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8b5eb68238
They can be close()d explicitly with close-file-descriptor, and will close() on gc, but only explicitly closing the last port on them will close the fileno. Notably needed for network sockets where we open separate input and output ports on the same socket.
23 lines
909 B
Scheme
23 lines
909 B
Scheme
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(define-library (srfi 26)
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(export cut cute)
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(import (chibi))
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(begin
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(define-syntax %cut
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(syntax-rules (<> <...>)
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((%cut e? params args)
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(lambda params args))
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((%cut e? (params ...) (args ...) <> . rest)
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(%cut e? (params ... tmp) (args ... tmp) . rest))
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((%cut e? (params ...) (args ...) <...>)
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(%cut e? (params ... . tmp) (apply args ... tmp)))
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((%cut e? (params ...) (args ...) <...> . rest)
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(error "cut: non-terminal <...>"))
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((%cut #t (params ...) (args ...) x . rest)
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(let ((tmp x)) (%cut #t (params ...) (args ... tmp) . rest)))
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((%cut #f (params ...) (args ...) x . rest)
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(%cut #t (params ...) (args ... x) . rest))))
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(define-syntax cut
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(syntax-rules () ((cut args ...) (%cut #f () () args ...))))
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(define-syntax cute
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(syntax-rules () ((cute args ...) (%cut #t () () args ...))))))
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