Re: [boost] The perfect tutorial example?

From: David Abrahams (dave_at_[hidden])
Date: 2005-07-09 22:38:55

Douglas Gregor <doug.gregor_at_[hidden]> writes:

> On Jul 8, 2005, at 1:51 AM, David Abrahams wrote:
>
>>
>> I'm trying to come up with an example function to use in the tutorial
>> for the parameters library.  The function would ideally:
>>
>> * have four or fewer parameters, most of which have defaults.
>>
>> * have at least one defaulted parameter whose type would normally be a
>>   deduced function template parameter (when the argument is passed
>>   explicitly)
>>
>> * have a parameter whose default depends on the value of another
>>   parameter
>>
>> * have at least one parameter whose default value is of nontrivial
>>   complexity to compute (so I can demonstrate lazy defaults).
>>
>> * be realistic
>>
>> Any ideas would be most welcome.
>
> depth_first_search(graph, visitor, color_map, index_map)
>
> visitor has a simple default (dfs_visitor<>())
>
> index_map has a nontrivial default of get(vertex_index, graph)
>
> color_map has a nontrivial default of:
>    vector_property_map<color_type, typeof(index_map)>
>

Say, that doesn't correspond to what I see at
http://www.boost-consulting.com/boost/libs/graph/doc/depth_first_search.html
and furthermore I think that last "nontrivial default" is a type, not
a value.  Can you clear this up?  Did you mean a different algorithm?

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com