/// <summary>
/// Constructor.
/// </summary>
/// <param name="interpreter">An IInterpreter instance.</param>
/// <param name="parentWord">A word, that is executing this CATCH word.</param>
/// <param name="nextWordIndex">An index of a word following this CATCH word..</param>
public CatchWord(IInterpreter interpreter, IWord parentWord, int nextWordIndex)
: base(interpreter)
{
Name = "CATCH";
IsControlWord = true;
Action = () =>
{
// Exception stack free.
if ((interpreter.State.ExceptionStack.Count + 1) >= Interpreter.State.ExceptionStack.Items.Length)
{
throw new InterpreterException(-3, "Exception stack overflow.");
}
Interpreter.StackExpect(1);
var exceptionFrame = new ExceptionFrame()
{
StackTop = Interpreter.State.Stack.Top,
ObjectStackTop = Interpreter.State.ObjectStack.Top,
ReturnStackTop = Interpreter.State.ReturnStack.Top,
InputSourceStackTop = Interpreter.State.InputSourceStack.Top,
ExecutingWord = _parentWord,
NextWordIndex = _nextWordIndex
};
Interpreter.State.ExceptionStack.Push(exceptionFrame);
try
{
// Execute the word.
var index = Interpreter.Execute(Interpreter.State.WordsList.Get(Interpreter.Pop()));
// Remove the unused exception frame (nothing failed here).
Interpreter.State.ExceptionStack.Pop();
// Return the OK status.
Interpreter.Push(0);
return(index);
}
catch (System.Exception)
{
// Clean up the mess, if needed.
if (Interpreter.State.ExceptionStack.IsEmpty == false && Interpreter.State.ExceptionStack.Peek() == exceptionFrame)
{
Interpreter.State.ExceptionStack.Pop();
}
// TODO: What to do with the exception?
// Go to the word behind us.
return(1);
}
};
_parentWord = parentWord;
_nextWordIndex = nextWordIndex;
}
public void Constructor_Preserves_Function_Names()
{
var stackTrace = new StackTrace(TestHelper.GetException());
var stackFrame = stackTrace.GetFrames().Last();
var frame = new ExceptionFrame(stackFrame);
Assert.AreEqual(frame.Function, "GetException");
Assert.AreEqual(frame.Module, "SharpRaven.UnitTests.Utilities.TestHelper");
}
public void Constructor_NullFrameMethod_DoesNotThrow()
{
// on some platforms (e.g. on mono), StackFrame.GetMethod() may return null
// e.g. for this stack frame:
// at (wrapper dynamic-method) System.Object:lambda_method (System.Runtime.CompilerServices.Closure,object,object))
var stackFrame = new StackFrameWithNullMethod();
var frame = new ExceptionFrame(stackFrame);
Assert.AreEqual("(unknown)", frame.Module);
Assert.AreEqual("(unknown)", frame.Function);
Assert.AreEqual("(unknown)", frame.Source);
}
public void PreTest ()
{
frame = SyncFrame.GUI.CountFrame ();
object ApplicationException::meta
}