array of elements of various subclasses

Nov 07, 2010

Hello, Say I have some subclasses of Pattern. When I try to write Pattern[] patterns = [x,y,z]; I get an error because, apparently, D types the array according to the class of z (Choice is here the type of z): DeeMatch.d(473): Error: cannot implicitly convert expression (x) of type DeeMatch.Pattern to DeeMatch.Choice DeeMatch.d(473): Error: cannot implicitly convert expression (y) of type DeeMatch.Pattern to DeeMatch.Choice DeeMatch.d(473): Error: cannot implicitly convert expression ([(__error),(__error),z]) of type Choice[] to Pattern[] Is this interpretation correct? And what can I do? Denis -- -- -- -- -- -- -- vit esse estrany ☣ spir.wikidot.com

spir Wrote: > Hello, > > > Say I have some subclasses of Pattern. When I try to write > Pattern[] patterns = [x,y,z]; > I get an error because, apparently, D types the array according to the class of z (Choice is here the type of z): > > DeeMatch.d(473): Error: cannot implicitly convert expression (x) of type DeeMatch.Pattern to DeeMatch.Choice > DeeMatch.d(473): Error: cannot implicitly convert expression (y) of type DeeMatch.Pattern to DeeMatch.Choice > DeeMatch.d(473): Error: cannot implicitly convert expression ([(__error),(__error),z]) of type Choice[] to Pattern[] > > Is this interpretation correct? And what can I do? > > Denis > -- -- -- -- -- -- -- > vit esse estrany â˜£ > > spir.wikidot.com > Pattern[] patterns = [x,y,cast(Pattern)z];

November 07, 2010

Re: array of elements of various subclasses

Posted by Don
in reply to spir

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Don

Posted in reply to spir

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spir wrote:
> Hello,
> 
> 
> Say I have some subclasses of Pattern. When I try to write
> 	Pattern[] patterns = [x,y,z];
> I get an error because, apparently, D types the array according to the class of z (Choice is here the type of z):
> 
> DeeMatch.d(473): Error: cannot implicitly convert expression (x) of type DeeMatch.Pattern to DeeMatch.Choice
> DeeMatch.d(473): Error: cannot implicitly convert expression (y) of type DeeMatch.Pattern to DeeMatch.Choice
> DeeMatch.d(473): Error: cannot implicitly convert expression ([(__error),(__error),z]) of type Choice[] to Pattern[]
> 
> Is this interpretation correct? And what can I do?
> 
> Denis
> -- -- -- -- -- -- --
> vit esse estrany ☣
> 
> spir.wikidot.com

Yes, that's a known bug. It's on the to-do list.

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