Setting to empty string.

[micro-heart-of-gold.mit.edu!news.bbn.com!usc!hacgate!ddemo3!hayes@bloom-b]

Yes, I'm a beginner.

I want to be able to set a string variable to the empty string.
I was under the impression that Ada could do this in a single
assignment like
   str := "";
But, from my test cases, I see that this won't work due to
CONSTRAINT_ERROR.  Am I attempting the impossible? Must I use
a string copy procedure??? 

my test example:
   procedure test is
      str: string (1..100);
   begin
      str := "";
   end test;



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*** Brian Hayes hayes@hac2arpa (310) 616-5129 ***