Re: [gobo-eiffel-develop] cluster structure of bridge pattern

[Eric B. <er...@go...>]

Alexander Kogtenkov wrote:
>  
> I would also move PLATFORM/COMPILER-dependent
> directories down the hierarchy:
> 
>  foo/impl/foo/win32
>  foo/impl/foo/unix
>  foo/impl/foobar/win32
>  foo/impl/foobar/unix
> 
> and hide the platform dependencies in the descriptions
> of the clusters  foo/impl/foo and  foo/impl/foobar so that
> the client should not worry about implementation issues
> at all. The user just mounts
> 
>  foo/impl
> 
> or more selectively
> 
>  foo/impl/foo

It's not that easy because in the case of the xml library
for example, two (or more) different implementations for
the XML parser may be compiled into the program. So the
user needs to choose which implementations of the parser
he wants to have in his program. In that case having a
single point of entry for each implementation in the
impl directory seems better in my opinion:

  xml/impl/expat
  xml/impl/eiffel

-- 
Eric Bezault
mailto:er...@go...
http://www.gobosoft.com