4.3.14 Complement type descriptors

The following syntactic bindings are exported by the library (vicare system type-descriptors).

Record Type: <complement-type-descr>

Name of type descriptors for the complement of a type descriptor. It has the following fields:

item-des

The type descriptor to be complemented.

Function: make-complement-type-descr des

Build and return a new instance of <complement-type-descr>.

Function: complement-type-descr? obj

Return #t if obj is an instance of <complement-type-descr>; otherwise return #f.

Function: complement-type-descr.item-des des

Accessor for the field of <complement-type-descr> instances.