Two definitions for a variable in the same scope never works. In the first case, Matthew would probably say "the top level is broken." -- Matthias
On Dec 21, 2011, at 11:16 PM, Harry Spier wrote: > Can someone explain why this example from the Racket Guide allows a > re-definition of a constant but the second case (not from the Racket > Guide) gives an error. Both are executed in the interactions window of > DrRacket. > > Many thanks, > Harry > >> (compile-enforce-module-constants #f) >> (module m2 racket > (provide pie) > (define pie 3.141597)) >> (require 'm2) >> (module m2 racket > (provide pie) > (define pie 3)) >> pie > 3 >> > > > BUT > >> (compile-enforce-module-constants #f) >> (module m2 racket > (provide pie) > (define pie 3) > (define pie 4)) > . > gives the error: module: duplicate definition for identifier in: pie >> > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
