id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	difficulty
1351	syntax-rules has difficulty handling ellipsis in some cases?	sjamaan	sjamaan	"As [http://lists.nongnu.org/archive/html/chicken-users/2017-03/msg00003.html reported by Sascha Ziemann], this macro application fails while it ought to succeed:

{{{
(define-syntax define-facts
  (syntax-rules ()
    ((_ (name a0 a1 ...) ((v00 v01 ...) (v10 v11 ...) ...))
     '(define (name a0 a1 ...)
        (conde
          ((== a0 v00) (== a1 v01) ...)
          ((== a0 v10) (== a1 v11) ...)
          ...)))))
}}}

The failing application:

{{{
(define-facts (fathero f c)
  ((""Abraham"" ""Ismael"")
   (""Abraham"" ""Isaac"")
   (""Isaac""   ""Jacob"")
   (""Jacob""   ""Benjamin"")))
}}}

A few other Schemes have difficulty with it, notably Chibi and Gambit.  Gauche, Racket and Guile work fine."	defect	new	major	someday	expander	4.12.0		syntax-rules		hard