On Tue, Oct 23, 2012 at 5:14 PM, Danny Yoo <d...@hashcollision.org> wrote: > The following program is generating a type error in 5.3.1, but I don't > understand it yet. > > ;;;;;;;;;;;;;;;;;;;;;;;;;;; > #lang typed/racket/base > > ;; We may have more information about the lambda's name. This will show it. > (define-struct: LamPositionalName ([name : Symbol] > [path : String] ;; the source of the > name > [line : Natural] > [column : Natural] > [offset : Natural] > [span : Natural]) #:transparent) > > > (: current-defined-name (Parameterof (U Symbol LamPositionalName))) > (define current-defined-name (make-parameter 'unknown))
To add, I can work around this behavior by doing: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (: UNKNOWN Symbol) (define UNKNOWN 'unknown) (: current-defined-name (Parameterof (U Symbol False LamPositionalName))) (define current-defined-name (make-parameter UNKNOWN)) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; but I'd still like to know why the earlier code doesn't work in 5.3.1. _________________________ Racket Developers list: http://lists.racket-lang.org/dev
