private void ProcessWhileStatement(NodeBase statement)
{
Queue <NodeBase> children = GetChildren(statement);
Expect(children.Dequeue(), NodeType.Keyword, "while");
Expect(children.Dequeue(), NodeType.Symbol, "(");
int whileStatementNumber = vmWriter.GetWhileStatementNumber();
vmWriter.WhileStart(whileStatementNumber);
ProcessExpression(children.Dequeue());
vmWriter.WhileBreak(whileStatementNumber);
Expect(children.Dequeue(), NodeType.Symbol, ")");
Expect(children.Dequeue(), NodeType.Symbol, "{");
ProcessStatements(children.Dequeue());
Expect(children.Dequeue(), NodeType.Symbol, "}");
vmWriter.WhileEnd(whileStatementNumber);
}