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Message from discussion Inferring Recursive Types
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Christopher Diggins  
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 More options Dec 21 2006, 7:59 pm
Newsgroups: comp.lang.functional
From: "Christopher Diggins" <cdigg...@gmail.com>
Date: 21 Dec 2006 16:59:18 -0800
Local: Thurs, Dec 21 2006 7:59 pm
Subject: Inferring Recursive Types
In Combinator theory the combinator SII (a.k.a. M or Mockingbird)
applies a function to itself.

\a.aa

I notice that SML 98 and F# can't infer the type (e.g. let M a = a a ).
What languages can infer the type? What language features are required
to express the type?

Why don't the type systems to those languages simply output something
like:

M : 'a.('a -> 'b) -> 'b

Thanks in advance,
Christopher Diggins
http://www.cdiggins.com


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