Esempio n. 1
0
        protected virtual Expression DoResolveInitializer(ResolveContext rc)
        {
            if (in_transit)
            {
                field.Compiler.Report.Error(110, expr.Location,
                                            "The evaluation of the constant value for `{0}' involves a circular definition",
                                            GetSignatureForError());

                expr = null;
            }
            else
            {
                in_transit = true;
                expr       = expr.Resolve(rc);
            }

            in_transit = false;

            if (expr != null)
            {
                Constant c = expr as Constant;
                if (c != null)
                {
                    c = field.ConvertInitializer(rc, c);
                }

                if (c == null)
                {
                    if (TypeSpec.IsReferenceType(field.MemberType))
                    {
                        Error_ConstantCanBeInitializedWithNullOnly(rc, field.MemberType, expr.Location, GetSignatureForError());
                    }
                    else if (!(expr is Constant))
                    {
                        Error_ExpressionMustBeConstant(rc, expr.Location, GetSignatureForError());
                    }
                    else
                    {
                        expr.Error_ValueCannotBeConverted(rc, field.MemberType, false);
                    }
                }

                expr = c;
            }

            if (expr == null)
            {
                expr = New.Constantify(field.MemberType, Location);
                if (expr == null)
                {
                    expr = Constant.CreateConstantFromValue(field.MemberType, null, Location);
                }
                expr = expr.Resolve(rc);
            }

            return(expr);
        }