private SpokeSwitch evaluateSwitch(TokenEnumerator enumerator,
int tabIndex, evalInformation inf) {
enumerator.MoveNext();
SpokeSwitch sw = new SpokeSwitch((SpokeItem) eval(enumerator, tabIndex,new evalInformation(inf){ResetCurrentVal=true}));
List<SpokeSwitch.Case> als = new List<SpokeSwitch.Case>();
while (true) {
if (enumerator.PeakNext() is TokenTab) {
enumerator.MoveNext();
if (((TokenTab) enumerator.Current).TabIndex == tabIndex + 1) {
enumerator.MoveNext();
SpokeItem jf = (SpokeItem) eval(enumerator, tabIndex,
new evalInformation(inf){ResetCurrentVal=true});
Debug.Assert(enumerator.Current is TokenColon,"case bad");
enumerator.MoveNext();
enumerator.MoveNext();
List<SpokeLine> gc = getLines(enumerator,
tabIndex + 2, new evalInformation(inf));
als.Add(new SpokeSwitch.Case(jf,gc.ToArray()));
Debug
.Assert(enumerator.Current.Type == Token.NewLine
|| enumerator.Current.Type == Token.EndOfCodez,
enumerator.Current.Type
+ " Isnt Newline");
}
continue;
}
break;
}
sw.Cases = als.ToArray();
if (enumerator.Current.Type == Token.Tab && inf.EatTab)
enumerator.MoveNext();
return sw;
}
private void evaluateSwitch(SpokeMethodParse currentObject,
SpokeVariableInfo variables,
SpokeSwitch spokeLine)
{
SpokeType df;
SpokeType b = evaluateItem(spokeLine.Condition, currentObject,
variables);
for (int i = 0; i < spokeLine.Cases.Length; i++)
{
SpokeSwitch.Case c = spokeLine.Cases[i];
if (i != 0)
{
new SpokeInstruction(SpokeInstructionType.Label, "Case" + i
+ "_" + spokeLine.Guid);
}
SpokeType curCase = evaluateItem(c.Item, currentObject,
variables);
if (b.Type != curCase.Type)
{
throw new Exception("Expected " + b.Type);
}
if ((i + 1 == spokeLine.Cases.Length))
{
new SpokeInstruction(SpokeInstructionType.Equal);
new SpokeInstruction(
SpokeInstructionType.IfTrueContinueElse,
"EndSwitch" + spokeLine.Guid);
}
else
{
new SpokeInstruction(
SpokeInstructionType.IfEqualsContinueAndPopElseGoto,
"Case" + (i + 1) + "_" + spokeLine.Guid);
if (c.Lines.Length == 0)
{
for (int j = i + 1; j < spokeLine.Cases.Length; j++)
{
SpokeSwitch.Case cj = spokeLine.Cases[j];
if (cj.Lines.Length > 0)
{
cj.NeedsTop = true;
new SpokeInstruction(SpokeInstructionType.Goto, "top" + "Case" + (j) + "_" + spokeLine.Guid);
break;
}
}
}
}
if (c.NeedsTop)
{
new SpokeInstruction(SpokeInstructionType.Label, "top" + "Case" + (i) + "_" + spokeLine.Guid);
}
variables.IncreaseState();
df = evaluateLines(ref c.Lines,
currentObject, variables);
variables.DecreaseState();
if (currentObject.ReturnType != null
&& !currentObject.ReturnType.CompareTo(df, true))
{
throw new Exception("for return: Expected "
+ currentObject.ReturnType.Type + " Got" + df.Type);
}
new SpokeInstruction(SpokeInstructionType.Goto, "EndSwitch"
+ spokeLine.Guid);
}
new SpokeInstruction(SpokeInstructionType.Label, "EndSwitch"
+ spokeLine.Guid);
}
