Thanks greatly for the quick response. By the way, the documentation in 7.5.2 says,
"This module exports the entire structure definition: posn, posn?, posn-x, posn-y, set-posn-x!, and set-posn-y!." but structs no longer define mutators by default. --Dan On Wed, Nov 30, 2011 at 10:18 AM, Carl Eastlund <[email protected]> wrote: > On Wed, Nov 30, 2011 at 1:09 PM, Dan Grossman <[email protected]> wrote: >> DrRacket version 5.1.3: >> >> file contents: >> >> #lang racket >> (provide (contract-out (x integer?))) >> (define x 3) >> >> run result: >> >> contract-out: not a provide sub-form in: (contract-out (x integer?)) >> >> Do I need to upgrade to 5.2? > > Yes, contract-out did not exist before 5.2. > >> (I'm following the documentation at >> http://docs.racket-lang.org/guide/contract-boundaries.html.) >> >> Thanks! >> >> --Dan _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
