mir-algorithm — Libmir Archive

as

mir ndslice topology

Convenience function that creates a lazy view, where each element of the original slice is converted to the type T. It uses map and to  composition under the hood.

  1. auto as(Slice!(Iterator, N, kind) slice)
    template as(T)
    @fmamath
    @fmamath
    auto
    as
    (
    Iterator
    size_t N
    SliceKind kind
    )
    (
    Slice!(Iterator, N, kind) slice
    )
  2. auto as(S[] array)
  3. auto as(S withAsSlice)
  4. auto as(Range r)

Members

Functions

as
auto as(Slice!(Iterator, N, kind) slice)
auto as(S[] array)
auto as(S withAsSlice)
auto as(Range r)

Parameters

slice

a slice to create a view on.

Return Value

A lazy slice with elements converted to the type T.

Examples

import mir.ndslice.slice: Slice;
import mir.ndslice.allocation : slice;
import mir.ndslice.topology : diagonal, as;

auto matrix = slice!double([2, 2], 0);
auto stringMatrixView = matrix.as!int;
assert(stringMatrixView ==
        [[0, 0],
         [0, 0]]);

matrix.diagonal[] = 1;
assert(stringMatrixView ==
        [[1, 0],
         [0, 1]]);

/// allocate new slice composed of strings
Slice!(int*, 2) stringMatrix = stringMatrixView.slice;

Special behavior for pointers to a constant data.

import mir.ndslice.allocation : slice;
import mir.ndslice.slice: Contiguous, Slice;

Slice!(double*, 2)              matrix = slice!double([2, 2], 0);
Slice!(const(double)*, 2) const_matrix = matrix.as!(const double);

Ranges

import mir.algorithm.iteration: filter, equal;
assert(5.iota.filter!"a % 2".as!double.map!"a / 2".equal([0.5, 1.5]));

See Also

map, vmap

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