at-location

Tells the dspec system of the source location.

dspec

at-location (location) &body body => result

`location`⇩	A pathname or a keyword.
`body`⇩	Forms, including defining forms.

result

The result of body.

The macro at-location informs the dspec system that the source for definitions done during the execution of body are at the location location.

location is usually a pathname, for definitions occurring in a file or editor buffer with that pathname.

Other locations are reserved for internal use. These are:

An editor buffer	Defined in an editor buffer with no pathname.
`:listener`	Interactively defined.
`:unknown`	Defined without dspec information being recorded.
`:implicit`	An aggregate defined by the existence of a part.
(`:inside` `dspec` `loc`)	A subform of `dspec` at location `loc`.