char->integer -- r7rs Definition

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Kind

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converter;

Implemented by

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• char->integer (from vonuvoli);

Procedure signature

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Procedure variants:

• ((character-ascii) -> (code-point-ascii))
  • input: a value of type character-ascii;
  • output: a value of type code-point-ascii;
• ((character) -> (code-point-unicode))
  • input: a value of type character;
  • output: a value of type code-point-unicode;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(char->integer char)
(integer->char n)

Given a Unicode character, char->integer returns an exact integer between 0 and #xD7FF or between #xE000 and #x10FFFF which is equal to the Unicode scalar value of that character. Given a non-Unicode character, it returns an exact integer greater than #x10FFFF. This is true independent of whether the implementation uses the Unicode representation internally.

Given an exact integer that is the value returned by a character when char->integer is applied to it, integer->char returns that character.

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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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• character-ascii;
• code-point-ascii;
• character;
• code-point-unicode;