make-parameter -- r7rs Definition

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Kind

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constructor;

Implemented by

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• make-parameter (from vonuvoli);

Procedure signature

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Procedure variants:

• (((initial any)) -> (parameter))
  • input: initial of type any;
  • output: a value of type parameter;
• (((initial any) (converter procedure-1)) -> (parameter))
  • inputs:
    • initial of type any;
    • converter of type procedure-1;
  • output: a value of type parameter;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(make-parameter init)
(make-parameter init converter)

Returns a newly allocated parameter object, which is a procedure that accepts zero arguments and returns the value associated with the parameter object. Initially, this value is the value of (converter init), or of init if the conversion procedure converter is not specified. The associated value can be temporarily changed using parameterize, which is described below.

The effect of passing arguments to a parameter object is implementation-dependent.

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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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• any;
• parameter;
• procedure-1;