// The template and inlines for the -*- C++ -*- valarray class.
-// Copyright (C) 1997-2015 Free Software Foundation, Inc.
+// Copyright (C) 1997-2024 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
// <http://www.gnu.org/licenses/>.
/** @file include/valarray
- * This is a Standard C++ Library header.
+ * This is a Standard C++ Library header.
*/
// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
#pragma GCC system_header
+#include <bits/requires_hosted.h> // <cmath> dependant
+
#include <bits/c++config.h>
#include <cmath>
#include <algorithm>
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
- template<class _Clos, typename _Tp>
+ template<class _Clos, typename _Tp>
class _Expr;
- template<typename _Tp1, typename _Tp2>
- class _ValArray;
+ template<typename _Tp1, typename _Tp2>
+ class _ValArray;
+namespace __detail
+{
template<class _Oper, template<class, class> class _Meta, class _Dom>
struct _UnClos;
template<class _Oper,
template<class, class> class _Meta1,
template<class, class> class _Meta2,
- class _Dom1, class _Dom2>
- class _BinClos;
-
- template<template<class, class> class _Meta, class _Dom>
- class _SClos;
-
- template<template<class, class> class _Meta, class _Dom>
- class _GClos;
-
- template<template<class, class> class _Meta, class _Dom>
- class _IClos;
-
- template<template<class, class> class _Meta, class _Dom>
- class _ValFunClos;
-
- template<template<class, class> class _Meta, class _Dom>
- class _RefFunClos;
+ class _Dom1, class _Dom2>
+ struct _BinClos;
+
+ template<template<class, class> class _Meta, class _Dom>
+ struct _SClos;
+
+ template<template<class, class> class _Meta, class _Dom>
+ struct _GClos;
+
+ template<template<class, class> class _Meta, class _Dom>
+ struct _IClos;
+
+ template<template<class, class> class _Meta, class _Dom>
+ struct _ValFunClos;
+
+ template<template<class, class> class _Meta, class _Dom>
+ struct _RefFunClos;
+} // namespace __detail
+
+ using __detail::_UnClos;
+ using __detail::_BinClos;
+ using __detail::_SClos;
+ using __detail::_GClos;
+ using __detail::_IClos;
+ using __detail::_ValFunClos;
+ using __detail::_RefFunClos;
template<class _Tp> class valarray; // An array of type _Tp
class slice; // BLAS-like slice out of an array
#include <bits/valarray_array.h>
#include <bits/valarray_before.h>
-
+
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
* aliasing that can result from pointer representations. It represents a
* one-dimensional array from which different multidimensional subsets can
* be accessed and modified.
- *
+ *
* @tparam _Tp Type of object in the array.
*/
- template<class _Tp>
+ template<class _Tp>
class valarray
{
template<class _Op>
- struct _UnaryOp
+ struct _UnaryOp
{
typedef typename __fun<_Op, _Tp>::result_type __rt;
typedef _Expr<_UnClos<_Op, _ValArray, _Tp>, __rt> _Rt;
};
public:
typedef _Tp value_type;
-
+
// _lib.valarray.cons_ construct/destroy:
/// Construct an empty array.
- valarray();
+ valarray() _GLIBCXX_NOTHROW;
/// Construct an array with @a n elements.
explicit valarray(size_t);
// _lib.valarray.access_ element access:
/**
- * Return a reference to the i'th array element.
+ * Return a reference to the i'th array element.
*
* @param __i Index of element to return.
* @return Reference to the i'th element.
*/
- _Tp& operator[](size_t __i);
+ _Tp& operator[](size_t __i) _GLIBCXX_NOTHROW;
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 389. Const overload of valarray::operator[] returns by value.
- const _Tp& operator[](size_t) const;
+ const _Tp& operator[](size_t) const _GLIBCXX_NOTHROW;
// _lib.valarray.sub_ subset operations:
/**
_Tp sum() const;
/// Return the minimum element using operator<().
- _Tp min() const;
+ _Tp min() const;
/// Return the maximum element using operator<().
- _Tp max() const;
+ _Tp max() const;
/**
* @brief Return a shifted array.
* @brief Apply a function to the array.
*
* Returns a new valarray with elements assigned to the result of
- * applying func to the corresponding element of this array. The new
+ * applying __func to the corresponding element of this array. The new
* array has the same size as this one.
*
- * @param func Function of Tp returning Tp to apply.
+ * @param __func Function of Tp returning Tp to apply.
* @return New valarray with transformed elements.
