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Enum `std.range.StoppingPolicy`

Dictates how iteration in a zip and lockstep should stop. By default stop at the end of the shortest of all ranges.


						
				enum StoppingPolicy
				 : int { ... }

Enum members

Name	Description
`longest`	Stop when the longest range is exhausted
`requireSameLength`	Require that all ranges are equal
`shortest`	Stop when the shortest range is exhausted

Example

import std.algorithm.comparison : equal;
import std.exception : assertThrown;
import std.range.primitives;
import std.typecons : tuple;

auto a = [1, 2, 3];
auto b = [4, 5, 6, 7];

auto shortest = zip(StoppingPolicy.shortest, a, b);
assert(shortest.equal([
    tuple(1, 4),
    tuple(2, 5),
    tuple(3, 6)
]));

auto longest = zip(StoppingPolicy.longest, a, b);
assert(longest.equal([
    tuple(1, 4),
    tuple(2, 5),
    tuple(3, 6),
    tuple(0, 7)
]));

auto same = zip(StoppingPolicy.requireSameLength, a, b);
same.popFrontN(3);
assertThrown!Exception(same.popFront);

Authors

Andrei Alexandrescu, David Simcha, Jonathan M Davis, and Jack Stouffer. Credit for some of the ideas in building this module goes to Leonardo Maffi.

License

Boost License 1.0.