Re: [ALACPP] where the boost meets the stl

["Jon Stewart" <stew1@xxxxxxxxxxx>]

> > Yeah, I went to sleep thinking the only hook would be "operator int",
> > but I thought that couldn't possibly be what you meant. ;-)


It's cool, though, because it comes with the realization that one can use 
type conversion to let an object know when it's being used as an rvalue 
and take appropriate action, thus enabling a form of lazy evaluation.


> FYI, there is an even more evil way to do it that I also thought about:
> 
> Create a wrapper iterator and dereferenced type that did all the
> evilness in operator()=(x). See, I can top your evil foo!

so... like this?

fill_n(MakeEvilIterator(back_inserter(vec)), 20, var(i)++);

// EvilIterator overloads operator()=(x) to take the lambda function
// and assign the result of a call to the back_inserter.

One issue, I'm not sure it's a problem, is that you sort of have the evil 
iterator and the lambda function meeting in the middle, so to speak. For 
lack of vocabulary, they "converge".

(If Flannery O'Connor had been a l33t C++ h8x0r, she'd write code like 
this.)



Jon
-- 
Jon Stewart                                 Advanced Los Angeles C++
stew1@xxxxxxxxxxx                           http://www.alacpp.org
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