// LabeledStatementNoShortIf ::= 'Identifier' ':' StatementNoShortIf
//optimize push/pop
Statement statement = (Statement) this.astStack[this.astPtr];
this.astStack[this.astPtr] =
new LabeledStatement(
this.identifierStack[this.identifierPtr],
statement,
this.identifierPositionStack[this.identifierPtr--],
this.endStatementPosition);
this.identifierLengthPtr--;