close-port -- r7rs Definition

§

Kind

§

procedure;

Implemented by

§

• close-port (from vonuvoli);

Procedure signature

§

Procedure variants:

• ((input-port-open) -> (undefined))
  • input: a value of type input-port-open;
  • output: a value of type undefined;
• ((input-port-closed) -> (undefined))
  • input: a value of type input-port-closed;
  • output: a value of type undefined;
• ((output-port-open) -> (undefined))
  • input: a value of type output-port-open;
  • output: a value of type undefined;
• ((output-port-closed) -> (undefined))
  • input: a value of type output-port-closed;
  • output: a value of type undefined;

Exports

§

• scheme:base -- (scheme base);

Exports recursive

§

• scheme -- (scheme);

Description

§

(close-port port)
(close-input-port port)
(close-output-port port)

Closes the resource associated with port, rendering the port incapable of delivering or accepting data. It is an error to apply the last two procedures to a port which is not an input or output port, respectively. Scheme implementations may provide ports which are simultaneously input and output ports, such as sockets; the close-input-port and close-output-port procedures can then be used to close the input and output sides of the port independently.

These routines have no effect if the port has already been closed.

---

The text herein was sourced and adapted as described in the "R7RS attribution of various text snippets" appendix.

Referenced-types

§

• input-port-open;
• undefined;
• input-port-closed;
• output-port-open;
• output-port-closed;