std::mask_array< _Tp > Class Template Reference
Numerics » Numeric Arrays

## Public Types

typedef _Tp | value_type

## Public Member Functions

| mask_array (const mask_array &)
template<class _Dom >
void | operator%= (const _Expr< _Dom, _Tp > &) const
void | operator%= (const valarray< _Tp > &) const
template<class _Dom >
void | operator&= (const _Expr< _Dom, _Tp > &) const
void | operator&= (const valarray< _Tp > &) const
template<class _Dom >
void | operator*= (const _Expr< _Dom, _Tp > &) const
void | operator*= (const valarray< _Tp > &) const
template<class _Dom >
void | operator+= (const _Expr< _Dom, _Tp > &) const
void | operator+= (const valarray< _Tp > &) const
template<class _Dom >
void | operator-= (const _Expr< _Dom, _Tp > &) const
void | operator-= (const valarray< _Tp > &) const
template<class _Dom >
void | operator/= (const _Expr< _Dom, _Tp > &) const
void | operator/= (const valarray< _Tp > &) const
template<class _Dom >
void | operator<<= (const _Expr< _Dom, _Tp > &) const
void | operator<<= (const valarray< _Tp > &) const
template<class _Dom >
void | operator= (const _Expr< _Dom, _Tp > &) const
template<class _Ex >
void | operator= (const _Expr< _Ex, _Tp > &__e) const
void | operator= (const _Tp &) const
mask_array & | operator= (const mask_array &)
void | operator= (const valarray< _Tp > &) const
template<class _Dom >
void | operator>>= (const _Expr< _Dom, _Tp > &) const
void | operator>>= (const valarray< _Tp > &) const
template<class _Dom >
void | operator^= (const _Expr< _Dom, _Tp > &) const
void | operator^= (const valarray< _Tp > &) const
template<class _Dom >
void | operator|= (const _Expr< _Dom, _Tp > &) const
void | operator|= (const valarray< _Tp > &) const

## Friends

class | valarray< _Tp >

## Detailed Description

### template<class _Tp>
class std::mask_array< _Tp >

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 83 of file valarray.

The documentation for this class was generated from the following files:

- valarray
- mask_array.h