man std::mask_array (Fonctions bibliothèques) - Reference to selected subset of an array.
NAME
std::mask_array - Reference to selected subset of an array.
SYNOPSIS
#include <valarray>
Public Types
typedef Type value_type
Public Member Functions
mask_array (const mask_array &)
Copy constructor. Both slices refer to the same underlying array.
mask_array & operator= (const mask_array &)
of a.
void operator= (const valarray< Type > &) const
void operator *= (const valarray< Type > &) const
Multiply slice elements by corresponding elements of v.
void operator/= (const valarray< Type > &) const
Divide slice elements by corresponding elements of v.
void operator%= (const valarray< Type > &) const
Modulo slice elements by corresponding elements of v.
void operator+= (const valarray< Type > &) const
Add corresponding elements of v to slice elements.
void operator-= (const valarray< Type > &) const
Subtract corresponding elements of v from slice elements.
void operator^= (const valarray< Type > &) const
Logical xor slice elements with corresponding elements of v.
void operator &= (const valarray< Type > &) const
Logical and slice elements with corresponding elements of v.
void operator|= (const valarray< Type > &) const
Logical or slice elements with corresponding elements of v.
void operator<<= (const valarray< Type > &) const
Left shift slice elements by corresponding elements of v.
void operator>>= (const valarray< Type > &) const
Right shift slice elements by corresponding elements of v.
void operator= (const Type &) const
Assign all slice elements to t.
template<class Dom> void operator= (const Expr< Dom, Type > &) const
template<typename Type> mask_array< Type > & operator= (const mask_array< Type > &a)
Private Member Functions
mask_array (Array< Type >, size_t, Array< bool >)
Private Attributes
const size_t M_sz
const Array< bool > M_mask
const Array< Type > M_array
Friends
class valarray< Type >
Detailed Description
template<class Type> class std::mask_array< Type >
Reference to selected subset of an array.
A mask_array is a reference to the actual elements of an array specified by a bitmask in the form of an array of bool. The way to get a mask_array is to call operator[](valarray<bool>) on a valarray. The returned mask_array then permits carrying operations out on the referenced subset of elements in the original valarray.
For example, if a mask_array is obtained using the array (false, true, false, true) as an argument, the mask array has two elements referring to array[1] and array[3] in the underlying array.
Parameters: Tp Element type.
Definition at line 61 of file valarray.
Constructor & Destructor Documentation
template<class Type> std::mask_array< Type >::mask_array (const mask_array< Type > &)
Copy constructor. Both slices refer to the same underlying array.
Member Function Documentation
template<class Type> void std::mask_array< Type >::operator &= (const valarray< Type > &) const
Logical and slice elements with corresponding elements of v.
template<class Type> void std::mask_array< Type >::operator *= (const valarray< Type > &) const
Multiply slice elements by corresponding elements of v.
template<class Type> void std::mask_array< Type >::operator%= (const valarray< Type > &) const
Modulo slice elements by corresponding elements of v.
template<class Type> void std::mask_array< Type >::operator+= (const valarray< Type > &) const
Add corresponding elements of v to slice elements.
template<class Type> void std::mask_array< Type >::operator-= (const valarray< Type > &) const
Subtract corresponding elements of v from slice elements.
template<class Type> void std::mask_array< Type >::operator/= (const valarray< Type > &) const
Divide slice elements by corresponding elements of v.
template<class Type> void std::mask_array< Type >::operator<<= (const valarray< Type > &) const
Left shift slice elements by corresponding elements of v.
template<typename Type> void std::mask_array< Type >::operator= (const Type &) const [inline]
Assign all slice elements to t.
Definition at line 158 of file valarray.
References std::__valarray_fill().
template<class Type> mask_array& std::mask_array< Type >::operator= (const mask_array< Type > &)
of a.
template<class Type> void std::mask_array< Type >::operator>>= (const valarray< Type > &) const
Right shift slice elements by corresponding elements of v.
template<class Type> void std::mask_array< Type >::operator^= (const valarray< Type > &) const
Logical xor slice elements with corresponding elements of v.
template<class Type> void std::mask_array< Type >::operator|= (const valarray< Type > &) const
Logical or slice elements with corresponding elements of v.
Author
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