[m-dev.] Even more minimal diff

[Fergus Henderson]

On 03-Oct-2002, Michael Day <mikeday at yeslogic.com> wrote:
> 
> Adding a function to io.m to construct io__error code from error messages,
> which is useful for stream implementations and any other module that
> wishes to return io__result and can fail for reasons of its own making.

That looks fine.
Please feel free to go ahead and commit it.

(This one is simple enough and useful enough that I think it is OK
to go in despite the feature freeze.)

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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