define-dspec-alias

define-dspec-alias Macro

Summary

Informs the dspec system that a definer expands into another definer.

Package

dspec

Signature

define-dspec-alias name lambda-list &body body

Arguments

`name`⇩	A symbol naming a definer.
`lambda-list`⇩	A list representing the parameters of a `name` dspec.
`body`⇩	Forms evaluated to yield a dspec.

Description

The macro define-dspec-alias works rather like deftype. Dspecs whose car is name should have parameters that match lambda-list. They will be canonicalized into the dspec returned by body.

define-dspec-alias is useful when you add a new way of making existing definitions with a new defining form that expands into a system-provided defining form. The dspec system should consider the new and system-provided definers as variant forms of the same dspec class. define-dspec-alias is used to convert one of them to the other during canonicalization by canonicalize-dspec.

Examples

defparameter is pre-defined as an alias for defvar.