Begin forwarded message:
From: "Schwab,Wilhelm K" <bschwab@anest.ufl.edu> Subject: FW: Meeting Aliens (callbacks) in the debugger - was this risky? Date: March 21, 2012 1:57:16 AM GMT+01:00 To: "stephane.ducasse@inria.fr" <stephane.ducasse@inria.fr>
Stef,
I am currently unable to post to the list (Outlook is being a pain) - could you forward this for me? I'm curious if I'm living dangerously or simply basking in Smalltalk's wonderful features.
Bill
From: Schwab,Wilhelm K Sent: Tuesday, March 20, 2012 8:55 PM To: pharo-project@lists.gforge.inria.fr Subject: Meeting Aliens (callbacks) in the debugger - was this risky?
To see whether one can expect to set breakpoints in callback blocks, I gave it shot in #exampleCqsort:
cb := Callback signature: 'int (*)(const void *, const void *)' block: [ :arg1 :arg2 | self halt. ((arg1 doubleAt: 1) - (arg2 doubleAt: 1)) sign ].
I then ran the example. To my pleasant surprise/amazement, a walkback appeared and the debugger was functional; I was able to evaluate the accessors and get numbers. Is this dangerous in some way, or does it "just work?" It would be hugely helpful if it is safe.
Bill