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Index › Programming Questions & Help › Syntax Questions › use ENUM inside processing
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use ENUM inside processing (Read 1962 times)
mcanet
use ENUM inside processing
Nov 24th, 2008, 7:59pm  
Hi,

I didn't find a way to declare without an error a ENUM insite processing. Like example:

enum Apple {  
 A, B, C, D, E
}

The error say: "Unexpected token Apple"

Anyone have some idea how to do it.
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PhiLho 
Re: use ENUM inside processing
Reply #1 - Nov 24th, 2008, 11:46pm  
Whilst Processing uses now Java 1.5 (or 1.6 now?), it still uses a Java 1.4 grammar inherited from Antlr for its pre-processing needs... If anybody known such grammar for 1.5/1.6 syntax, I am sure Processing authors will appreciate!

The consequence is, alas, we cannot use yet new syntax constructs, like ArrayList<String> (generics), @Override (annotation), for (String str : stringList) (foreach syntax), and some others like, here, enums...
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PhiLho 
Re: use ENUM inside processing
Reply #2 - Nov 27th, 2008, 3:05pm  
Um, I see a Java 1.5 .g file at Antlr site: http://www.antlr.org/grammar/list
So maybe my info is outdated... Smiley

And anyway, you can use 1.5 syntax in separate .java files, I think. Might be worth to try out.
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fry
Re: use ENUM inside processing
Reply #3 - Nov 27th, 2008, 11:19pm  
PhiLho  wrote on Nov 27th, 2008, 3:05pm:
Um, I see a Java 1.5 .g file at Antlr site: http://www.antlr.org/grammar/list
So maybe my info is outdated... Smiley

And anyway, you can use 1.5 syntax in separate .java files, I think. Might be worth to try out.

No, that's only a small fraction of the work that needs to be done (I'm aware of the 1.5 grammar). See the bug mentioned from the FAQ on this topic:
http://dev.processing.org/bugs/show_bug.cgi?id=598
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PhiLho 
Re: use ENUM inside processing
Reply #4 - Nov 28th, 2008, 12:35am  
Ah, I knew I saw that somewhere, I just mixed up ideas! Smiley
Alas, I never studied Antlr and I am not overly familiar with grammars, but maybe this thread will bring this bug in light and attract a knowledgeable person with some free time!
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