[Jprogramming] try. catch. catchd. question

[Brian Schott]

	No, I see your point. And a slightly changed
example.

   f=: 4 : 0
  try.
   try. 3+y catch. *:x catchd. %:x end.
  catch.
   'x and y are both bad'
  end.
)
   13 f 'a'
169
   13!:0[0
   13 f 'a'
169
   13!:0[1
   13 f 'a'
|domain error: f
|   3    +y
|f[:1]



On Sat, 10 Feb 2007, Brian Schott wrote:

+ Bill,
+
+ 	I do not read any precedence into the catch.es .
+ 	Rather as I read it, if the catchd. does not apply
+ because 13!:0]1 then the error will not be caught and
+ therefore it will trigger a system error message rather than
+ performing the alternative action.
+
+
+ On Sat, 10 Feb 2007, bill lam wrote:
+
+ + for the verb,
+ +
+ + f=: 4 : 0
+ +   try.
+ +    try. 3+y catchd. *:x catch. %:x end.
+ +   catch.
+ +    'x and y are both bad'
+ +   end.
+ + )
+ +
+ +     13 f 'a'
+ + 3.60555
+ +     13!:0[1
+ +     13 f 'a'
+ + |domain error: f
+ + |   3    +y
+ + |f[:1]
+ +
+ + If I read correctly, precedence is:  catch > catchd > catcht, so that the catch
+ + clause alone will trap all error no matter if there are catchd or catcht or
+ + debug flag.  Also, at most one catch/catchd/catcht clause will be invoked.  Am I
+ + missing thing?
+ +
+ + --
+ + regards,
+ + bill
+ + ----------------------------------------------------------------------
+ + For information about J forums see http://www.jsoftware.com/forums.htm
+ +
+
+ (B=) <----------my "sig"
+
+ Brian Schott
+ Atlanta, GA, USA
+ schott DOT bee are eye eh en AT gee em ae eye el DOT com
+ http://schott.selfip.net/~brian/
+

(B=) <----------my "sig"

Brian Schott
Atlanta, GA, USA
schott DOT bee are eye eh en AT gee em ae eye el DOT com
http://schott.selfip.net/~brian/