[Jprogramming] try. catch. catchd. question

[Brian Schott]

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
+ ----------------------------------------------------------------------
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+

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Brian Schott
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