!standard 3.9.4 06-04-20 SI99-0011-1/01 !standard 15.7 !standard 15.13 !class binding interpretation 06-04-20 !status work item 06-04-20 !status received 06-02-13 !priority High !difficulty Easy !qualifier Omission !subject Add A_Tagged_Incomplete_Type_Declaration to Declaration_Kinds !summary Add support for the new tagged incomplete view. !question The Amendment (Ada 2005) defines a tagged incomplete view to incomplete type declarations, should these be accessible as a valid Declaration_Kinds? (Yes) !recommendation (See summary.) !wording * Extend existing element classification: - Add a new value to Declaration_Kinds after A_Component_Declaration, ASIS section 3.9.4 A_Tagged_Incomplete_Type_Declaration, -- 3.10.1(2) * Add A_Tagged_Incomplete_Type_Declaration to the end of the lists of Appropriate kinds for: Asis.Declarations.Corresponding_Type_Declaration -- ASIS 15.13 Asis.Declarations.Discriminant_Part -- ASIS 15.7 !discussion Recommended by Sergey I. Rybin on 06-02-13, see "!appendix" section. !appendix Subject: Summary of the proposals for updating the ASIS Standard for Ada 2005 From: Sergey I. Rybin Date: Mon, 13 Feb 2006 13:55:06 +0300 Formally the ASIS revision process is supposed to be started only after finishing all the technical work with the new revision of the Ada Standard, but I think we can start some preliminary technical work with new ASIS definition already now (all the changes in Ada definition are stable enough to start the ASIS revision). At AdaCore we have developed a draft version of the new ASIS specification and most of the proposed changes are already implemented in the latest version of GNAT/ASIS technology. The attached file contains the summary of the changes in the ASIS Standard we have made to adopt the new Ada features. The interesting thing I've realized when working on our draft of the new ASIS specification is that if we would like to keep the upward compatibility as much as possible and if we would like to keep changes as small as possible, the new Ada definition gives us very limited freedom in making changes in the ASIS spec. It does not mean that we think that our proposals are the only possible solution for ASIS 2005, but it gives us some hope that we can do ASIS revision for Ada 2005 fast enough. There is quite a natural mapping of the proposed changes in the ASIS specification onto the existing set of Ada Issues used for Ada revision, and the attached file is structured and ordered by AIs. The only exception is the new values in the ASIS Element Classification needed to represent the new Ada 2005 predefined attributes and pragmas (of course, this could be also mapped onto AIs, but I do not think that it would make sense, because this is the easiest and completely straightforward part of the ASIS revision). My main goal of sending this ASIS 2005 Draft summary is to start the ASIS 2005 discussion. The document itself would hardly be a convenient background for this discussion - we will have at least split it on changes related to different language issues, we will also have to find a way for documenting the revision discussion, probably we may need a separate mailing list for it. But let's get started! Sergey Rybin ..... ------------------------------------ -- AI-326 Tagged incomplete types -- ------------------------------------ RM-06 3.10.1 * Extend existing element classification: - Add a new value to Declaration_Kinds: A_Tagged_Incomplete_Type_Declaration * Add A_Tagged_Incomplete_Type_Declaration to the lists of Appropriate kinds of Asis.Declarations.Corresponding_Type_Declaration and Asis.Declarations.Discriminant_Part ****************************************************************