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====== Function VECTOR-POP ====== ====Syntax==== * **vector-pop** //vector// → //element// ====Arguments and Values==== * //vector// - a //[[CL:Glossary:vector]]// with a //[[CL:Glossary:fill pointer]]//. * //element// - an //[[CL:Glossary:object]]//. ====Description==== Decreases the //[[CL:Glossary:fill pointer]]// of //vector// by one, and retrieves the //[[CL:Glossary:element]]// of //vector// that is designated by the new //[[CL:Glossary:fill pointer]]//. ====Examples==== <blockquote> ([[CL:Macros:defparameter]] *fable* (list 'fable)) <r>*FABLE*</r> ([[CL:Macros:defparameter]] *fa* ([[CL:Functions:make-array]] 8 :fill-pointer 2 :initial-element 'sisyphus)) <r>*FA*</r> ([[CL:Functions:vector-push]] *fable* *fa*) <r>2</r> ([[CL:Functions:fill-pointer]] *fa*) <r>3</r> ([[CL:Functions:eq]] (vector-pop *fa*) *fable*) <r>//[[CL:Glossary:true]]// </r> (vector-pop *fa*) <r>SISYPHUS</r> ([[CL:Functions:fill-pointer]] *fa*) <r>1</r> </blockquote> ====Side Effects==== The //[[CL:Glossary:fill pointer]]// is decreased by one. ====Affected By==== The value of the //[[CL:Glossary:fill pointer]]//. ====Exceptional Situations==== An error of type **[[CL:Types:type-error]]** is signaled if //vector// does not have a //[[CL:Glossary:fill pointer]]//. If the //[[CL:Glossary:fill pointer]]// is zero, **[[CL:Functions:vector-pop]]** signals an error of type **[[CL:Types:error]]**. ====See Also==== **[[CL:Functions:vector-push|Function VECTOR-PUSH]]**, **[[CL:Functions:vector-push-extend|Function VECTOR-PUSH-EXTEND]]**, **[[CL:Functions:fill-pointer|Function FILL-POINTER]]** ====Notes==== None.