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Newbie question: OCaml equivalent of Haskell's show?
-
Antony Courtney
- Richard Jones
- Jon Harrop
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Date: | 2008-07-06 (19:02) |
From: | Richard Jones <rich@a...> |
Subject: | Re: [Caml-list] Newbie question: OCaml equivalent of Haskell's show? |
On Sun, Jul 06, 2008 at 11:33:35AM -0400, Antony Courtney wrote: > I'm an experienced Haskell hacker trying OCaml for the first time. > > One thing I am desperately searching for but have been unable to find > is some direct runtime access to the string representation of > arbitrary OCaml values. Note that OCaml doesn't carry very much information at runtime about what is represented in a value. However there are various generic printers around. Probably your best bet for a quick and dirty hack is to use the 'Std.dump' function in extlib (http://code.google.com/p/ocaml-extlib/). This can turn anything into a string, and tries to produce something which looks similar to an OCaml toplevel value. Documentation for Std.dump: http://ocaml-extlib.googlecode.com/svn/doc/apiref/Std.html If you want to go further than this and have OCaml write a pretty- printer for your types, then you'll want to look at one of the following projects (and probably others ...) http://www.ocaml.info/home/ocaml_sources.html http://code.google.com/p/deriving/ http://tools.assembla.com/tywith/wiki Another alternative is to run your code in the OCaml toplevel. Rich. -- Richard Jones Red Hat