public virtual object VisitSwitchStatement(SwitchStatement switchStatement, object data) {
throw new global::System.NotImplementedException("SwitchStatement");
}
public virtual object VisitSwitchStatement(SwitchStatement switchStatement, object data) {
Debug.Assert((switchStatement != null));
Debug.Assert((switchStatement.SwitchExpression != null));
Debug.Assert((switchStatement.SwitchSections != null));
switchStatement.SwitchExpression.AcceptVisitor(this, data);
foreach (SwitchSection o in switchStatement.SwitchSections) {
Debug.Assert(o != null);
o.AcceptVisitor(this, data);
}
return null;
}
public virtual object VisitSwitchStatement(SwitchStatement switchStatement, object data) {
Debug.Assert((switchStatement != null));
Debug.Assert((switchStatement.SwitchExpression != null));
Debug.Assert((switchStatement.SwitchSections != null));
nodeStack.Push(switchStatement.SwitchExpression);
switchStatement.SwitchExpression.AcceptVisitor(this, data);
switchStatement.SwitchExpression = ((Expression)(nodeStack.Pop()));
for (int i = 0; i < switchStatement.SwitchSections.Count; i++) {
SwitchSection o = switchStatement.SwitchSections[i];
Debug.Assert(o != null);
nodeStack.Push(o);
o.AcceptVisitor(this, data);
o = (SwitchSection)nodeStack.Pop();
if (o == null)
switchStatement.SwitchSections.RemoveAt(i--);
else
switchStatement.SwitchSections[i] = o;
}
return null;
}
void SelectStatement(out Statement statement) {
Expression expr = null;
Expect(197);
if (la.kind == 74) {
Get();
}
Expr(out expr);
EndOfStmt();
List<SwitchSection> selectSections = new List<SwitchSection>();
Statement block = null;
while (la.kind == 74) {
List<CaseLabel> caseClauses = null; Location caseLocation = la.Location;
Get();
CaseClauses(out caseClauses);
if (IsNotStatementSeparator()) {
Expect(21);
}
EndOfStmt();
SwitchSection selectSection = new SwitchSection(caseClauses);
selectSection.StartLocation = caseLocation;
Block(out block);
selectSection.Children = block.Children;
selectSection.EndLocation = t.EndLocation;
selectSections.Add(selectSection);
}
statement = new SwitchStatement(expr, selectSections);
Expect(113);
Expect(197);
}
public sealed override object VisitSwitchStatement(SwitchStatement switchStatement, object data) {
this.BeginVisit(switchStatement);
object result = this.TrackedVisitSwitchStatement(switchStatement, data);
this.EndVisit(switchStatement);
return result;
}
public virtual object TrackedVisitSwitchStatement(SwitchStatement switchStatement, object data) {
return base.VisitSwitchStatement(switchStatement, data);
}
public override object VisitSwitchStatement(SwitchStatement switchStatement, object data)
{
// switch(arg) { case label1: expr1; case label2: expr2; default: expr3; }
//
// Emulate With:
//
// object _switch1 = arg;
// if (arg.Equals(label1))
// {
// expr1;
// }
// else
// {
// if (arg.Equals(label2))
// {
// expr2;
// }
// else
// {
// expr3;
// }
// }
//
switchId++; // in case nested switch() statements
string name = "_switch" + switchId.ToString();
breakableStack.Push(new Breakable(false));
bool isSwitchArg = false;
CodeVariableReferenceExpression switchArg = null;
SwitchSection defaultSection = null;
// get default section
foreach (SwitchSection section in switchStatement.SwitchSections)
{
foreach (CaseLabel label in section.SwitchLabels)
{
if (label.IsDefault)
{
defaultSection = section;
break;
}
}
if (defaultSection != null)
break;
}
CodeConditionStatement _if = null;
// get default section
foreach (SwitchSection section in switchStatement.SwitchSections)
{
if (section != defaultSection)
{
if (!isSwitchArg)
{
isSwitchArg = true;
codeStack.Push(NullStmtCollection);
CodeVariableDeclarationStatement switchStmt = new CodeVariableDeclarationStatement("System.Object", name, (CodeExpression)switchStatement.SwitchExpression.AcceptVisitor(this, data));
codeStack.Pop();
switchArg = new CodeVariableReferenceExpression(name);
AddStmt(switchStmt);
AddStmt(new CodeSnippetStatement());
}
codeStack.Push(NullStmtCollection);
CodeExpression condition = null;
foreach (CaseLabel label in section.SwitchLabels)
{
CodeMethodInvokeExpression cond = new CodeMethodInvokeExpression(switchArg, "Equals", (CodeExpression)label.Label.AcceptVisitor(this, data));
if (condition == null)
{
condition = cond;
}
else
{
condition = new CodeBinaryOperatorExpression(condition, CodeBinaryOperatorType.BooleanOr, cond);
}
}
codeStack.Pop();
if (_if == null)
{
_if = new CodeConditionStatement();
_if.Condition = condition;
AddStmt(_if);
}
else
{
CodeConditionStatement _if2 = new CodeConditionStatement();
_if2.Condition = condition;
_if.FalseStatements.Add(_if2);
_if = _if2;
}
codeStack.Push(_if.TrueStatements);
for (int i = 0; i < section.Children.Count; i++)
{
INode stmt = section.Children[i];
// if (i == section.Children.Count - 1 && stmt is BreakStatement)
// break;
stmt.AcceptVisitor(this, data);
}
codeStack.Pop();
}
}
if (defaultSection != null)
{
if (_if != null)
codeStack.Push(_if.FalseStatements);
for (int i = 0; i < defaultSection.Children.Count; i++)
{
INode stmt = defaultSection.Children[i];
// if (i == defaultSection.Children.Count - 1 && stmt is BreakStatement)
// break;
stmt.AcceptVisitor(this, data);
}
if (_if != null)
codeStack.Pop();
}
Breakable breakable = breakableStack.Pop();
if (breakable.IsContinue)
{
throw new Exception("Continue Inside Switch Not Supported");
}
if (breakable.IsBreak)
{
AddStmt(new CodeLabeledStatement("break" + breakable.Id, new CodeExpressionStatement(new CodeSnippetExpression())));
}
return null;
}