libstdc++
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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.
Tp | Element type. |
std::mask_array::mask_array | ( | const mask_array & | ) |
Copy constructor. Both slices refer to the same underlying array.
mask_array& std::mask_array::operator= | ( | const mask_array & | ) |
Assignment operator. Assigns elements to corresponding elements of a.