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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// **[[CL:Types:standard-class]]**) //''&rest'' initargs// * **allocate-instance** (//class// **[[CL:Types:structure-class]]**) //''&rest'' initargs// ====Arguments and Values==== * //class// - a //[[CL:Glossary:class]]//. * //initargs// - a //[[CL:Glossary:list]]// of //[[CL:Glossary:keyword/value pair|keyword/value pairs]]// (initialization argument //[[CL:Glossary:name|names]]// and //[[CL:Glossary:value|values]]//). * //new-instance// - an //[[CL:Glossary:object]]// whose //[[CL:Glossary: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 //[[CL:Glossary:standard class]]//, this means that the //[[CL:Glossary:slot|slots]]// are //[[CL:Glossary:unbound]]//; when the //[[CL:Glossary:class]]// is a //[[CL:Glossary:structure class]]//, this means the //[[CL:Glossary:slot|slots]]//' //[[CL:Glossary:values]]// are unspecified. The caller of **allocate-instance** is expected to have already checked the initialization arguments. The //[[CL:Glossary:generic function]]// **allocate-instance** is called by **[[CL:Functions:make-instance]]**, as described in \secref\ObjectCreationAndInit. ====Affected By==== None. ====Exceptional Situations==== None. ====See Also==== * **[[CL:Macros:defclass|Macro DEFCLASS]]** * **[[CL:Functions:make-instance|Generic Function MAKE-INSTANCE]]** * **[[CL:Functions:class-of|Function CLASS-OF]]** * {\secref\ObjectCreationAndInit} ====Notes==== The consequences of adding //[[CL:Glossary:method|methods]]// to **allocate-instance** is unspecified. This capability might be added by the //[[CL:Glossary:Metaobject Protocol]]//. \issue{ALLOCATE-INSTANCE:ADD} \issue{INITIALIZATION-FUNCTION-KEYWORD-CHECKING}