---
name: "Builtins.null"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/Builtins.null"
---

# Builtins.null(3kaya)

Checks if a foreign pointer is NULL

## NAME

Builtins::null - Checks if a foreign pointer is NULL

## SYNOPSIS

**Bool null(** *Ptr p* **)**

## ARGUMENTS

**p** The foreign **Ptr**  to check.

## DESCRIPTION

Returns true if the foreign pointer is NULL. This is useful in testing whether a foreign function returns something valid, before throwing an exception. This is the only way, in general, that **Ptr**  should be queried in Kaya; usually it is better to manipulate pointers C side.

## AUTHORS

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

## LICENSE

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.