Macro Seq

Part of:

package fset
( seq &rest args )
Constructs a seq of the default implementation according to the supplied
argument subforms. Each argument subform can be an expression whose value is
to appear in the sequence; or a list of the form ($ expression), in which
case the expression must evaluate to a sequence, all of whose values appear in
the result sequence. The order of the result sequence reflects the order of
the argument subforms.