ANSI Common Lisp 3 Evaluation and Compilation 3.3 Declarations
3.3.3 Declaration Identifiers
The next figure shows a list of all
defined by this standard.
Common Lisp Declaration Identifiers
An implementation is free to support other (implementation-defined)
declaration identifiers as well.
A warning might be issued
if a declaration identifier
is not among those defined above,
is not defined by the implementation,
is not a type name,
and has not been declared in a declaration proclamation.
188.8.131.52 Shorthand notation for Type Declarations