typedef typename iterator_traits<_ForwardIterator>::value_type
_ValueType;
- std::fill(__first, __last, _ValueType());
+ if (__first == __last)
+ return;
+
+ typename iterator_traits<_ForwardIterator>::value_type* __val
+ = std::__addressof(*__first);
+ std::_Construct(__val);
+ if (++__first != __last)
+ std::fill(__first, __last, *__val);
}
};
static _ForwardIterator
__uninit_default_n(_ForwardIterator __first, _Size __n)
{
- typedef typename iterator_traits<_ForwardIterator>::value_type
- _ValueType;
-
- return std::fill_n(__first, __n, _ValueType());
+ if (__n > 0)
+ {
+ typename iterator_traits<_ForwardIterator>::value_type* __val
+ = std::__addressof(*__first);
+ std::_Construct(__val);
+ ++__first;
+ __first = std::fill_n(__first, __n - 1, *__val);
+ }
+ return __first;
}
};
// __uninitialized_default
- // Fills [first, last) with std::distance(first, last) default
- // constructed value_types(s).
+ // Fills [first, last) with value-initialized value_types.
template<typename _ForwardIterator>
inline void
__uninitialized_default(_ForwardIterator __first,
}
// __uninitialized_default_n
- // Fills [first, first + n) with n default constructed value_type(s).
+ // Fills [first, first + n) with value-initialized value_types.
template<typename _ForwardIterator, typename _Size>
inline _ForwardIterator
__uninitialized_default_n(_ForwardIterator __first, _Size __n)
// __uninitialized_default_a
- // Fills [first, last) with std::distance(first, last) default
- // constructed value_types(s), constructed with the allocator alloc.
+ // Fills [first, last) with value_types constructed by the allocator
+ // alloc, with no arguments passed to the construct call.
template<typename _ForwardIterator, typename _Allocator>
void
__uninitialized_default_a(_ForwardIterator __first,
// __uninitialized_default_n_a
- // Fills [first, first + n) with n default constructed value_types(s),
- // constructed with the allocator alloc.
+ // Fills [first, first + n) with value_types constructed by the allocator
+ // alloc, with no arguments passed to the construct call.
template<typename _ForwardIterator, typename _Size, typename _Allocator>
_ForwardIterator
__uninitialized_default_n_a(_ForwardIterator __first, _Size __n,
}
}
+ // __uninitialized_default_n_a specialization for std::allocator,
+ // which ignores the allocator and value-initializes the elements.
template<typename _ForwardIterator, typename _Size, typename _Tp>
inline _ForwardIterator
__uninitialized_default_n_a(_ForwardIterator __first, _Size __n,
};
// __uninitialized_default_novalue
- // Fills [first, last) with std::distance(first, last) default-initialized
- // value_types(s).
+ // Fills [first, last) with default-initialized value_types.
template<typename _ForwardIterator>
inline void
__uninitialized_default_novalue(_ForwardIterator __first,
__uninit_default_novalue(__first, __last);
}
- // __uninitialized_default_n
- // Fills [first, first + n) with n default-initialized value_type(s).
+ // __uninitialized_default_novalue_n
+ // Fills [first, first + n) with default-initialized value_types.
template<typename _ForwardIterator, typename _Size>
inline _ForwardIterator
__uninitialized_default_novalue_n(_ForwardIterator __first, _Size __n)
--- /dev/null
+// Copyright (C) 2020 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 run { target { c++11 && { ! simulator } } } }
+
+#include <memory>
+#include <testsuite_hooks.h>
+
+// Assume that 9MB is larger than the stack limit.
+struct X { char data[9*1024*1024]; };
+
+static_assert( std::is_trivial<X>::value, "" );
+
+int main()
+{
+ auto mem = new char[sizeof(X) * 2];
+ auto p = reinterpret_cast<X*>(mem);
+ std::__uninitialized_default(p, p + 2);
+ delete[] mem;
+}
--- /dev/null
+// Copyright (C) 2020 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 run { target { c++11 && { ! simulator } } } }
+
+#include <memory>
+#include <testsuite_hooks.h>
+
+// Assume that 9MB is larger than the stack limit.
+struct X { char data[9*1024*1024]; };
+
+static_assert( std::is_trivial<X>::value, "" );
+
+int main()
+{
+ auto mem = new char[sizeof(X) * 2];
+ auto p = reinterpret_cast<X*>(mem);
+ std::__uninitialized_default_n(p, 2);
+ delete[] mem;
+}
--- /dev/null
+// Copyright (C) 2020 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-options "-std=gnu++17" }
+// { dg-do run { target { c++17 && { ! simulator } } } }
+
+#include <memory>
+#include <testsuite_hooks.h>
+
+// Assume that 9MB is larger than the stack limit.
+struct X { char data[9*1024*1024]; };
+
+static_assert( std::is_trivial_v<X> );
+
+int main()
+{
+ auto mem = new char[sizeof(X) * 2];
+ auto p = reinterpret_cast<X*>(mem);
+ std::uninitialized_value_construct(p, p + 2);
+ delete[] mem;
+}
--- /dev/null
+// Copyright (C) 2020 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-options "-std=gnu++17" }
+// { dg-do run { target { c++17 && { ! simulator } } } }
+
+#include <memory>
+#include <testsuite_hooks.h>
+
+// Assume that 9MB is larger than the stack limit.
+struct X { char data[9*1024*1024]; };
+
+static_assert( std::is_trivial_v<X> );
+
+int main()
+{
+ auto mem = new char[sizeof(X) * 2];
+ std::uninitialized_value_construct_n(reinterpret_cast<X*>(mem), 2);
+ delete[] mem;
+}
--- /dev/null
+// Copyright (C) 2020 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 run { target { c++11 && { ! simulator } } } }
+
+#include <vector>
+#include <testsuite_hooks.h>
+
+// Assume that 9MB is larger than the stack limit.
+struct X { char data[9*1024*1024]; };
+
+static_assert( std::is_trivial<X>::value, "" );
+
+int main()
+{
+ std::vector<X> v(1);
+ VERIFY( v.size() == 1 );
+ v.clear();
+ v.resize(2);
+ VERIFY( v.size() == 2 );
+}
projects / gcc.git / commitdiff