[plt-dev] coding ideas from JaneStreet

This functionality is available for all today in the PLAI language.
The documentation is at:

http://docs.plt-scheme.org/plai/plai-scheme.html

You can get it anywhere with

(require plai/datatype)

Jay

On Tue, Apr 13, 2010 at 2:42 AM, Paulo J. Matos <pocmatos at gmail.com> wrote:
> Eli Barzilay <eli at barzilay.org> writes:
>
>>>
>>> The code that I'm talking about is a dialect of typed scheme that has
>>> ML-like type definitions and matching, with the same kind of errors
>>> when matches don't cover all cases, and when there are patterns that
>>> are not reachable.  It's working only for these type definitions (not
>>> on the usual scheme types, not on unions, etc -- only on types that
>>> were defined using the ML-ish form).  But for the class it provides
>>> the same advantage that ML has -- if you extend the AST definition
>>> with a new variant, the compiler will tell you where you're missing
>>> cases to deal with it.
>>
>> (Oh, and while this is a dialect of TS, the code predates it, and did
>> the same with plain scheme structs previously.)
>
> Awesome, this one of my favourite features missing in Scheme. Hopefully
> we will see this soon in TS, Sam?
>
> --
> PMatos
>
>
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-- 
Jay McCarthy <jay at cs.byu.edu>
Assistant Professor / Brigham Young University
http://teammccarthy.org/jay

"The glory of God is Intelligence" - D&C 93