DrScheme's printer uses pretty-print, which does the reader shorthands. Robby
On Thu, Sep 10, 2009 at 12:07 PM, Ryan Culpepper <ry...@ccs.neu.edu> wrote: > Sam TH wrote: >> >> This program: >> >> #lang scheme >> >> (display (format "~a~n" '(scheme #,3))) >> (format "~a~n" '(scheme #,3)) >> (printf "~a~n" '(scheme #,3)) >> >> Produces these results: >> >> (scheme (unsyntax 3)) >> "(scheme (unsyntax 3))\n" >> (scheme #,3) >> >> which rather surprised me. Why is `printf' behaving differently from >> `format'? > > You ran this in DrScheme, right? They're the same in mzscheme. > > Output ports have procedures associated with them (see 'port-print-handler') > to customize printing. That's how, for example, printing a syntax object can > result in a snip being inserted into an editor. I guess DrScheme's output > port also does reader abbreviations. This might be connected to the output > style language preference. > > Ryan > _________________________________________________ > For list-related administrative tasks: > http://list.cs.brown.edu/mailman/listinfo/plt-dev > _________________________________________________ For list-related administrative tasks: http://list.cs.brown.edu/mailman/listinfo/plt-dev
