🚀 go-pugleaf

   Date: 18 Nov 89 21:22 -0800
   From: Mike Bolotski <mikeb@ee.ubc.ca>

   I'm not sure if this is a g++ bug or a V2.0 feature. In any case,
   similar code worked fine under 1.35.   The compiler complains about
   the jump past the initialization point.  In this example, the goto
   can be replaced by a continue; in the actual application, the goto 
   is used as a continue(3) equivalent (continue with loop 3 levels out),
   so no flames about goto's. Please.

   -----

   coho{mikeb}101: g++ -v lambda.cc
   [...]
   lambda.cc: In function int main ():
   lambda.cc:14: invalid jump to label `nextp'
   lambda.cc:11: crosses initialization of `q'
   coho{mikeb}102: cat lambda.cc

   #include <stdio.h>

   int main()
   {

      for (int p = 100; p ; ) {            
	 if (p > 10)
	      goto nextp; 

	  short q = 7 * p; 
	  if (q > 4)
	     printf("Hello\n");
   nextp: ;
      }
   }
   coho{mikeb}103: exit
   exit


It's a 2.0 feature.  cfront 2.0 also gives an error:

cfront < l5.cc > /dev/null
"", line 9: error: goto nextp past initialized q
teacake% 

Both compilers will let you use continue.  If you want a work-around,
just wrap `q' in a scope which makes it invisible at `nextp'.

Michael