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); }