Re: Reliability of trace?

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"Isaac" == Isaac Dupree writes:

Isaac> Colin Paul Adams wrote: >> I'm trying to use Debug.Trace to debug some tree-walking that >> I've written. >> >> It seems to me that I am missing some traces on intermediate >> function calls. I guess that ghc is re-arranging the code in >> such a way that some of these intermediate calls >> disappear. Anyway of stopping this? I already specify -O0. Isaac> right; with -O0 you get pretty much the exact amount of Isaac> sharing that your code suggests Isaac> are you sure those traces are attached to expressions that Isaac> are being evaluated at all? Remember how lazy Haskell Isaac> is... I was was absolutely sure of what was happening, I wouldn't need to run a trace :-). But I do know certain things about what is happening, and I cannot see how the code can avoid some of these trace statements. Anyway, I think I know how to fix my code now. When I've done it, I'll put the traces back on, and see if I can understand what is happening. If not, I'll post the code here, and ask the question again, for future enlightenment. -- Colin Adams Preston Lancashire