CLHS: Standard Generic Function ALLOCATE-INSTANCE

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Standard Generic Function ALLOCATE-INSTANCE

Syntax:

allocate-instance class `&rest` initargs `&key` `&allow-other-keys` => new-instance

Method Signatures:

allocate-instance (class standard-class) `&rest` initargs

allocate-instance (class structure-class) `&rest` initargs

Arguments and Values:

class---a class.

initargs---a list of keyword/value pairs (initialization argument names and values).

new-instance---an object whose class is class.

Description:

The generic function allocate-instance creates and returns a new instance of the class, without initializing it. When the class is a standard class, this means that the slots are unbound; when the class is a structure class, this means the slots' values are unspecified.

The caller of allocate-instance is expected to have already checked the initialization arguments.

The generic function allocate-instance is called by make-instance, as described in Section 7.1 (Object Creation and Initialization).

Affected By: None.

Exceptional Situations: None.

See Also:

defclass, make-instance, class-of, Section 7.1 (Object Creation and Initialization)

Notes:

The consequences of adding methods to allocate-instance is unspecified. This capability might be added by the Metaobject Protocol.

The following X3J13 cleanup issues, not part of the specification, apply to this section:

- INITIALIZATION-FUNCTION-KEYWORD-CHECKING
- ALLOCATE-INSTANCE:ADD

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