u8-ready? -- r7rs Definition

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Kind

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predicate;

Implemented by

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• u8-ready? (from vonuvoli);

Procedure signature

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Procedure variants:

• (() -> (boolean))
  • inputs: none;
  • output: a value of type boolean;
• ((binary-input-port-eof) -> (true))
  • input: a value of type binary-input-port-eof;
  • output: a value of type true;
• ((binary-input-port-open) -> (boolean))
  • input: a value of type binary-input-port-open;
  • output: a value of type boolean;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(u8-ready?)
(u8-ready? port)

Returns #t if a byte is ready on the binary input port and returns #f otherwise. If u8-ready? returns #t then the next read-u8 operation on the given port is guaranteed not to hang. If the port is at end of file then u8-ready? returns #t.

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

Referenced-types

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• boolean;
• binary-input-port-eof;
• true;
• binary-input-port-open;