output-port-type?
output-port?
port-position
+ port-type/%operation
port-type/char-ready?
port-type/discretionary-flush-output
port-type/flush-output
port-type/write-char
port-type/write-substring
port-type?
+ port/%operation
+ port/%state
+ port/%type
port/coding
port/copy
port/get-property
with-output-to-port
with-trace-output-port)
(export (runtime input-port)
+ port/%operation/read-char
+ port/%operation/peek-char
port/operation/char-ready?
port/operation/peek-char
port/operation/read-char
port/operation/read-substring
port/operation/unread-char)
(export (runtime output-port)
+ port/%operation/discretionary-flush-output
+ port/%operation/write-char
port/operation/discretionary-flush-output
port/operation/flush-output
port/operation/fresh-line