> On Dec 19, 2014, at 10:38 PM, Alexej Magura <agm2...@gmail.com> wrote: > > In Common Lisp, clisp specifically, you can test whether a symbol has been > bound, that is interned, or not using boundp; is there a way to do this in > Chicken? > > (boundp 'a) ; nil > (defvar a 1) > (boundp 'a) ; t > > I wrote up a function once a while back that used exception handling to check > if a symbol had been defined, but if there's already an egg that provides > this support or if it's built-in, I wanted to know so that I wouldn't have to > bother trying to rewrite said function.
Look at the symbol-utils egg unbound-value unbound-value? unbound? #;1> (use symbol-utils) #;2> (unbound? 'foo) #t #;3> (unbound? '+) #f > -- > Alexej Magura > _______________________________________________ > Chicken-users mailing list > Chicken-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/chicken-users
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