Re: [Boost-users] Wrong visitor type when using depth_first_search with start location

From: Jean-Olivier Racine (joracine_at_[hidden])
Date: 2008-05-07 09:49:26

Hi again,

 

No problem for the misreading, happens to the best of us ;)

 

I’m not sure it has anything to do with the property maps. Looking at the
code and documentation for dfs(), it seems to be related more to the named
arguments system. I am not familiar with that system and although it seems
to be a very clever system, it makes the process of checking what the
function is expecting less obvious.

 

Thanks for your help and let’s hope someone has the answer ;p

 

Jean-Olivier Racine

HYPERLINK "mailto:joracine_at_[hidden]"joracine_at_[hidden]

HumanCAD development team

Nexgen Ergonomics Inc.

HYPERLINK "http://www.nexgenergo.com/"http://www.nexgenergo.com/

 

From: boost-users-bounces_at_[hidden]
[mailto:boost-users-bounces_at_[hidden]] On Behalf Of James Sutherland
Sent: Tuesday, May 06, 2008 2:36 PM
To: boost-users_at_[hidden]
Subject: Re: [Boost-users] Wrong visitor type when using depth_first_search
with start location

 

Hello James,

 

Thanks for your quick answer. I struggled for several hours to find the
answer you gave me within minutes and would have loved to get the answer
this quickly, but I already fixed that problem. ):

 

If you notice the error is regarding the visitor, not the ColorMap. It is
looking for the initialize_vertex and start_vertex method within the
visitor. Yet, I use the same visitor for a depth_first_search without the
3rd and 4th parameters and I don’t get an error…

 

I get the error even if I declare those methods within my BFSTreeVisitor, (I
suppose because of the visitor() cast).

 

So here’s my question: do I need to use another visitor cast? If so, which
one and why?

 

Sorry - I didn't carefully read your initial message.  

 

While this may be the blind leading the blind, I suspect that the problem is
not with your visitor, but with the property map you are using (or the way
you are using it).  That is what is giving rise to the "bgl_named_params"
portion of the error message you sent.

 

Unfortunately, I don't think that I can be of much help beyond that...  I
don't even see any examples provided of how to do what you are trying to do
when you get the errors...

 

James

 

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