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Dylan does, and my language Slate (http://www.slatelanguage.org) does, as well as its related younger siblings, Atomo (http://atomo-lang.org) and Atomy (http://atomy-lang.org). And all of these implement them in the context of an object model, rather than carefully avoiding CLOS dependencies as in CL.

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I just added conditions & restarts today to Fancy (http://fancy-lang.org/). It's currently in a branch but it works =).

Thanks for doing that. More implementations means there's a wider spectrum of places for developers to learn these tools and maybe even improve on them.

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