Re: [boost] painless currying

Subject: Re: [boost] painless currying
From: Gottlob Frege (gottlobfrege_at_[hidden])
Date: 2011-08-25 00:43:10

On Tue, Aug 23, 2011 at 3:38 PM, Eric Niebler <eric_at_[hidden]> wrote:
> After playing around with functional languages, I've come to envy how
> easy they make it to curry functions. Call a 2-argument function with 1
> argument and you get a function that takes 1 argument. Pass another
> argument and it evaluates the function. Simple. In contrast, C++ users
> have to use binders, which are not as nice.
>
> On a lark, I implemented a wrapper that turns any TR1-style function
> object into a "curryable" function object (attached). Successive
> function call invocations bind arguments until enough arguments are
> bound to invoke the wrapped function. With it you can do the following:
>
>    curryable<std::plus<int> > p;
>    auto curried = p(1);
>    int i = curried(2);
>    assert(i == 3);
>
> Is there any interest in such a thing?
>

Possibly.  I also wish templates worked more like this (partial specialization).

I think we all need to learn more functional programming before
embarking on C++1x.

Tony