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| ANSI Common Lisp 3 Evaluation and Compilation 3.4 Lambda Lists ### 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.
Standardized Operators that use Specialized Lambda Lists
defmethod | defgeneric |
A specialized lambda list can contain the lambda list keywords shown in the next figure.
Lambda List Keywords used by Specialized Lambda Lists
&allow-other-keys | &key | &rest
&aux | &optional |
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 ] )`}`*`]`)

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