Matt Wette <matt.we...@gmail.com> writes: > In C I can use `#ifdef' .. `#endif' to "comment out" code segments. > > In Scheme, one can use `#|' and '|#' which is OK but requires dealing with > both ends of the > segment to switch on / off. And emacs (v 24.5) scheme mode does not always > fontify the buffer > correctly with #|...|#. > > I can use (if #f (begin ....)) but it's not pretty and indents 4 spaces (or > an ugly 1 space). > > I tried using cond-expand but it does not work as expected: > scheme@(guile-user)> (cond-expand-provide (current-module) '(abc)) > $1 = (abc) > scheme@(guile-user)> (cond-expand (abc #t)) > While compiling expression: > Syntax error: > unknown file:2:0: cond-expand: unfulfilled cond-expand in form (cond-expand > (abc #t)) > > My current attempt is to add this: > > (define-syntax-rule (if-true form ...) (begin form ...)) > (define-syntax-rule (if-false form ...) (begin)) > > (if-false > (define x ...) > ... > ) > > (if-true > (define x ...) > ... > ) > > Any other solutions / suggestions?
Maybe you can try to use #; to comment out s-exp? I prefer this way because it feels very lispy to me.
signature.asc
Description: PGP signature
