Exemplo n.º 1
0
 public override void Visit(TryStatement node)
 {
   VisitNode(node.Statement);
   VisitNode(node.Catch);
   VisitNode(node.Finally);
   Visit((Statement)node);
 }
Exemplo n.º 2
0
      public override void Visit(TryStatement node)
      {
        ///we may have an exception anywhere in the try block
        ///so stack may be at its max when entering the catch block
        ///one option is to clear up the stack before starting (we chose this one)
        ///the other optios is to make sure there is enough room on the stack

        PushLocation(node);

        _ilGen.BeginExceptionBlock();
        _labelInfos.PushProtectedRegion(node);
        VisitNode(node.Statement);
        _labelInfos.PopProtectedRegion(node);
        VisitNode(node.Catch);
        VisitNode(node.Finally);
        _ilGen.EndExceptionBlock();

        PopLocation();
      }
Exemplo n.º 3
0
 public override void Visit(TryStatement node) { Visit((Statement)node); }
Exemplo n.º 4
0
      public override void Visit(TryStatement node)
      {
        ///In case we ever use a StackPointer variable that is changed at runtime, we have to consider the following:
        ///we may have an exception anywhere in the try block
        ///so stack may be at its max when entering the catch block
        ///one option is to clear up the stack before starting (we chose this one)
        ///the other optios is to make sure there is enough room on the stack

        PushLocation(node);

        var tryICIndex = ReserveNewICIndex();

        var tryBeginIndex = GetCurrentICIndex() + 1;
        VisitNode(node.Statement);
        var tryEndIndex = GetCurrentICIndex();

        var exceptionVariableIndex = -1;
        var catchBeginIndex = int.MaxValue;
        var catchEndIndex = int.MinValue;
        if (node.Catch != null)
        {
          var symbol = node.Catch.Identifier.Symbol;
          Debug.Assert(symbol != null, new JSSourceLocation(_currFuncMetadata, node.Catch), string.Format("Cannot find symbol for identifier {0} in catch clause", node.Catch.Identifier));

          var originalSymbolType = symbol.SymbolType;
          symbol.SymbolType = JSSymbol.SymbolTypes.Local; //This symbols is defined only in the catch scope.

          exceptionVariableIndex = GetIndex(symbol);

          catchBeginIndex = GetCurrentICIndex() + 1;
          VisitNode(node.Catch);
          catchEndIndex = GetCurrentICIndex();

          symbol.SymbolType = originalSymbolType;
        }

        var finallyBeginIndex = int.MaxValue;
        var finallyEndIndex = int.MinValue;
        if (node.Finally != null)
        {
          finallyBeginIndex = GetCurrentICIndex() + 1;
          VisitNode(node.Finally);
          finallyEndIndex = GetCurrentICIndex();
        }

        BeginICMethod(node);
        _ilGen.Ldarg_CallFrame();
        _ilGen.Ldc_I4(tryBeginIndex);
        _ilGen.Ldc_I4(tryEndIndex);
        _ilGen.Ldc_I4(catchBeginIndex);
        _ilGen.Ldc_I4(catchEndIndex);
        _ilGen.Ldc_I4(finallyBeginIndex);
        _ilGen.Ldc_I4(finallyEndIndex);
        _ilGen.Ldc_I4(exceptionVariableIndex);
        _ilGen.Call(Types.Operations.ICMethods.TryCatchFinally);
        EndICMethod(tryICIndex, GetCurrentICIndex() + 1);

        PopLocation();
      }
Exemplo n.º 5
0
 public override void Visit(TryStatement node)
 {
     Visit((Statement)node);
 }
Exemplo n.º 6
0
 public abstract void Visit(TryStatement node);
Exemplo n.º 7
0
 public override void Visit(TryStatement node)
 {
   throw new NotImplementedException();
 }