Mono.CSharp.GotoCase.Resolve C# (CSharp) Method

		public override bool Resolve (BlockContext ec)
		{
			if (ec.Switch == null){
				ec.Report.Error (153, loc, "A goto case is only valid inside a switch statement");
				return false;
			}

			ec.CurrentBranching.CurrentUsageVector.Goto ();

			expr = expr.Resolve (ec);
			if (expr == null)
				return false;

			Constant c = expr as Constant;
			if (c == null) {
				ec.Report.Error (150, expr.Location, "A constant value is expected");
				return false;
			}

			TypeSpec type = ec.Switch.SwitchType;
			Constant res = c.TryReduce (ec, type, c.Location);
			if (res == null) {
				c.Error_ValueCannotBeConverted (ec, loc, type, true);
				return false;
			}

			if (!Convert.ImplicitStandardConversionExists (c, type))
				ec.Report.Warning (469, 2, loc,
					"The `goto case' value is not implicitly convertible to type `{0}'",
					TypeManager.CSharpName (type));

			object val = res.GetValue ();
			if (val == null)
				val = SwitchLabel.NullStringCase;
					
			if (!ec.Switch.Elements.TryGetValue (val, out sl)) {
				FlowBranchingBlock.Error_UnknownLabel (loc, "case " + 
					(c.GetValue () == null ? "null" : val.ToString ()), ec.Report);
				return false;
			}

			return true;
		}