Defsetf Lambda Lists

A defsetf lambda list is used by defsetf.

A defsetf lambda list has the following syntax:

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

A defsetf lambda list can contain the lambda list keywords shown in Figure 3--19.

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

Figure 3--19: Lambda List Keywords used by Defsetf Lambda Lists

A defsetf lambda list differs from an ordinary lambda list only in that it does not permit the use of &aux, and that it permits use of &environment, which introduces an environment parameter.

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