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.

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

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 LispWorks 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