Re: [boost] [range] adaptors and member functions pointers

Subject: Re: [boost] [range] adaptors and member functions pointers
From: Jeffrey Lee Hellrung, Jr. (jeffrey.hellrung_at_[hidden])
Date: 2011-10-12 10:23:21

2011/10/12 Yanchenko Maxim <maximyanchenko_at_[hidden]>

> Hi,
>
> While transforming and filtering sequences, it's pretty common to call the
> elements' member functions, so I think it's worth adding some syntactic
> sugar for range adaptors in order to achieve cleaner syntax.
>
> E.g. if we have a class
>
> struct Foo {
>   std::string description() const;
> };
>
> and we want to get all non-empty descriptions, we could just write this
> clean code:
>
>   foo_list | transformed(&Foo::description) | filtered(&std::string::size)
>
> To enable this syntax, the attached patch should be applied to
> boost/range/adaptor/argument_fwd.hpp (diff against 1.47.0).
>
> Is there any interest to add this to Boost.Range?
>

It doesn't seem all that onerous to insert a boost::mem_fn [1] in there
(i.e., "transformed(boost::mem_fn(&Foo:::description))")...or does this not
work?

- Jeff

[1] http://www.boost.org/doc/libs/1_47_0/libs/bind/mem_fn.html