std::valarray man page

std::valarray< _Tp > — Smart array designed to support numeric processing.

Synopsis

Public Types

typedef _Tp value_type

Public Member Functions

valarray ()
Construct an empty array.
valarray (size_t)
Construct an array with n elements.
valarray (const _Tp &, size_t)
Construct an array with n elements initialized to t.
valarray (const _Tp *__restrict__, size_t)
Construct an array initialized to the first n elements of t.
valarray (const valarray &)
Copy constructor.
valarray (valarray &&) noexcept
Move constructor.
valarray (const slice_array< _Tp > &)
Construct an array with the same size and values in sa.
valarray (const gslice_array< _Tp > &)
Construct an array with the same size and values in ga.
valarray (const mask_array< _Tp > &)
Construct an array with the same size and values in ma.
valarray (const indirect_array< _Tp > &)
Construct an array with the same size and values in ia.
valarray (initializer_list< _Tp >)
Construct an array with an initializer_list of values.
template<class _Dom > valarray (const _Expr< _Dom, _Tp > &__e)

template<typename _Tp> valarray (const _Tp *__restrict__ __p, size_t __n)

_Expr< _ValFunClos< _ValArray, _Tp >, _Tp > apply (_Tp func(_Tp)) const
Apply a function to the array.
_Expr< _RefFunClos< _ValArray, _Tp >, _Tp > apply (_Tp func(const _Tp &)) const
Apply a function to the array.
valarray< _Tp > cshift (int __n) const
Return a rotated array.
_Tp max () const
Return the maximum element using operator<().
_Tp min () const
Return the minimum element using operator<().
valarray< _Tp > & operator &= (const _Tp &)
Set each element e of array to e & t.
valarray< _Tp > & operator &= (const valarray< _Tp > &)
Logical and corresponding elements of v with elements of array.
template<class _Dom > valarray< _Tp > & operator &= (const _Expr< _Dom, _Tp > &)

_UnaryOp< __logical_not >::_Rt operator! () const
Return a new valarray by applying unary ! to each element.
valarray< _Tp > & operator%= (const _Tp &)
Set each element e of array to e % t.
valarray< _Tp > & operator%= (const valarray< _Tp > &)
Modulo elements of array by corresponding elements of v.
template<class _Dom > valarray< _Tp > & operator%= (const _Expr< _Dom, _Tp > &)

valarray< _Tp > & operator*= (const _Tp &)
Multiply each element of array by t.
valarray< _Tp > & operator*= (const valarray< _Tp > &)
Multiply elements of array by corresponding elements of v.
template<class _Dom > valarray< _Tp > & operator*= (const _Expr< _Dom, _Tp > &)

_UnaryOp< __unary_plus >::_Rt operator+ () const
Return a new valarray by applying unary + to each element.
valarray< _Tp > & operator+= (const _Tp &)
Add t to each element of array.
valarray< _Tp > & operator+= (const valarray< _Tp > &)
Add corresponding elements of v to elements of array.
template<class _Dom > valarray< _Tp > & operator+= (const _Expr< _Dom, _Tp > &)

_UnaryOp< __negate >::_Rt operator- () const
Return a new valarray by applying unary - to each element.
valarray< _Tp > & operator-= (const _Tp &)
Subtract t to each element of array.
valarray< _Tp > & operator-= (const valarray< _Tp > &)
Subtract corresponding elements of v from elements of array.
template<class _Dom > valarray< _Tp > & operator-= (const _Expr< _Dom, _Tp > &)

valarray< _Tp > & operator/= (const _Tp &)
Divide each element of array by t.
valarray< _Tp > & operator/= (const valarray< _Tp > &)
Divide elements of array by corresponding elements of v.
template<class _Dom > valarray< _Tp > & operator/= (const _Expr< _Dom, _Tp > &)

valarray< _Tp > & operator<<= (const _Tp &)
Left shift each element e of array by t bits.
valarray< _Tp > & operator<<= (const valarray< _Tp > &)
Left shift elements of array by corresponding elements of v.
template<class _Dom > valarray< _Tp > & operator<<= (const _Expr< _Dom, _Tp > &)

