[m-dev.] for review: new module for handling file offsets

[Fergus Henderson]

On 08-Mar-1999, Zoltan Somogyi <zs at cs.mu.OZ.AU> wrote:
> 
> For review by anyone. The long-term intention is to replace the line numbers
> in term__contexts with file offsets, which are the same size but carry more
> information. This extra information can be useful to the debugger, as well
> as for better error messages.
> 
> library/file_offset.m:
> 	A new module to handle conversions from offsets into files into
> 	line number, column number pairs.

That module looks fine, but I don't think it is of sufficiently general
usefulness to warrant inclusion in the standard library.

> library/std_util.m:
> 	Add two new types:
> 
> 	:- type maybe_error ---> ok ; error(string).
> 	:- type maybe_error(T) ---> ok(T) ; error(string).

Fine.

-- 
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WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
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