Re: [boost] looping construct

From: John Torjo (john.lists_at_[hidden])
Date: 2004-04-21 03:51:50

John Torjo wrote:

> michael toksvig wrote:
>
>> A while back, Erik Niebler was testing the waters for inclusion of 
>> his very,
>> very clever looping construct into boost, but nothing really came of it.
>>
>> Erik's technique is described here:
>>    http://www.nwcpp.org/Meetings/2004/01.html
>>
>> Yup, macros are involved and they are yucky, and yup, there already 
>> exists a
>> for_each in the standard that works just fine if you care to move 
>> your loop
>> body away into a function, and yup, the name BOOST_FOREACH could use a
>> little love.
>>
>> But there is no denying the notational clarity and succinctness of e.g.:
>>    foreach(double &d, container)
>>        d += 2;
>>
>>  
>>
> You can also use the rtl (Ranges Template Library):
> (note: I'll rename the library, wince there's another one with the 
> same name ;))
>
> for( crange<container> r(cont); r; ++r)
>    *r += 2;
>
p.s. no macros involved in the above statement ;)
Best,
John