public object VisitSwitchStatement(SwitchStatement switchStatement, object data)
{
// We have a problem: given is still not implemented in boo.
// So here's the if / else workaround:
string oldSwitchTempName = currentSwitchTempName;
currentSwitchTempName = GenerateName();
ArrayList l = new ArrayList(3);
B.BinaryExpression init = new B.BinaryExpression(B.BinaryOperatorType.Assign,
new B.ReferenceExpression(currentSwitchTempName),
ConvertExpression(switchStatement.SwitchExpression));
l.Add(new B.ExpressionStatement(init));
B.IfStatement dummyStatement = new B.IfStatement(GetLexicalInfo(switchStatement));
B.IfStatement first = null;
B.IfStatement current = dummyStatement;
B.BreakStatement bs;
for (int i = 0; i < switchStatement.SwitchSections.Count; i++)
{
current = (B.IfStatement)((INode)switchStatement.SwitchSections[i]).AcceptVisitor(this, current);
if (i == 0)
{
first = current;
}
bs = GetLastStatement(current.TrueBlock) as B.BreakStatement;
if (bs != null)
{
bs.ReplaceBy(null);
}
}
bs = GetLastStatement(current.FalseBlock) as B.BreakStatement;
if (bs != null)
{
bs.ReplaceBy(null);
}
string endSwitchName = currentSwitchTempName + "_end";
first.Accept(new ReplaceBreakStatementsVisitor(endSwitchName));
FindUnneededLabelsVisitor fulv = new FindUnneededLabelsVisitor(currentSwitchTempName + "_", nameComparer);
first.Accept(fulv);
bool needsEndLabel = fulv.NeededLabels.Contains(endSwitchName);
fulv.RemoveLabels(); // remove "goto case" labels that aren't needed
currentSwitchTempName = oldSwitchTempName;
if (first == dummyStatement)
{
l.AddRange(dummyStatement.FalseBlock.Statements);
}
else
{
l.Add(first);
}
if (needsEndLabel)
{
l.Add(MakeLabel(endSwitchName));
}
return(l);
}
