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S-expressions and pattern matching

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Dmitry Boulytchev 2018-05-04 02:59:23 +03:00 • committed by danyaberezun
parent 958bf482a8
commit 800d976b8e
8 changed files with 148 additions and 88 deletions
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31
regression/test039.expr Normal file
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@ -0,0 +1,31 @@
fun insert (t, x) {
case t of
`leaf -> return `node (x, `leaf, `leaf)
| `node (y, l, r) -> if x > y
then return `node (y, insert (l, x), r)
else return `node (y, l, insert (r, x))
fi
esac
}
fun find (t, x) {
case t of
`leaf -> return 0
| `node (y, l, r) -> if x == y then return 1
elif x > y then return find (l, x)
else return find (r, x)
fi
esac
}
n := read ();
t := insert (insert (insert (insert (`leaf, 5), 4), 6), 3);
write (find (t, 5));
write (find (t, 4));
write (find (t, 6));
write (find (t, 3));
write (find (t, 2));
write (find (t, 1))