitialized.h

@@ -263,7 +263,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       __try
 	{
 	  typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
-	  for (; __first != __last; ++__first, ++__cur)
+	  for (; __first != __last; ++__first, (void)++__cur)
 	    __traits::construct(__alloc, std::__addressof(*__cur), *__first);
 	  return __cur;
 	}

libstdc++-v3/testsuite/21_strings/basic_string/cons/char/64657.cc

+// Copyright (C) 2015 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do compile }
+
+#include <string>
+#include <testsuite_iterators.h>
+
+void
+test01()
+{
+  using namespace __gnu_test;
+  char* p = 0;
+  test_container<char, forward_iterator_wrapper> c(p, p);
+  std::string s(c.begin(), c.end());
+}

libstdc++-v3/testsuite/21_strings/basic_string/modifiers/assign/char/64657.cc

+// Copyright (C) 2015 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do compile }
+
+#include <string>
+#include <testsuite_iterators.h>
+
+void
+test01()
+{
+  using namespace __gnu_test;
+  char* p = 0;
+  test_container<char, forward_iterator_wrapper> c(p, p);
+  std::string s;
+  s.assign(c.begin(), c.end());
+}

libstdc++-v3/testsuite/util/testsuite_iterators.h

@@ -170,6 +170,14 @@ namespace __gnu_test
       return tmp;
     }
 
+#if __cplusplus >= 201103L
+    template<typename U>
+      void operator,(const U&) const = delete;
+#else
+  private:
+    template<typename U>
+      void operator,(const U&) const;
+#endif
   };
 
   /**
@@ -251,6 +259,15 @@ namespace __gnu_test
     {
       ++*this;
     }
+
+#if __cplusplus >= 201103L
+    template<typename U>
+      void operator,(const U&) const = delete;
+#else
+  private:
+    template<typename U>
+      void operator,(const U&) const;
+#endif
   };
 
 
@@ -306,7 +323,7 @@ namespace __gnu_test
       ++*this;
       return tmp;
     }
-   };
+  };
 
   /**
    * @brief bidirectional_iterator wrapper for pointer
@@ -370,7 +387,7 @@ namespace __gnu_test
       --*this;
       return tmp;
     }
-   };
+  };
 
   /**
    * @brief random_access_iterator wrapper for pointer
@@ -498,7 +515,7 @@ namespace __gnu_test
     {
       return !(*this > in);
     }
-   };
+  };
 
   template<typename T>
     random_access_iterator_wrapper<T>