CLHS: Section 3.4.3

#

## 3.4.3 Specialized Lambda Lists

A specialized lambda list is used to specialize a method for a particular signature and to describe how arguments matching that signature are received by the method. The defined names in the next figure use specialized lambda lists in some way; see the dictionary entry for each for information about how.

    defmethod  defgeneric

Figure 3-15. Standardized Operators that use Specialized Lambda Lists

A specialized lambda list can contain the lambda list keywords shown in the next figure.

    &allow-other-keys  &key       &rest
    &aux               &optional

Figure 3-16. Lambda List Keywords used by Specialized Lambda Lists

A specialized lambda list is syntactically the same as an ordinary lambda list except that each required parameter may optionally be associated with a class or object for which that parameter is specialized.

    lambda-list::= ({var | (var [specializer])}*
                    [&optional {var | (var [init-form [supplied-p-parameter]])}*]
                    [&rest var]
                    [&key {var | ({var | (keyword-name var)} [init-form [supplied-p-parameter]])}* [&allow-other-keys]]
                    [&aux {var | (var [init-form])}*])

The following X3J13 cleanup issue, not part of the specification, applies to this section:

- GENERIC-FLET-POORLY-DESIGNED:DELETE

Copyright 1996-2005, LispWorks Ltd. All rights reserved.