|Subject:||Re: Gets vertical skylines from grob stencils (issue 5626052)|
|Date:||Fri, 17 Feb 2012 00:14:33 -0800|
On Feb 16, 2012, at 9:31 PM, Joe Neeman wrote:
On Thu, Feb 16, 2012 at 3:14 AM, address@hidden <address@hidden> wrote:
On Feb 16, 2012, at 11:40 AM, address@hidden wrote:
> The buildings are in increasing order, so this should work:
> Real last_end = -infinity_f;
> for (...)
> if (i->y_intercept_ > -infinity_f)
> return last_end;
> last_end = i->end_;
> return infinity_f;
I know this is a lame question, but how would one write the reverse iterator. I tried using reverse_iterator and g++ barfs, and I can't use the same syntax one would use in a for loop w/ a vector.That's a bit hard to say without knowing what you tried... did you use rbegin() and rend()?Yup - I more or less copied the example from cplusplus.com. As an experiment, try writing a reverse iterator in that file to the tune of:for (list<Building>::reverse_iterator i = buildings_.rbegin (); i != buildings_.rend (); ++i)Anywhere in a function. You should see a compiler error.
I fixed it, though, by reversing a copy of the list and iterating forward through it.
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