Deftype Lambda Lists (original) (raw)

ANSI Common Lisp 3 Evaluation and Compilation 3.4 Lambda Lists

3.4.8 Deftype Lambda Lists

A deftype lambda list is used by deftype.

A deftype lambda list has the same syntax as a macro lambda list, and can therefore contain the lambda list keywords as a macro lambda list.

A deftype lambda list differs from a _macro lambda list_only in that if no init-form is supplied for an _optional parameter_or keyword parameter in the lambda-list, the default _value_for that parameter is the symbol * (rather than nil).