On Aug 26, 2015, at 6:06 AM, Rémi Forax <fo...@univ-mlv.fr> wrote: > > it's less powerful but it seems you can encode all your examples of loops too.
No, I don't think so. Multiple pred/fini pairs implement multiple loop exits. Any loop with an "if-return" in it has an exit distinct from the loop's main test. And each exit requires a different fini function, to encode a special result. The match loop has this multi-exit character: for (int i; i < a.len; i++) { Object e = a[i]; if (ok(e)) return e; // first fini function; could also be e.payload } return null; // second fini function; could also be throwNotFound or Optional.none Sometimes even "&&" type predicate logic expands into multi-exit code, if the loop needs to return a value that encodes which sub-predicate caused the exit. — John
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