display -- r7rs Definition

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Kind

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procedure;

Implemented by

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• display (from vonuvoli);

Procedure signature

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Procedure variants:

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

Exports

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• scheme:write -- (scheme write);

Exports recursive

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• scheme -- (scheme);

Description

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(display obj)
(display obj port)

Writes a representation of obj to the given textual output port. Strings that appear in the written representation are output as if by write-string instead of by write. Symbols are not escaped. Character objects appear in the representation as if written by write-char instead of by write.

The display representation of other objects is unspecified. However, display must not loop forever on self-referencing pairs, vectors, or records. Thus if the normal write representation is used, datum labels are needed to represent cycles as in write.

Implementations may support extended syntax to represent record types or other types that do not have datum representations.

The display procedure returns an unspecified value.

Rationale: The write procedure is intended for producing machine-readable output and display for producing human-readable output.

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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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• value;
• undefined;
• textual-output-port-open;