On Sat, 06 Mar 2021, Taylan Kammer <taylan.kam...@gmail.com> wrote: > On 06.03.2021 01:31, Olivier Dion via General Guile related discussions > wrote: >> You've quoted the whole s-exp. Which means lambda is never applied. >> You have to apply lambda in order to create a procedure. > > Just a bit of pedantry on the terms: 'lambda' is not "applied" anyway, > because it's a special form and not a procedure. > > The term "apply" is used when referring to procedures. E.g. you would > apply 'list', 'cons', 'vector-ref' and so on, but you wouldn't apply > 'lambda', 'if', 'define' and so on. > > In other words, if you can pass it as an argument to 'apply', you can > "apply" it. E.g. '(apply lambda (list ...))' is invalid syntax. > > I think the term "evaluate" would be preferred here, as in: "the > 'lambda' is quoted so it won't be evaluated."
You're totally right! Lambda is evaluated to a closure. The latter is then applied to evaluate its expressions in the captured environment. The following video explains the metacircular evaluator in great details! Highly recommend all other lectures as well :-) <https://www.youtube.com/watch?v=aAlR3cezPJg&t=743s> > > - Taylan -- Olivier Dion PolyMtl
