Re: [boost] [Polygon] What does this error mean?

Subject: Re: [boost] [Polygon] What does this error mean?
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-09-03 09:15:18

Phil Endecott wrote:
> Simonson, Lucanus J wrot:
> > The error the above should fix is:
> >
> > /usr/local/src/gtl/boost/polygon/rectangle_concept.hpp:192:
> error: no
> > matching function for call to
> > 'set(boost::polygon::rectangle_data<int>&,
> > boost::polygon::orientation_2d_enum, std::pair<int, int>)'
> >
> > Is that error still present?
>
> Ha, actually I hadn't noticed that particular error amongst the
> kilobytes of other spewage.  It has now gone.  What I am
> still getting
> is the "class std::set is not a function" stuff.
>
> I've also added the interval_mutable_traits specialisation
> that Thomas
> suggested without any improvement.
>
> I would be interested to hear if anyone thinks that concept checking
> could make these particular errors any more readable.

Concept checking would help immensely -- and was what I thought of immediately upon seeing Lucanus' reply to your initial query -- because it would have indicated that std::pair<int,int> was not an interval type.  The documentation would then be able to direct you to the traits specializations needed to satisfy the failed concept.  That is so much more helpful than obscure diagnostics from deep within the library.

_____
Rob Stewart                           robert.stewart_at_[hidden]
Software Engineer, Core Software      using std::disclaimer;
Susquehanna International Group, LLP  http://www.sig.com

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