procedure? - test if an object is a procedure
(import (rnrs)) ;R6RS
(import (rnrs base)) ;R6RS
(import (scheme r5rs)) ;R7RS
(import (scheme base)) ;R7RS
Returns #t if obj is a procedure, otherwise returns #f.
Returns a single boolean object as per the description.
(procedure? 'car) => #f
(procedure? (lambda (x) (* x x)))
(procedure? '(lambda (x) (* x x)))
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.
This page is part of the
It includes materials from the RnRS documents.
More information can be found at
Markup created by unroff 1.0sc, March 04, 2023.