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])}*]) 

• GENERIC-FLET-POORLY-DESIGNED:DELETE