Re: [Haskell-cafe] debugtracehelpers Re: traceM and traceShowM

2009-10-20 Thread Justin Bailey
These woudl be much more useful if they flushed the output handle
after each message. Then you know your trace messages will be
displayed/written to a file.

On Mon, Oct 19, 2009 at 1:51 PM, Thomas Hartman tphya...@gmail.com wrote:
 I have this and a couple other handy functions in

 DebugTraceHelpers:

 http://patch-tag.com/r/tphyahoo/DebugTraceHelpers/snapshot/current/content/pretty

 hackage:

 http://hackage.haskell.org/packages/archive/DebugTraceHelpers/0.12/doc/html/Debug-Trace-Helpers.html


 2009/10/16 Martijn van Steenbergen mart...@van.steenbergen.nl:
 Hello,

 I propose the addition of the following two functions to module Debug.Trace:

 traceM :: Monad m = String - m ()
 traceM msg = trace msg (return ())

 traceShowM :: (Show a, Monad m) = a - m ()
 traceShowM = traceM . show

 These functions allow tracing in any do-block. I often define them myself; I
 think they are useful in general.

 Deadline: 23 October 2009.

 Martijn.
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Re: [Haskell-cafe] debugtracehelpers Re: traceM and traceShowM

2009-10-20 Thread Alberto G. Corona
I don't know why people use trace this way instead of in the reverse form:
debug = flip trace

this way I can isolate debug code in the right  from normal code:


main= do
   a - getChar
   b - getChar `debug`  (a=++ show a)
   let c= a+b`debug`  (b=++ show b)
   ...
and so on.

I saw it for the first time in the DrIFt libtary.


2009/10/20 Justin Bailey jgbai...@gmail.com

 These woudl be much more useful if they flushed the output handle
 after each message. Then you know your trace messages will be
 displayed/written to a file.

 On Mon, Oct 19, 2009 at 1:51 PM, Thomas Hartman tphya...@gmail.com
 wrote:
  I have this and a couple other handy functions in
 
  DebugTraceHelpers:
 
 
 http://patch-tag.com/r/tphyahoo/DebugTraceHelpers/snapshot/current/content/pretty
 
  hackage:
 
 
 http://hackage.haskell.org/packages/archive/DebugTraceHelpers/0.12/doc/html/Debug-Trace-Helpers.html
 
 
  2009/10/16 Martijn van Steenbergen mart...@van.steenbergen.nl:
  Hello,
 
  I propose the addition of the following two functions to module
 Debug.Trace:
 
  traceM :: Monad m = String - m ()
  traceM msg = trace msg (return ())
 
  traceShowM :: (Show a, Monad m) = a - m ()
  traceShowM = traceM . show
 
  These functions allow tracing in any do-block. I often define them
 myself; I
  think they are useful in general.
 
  Deadline: 23 October 2009.
 
  Martijn.
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  librar...@haskell.org
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[Haskell-cafe] debugtracehelpers Re: traceM and traceShowM

2009-10-19 Thread Thomas Hartman
I have this and a couple other handy functions in

DebugTraceHelpers:

http://patch-tag.com/r/tphyahoo/DebugTraceHelpers/snapshot/current/content/pretty

hackage:

http://hackage.haskell.org/packages/archive/DebugTraceHelpers/0.12/doc/html/Debug-Trace-Helpers.html


2009/10/16 Martijn van Steenbergen mart...@van.steenbergen.nl:
 Hello,

 I propose the addition of the following two functions to module Debug.Trace:

 traceM :: Monad m = String - m ()
 traceM msg = trace msg (return ())

 traceShowM :: (Show a, Monad m) = a - m ()
 traceShowM = traceM . show

 These functions allow tracing in any do-block. I often define them myself; I
 think they are useful in general.

 Deadline: 23 October 2009.

 Martijn.
 ___
 Libraries mailing list
 librar...@haskell.org
 http://www.haskell.org/mailman/listinfo/libraries

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