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| ANSI Common Lisp 4 Types and Classes 4.4 Dictionary of Types and Classes
4.4.18 member | Type Specifier
Compound Type Specifier Kind: Combining. Compound Type Specifier Syntax: `(member {object}*)` Compound Type Specifier Arguments: object - an object. Compound Type Specifier Description: This denotes the set containing the named objects. An object is of this type if and only if it is eql to one of the specified objects. The type specifiers `(member)` and nil are equivalent. * can be among the objects, but if so it denotes itself (the symbol *) and does not represent an unspecified value. The symbol member is not valid as a type specifier; and, specifically, it is not an abbreviation for either `(member)` or `(member *)`. See Also: the type eql Allegro CL Implementation Details: None.

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