1b749ae95e
Store nested closures by value not by reference, to prevent holding invalid references to temporaries that have been destroyed. This changes the layout of the closure types, so change their linkage names, but moving them to a different namespace. PR libstdc++/57997 PR libstdc++/83860 * include/bits/gslice_array.h (gslice_array): Define default constructor as deleted, as per C++11 standard. * include/bits/mask_array.h (mask_array): Likewise. * include/bits/slice_array.h (slice_array): Likewise. * include/bits/valarray_after.h (_GBase, _GClos, _IBase, _IClos): Move to namespace __detail. (_GBase::_M_expr, _IBase::_M_expr): Use _ValArrayRef for type of data members. * include/bits/valarray_before.h (_ValArrayRef): New helper for type of data members in closure objects. (_FunBase, _ValFunClos, _RefFunClos, _UnBase, _UnClos, _BinBase) (_BinBase2, _BinBase1, _BinClos, _SBase, _SClos): Move to namespace __detail. (_FunBase::_M_expr, _UnBase::_M_expr, _BinBase::_M_expr1) (_BinBase::_M_expr2, _BinBase2::_M_expr1, _BinBase1::_M_expr2) (_SBase::_M_expr): Use _ValArrayRef for type of data members. * include/std/valarray (_UnClos, _BinClos, _SClos, _GClos, _IClos) (_ValFunClos, _RefFunClos): Move to namespace __detail and add using-declarations to namespace std. * testsuite/26_numerics/valarray/83860.cc: New. From-SVN: r259844
214 lines
7.5 KiB
C++
214 lines
7.5 KiB
C++
// The template and inlines for the -*- C++ -*- mask_array class.
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// Copyright (C) 1997-2018 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/mask_array.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{valarray}
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*/
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// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
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#ifndef _MASK_ARRAY_H
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#define _MASK_ARRAY_H 1
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#pragma GCC system_header
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @addtogroup numeric_arrays
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* @{
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*/
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/**
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* @brief Reference to selected subset of an array.
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*
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* A mask_array is a reference to the actual elements of an array specified
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* by a bitmask in the form of an array of bool. The way to get a
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* mask_array is to call operator[](valarray<bool>) on a valarray. The
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* returned mask_array then permits carrying operations out on the
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* referenced subset of elements in the original valarray.
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*
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* For example, if a mask_array is obtained using the array (false, true,
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* false, true) as an argument, the mask array has two elements referring
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* to array[1] and array[3] in the underlying array.
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*
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* @param Tp Element type.
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*/
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template <class _Tp>
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class mask_array
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{
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public:
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typedef _Tp value_type;
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 253. valarray helper functions are almost entirely useless
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/// Copy constructor. Both slices refer to the same underlying array.
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mask_array (const mask_array&);
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/// Assignment operator. Assigns elements to corresponding elements
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/// of @a a.
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mask_array& operator=(const mask_array&);
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void operator=(const valarray<_Tp>&) const;
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/// Multiply slice elements by corresponding elements of @a v.
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void operator*=(const valarray<_Tp>&) const;
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/// Divide slice elements by corresponding elements of @a v.
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void operator/=(const valarray<_Tp>&) const;
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/// Modulo slice elements by corresponding elements of @a v.
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void operator%=(const valarray<_Tp>&) const;
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/// Add corresponding elements of @a v to slice elements.
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void operator+=(const valarray<_Tp>&) const;
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/// Subtract corresponding elements of @a v from slice elements.
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void operator-=(const valarray<_Tp>&) const;
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/// Logical xor slice elements with corresponding elements of @a v.
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void operator^=(const valarray<_Tp>&) const;
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/// Logical and slice elements with corresponding elements of @a v.
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void operator&=(const valarray<_Tp>&) const;
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/// Logical or slice elements with corresponding elements of @a v.
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void operator|=(const valarray<_Tp>&) const;
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/// Left shift slice elements by corresponding elements of @a v.
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void operator<<=(const valarray<_Tp>&) const;
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/// Right shift slice elements by corresponding elements of @a v.
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void operator>>=(const valarray<_Tp>&) const;
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/// Assign all slice elements to @a t.
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void operator=(const _Tp&) const;
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// ~mask_array ();
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template<class _Dom>
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void operator=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator*=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator/=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator%=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator+=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator-=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator^=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator&=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator|=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator<<=(const _Expr<_Dom,_Tp>&) const;
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template<class _Dom>
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void operator>>=(const _Expr<_Dom,_Tp>&) const;
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private:
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mask_array(_Array<_Tp>, size_t, _Array<bool>);
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friend class valarray<_Tp>;
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const size_t _M_sz;
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const _Array<bool> _M_mask;
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const _Array<_Tp> _M_array;
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#if __cplusplus < 201103L
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// not implemented
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mask_array();
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#else
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public:
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mask_array() = delete;
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#endif
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};
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template<typename _Tp>
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inline mask_array<_Tp>::mask_array(const mask_array<_Tp>& __a)
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: _M_sz(__a._M_sz), _M_mask(__a._M_mask), _M_array(__a._M_array) {}
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template<typename _Tp>
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inline
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mask_array<_Tp>::mask_array(_Array<_Tp> __a, size_t __s, _Array<bool> __m)
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: _M_sz(__s), _M_mask(__m), _M_array(__a) {}
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template<typename _Tp>
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inline mask_array<_Tp>&
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mask_array<_Tp>::operator=(const mask_array<_Tp>& __a)
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{
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std::__valarray_copy(__a._M_array, __a._M_mask,
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_M_sz, _M_array, _M_mask);
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return *this;
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}
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template<typename _Tp>
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inline void
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mask_array<_Tp>::operator=(const _Tp& __t) const
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{ std::__valarray_fill(_M_array, _M_sz, _M_mask, __t); }
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template<typename _Tp>
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inline void
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mask_array<_Tp>::operator=(const valarray<_Tp>& __v) const
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{ std::__valarray_copy(_Array<_Tp>(__v), __v.size(), _M_array, _M_mask); }
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template<typename _Tp>
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template<class _Ex>
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inline void
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mask_array<_Tp>::operator=(const _Expr<_Ex, _Tp>& __e) const
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{ std::__valarray_copy(__e, __e.size(), _M_array, _M_mask); }
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#undef _DEFINE_VALARRAY_OPERATOR
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#define _DEFINE_VALARRAY_OPERATOR(_Op, _Name) \
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template<typename _Tp> \
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inline void \
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mask_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const \
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{ \
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_Array_augmented_##_Name(_M_array, _M_mask, \
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_Array<_Tp>(__v), __v.size()); \
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} \
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\
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template<typename _Tp> \
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template<class _Dom> \
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inline void \
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mask_array<_Tp>::operator _Op##=(const _Expr<_Dom, _Tp>& __e) const\
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{ \
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_Array_augmented_##_Name(_M_array, _M_mask, __e, __e.size()); \
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}
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_DEFINE_VALARRAY_OPERATOR(*, __multiplies)
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_DEFINE_VALARRAY_OPERATOR(/, __divides)
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_DEFINE_VALARRAY_OPERATOR(%, __modulus)
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_DEFINE_VALARRAY_OPERATOR(+, __plus)
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_DEFINE_VALARRAY_OPERATOR(-, __minus)
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_DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
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_DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
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_DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
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_DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
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_DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
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#undef _DEFINE_VALARRAY_OPERATOR
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// @} group numeric_arrays
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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#endif /* _MASK_ARRAY_H */
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