valarray< _Tp > & operator= (const valarray< _Tp > &__v)
Assign elements to an array.
valarray< _Tp > & operator= (valarray< _Tp > &&__v) noexcept
Move assign elements to an array.
valarray< _Tp > & operator= (const _Tp &__t)
Assign elements to a value.
valarray< _Tp > & operator= (const slice_array< _Tp > &__sa)
Assign elements to an array subset.
valarray< _Tp > & operator= (const gslice_array< _Tp > &__ga)
Assign elements to an array subset.
valarray< _Tp > & operator= (const mask_array< _Tp > &__ma)
Assign elements to an array subset.
valarray< _Tp > & operator= (const indirect_array< _Tp > &__ia)
Assign elements to an array subset.
valarray & operator= (initializer_list< _Tp > __l)
Assign elements to an initializer_list.
template<class _Dom > valarray< _Tp > & operator= (const _Expr< _Dom, _Tp > &)

valarray< _Tp > & operator>>= (const _Tp &)
Right shift each element e of array by t bits.
valarray< _Tp > & operator>>= (const valarray< _Tp > &)
Right shift elements of array by corresponding elements of v.
template<class _Dom > valarray< _Tp > & operator>>= (const _Expr< _Dom, _Tp > &)

_Tp & operator[] (size_t __i)

const _Tp & operator[] (size_t) const

_Expr< _SClos< _ValArray, _Tp >, _Tp > operator[] (slice __s) const
Return an array subset.
slice_array< _Tp > operator[] (slice __s)
Return a reference to an array subset.
_Expr< _GClos< _ValArray, _Tp >, _Tp > operator[] (const gslice &__s) const
Return an array subset.
gslice_array< _Tp > operator[] (const gslice &__s)
Return a reference to an array subset.
valarray< _Tp > operator[] (const valarray< bool > &__m) const
Return an array subset.
mask_array< _Tp > operator[] (const valarray< bool > &__m)
Return a reference to an array subset.
_Expr< _IClos< _ValArray, _Tp >, _Tp > operator[] (const valarray< size_t > &__i) const
Return an array subset.
indirect_array< _Tp > operator[] (const valarray< size_t > &__i)
Return a reference to an array subset.
valarray< _Tp > & operator^= (const _Tp &)
Set each element e of array to e ^ t.
valarray< _Tp > & operator^= (const valarray< _Tp > &)
Logical xor corresponding elements of v with elements of array.
template<class _Dom > valarray< _Tp > & operator^= (const _Expr< _Dom, _Tp > &)

valarray< _Tp > & operator|= (const _Tp &)
Set each element e of array to e | t.
valarray< _Tp > & operator|= (const valarray< _Tp > &)
Logical or corresponding elements of v with elements of array.
template<class _Dom > valarray< _Tp > & operator|= (const _Expr< _Dom, _Tp > &)

_UnaryOp< __bitwise_not >::_Rt operator~ () const
Return a new valarray by applying unary ~ to each element.
void resize (size_t __size, _Tp __c=_Tp())
Resize array.
valarray< _Tp > shift (int __n) const
Return a shifted array.
size_t size () const
Return the number of elements in array.
_Tp sum () const
Return the sum of all elements in the array.
void swap (valarray< _Tp > &__v) noexcept
Swap.

Friends

class _Array< _Tp >

Detailed Description

template<class _Tp>

class std::valarray< _Tp >" Smart array designed to support numeric processing.

A valarray is an array that provides constraints intended to allow for effective optimization of numeric array processing by reducing the aliasing that can result from pointer representations. It represents a one-dimensional array from which different multidimensional subsets can be accessed and modified.

Template Parameters:

_Tp Type of object in the array.

Definition at line 78 of file valarray.

Constructor & Destructor Documentation

template<class _Tp> std::valarray< _Tp >::valarray (const _Tp * __restrict__, size_t)

Construct an array initialized to the first n elements of t.

Author

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Info

Fri Sep 16 2016 libstdc++