[ruby-core:44485] [ruby-trunk - Feature #6315] handler to trace output of each line of code executed

Issue #6315 has been updated by ankopainting (Anko Painting).



>  Thank you.  I understand what you want.  However, I think it needs
>  performance drawback.  I'm not sure it is valuable feature or not
>  against slow down.
>  
>  -- 
>  // SASADA Koichi at atdot dot net

I understand your concern.  I think power > speed.  In ruby this feature is impossible currently.

please watch http://vimeo.com/40281991.  It is 5 minutes but shows the power of such features.

I think it would be okay if it was kept separate to set_trace_func so current applications would not be affected.

thank you for taking the time to listen to my idea.
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Feature #6315: handler to trace output of each line of code executed
https://bugs.ruby-lang.org/issues/6315#change-26041

Author: ankopainting (Anko Painting)
Status: Feedback
Priority: Normal
Assignee: 
Category: 
Target version: 


using a similar mechanism to set_trace_func, I would like a way to get the line number and return value of each line.  This would allow me to create a live debugger, much like light table from chris granger and/or bret victor's javascript demo.

It could be an extra return value of set_trace_func or we could use a new method.


-- 
http://bugs.ruby-lang.org/