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A PCRE internal error occured. This might be caused by a faulty plugin

====== Accessor SVREF ====== ====Syntax==== * **svref** //simple-vector index// → //element// * (**setf** (**svref** //simple-vector index//) //new-element//) ====Arguments and Values==== * //simple-vector// - a //[[CL:Glossary:simple vector]]//. * //index// - a //[[CL:Glossary:valid array index]]// for the //simple-vector//. * //element//, //new-element// - an //[[CL:Glossary:object]]// (whose //[[CL:Glossary:type]]// is a //[[CL:Glossary:subtype]]// of the //[[CL:Glossary:array element type]]// of the //simple-vector//). ====Description==== //[[CL:Glossary:access|Accesses]]// the //[[CL:Glossary:element]]// of //simple-vector// specified by //index//. ====Examples==== <blockquote> ([[CL:Macros:defparameter]] *v* ([[CL:Functions:vector]] 1 2 'sirens)) <r>*V*</r> ([[CL:Functions:simple-vector-p]] *v*) <r>//[[CL:Glossary:true]]// </r> (svref *v* 0) <r>1 </r> (svref *v* 2) <r>SIRENS </r> ([[CL:Macros:setf]] (svref *v* 1) 'newcomer) <r>NEWCOMER</r> *v* <r>#(1 NEWCOMER SIRENS) </r> </blockquote> ====Side Effects==== None. ====Affected By==== None. ====Exceptional Situations==== None. ====See Also==== **[[CL:Functions:aref|Function AREF]]**, **[[CL:Functions:sbit|Function SBIT]]**, **[[CL:Functions:schar|Function SCHAR]]**, **[[CL:Functions:vector|Function VECTOR]]**, {\secref\ConstantModification} ====Notes==== **[[CL:Functions:svref]]** is identical to **[[CL:Functions:aref]]** except that it requires its first argument to be a //[[CL:Glossary:simple vector]]//. <blockquote> (svref //v// //i//) ≡ ([[CL:Functions:aref]] ([[CL:Special Operators:the]] [[CL:Types:simple-vector]] //v//) //i//) </blockquote> \issue{CONSTANT-MODIFICATION:DISALLOW}