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| author | Shinya Sato <shinnya.sato@gmail.com> | 2024-03-05 18:19:27 +0900 |
|---|---|---|
| committer | Shinya Sato <shinnya.sato@gmail.com> | 2024-03-05 18:19:27 +0900 |
| commit | 49960d8950d001a372a0abde670a66ee60026957 (patch) | |
| tree | adad1d5fe428bf0bea151f71ed114223fc246bca /sample/sort/msort.in | |
| parent | 0cf73da9ad035089c66d21021a656e4606796c47 (diff) | |
| download | inpla-49960d8950d001a372a0abde670a66ee60026957.tar.gz inpla-49960d8950d001a372a0abde670a66ee60026957.zip | |
v0.12.0
Diffstat (limited to 'sample/sort/msort.in')
| -rw-r--r-- | sample/sort/msort.in | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sample/sort/msort.in b/sample/sort/msort.in new file mode 100644 index 0000000..599990b --- /dev/null +++ b/sample/sort/msort.in @@ -0,0 +1,28 @@ +// Merge sort + +// Rules +msort(ret) >< [] => ret~[]; +msort(ret) >< x:xs => ms_tail(ret, x)~xs; + +ms_tail(ret, n) >< [] => ret~[n]; +ms_tail(ret, n) >< x:xs => + split(left,right) ~ (n:x:xs), + msort(a)~left, msort(b)~right, merge(ret,b)~a; + +merge(ret, snd) >< [] => ret~snd; +merge(ret, snd) >< x:xs => mergeCC(ret, x, xs)~snd; + +mergeCC(ret, int y, ys) >< [] => ret~(y:ys); +mergeCC(ret, int y, ys) >< (int x):xs +| x <= y => ret~(x:cnt), mergeCC(cnt, y, ys) ~ xs +| _ => ret~(y:cnt), mergeCC(cnt, x, xs) ~ ys; + + +split(right,left) >< [] => right~[], left~[]; +split(right,left) >< x:xs => + right~(x:cntl), left~cntr, split(cntr,cntl)~xs; + + +// Nets +msort(ret)~[3,6,1,9,2]; +ret;
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