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Subject: Re: [boost] Interest check: memoization
From: James Porter (porterj_at_[hidden])
Date: 2009-01-25 20:31:41

Mathias Gaunard wrote:
> Why not simply
> auto g = memoize(f); /* type of g is unspecified, using auto for
> automatic type deduction */

That's the plan, but I was writing for gcc 4.3, and auto is only
available in gcc 4.4. :)

> Does your memoize adaptor require knowing the signatures of the function
> object?

It can only memoize one function (or method) at a time, since it stores
tuples of the arguments used to call the function, and assumes that the
tuples are all of the same type. It's simple for function pointers,
since they only have one type list for arguments, and simple for
Boost/TR1 function objects for the same reason, but arbitrary function
objects can have many overloads of operator(), and there would need to
be a way to specify which overload is associated with the memoizer.

- Jim

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