It's not the default because most examples don't need pretty printing, and initializing a sandbox with the pretty printer takes twice as long.
At Sun, 28 Aug 2011 12:05:51 -0400, Matthias Felleisen wrote: > > Shouldn't the pretty-print version be the default one? How often would I want > to write documentation that doesn't pretty print? > > -- Matthias > > > > On Aug 27, 2011, at 4:07 PM, Matthew Flatt wrote: > > > At Sat, 27 Aug 2011 13:22:12 -0400, Matthias Felleisen wrote: > >> > >> When you run this program, you don't get the pretty printing you get in > plain > >> Racket or in Dr. Why? > > > > The default evaluator for `interaction' is analogous to > > > > racket -l racket/base -i > > > > where `pretty-print' isn't installed as the printer. > > > > The example below illustrates how to install pretty printing into an > > `interaction' sandbox. > > > > ---------------------------------------- > > #lang scribble/manual > > > > @(require scribble/eval) > > > > @(define ex-eval (make-base-eval)) > > @(interaction-eval > > #:eval ex-eval > > (begin > > (require racket/pretty) > > (current-print pretty-print-handler))) > > > > @interaction[ > > #:eval ex-eval > > (define (f x) > > `(,(build-list x add1) > > ,(build-list x add1))) > > (f 20) > > ] > > > > @(close-eval ex-eval) > > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
