[Nice-commit] Nice/src/bossa/link Dispatch.java,1.48,1.49

[<bo...@us...>]

Update of /cvsroot/nice/Nice/src/bossa/link
In directory sc8-pr-cvs1:/tmp/cvs-serv7825/src/bossa/link

Modified Files:
	Dispatch.java 
Log Message:
Dispatch on boolean values: @true and @false (by Arjan).


Index: Dispatch.java
===================================================================
RCS file: /cvsroot/nice/Nice/src/bossa/link/Dispatch.java,v
retrieving revision 1.48
retrieving revision 1.49
diff -C2 -d -r1.48 -r1.49
*** Dispatch.java	10 Dec 2002 18:46:33 -0000	1.48
--- Dispatch.java	18 Feb 2003 14:21:20 -0000	1.49
***************
*** 186,194 ****
  	if(sortedAlternatives.size()==0)
  	  User.error
! 	    (method, "Method " + method + " is declared but never defined:\n" +
  	     "no alternative matches " + toString(tags));
  	else
  	  User.warning(method,
! 		       "Method " + method + " is not exhaustive:\n" + 
  		       "no alternative matches " + 
  		       toString(tags));
--- 186,194 ----
  	if(sortedAlternatives.size()==0)
  	  User.error
! 	    (method, "Method " + method + " is declared but never implemented:\n" +
  	     "no alternative matches " + toString(tags));
  	else
  	  User.warning(method,
! 		       "Method " + method + " is not completely covered:\n" + 
  		       "no alternative matches " + 
  		       toString(tags));
***************
*** 259,263 ****
  
      List res = mlsub.typing.Enumeration.enumerate(cst, types, used);
!     return mergeNullCases(res, domains.length);
    }
  
--- 259,264 ----
  
      List res = mlsub.typing.Enumeration.enumerate(cst, types, used);
!     res = mergeNullCases(res, domains.length);
!     return enumerateBooleans(res, domains.length);
    }
  
***************
*** 305,308 ****
--- 306,339 ----
  
      return res;
+   }
+ 
+   /** Expand the 'boolean' case into 'true' and 'false'.
+    */
+   private static List enumerateBooleans(List tags, int length)
+   {
+     if (tags.size() < 1) return tags;
+ 
+     List res;
+     for (int pos = 0; pos < length; pos++)
+     {
+       res = new ArrayList();  
+       for (Iterator i = tags.iterator(); i.hasNext(); ) 
+       {
+         TypeConstructor[] tc = (TypeConstructor[]) i.next();
+         if (tc[pos] == PrimitiveType.boolTC)
+           {
+ 	    // Create two copies of this case, one for true and one for false.
+             TypeConstructor[] tc2 = new TypeConstructor[tc.length];
+             System.arraycopy(tc, 0, tc2, 0, tc.length);
+ 	    tc[pos] = PrimitiveType.trueBoolTC;
+             res.add(tc);
+             tc2[pos] = PrimitiveType.falseBoolTC;
+             res.add(tc2);
+           }
+ 	else res.add(tc);
+       }
+       tags = res;
+     }
+     return tags;	
    }
  }