*/
- _Expr<_ValFunClos<_ValArray, _Tp>, _Tp> apply(_Tp func(_Tp)) const;
+ _Expr<_ValFunClos<_ValArray, _Tp>, _Tp> apply(_Tp __func(_Tp)) const;
/**
* @brief Apply a function to the array.
*
* Returns a new valarray with elements assigned to the result of
- * applying func to the corresponding element of this array. The new
+ * applying __func to the corresponding element of this array. The new
* array has the same size as this one.
*
- * @param func Function of const Tp& returning Tp to apply.
+ * @param __func Function of const Tp& returning Tp to apply.
* @return New valarray with transformed elements.
*/
- _Expr<_RefFunClos<_ValArray, _Tp>, _Tp> apply(_Tp func(const _Tp&)) const;
+ _Expr<_RefFunClos<_ValArray, _Tp>, _Tp> apply(_Tp __func(const _Tp&)) const;
/**
* @brief Resize array.
private:
size_t _M_size;
_Tp* __restrict__ _M_data;
-
- friend class _Array<_Tp>;
+
+ friend struct _Array<_Tp>;
};
-
+
+#if __cpp_deduction_guides >= 201606
+ template<typename _Tp, size_t _Nm>
+ valarray(const _Tp(&)[_Nm], size_t) -> valarray<_Tp>;
+#endif
+
template<typename _Tp>
inline const _Tp&
- valarray<_Tp>::operator[](size_t __i) const
- {
+ valarray<_Tp>::operator[](size_t __i) const _GLIBCXX_NOTHROW
+ {
__glibcxx_requires_subscript(__i);
return _M_data[__i];
}
template<typename _Tp>
inline _Tp&
- valarray<_Tp>::operator[](size_t __i)
- {
+ valarray<_Tp>::operator[](size_t __i) _GLIBCXX_NOTHROW
+ {
__glibcxx_requires_subscript(__i);
return _M_data[__i];
}
- // @} group numeric_arrays
+ /// @} group numeric_arrays
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
template<typename _Tp>
inline
- valarray<_Tp>::valarray() : _M_size(0), _M_data(0) {}
+ valarray<_Tp>::valarray() _GLIBCXX_NOTHROW : _M_size(0), _M_data(0) {}
template<typename _Tp>
- inline
- valarray<_Tp>::valarray(size_t __n)
+ inline
+ valarray<_Tp>::valarray(size_t __n)
: _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
{ std::__valarray_default_construct(_M_data, _M_data + __n); }
inline
valarray<_Tp>::valarray(const _Tp* __restrict__ __p, size_t __n)
: _M_size(__n), _M_data(__valarray_get_storage<_Tp>(__n))
- {
- _GLIBCXX_DEBUG_ASSERT(__p != 0 || __n == 0);
- std::__valarray_copy_construct(__p, __p + __n, _M_data);
+ {
+ __glibcxx_assert(__p != 0 || __n == 0);
+ std::__valarray_copy_construct(__p, __p + __n, _M_data);
}
template<typename _Tp>
inline valarray<_Tp>&
valarray<_Tp>::operator=(const slice_array<_Tp>& __sa)
{
- _GLIBCXX_DEBUG_ASSERT(_M_size == __sa._M_sz);
+ __glibcxx_assert(_M_size == __sa._M_sz);
std::__valarray_copy(__sa._M_array, __sa._M_sz,
__sa._M_stride, _Array<_Tp>(_M_data));
return *this;
inline valarray<_Tp>&
valarray<_Tp>::operator=(const gslice_array<_Tp>& __ga)
{
- _GLIBCXX_DEBUG_ASSERT(_M_size == __ga._M_index.size());
+ __glibcxx_assert(_M_size == __ga._M_index.size());
std::__valarray_copy(__ga._M_array, _Array<size_t>(__ga._M_index),
_Array<_Tp>(_M_data), _M_size);
return *this;
inline valarray<_Tp>&
valarray<_Tp>::operator=(const mask_array<_Tp>& __ma)
{
- _GLIBCXX_DEBUG_ASSERT(_M_size == __ma._M_sz);
+ __glibcxx_assert(_M_size == __ma._M_sz);
std::__valarray_copy(__ma._M_array, __ma._M_mask,
_Array<_Tp>(_M_data), _M_size);
return *this;
inline valarray<_Tp>&
valarray<_Tp>::operator=(const indirect_array<_Tp>& __ia)
{
- _GLIBCXX_DEBUG_ASSERT(_M_size == __ia._M_sz);
+ __glibcxx_assert(_M_size == __ia._M_sz);
