I have a really, really complicated set of string simplification rules (only it doesn't actually work on strings, I use stuff like
to get the results on the fly - also I never know beforehand which rule is applicable in a concrete situation). As you can imagine, 100 of these rules have at least one hidden typo.
Is it possible to partially "Hold" the execution with something like this pseudocode happening
>exec F[a,a] 3 steps F[b,a], rule 1 used F[b,b], rule 1 used F[c], rule 2 used Done >exec F[a,c] 1 steps F[b,c], rule 1 used Done
so I can then control by hand where a substition went haywire (which is luckily easy)? I.e. print out all intermediate results of the replacements?
F[x___,a,y___]? and similarly,