[Issue 1449] deprecated methods are counted as interface implementation

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1449



--- Comment #12 from yebblies <yebblies at gmail.com> 2011-06-16 07:22:09 PDT ---
(In reply to comment #10)
> 
> It does so implicitly.
> 
> If you have
> 
> Bar b = new Foo;
> 
> and do 
> 
> b.foo();
> 
> the compiler will not be able to catch it, as it cannot know whether an
> arbitrary Bar instance actually is an instance of Foo. So at runtime, a
> deprecated function will be called, or attempted to be called.
> 
> The spec probably does not cover this particular usecase, but it seems to me
> that it is worth a warning. It just doesn't make sense to have an
> implementation be deprecated, when the same function in the interface is not.

I agree.  I think it should be an error to override a non-deprecated function
with a deprecated one.  It should probably be an error to override a deprecated
function with a non-deprecated one too.

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