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A destructuring lambda list is used by destructuring-bind.
Destructuring lambda lists are closely related to macro lambda lists; see Macro Lambda Lists. A destructuring lambda list can contain all of the lambda list keywords listed for macro lambda lists except for &environment, and supports destructuring in the same way. Inner lambda lists nested within a macro lambda list have the syntax of destructuring lambda lists.
A destructuring lambda list has the following syntax:
reqvars ::={var | !lambda-list}*
optvars ::=[&optional {var | ({var | !lambda-list} [init-form [supplied-p-parameter]])}*]
restvar ::=[{&rest | &body} {var | !lambda-list}]
keyvars ::=[&key {var | ({var | (keyword-name {var | !lambda-list})} [init-form [supplied-p-parameter]])}* [&allow-other-keys]]
auxvars ::=[&aux {var | (var [init-form])}*]
envvar ::=[&environment var]
wholevar ::=[&whole var]
lambda-list ::=(!wholevar !reqvars !optvars !restvar !keyvars !auxvars) | (!wholevar !reqvars !optvars . var)