C# LocalTemporary.Release方法代碼示例

		static TypeSpec EmitCallInstance (EmitContext ec, Expression instance, TypeSpec declaringType, OpCode callOpcode)
		{
			var instance_type = instance.Type;

			//
			// Push the instance expression
			//
			if ((instance_type.IsStruct && (callOpcode == OpCodes.Callvirt || (callOpcode == OpCodes.Call && declaringType.IsStruct))) ||
				instance_type.IsGenericParameter || declaringType.IsNullableType) {
				//
				// If the expression implements IMemoryLocation, then
				// we can optimize and use AddressOf on the
				// return.
				//
				// If not we have to use some temporary storage for
				// it.
				var iml = instance as IMemoryLocation;
				if (iml != null) {
					iml.AddressOf (ec, AddressOp.Load);
				} else {
					LocalTemporary temp = new LocalTemporary (instance_type);
					instance.Emit (ec);
					temp.Store (ec);
					temp.AddressOf (ec, AddressOp.Load);
					temp.Release (ec);
				}

				return ReferenceContainer.MakeType (ec.Module, instance_type);
			}

			if (instance_type.IsEnum || instance_type.IsStruct) {
				instance.Emit (ec);
				ec.Emit (OpCodes.Box, instance_type);
				return ec.BuiltinTypes.Object;
			}

			instance.Emit (ec);
			return instance_type;
		}

		void DoEmitStringSwitch (LocalTemporary value, EmitContext ec)
		{
			Label l_initialized = ec.DefineLabel ();

			//
			// Skip initialization when value is null
			//
			value.EmitBranchable (ec, null_target, false);

			//
			// Check if string dictionary is initialized and initialize
			//
			switch_cache_field.EmitBranchable (ec, l_initialized, true);
			string_dictionary.EmitStatement (ec);
			ec.MarkLabel (l_initialized);

			LocalTemporary string_switch_variable = new LocalTemporary (TypeManager.int32_type);

			ResolveContext rc = new ResolveContext (ec.MemberContext);

			if (TypeManager.generic_ienumerable_type != null) {
				Arguments get_value_args = new Arguments (2);
				get_value_args.Add (new Argument (value));
				get_value_args.Add (new Argument (string_switch_variable, Argument.AType.Out));
				Expression get_item = new Invocation (new MemberAccess (switch_cache_field, "TryGetValue", loc), get_value_args).Resolve (rc);
				if (get_item == null)
					return;

				//
				// A value was not found, go to default case
				//
				get_item.EmitBranchable (ec, default_target, false);
			} else {
				Arguments get_value_args = new Arguments (1);
				get_value_args.Add (new Argument (value));

				Expression get_item = new ElementAccess (switch_cache_field, get_value_args, loc).Resolve (rc);
				if (get_item == null)
					return;

				LocalTemporary get_item_object = new LocalTemporary (TypeManager.object_type);
				get_item_object.EmitAssign (ec, get_item, true, false);
				ec.Emit (OpCodes.Brfalse, default_target);

				ExpressionStatement get_item_int = (ExpressionStatement) new SimpleAssign (string_switch_variable,
					new Cast (new TypeExpression (TypeManager.int32_type, loc), get_item_object, loc)).Resolve (rc);

				get_item_int.EmitStatement (ec);
				get_item_object.Release (ec);
			}

			TableSwitchEmit (ec, string_switch_variable);
			string_switch_variable.Release (ec);
		}

		//
		// source is ignored, because we already have a copy of it from the
		// LValue resolution and we have already constructed a pre-cached
		// version of the arguments (ea.set_arguments);
		//
		public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
		{
			prepared = prepare_for_load;
			Expression value = set_expr;

			if (prepared) {
				Invocation.EmitCall (ec, is_base_indexer, instance_expr, get,
					arguments, loc, true, false);

				prepared_value = new LocalTemporary (type);
				prepared_value.Store (ec);
				source.Emit (ec);
				prepared_value.Release (ec);

				if (leave_copy) {
					ec.ig.Emit (OpCodes.Dup);
					temp = new LocalTemporary (Type);
					temp.Store (ec);
				}
			} else if (leave_copy) {
				temp = new LocalTemporary (Type);
				source.Emit (ec);
				temp.Store (ec);
				value = temp;
			}
			
			if (!prepared)
				arguments.Add (new Argument (value));

			Invocation.EmitCall (ec, is_base_indexer, instance_expr, set, arguments, loc, false, prepared);
			
			if (temp != null) {
				temp.Emit (ec);
				temp.Release (ec);
			}
		}