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Polymorphic variant to string?
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Date: 2005-11-17 (13:24)
From: Richard Jones <rich@a...>
Subject: Re: [Caml-list] Polymorphic variant to string?
On Wed, Nov 16, 2005 at 06:44:34PM +0000, Chris Campbell wrote:
> Is there a general method for converting polymorphic variants to
> strings?  The method using camlp4 assumes the source is compiled with
> it, which is not the case.  Basically I want to print a list of
> variants if a unit tests fail, so we can see exactly the contents of
> the list at that point.

You might want to try Std.dump in extlib.  It only prints out the
hash, but you can precalculate those given a list of variant names.

rich@oirase:/tmp$ cat test.ml
print_endline (Std.dump [ `Foo; `Bar; `Baz 123.0 ])
rich@oirase:/tmp$ ocamlfind ocamlc -package extlib test.ml -linkpkg -o test
rich@oirase:/tmp$ ./test
[3505894; 3303859; (3303867, 123.)]


Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
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