std::__valarray_copy(__ia._M_array, __ia._M_index,
_Array<_Tp>(_M_data), _M_size);
return *this;
size_t __e = __m.size();
for (size_t __i=0; __i<__e; ++__i)
if (__m[__i]) ++__s;
+ __glibcxx_assert(__s <= _M_size);
return valarray<_Tp>(mask_array<_Tp>(_Array<_Tp>(_M_data), __s,
_Array<bool> (__m)));
}
size_t __e = __m.size();
for (size_t __i=0; __i<__e; ++__i)
if (__m[__i]) ++__s;
+ __glibcxx_assert(__s <= _M_size);
return mask_array<_Tp>(_Array<_Tp>(_M_data), __s, _Array<bool>(__m));
}
#endif
template<class _Tp>
- inline size_t
+ inline size_t
valarray<_Tp>::size() const
{ return _M_size; }
inline _Tp
valarray<_Tp>::sum() const
{
- _GLIBCXX_DEBUG_ASSERT(_M_size > 0);
+ __glibcxx_assert(_M_size > 0);
return std::__valarray_sum(_M_data, _M_data + _M_size);
}
}
std::__valarray_fill_construct(_M_data, _M_data + __n, __c);
}
-
+
template<typename _Tp>
inline _Tp
valarray<_Tp>::min() const
{
- _GLIBCXX_DEBUG_ASSERT(_M_size > 0);
+ __glibcxx_assert(_M_size > 0);
return *std::min_element(_M_data, _M_data + _M_size);
}
inline _Tp
valarray<_Tp>::max() const
{
- _GLIBCXX_DEBUG_ASSERT(_M_size > 0);
+ __glibcxx_assert(_M_size > 0);
return *std::max_element(_M_data, _M_data + _M_size);
}
-
+
template<class _Tp>
inline _Expr<_ValFunClos<_ValArray, _Tp>, _Tp>
- valarray<_Tp>::apply(_Tp func(_Tp)) const
+ valarray<_Tp>::apply(_Tp __func(_Tp)) const
{
typedef _ValFunClos<_ValArray, _Tp> _Closure;
- return _Expr<_Closure, _Tp>(_Closure(*this, func));
+ return _Expr<_Closure, _Tp>(_Closure(*this, __func));
}
template<class _Tp>
inline _Expr<_RefFunClos<_ValArray, _Tp>, _Tp>
- valarray<_Tp>::apply(_Tp func(const _Tp &)) const
+ valarray<_Tp>::apply(_Tp __func(const _Tp &)) const
{
typedef _RefFunClos<_ValArray, _Tp> _Closure;
- return _Expr<_Closure, _Tp>(_Closure(*this, func));
+ return _Expr<_Closure, _Tp>(_Closure(*this, __func));
}
+ /// @cond undocumented
#define _DEFINE_VALARRAY_UNARY_OPERATOR(_Op, _Name) \
template<typename _Tp> \
- inline typename valarray<_Tp>::template _UnaryOp<_Name>::_Rt \
+ inline typename valarray<_Tp>::template _UnaryOp<_Name>::_Rt \
valarray<_Tp>::operator _Op() const \
{ \
- typedef _UnClos<_Name, _ValArray, _Tp> _Closure; \
- typedef typename __fun<_Name, _Tp>::result_type _Rt; \
+ typedef _UnClos<_Name, _ValArray, _Tp> _Closure; \
+ typedef typename __fun<_Name, _Tp>::result_type _Rt; \
return _Expr<_Closure, _Rt>(_Closure(*this)); \
}
inline valarray<_Tp>& \
valarray<_Tp>::operator _Op##=(const valarray<_Tp> &__v) \
{ \
- _GLIBCXX_DEBUG_ASSERT(_M_size == __v._M_size); \
+ __glibcxx_assert(_M_size == __v._M_size); \
_Array_augmented_##_Name(_Array<_Tp>(_M_data), _M_size, \
_Array<_Tp>(__v._M_data)); \
return *this; \
_DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT(>>, __shift_right)
#undef _DEFINE_VALARRAY_EXPR_AUGMENTED_ASSIGNMENT
-
+
#define _DEFINE_BINARY_OPERATOR(_Op, _Name) \
template<typename _Tp> \
- inline _Expr<_BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp>, \
- typename __fun<_Name, _Tp>::result_type> \
+ inline _Expr<_BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp>, \
+ typename __fun<_Name, _Tp>::result_type> \
operator _Op(const valarray<_Tp>& __v, const valarray<_Tp>& __w) \
{ \
- _GLIBCXX_DEBUG_ASSERT(__v.size() == __w.size()); \
- typedef _BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp> _Closure; \
- typedef typename __fun<_Name, _Tp>::result_type _Rt; \
