In guile 1.6.3 on a recent i386 debian, I thought to make myself a
"define if not already defined" using
(use-modules (ice-9 syncase))
(define-syntax define-maybe
(syntax-rules ()
((define-maybe name value)
(if (not (defined? 'name))
(define name value)))))
(define-maybe x 123)
but run with "guile -s foo.scm" gives
/down/guile/usr/share/guile/1.6/ice-9/syncase.scm:130:16: In procedure scm-error
in expression (scm-error (quote misc-error) who ...):
/down/guile/usr/share/guile/1.6/ice-9/syncase.scm:130:16: invalid context for
definition of x
I guess I'm not sure if this is a bug, but
(if (not (defined? 'x))
(define x 123))
worked at the top-level, so I thought perhaps it could be expected to
in a macro too.
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