capabilities of GHC API
simonmarhaskell at gmail.com
Tue May 22 03:49:55 EDT 2007
Frederik Eaton wrote:
>>> If you have GHC-6.6 or greater, try: let n = 2 in GHC.Base.breakpoint ()
>> GHC.Base.breakpoint doesn't work in the HEAD at the moment. We might want to restore it; I'm not sure. Since
>> breakpoints are almost everywhere, it didn't seem necessary.
> I don't understand the last sentence. Breakpoints didn't seem
> necessary since they are almost everywhere?
Sorry, that was a bit unclear. In the first implementation of breakpoints you
had to explicitly annotate breakpoints in your code using GHC.Base.breakpoint.
In the current implementation, the system adds a breakpoint to every
subexpression, and you enable them individually via GHCi commands. So there's
no need to use GHC.Base.breakpoint (and indeed it doesn't work now). See the
docs for details.
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