11 lines
302 B
Scheme
11 lines
302 B
Scheme
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(define mes '(0 1))
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(define (cond-expand-expander clauses)
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(let loop ((clauses clauses))
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(if (defined? (caar clauses))
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(eval (cons 'begin (cdar clauses)) (current-module))
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(loop (cdr clauses)))))
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(define-macro (cond-expand . clauses)
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`(cond-expand-expander (quote ,clauses)))
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