- return _Expr<_Closure, _Rt>(_Closure(__v, __w)); \
+ __glibcxx_assert(__v.size() == __w.size()); \
+ typedef _BinClos<_Name, _ValArray, _ValArray, _Tp, _Tp> _Closure; \
+ typedef typename __fun<_Name, _Tp>::result_type _Rt; \
+ return _Expr<_Closure, _Rt>(_Closure(__v, __w)); \
} \
\
template<typename _Tp> \
- inline _Expr<_BinClos<_Name, _ValArray,_Constant, _Tp, _Tp>, \
- typename __fun<_Name, _Tp>::result_type> \
- operator _Op(const valarray<_Tp>& __v, const _Tp& __t) \
+ inline _Expr<_BinClos<_Name, _ValArray,_Constant, _Tp, _Tp>, \
+ typename __fun<_Name, _Tp>::result_type> \
+ operator _Op(const valarray<_Tp>& __v, \
+ const typename valarray<_Tp>::value_type& __t) \
{ \
typedef _BinClos<_Name, _ValArray, _Constant, _Tp, _Tp> _Closure; \
- typedef typename __fun<_Name, _Tp>::result_type _Rt; \
- return _Expr<_Closure, _Rt>(_Closure(__v, __t)); \
+ typedef typename __fun<_Name, _Tp>::result_type _Rt; \
+ return _Expr<_Closure, _Rt>(_Closure(__v, __t)); \
} \
\
template<typename _Tp> \
- inline _Expr<_BinClos<_Name, _Constant, _ValArray, _Tp, _Tp>, \
- typename __fun<_Name, _Tp>::result_type> \
- operator _Op(const _Tp& __t, const valarray<_Tp>& __v) \
+ inline _Expr<_BinClos<_Name, _Constant, _ValArray, _Tp, _Tp>, \
+ typename __fun<_Name, _Tp>::result_type> \
+ operator _Op(const typename valarray<_Tp>::value_type& __t, \
+ const valarray<_Tp>& __v) \
{ \
- typedef _BinClos<_Name, _Constant, _ValArray, _Tp, _Tp> _Closure; \
- typedef typename __fun<_Name, _Tp>::result_type _Rt; \
- return _Expr<_Closure, _Rt>(_Closure(__t, __v)); \
+ typedef _BinClos<_Name, _Constant, _ValArray, _Tp, _Tp> _Closure; \
+ typedef typename __fun<_Name, _Tp>::result_type _Rt; \
+ return _Expr<_Closure, _Rt>(_Closure(__t, __v)); \
}
_DEFINE_BINARY_OPERATOR(+, __plus)
_DEFINE_BINARY_OPERATOR(>=, __greater_equal)
#undef _DEFINE_BINARY_OPERATOR
+ /// @endcond
#if __cplusplus >= 201103L
/**
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline _Tp*
- begin(valarray<_Tp>& __va)
- { return std::__addressof(__va[0]); }
+ begin(valarray<_Tp>& __va) noexcept
+ { return __va.size() ? std::__addressof(__va[0]) : nullptr; }
/**
* @brief Return an iterator pointing to the first element of
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline const _Tp*
- begin(const valarray<_Tp>& __va)
- { return std::__addressof(__va[0]); }
+ begin(const valarray<_Tp>& __va) noexcept
+ { return __va.size() ? std::__addressof(__va[0]) : nullptr; }
/**
* @brief Return an iterator pointing to one past the last element of
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline _Tp*
- end(valarray<_Tp>& __va)
- { return std::__addressof(__va[0]) + __va.size(); }
+ end(valarray<_Tp>& __va) noexcept
+ {
+ if (auto __n = __va.size())
+ return std::__addressof(__va[0]) + __n;
+ else
+ return nullptr;
+ }
/**
* @brief Return an iterator pointing to one past the last element of
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline const _Tp*
- end(const valarray<_Tp>& __va)
- { return std::__addressof(__va[0]) + __va.size(); }
+ end(const valarray<_Tp>& __va) noexcept
+ {
+ if (auto __n = __va.size())
+ return std::__addressof(__va[0]) + __n;
+ else
+ return nullptr;
+ }
#endif // C++11
- // @} group numeric_arrays
+ /// @} group numeric_arrays
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
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