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Type abstraction and (polymorphic) equality
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Date: 2005-06-29 (18:06)
From: sejourne_kevin <sejourne_kevin@y...>
Subject: Re: [Caml-list] Type abstraction and (polymorphic) equality
Christophe TROESTLER a écrit :
>   - One introduces the same capability of providing a special equality
>     (comparison) for certain types but, during compilation, "expand"
>     functions till the type for "=" is given by known functions
>     (something like a "generic" equality).  I guess however that that
>     may cause problems with separate compilation...

A generic equality should be one that work with recursives. A such
equality is slower than the Pervasives.(=) one. So (=) is just an
optimisation of a generic one that don't have been fully implemented.
When the compiler generate code he have the complete type, no ? so he
can know if a type is recursives or not, so he can select the slow but
recursives compliant version are the actual.
Maybe that it is more complex than this, no?


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