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  Stupid generics tricks  (Read 4860 times)
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Offline Wiki Duke

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« Posted 2014-01-14 15:50:40 »

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Phantom Types

TODO:  Add cheesey type refinement (sketched in the phantom types thread as well)

Checked exceptions as unchecked
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 public final class Util {
   
   /** Class for type erasure magic */
   private static class SilentThrow<T extends Throwable>
   {
     @SuppressWarnings("unchecked")
     private void rethrow(Throwable t) throws T { throw (T)t; }
   }
 
   private static final SilentThrow<RuntimeException> silentThrow = new SilentThrow<>();
   
   /** Throws a checked exception 't' as unchecked. */
   public static void silentThrow(Throwable t)
   {
     silentThrow.rethrow(t);
   }
 }


Constuctor hugger
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public class Animal<T>
{
   public <P> Animal(P mommy, P daddy) {
      ...
   }
}

dog = new <Wolf>Animal<Dog>(wooo, woooo);
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