raise-continuable -- r7rs Definition

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Kind

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procedure;

Implemented by

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• raise-continuable (from vonuvoli);

Procedure signature

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Procedure variants:

• ((any) -> (exception))
  • input: a value of type any;
  • output: a value of type exception;

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(raise-continuable obj)

Raises an exception by invoking the current exception handler on obj. The handler is called with the same dynamic environment as the call to raise-continuable, except that: the current exception handler is the one that was in place when the handler being called was installed, and if the handler being called returns, then it will again become the current exception handler. If the handler returns, the values it returns become the values returned by the call to raise-continuable.

(with-exception-handler
  (lambda (con)
    (cond
      ((string? con)
       (display con))
      (else
       (display "a warning has been issued")))
    42)
  (lambda ()
    (+ (raise-continuable "should be a number")
       23)))
;   prints:  should be a number
       ===>  65

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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;
• exception;