The next figure shows a list of all declaration identifiers defined by this standard.
declaration ignore special dynamic-extent inline type ftype notinline ignorable optimize
Figure 3-9. 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.
18.104.22.168 Shorthand notation for Type Declarations