Re: how to reverse find_if?

From:
red floyd <no.spam@here.dude>
Newsgroups:
comp.lang.c++
Date:
Fri, 16 Mar 2007 13:27:11 -0700
Message-ID:
<16DKh.859$rj1.697@newssvr23.news.prodigy.net>
JDT wrote:

red floyd wrote:

I think that you can use std::reverse_iterator with a pointer. See 24.1.1

typedef std::reverse_iterator<float *> rfloat_iter;
rfloat_iter p =
   std::find_if(rfloat_iter(m+6), rfloat_iter(m),
                std::bind2nd(greater_equal<float>(), 14.5));


Thanks for your help. First of all, what do you mean by 24.1.1?


Section 24.1.1 of the ISO C++ Standard (ISO/IEC 14882:2003).

I am testing your code. To check if find_if finds something, should I
use "p == rfloat_iter(m+6)" or "p == rfloat_iter(m)"?

The latter.

Besides, is the range between m+5 and m-1?


Sort of. See 24.1.1 for more details.

Your code has some compile errors. I appreciate if somebody can show me
what's the correct syntax (because I am not familiar with this regard).


I'm not surprised, I wrote it off the top of my head. I'm sure that one
of the other more knowledgeable types here can help you more than me.

Also, as a matter of etiquette, please try not to top-post (posting all
your text above what you're replying to) -- it's frowned on in this
newsgroup. Instead, intersperse your replies with the text you're
referring to (as I did here), or after the text.

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