Re: [Boost-users] [BGL] - deriving from filtered_graph

Subject: Re: [Boost-users] [BGL] - deriving from filtered_graph
From: Andrew Sutton (andrew.n.sutton_at_[hidden])
Date: 2009-01-28 12:49:19

> But doesn't that mean the Concepts for property access should reflect
> what is actually required by a type?  Or should the implementation
> detail not be leaked in the first place?
>

The implementation probably shouldn't be leaked, but one could argue that no
implementation details are being leaked in this case. If filtered graph
adaptor defines the interface/implementation boundary, then clients of the
adaptor would never have to see those typedefs. Since you're deriving from
the adaptor, you're not the same kind of client. You're extending the
library by creating a *new* adaptor and hence, have to deal with the
implementation :)

Either way, it might be possible to move that logic into a metafunction that
can be inherited by any adaptor and make extension a little easier.

Andrew Sutton
andrew.n.sutton_at_[hidden]