Function
coerce function, allowing it to take any Common Lisp type specifier. common-lisp
coerce object result-type => result
A Lisp object.
A type specifier.
An object of type result-type
coerce function still performs those conversions required by the standard, but a larger set of type specifiers is allowed for coercion. Atype-error is signalled if result cannot be returned as the result-type specifies. concatenate