boolean? - test if an object is a boolean
(import (rnrs)) ;R6RS
(import (rnrs base)) ;R6RS
(import (scheme r5rs)) ;R7RS
(import (scheme base)) ;R7RS
Returns #t if obj is an exact integer object within the
fixnum range, #f otherwise.
Returns a single boolean object as per the description.
(boolean? #f) => #t
(boolean? 0) => #f
(boolean? '()) => #f
This procedure can raise exceptions with the following condition types:
- &assertion (R6RS)
The wrong number of arguments was passed.
The assertions described above are errors.
Implementations may signal an error, extend the procedure's
domain of definition to include such arguments,
or fail catastrophically.
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It includes materials from the RnRS documents.
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Markup created by unroff 1.0sc, March 04, 2023.