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| ANSI Common Lisp 4 Types and Classes 4.4 Dictionary of Types and Classes
4.4.17 satisfies | Type Specifier
Compound Type Specifier Kind: Predicating. Compound Type Specifier Syntax: `(satisfies predicate-name)` Compound Type Specifier Arguments: predicate-name - a symbol. Compound Type Specifier Description: This denotes the set of all objects that satisfy the predicate predicate-name, which must be a symbol whose global function definition is a one-argument predicate. A name is required for predicate-name; lambda expressions are not allowed. For example, the type specifier `(and integer (satisfies evenp))` denotes the set of all even integers. The form `(typep x '(satisfies p))` is equivalent to `(if (p x) t nil)`. The argument is required. The symbol * can be the argument, but it denotes itself (the symbol *), and does not represent an unspecified value. The symbol satisfies is not valid as a type specifier. Allegro CL Implementation Details: None.

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