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Template `std.algorithm.sorting.multiSort`

Sorts a range by multiple keys. The call multiSort!("a.id < b.id", "a.date > b.date")(r) sorts the range r by id ascending, and sorts elements that have the same id by date descending. Such a call is equivalent to sort!"a.id != b.id ? a.id < b.id : a.date > b.date"(r), but multiSort is faster because it does fewer comparisons (in addition to being more convenient).


						
				template multiSort(less...)
				;

Contained Functions

Name	Description
multiSort

Returns

The initial range wrapped as a SortedRange with its predicates converted to an equivalent single predicate.

Example

import std.algorithm.mutation : SwapStrategy;
static struct Point { int x, y; }
auto pts1 = [ Point(0, 0), Point(5, 5), Point(0, 1), Point(0, 2) ];
auto pts2 = [ Point(0, 0), Point(0, 1), Point(0, 2), Point(5, 5) ];
multiSort!("a.x < b.x", "a.y < b.y", SwapStrategy.unstable)(pts1);
writeln(pts1); // pts2

Authors

Andrei Alexandrescu

License

Boost License 1.0.