set-clos-initarg-checking Function

Summary

Switches initarg checking on or off in make-instance, reinitialize-instance, change-class and so on.

Package

clos

Signature

set-clos-initarg-checking on => on

Arguments

on⇩	A generalized boolean.

Values

on	A generalized boolean.

Description

The function set-clos-initarg-checking provides control over whether CLOS checks initialization arguments. Initializations affected include:

• Calls to make-instance
• Calls to reinitialize-instance
• Calls to change-class
• call-next-method to update-instance-for-redefined-class with extra keywords.

Calling set-clos-initarg-checking with a true value of on causes the above initializations to check their initargs. This is the initial state of LispWorks.

Initarg checking is switched off globally and dynamically by:

(set-clos-initarg-checking nil)

Notes

1. The effect of calling set-clos-initarg-checking can be overridden in a runtime by the deliver keyword argument :clos-initarg-checking. See the Delivery User Guide for details.
2. set-clos-initarg-checking supersedes set-make-instance-argument-checking.

See also

class-extra-initargs
compute-class-potential-initargs
deliver
make-instance