procedure? - test if an object is a procedure
LIBRARY
(import (rnrs)) ;R6RS
(import (rnrs base)) ;R6RS
(import (scheme r5rs)) ;R7RS
(import (scheme base)) ;R7RS
SYNOPSIS
(procedure? obj)
DESCRIPTION
Returns #t if obj is a procedure, otherwise returns #f.
RETURN VALUES
Returns a single boolean object as per the description.
EXAMPLES
(procedure? 'car) => #f
(procedure? (lambda (x) (* x x)))
=> #t
(procedure? '(lambda (x) (* x x)))
=> #f
ERRORS
This procedure can raise exceptions with the following condition types:
- &assertion (R6RS)
-
The wrong number of arguments was passed.
- R7RS
-
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.
STANDARDS
R4RS,
IEEE Scheme,
R5RS,
R6RS,
R7RS
AUTHORS
This page is part of the
scheme-manpages
project.
It includes materials from the RnRS documents.
More information can be found at
https://github.com/schemedoc/manpages/
.
Markup created by unroff 1.0sc, March 04, 2023.