From 49960d8950d001a372a0abde670a66ee60026957 Mon Sep 17 00:00:00 2001 From: Shinya Sato Date: Tue, 5 Mar 2024 18:19:27 +0900 Subject: v0.12.0 --- sample/sort/qsort.in | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 sample/sort/qsort.in (limited to 'sample/sort/qsort.in') diff --git a/sample/sort/qsort.in b/sample/sort/qsort.in new file mode 100644 index 0000000..523d7d8 --- /dev/null +++ b/sample/sort/qsort.in @@ -0,0 +1,19 @@ +// Quick sort + +// Rules +qsort(ret) >< [] => ret~[]; +qsort(ret) >< (int x):xs => + Append(ret, x:right)~left, part(smaller, larger, x)~xs, + qsort(left)~smaller, qsort(right)~larger; + +// Note: `Append' is implemented as the following built-in agent: +// Append(ret, b)~a --> ret ~ (a++b) + +part(smaller, larger, int x) >< [] => smaller~[], larger~[]; +part(smaller, larger, int x) >< (int y):ys +| y smaller~(y:cnt), part(cnt, larger, x)~ys +| _ => larger~(y:cnt), part(smaller, cnt, x)~ys; + +// Nets +qsort(ret)~[3,6,1,9,2]; +ret; \ No newline at end of file -- cgit v1.2.3