This site is a static rendering of the Trac instance that was used by R7RS-WG1 for its work on R7RS-small (PDF), which was ratified in 2013. For more information, see Home.

Source for wiki EmptyDefine version 3

author

cowan

comment

ipnr

127.11.51.1

name

EmptyDefine

readonly

text

== Empty definitions ==

I tested `(define x)` on the Scheme test suite.

Syntax error: Racket, Gauche, Bigloo, Kawa, Chibi, SCM, NexJ, STklos, !SigScheme, Shoe, Scheme 9, Dream, RScheme, S7, UMB, Oaklisp, Sizzle, Spark, Dfsch, Owl Lisp.

Variable is bound but not defined: MIT, Scheme48/scsh, Larceny.

Variable is bound to the implementation-specific "undefined result" value:  Gambit, Chicken, Guile, SISC, Chez, Vicare, Ypsilon, Mosh, !IronScheme, Sagittarius.

Variable is bound to the empty list, which also serves as the "undefined result" value: !TinyScheme, XLisp, Rep, Elk, Inlab.

Variable is bound to the empty list, which is ''not'' the "undefined result" value: VX.

Variable is bound to a thunk which returns itself and does not appear to have any side effects: SXM.

time

2014-12-28 08:28:36