public LabelledExceptionHandler BeginHandler(ExceptionHandlerType type)
{
LabelledExceptionHandler prev = _Prev = _Handler;
if (prev != null)
{
EndHandler(prev);
}
IL.Emit(SRE.OpCodes.Leave, _SkipHandler = IL.DefineLabel());
Label handlerStart = IL.DefineLabel();
IL.MarkLabel(handlerStart);
LabelledExceptionHandler next = _Handler = new LabelledExceptionHandler {
TryStart = _Start,
TryEnd = handlerStart,
HandlerType = type,
HandlerEnd = _SkipHandler
};
if (type == ExceptionHandlerType.Filter)
{
next.FilterStart = handlerStart;
}
else
{
next.HandlerStart = handlerStart;
}
return(next);
}
public void EndHandler(ExceptionBlock block, LabelledExceptionHandler handler)
{
switch (handler.handlerType)
{
case ExceptionHandlerType.Filter:
Emit(OpCodes.Endfilter);
break;
case ExceptionHandlerType.Finally:
Emit(OpCodes.Endfinally);
break;
default:
Emit(OpCodes.Leave, block.skip);
break;
}
MarkLabel(block.skip);
pendingExceptionHandlers.Add(block.cur);
}
public void EndHandler(LabelledExceptionHandler handler)
{
Label skip = _SkipHandler;
switch (handler.HandlerType)
{
case ExceptionHandlerType.Filter:
IL.Emit(SRE.OpCodes.Endfilter);
break;
case ExceptionHandlerType.Finally:
IL.Emit(SRE.OpCodes.Endfinally);
break;
default:
IL.Emit(SRE.OpCodes.Leave, skip);
break;
}
IL.MarkLabel(skip);
IL._ExceptionHandlersToMark.Add(handler);
}
public override void BeginCatchBlock(Type exceptionType)
{
LabelledExceptionHandler handler = _ExceptionHandlers.Peek().BeginHandler(ExceptionHandlerType.Catch);
handler.ExceptionType = exceptionType == null ? null : _(exceptionType);
}
