Re: [Boost-users] Boost.lambda: how to sort this vectorwithfunction?

Subject: Re: [Boost-users] Boost.lambda: how to sort this vectorwithfunction?
From: Roland Bock (rbock_at_[hidden])
Date: 2009-02-09 03:21:03

Hi Joost,

well, I am afraid I cannot help you in rectifying the lambda (tried that 
  with the code I wrote). My suggestions would be

a) use the currently active code or
b) boil down the problem to a complete example of some 30 lines and ask 
again. I am sure someone will know, but it should be easy to experiment 
with.

Sorry that I cannot solve the original problem :-(

Regards,

Roland

Joost Kraaijeveld wrote:
> Hi Roland,
> 
>> I am sure there is some way to extend the code you wrote in such a way 
>> that it compiles and works as it should. My question would be: Are you 
>> going to still understand it in, say, half a year? Four binds in one 
>> expression is certainly not unheard of, but personally I would do it 
>> with one bind and an old-fashioned function, see attached code.
> 
> Part of the code is just investigating that: am I (and others) able to
> understand what I wrote. I also implemented something you suggested, to
> compare it with the lambda expression.
> 
>> Hope I got your settings right. I was a bit confused by otherSide being 
>> a function of edge. This would mean that start is an Edge, while finish 
>> is a Vertex in the sort-code. But start and finish are both Vertexes in 
>> the CostEstimate function...
>>
>> To avoid such wondering, it would help if you could provide a small but 
>> complete program which shows the problem. Nothing more and nothing less.
> 
> 
> http://trac.askesis.nl/svn/tidbits/AIAStar/Main.cpp
> 
> change the comments from lines 457 and further to get the error
> 
> TIA
>