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Re: import/export asymmetry



>Or is there a rational for the current, asymmetrical design?
>  
>
Practical considerations trumping theoretical ones, I would think.

When one imports a library it is easiest to simply have all of its 
exported symbols available.

When one defines an export set for a library, it is overwhemlingly the 
case that there will be many private implementation-specific symbols 
that are not intended for export.

Import/export are assymetrical because they do different things. In 
particular, exports are part of the "work" of a library, they are a form 
of declaration, and so should be clear.

On the other hand, providing an (export-all) for convenience might be 
useful, as long as the default is to be specific about what the export 
set is.

-- 
Cheers,
Ray Blaak
blaak@xxxxxxxxxxxx