Re: Reworking import statements (proposal)

On 04/13/2016 01:02 PM, Piotr Tarsa wrote:
> Hi,
>
> As of now relative imports (ie importing from something already 
> imported) look exactly the same as absolute ones (ie where we're 
> importing using full paths), except when explicitly starting from 
> _root_. That is both confusing (where I have relative or absolute 
> import? it's not immediately obvious) and ugly (the _root_ prefix is 
> ugly).
>
> My proposal is to change import statements semantics to make things 
> obvious:
I don't see where relative imports are confusing. Can you give an 
example? Most people nowadays let package level imports manage by the 
IDE. Imports in a smaller scope are mostly used as relative imports and 
they are written manually. Prefixing them with something results in more 
typing - therefore hardly an improvement.
>
> Current state:
> import _root_.outer.inner.Member - for absolute imports (usually used 
> when there are name clashes)
> import outer.inner.Member - for absolute imports (usually used when 
> there are no name clashes)
> import inner.Member - for relative imports
> import parameter.member - for importing from parameters
>
> Proposal for next Scala version:
> import _root_.outer.inner.Member - deprecate _root_ prefix
> import outer.inner.Member - leave as it is
> import inner.Member - deprecate this form of relative imports
> import _.inner.Member - introduce this syntax for relative imports
> import parameter.member - leave as it is
>
> And a version after that:
> import _root_.outer.inner.Member - drop support for _root_prefix
> import outer.inner.Member - keep it
> import inner.Member - drop support for this form of relative imports
> import _.inner.Member - keep it
> import parameter.member - keep it
>
> What do you think about it?
>
> Regards,
> Piotr Tarsa
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