Hi Martin, Can you not just use trace?
http://cvs.haskell.org/Hugs/pages/libraries/base/Debug-Trace.html f x = trace "in f " x g x = trace "in g" x That should show the order of evaluation. Chris. On 10 Jun 2010, at 18:44, Martin Drautzburg wrote: > On Thursday, 10. June 2010 00:08:34 Luke Palmer wrote: > >> Or just: >> >> apply = val_of > >> So, to summarize: if you have something that isn't a function and you >> want to use it like a function, convert it to a function (using >> another function :-P). That's all. No syntax magic, just say what >> you're doing. > > Thanks Luke > > The reason I was asking is the following: suppose I have some code which uses > some functions, and what it primarily does with those functions is CALL them > in different orders. > > Now at a later point in time I decide I need to give names to those > functions > because at the end I need to print information about the functions which > together solved a certain problem. Think of my problem as "In which order do > I have to call f,g,h such that (f.g.h) 42 = 42?". > > I don't want to change all places where those functions are called > into "apply" style. Therefore I was looking for some idiom like the python > __call__() method, which, when present, can turn just about anything into a > callable. > > I could change the *definition* of my original functions into "apply" style > and the rest of the code would not notice any difference. But that does not > really help, because in the end I want to Show something like [g,h,f], but my > functions would no longer carry names. > > Alternatively I could associate functions with names in some association > function, but that function simply has to "know to much" for my taste. > > The thing is, I only need the names at the very end. Throughout the majority > of the computation they should stay out of the way. > > > -- > Martin > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
