54 lines
1.5 KiB
Scheme
54 lines
1.5 KiB
Scheme
(define-library (srfi 26)
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(import (scheme base)
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(picrin macro)
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(srfi 1))
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(define-macro cut%
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(ir-macro-transformer
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(lambda (form inject compare?)
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(let ((slots (second form))
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(combi (third form))
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(se (cdddr form)))
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(cond ((null? se)
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`(lambda ,slots ((begin ,(car combi)) ,@(cdr combi))))
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((and (symbol? (car se))
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(compare? (car se) '<...>))
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`(lambda (,@slots . rest-slot) (apply ,@combi rest-slot)))
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((and (symbol? (car se))
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(compare? (car se) '<>))
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`(cut% (,@slots x) (,@combi x) ,@(cdr se)))
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(else `(cut% ,slots (,@combi ,(car se)) ,@(cdr se))))))))
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(define-macro cute%
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(ir-macro-transformer
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(lambda (form inject compare?)
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(let ((slots (second form))
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(binds (third form))
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(combi (fourth form))
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(se (cddddr form)))
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(cond ((null? se)
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`(let ,binds
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(lambda ,slots ((begin ,(car combi)) ,@(cdr combi)))))
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((and (symbol? (car se))
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(compare? (car se) '<...>))
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`(let ,binds
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(lambda (,@slots . rest-slot) (apply ,@combi rest-slot))))
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((and (symbol? (car se))
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(compare? (car se) '<>))
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`(cute% (,@slots x) ,binds (,@combi x) ,@(cdr se)))
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(else
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`(cute% ,slots ((x ,(car se)) ,@binds)
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(,@combi x) ,@(cdr se))))))))
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(define-macro cut
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(ir-macro-transformer
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(lambda (form inject compare?)
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`(cut% () () ,@(cdr form)))))
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(define-macro cute
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(ir-macro-transformer
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(lambda (form inject compare?)
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`(cute% () () () ,@(cdr form)))))
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(export cut cute))
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