[Haskell-cafe] debugtracehelpers Re: traceM and traceShowM

[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 <tphyahoo at 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 <martijn at 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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>>
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