File : asis-data_decomposition-vcheck.adb
------------------------------------------------------------------------------
-- --
-- ASIS-for-GNAT IMPLEMENTATION COMPONENTS --
-- --
-- A S I S . D A T A _ D E C O M P O S I T I O N . V C H E C K --
-- --
-- B o d y --
-- --
-- Copyright (c) 1995-1999, Free Software Foundation, Inc. --
-- --
-- ASIS-for-GNAT is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 2, or (at your option) any later --
-- version. ASIS-for-GNAT is distributed in the hope that it will be use- --
-- ful, but WITHOUT ANY WARRANTY; without even the implied warranty of MER- --
-- CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General --
-- Public License for more details. You should have received a copy of the --
-- GNU General Public License distributed with ASIS-for-GNAT; see file --
-- COPYING. If not, write to the Free Software Foundation, 59 Temple Place --
-- - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- ASIS-for-GNAT was originally developed by the ASIS-for-GNAT team at the --
-- Software Engineering Laboratory of the Swiss Federal Institute of --
-- Technology (LGL-EPFL) in Lausanne, Switzerland, in cooperation with the --
-- Scientific Research Computer Center of Moscow State University (SRCC --
-- MSU), Russia, with funding partially provided by grants from the Swiss --
-- National Science Foundation and the Swiss Academy of Engineering --
-- Sciences. ASIS-for-GNAT is now maintained by Ada Core Technologies Inc --
-- (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- This package contains validity checks for abstractions declared in
-- Asis.Data_Decomposition (see 22.1, 22.3)
with Asis.Errors; use Asis.Errors;
with Asis.Exceptions; use Asis.Exceptions;
with A4G.Vcheck; use A4G.Vcheck;
with A4G.Contt; use A4G.Contt;
package body Asis.Data_Decomposition.Vcheck is
S_Record : constant String := "Record";
S_Array : constant String := "Array ";
-- Substrings needed to form the diagnosis in
-- Raise_ASIS_Inappropriate_Component
-----------------------
-- Local subprograms --
-----------------------
function Valid (Comp : Record_Component) return Boolean;
function Valid (Comp : Array_Component) return Boolean;
-- Checks if the argument component is valid, that is, it's enclosing
-- Context is still opened and it was not closed and then re-opened
-- after obtaining the given component
--------------------
-- Check_Validity --
--------------------
procedure Check_Validity
(Comp : in Record_Component;
Query : in String)
is
begin
if not Is_Nil (Comp) and then not Valid (Comp) then
Set_Error_Status
(Status => Value_Error,
Diagnosis => "Invalid Record Component value in " & Query);
raise ASIS_Inappropriate_Element;
end if;
end Check_Validity;
--------------------
-- Check_Validity --
--------------------
procedure Check_Validity
(Comp : in Array_Component;
Query : in String)
is
begin
if not Is_Nil (Comp) and then not Valid (Comp) then
Set_Error_Status
(Status => Value_Error,
Diagnosis => "Invalid Array Component value in " & Query);
raise ASIS_Inappropriate_Element;
end if;
end Check_Validity;
----------------------------------------
-- Raise_ASIS_Inappropriate_Component --
----------------------------------------
procedure Raise_ASIS_Inappropriate_Component
(Diagnosis : String;
Component_Kind : Component_Kinds)
is
Comp : String (S_Record'Range);
begin
if Component_Kind = Rec then
Comp := S_Record;
else
Comp := S_Array;
end if;
Set_Error_Status
(Status => Value_Error,
Diagnosis => "Inappropriate " & Comp & " Component in "
& Diagnosis);
raise ASIS_Inappropriate_Element;
end Raise_ASIS_Inappropriate_Component;
-----------
-- Valid --
-----------
function Valid (Comp : Record_Component) return Boolean is
begin
return Is_Opened (Comp.Parent_Context) and then
Later (Opened_At (Comp.Parent_Context), Comp.Obtained);
end Valid;
function Valid (Comp : Array_Component) return Boolean is
begin
return Is_Opened (Comp.Parent_Context) and then
Later (Opened_At (Comp.Parent_Context), Comp.Obtained);
end Valid;
end Asis.Data_Decomposition.Vcheck;