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std.algorithm.iteration.Permutations/permutations - multiple declarations

Function permutations

Lazily computes all permutations of r using Heap's algorithm.

Permutations!Range permutations(Range) (
  Range r
)
if (isRandomAccessRange!Range && hasLength!Range);

Parameters

NameDescription
Range the range type
r the random access range to find the permutations for.

Returns

A forward range of elements of which are an std.range.indexed view into r.

See Also

nextPermutation.

Example

import std.algorithm.comparison : equal;
import std.range : iota;
assert(equal!equal(iota(3).permutations,
    [[0, 1, 2],
     [1, 0, 2],
     [2, 0, 1],
     [0, 2, 1],
     [1, 2, 0],
     [2, 1, 0]]));

Struct Permutations

Lazily computes all permutations of r using Heap's algorithm.

struct Permutations(Range)
  
if (isRandomAccessRange!Range && hasLength!Range);

Constructors

NameDescription
this

Properties

NameTypeDescription
empty[get] bool
front[get] auto

Methods

NameDescription
popFront

Parameters

NameDescription
Range the range type
r the random access range to find the permutations for.

Returns

A forward range of elements of which are an std.range.indexed view into r.

See Also

nextPermutation.

Example

import std.algorithm.comparison : equal;
import std.range : iota;
assert(equal!equal(iota(3).permutations,
    [[0, 1, 2],
     [1, 0, 2],
     [2, 0, 1],
     [0, 2, 1],
     [1, 2, 0],
     [2, 1, 0]]));

Authors

Andrei Alexandrescu

License

Boost License 1.0.