public void Next()
{
if (runtimeData.InstructionStack.Count > 0)
{
int id = runtimeData.InstructionStack.Pop();
if (id == InstructionStack.ROOT_FLAG)
{
root.Accept(visitor);
}
else if (id == InstructionStack.CLOSE_LOCAL_SCOPE_FLAG)
{
runtimeData.ScopeStack.Close();
Next();
}
else if (id == InstructionStack.CLOSE_FORMAL_SCOPE_FLAG)
{
runtimeData.ScopeStack.Close();
Next();
}
else if (id == InstructionStack.CALL_FLAG)
{
CallStackElement elem = runtimeData.CallStack.Pop();
Next();
}
else
{
root.NodeMap[id].Accept(visitor);
}
}
else
{
funcCaller.End();
}
}
public void Visit(ReturnStmt returnStmt, object[] args)
{
RightValue returnValue = exprProcessor.Eval(returnStmt.Expression);
int id;
do
{
id = kernel.RuntimeData.InstructionStack.Pop();
if (id == InstructionStack.CLOSE_LOCAL_SCOPE_FLAG)
{
kernel.RuntimeData.ScopeStack.Close();
}
else if (id == InstructionStack.CLOSE_FORMAL_SCOPE_FLAG)
{
kernel.RuntimeData.ScopeStack.Close();
}
else if (id == InstructionStack.CALL_FLAG)
{
CallStackElement elem = kernel.RuntimeData.CallStack.Pop();
if (elem.ReturnDest != null)
{
kernel.RuntimeData.ScopeStack.SetValue(elem.ReturnDest, returnValue);
}
}
} while (id != InstructionStack.CALL_FLAG);
kernel.Next();
}
public void Visit(FunctionCallStmt funcCallStmt, object[] args)
{
FormalScope formalScope = new FormalScope();
foreach (KeyValuePair <string, Expr.Expression> actual in funcCallStmt.ParamMap)
{
Expr.RightValue rightValue = exprProcessor.Eval(actual.Value);
formalScope.SetValue(actual.Key, rightValue);
}
kernel.RuntimeData.ScopeStack.Open(formalScope);
kernel.RuntimeData.ScopeStack.Open(new LocalScope());
kernel.RuntimeData.InstructionStack.Push(InstructionStack.CALL_FLAG);
kernel.RuntimeData.InstructionStack.Push(InstructionStack.CLOSE_LOCAL_SCOPE_FLAG);
kernel.RuntimeData.InstructionStack.Push(InstructionStack.CLOSE_FORMAL_SCOPE_FLAG);
kernel.RuntimeData.InstructionStack.Push(root.FuncDefMap[funcCallStmt.Name].FuncDefContent);
CallStackElement elem = new CallStackElement();
elem.Destination = root.FuncDefMap[funcCallStmt.Name];
elem.Location = funcCallStmt.Location;
elem.ReturnDest = exprProcessor.GetVarName(funcCallStmt.ReturnDest);
kernel.RuntimeData.CallStack.Push(elem);
kernel.Next();
}
public void Visit(IncludeStmt includeStmt, object[] args)
{
kernel.RuntimeData.ScopeStack.Open(new LocalScope());
kernel.RuntimeData.InstructionStack.Push(InstructionStack.CALL_FLAG);
//kernel.RuntimeData.InstructionStack.Push(InstructionStack.CLOSE_FORMAL_SCOPE_FLAG);
kernel.RuntimeData.InstructionStack.Push(InstructionStack.CLOSE_LOCAL_SCOPE_FLAG);
kernel.RuntimeData.InstructionStack.Push(root.SubPlotMap[includeStmt.SubPlot].Content);
CallStackElement elem = new CallStackElement();
elem.Destination = root.SubPlotMap[includeStmt.SubPlot];
elem.Location = includeStmt.Location;
elem.ReturnDest = null;
kernel.RuntimeData.CallStack.Push(elem);
kernel.Next();
}
internal void Push(CallStackElement element)
{
callStack.Push(element);
}