3.4.5 Destructuring Lambda Lists
A destructuring lambda list is used by destructuring-bind.
Destructuring lambda lists are closely related to
macro lambda lists; see Section 3.4.4 (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]])}*]
- restvars::=
- [{&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)