C# EmitContext.BeginCatchBlock方法代碼示例

		protected override void DoEmit (EmitContext ec)
		{
			if (IsGeneral)
				ec.BeginCatchBlock (TypeManager.object_type);
			else
				ec.BeginCatchBlock (CatchType);

			if (li != null) {
				li.CreateBuilder (ec);

				//
				// Special case hoisted catch variable, we have to use a temporary variable
				// to pass via anonymous storey initialization with the value still on top
				// of the stack
				//
				if (li.HoistedVariant != null) {
					LocalTemporary lt = new LocalTemporary (li.Type);
					SymbolWriter.OpenCompilerGeneratedBlock (ec);
					lt.Store (ec);
					SymbolWriter.CloseCompilerGeneratedBlock (ec);

					// switch to assigning from the temporary variable and not from top of the stack
					assign.UpdateSource (lt);
				}
			} else {
				SymbolWriter.OpenCompilerGeneratedBlock (ec);
				ec.Emit (OpCodes.Pop);
				SymbolWriter.CloseCompilerGeneratedBlock (ec);
			}

			Block.Emit (ec);
		}

		protected override void DoEmit (EmitContext ec)
		{
			if (CatchType != null)
				ec.BeginCatchBlock (CatchType);
			else
				ec.BeginCatchBlock (TypeManager.object_type);

			if (VarBlock != null)
				VarBlock.Emit (ec);

			if (Name != null) {
				// TODO: Move to resolve
				LocalVariableReference lvr = new LocalVariableReference (Block, Name, loc);
				lvr.Resolve (new ResolveContext (ec.MemberContext));
				
				// Only to make verifier happy
				if (TypeManager.IsGenericParameter (lvr.Type))
					ec.Emit (OpCodes.Unbox_Any, lvr.Type);

				Expression source;
				if (lvr.IsHoisted) {
					LocalTemporary lt = new LocalTemporary (lvr.Type);
					lt.Store (ec);
					source = lt;
				} else {
					// Variable is at the top of the stack
					source = EmptyExpression.Null;
				}

				lvr.EmitAssign (ec, source, false, false);
			} else
				ec.Emit (OpCodes.Pop);

			Block.Emit (ec);
		}