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top - downloadIndex: ┃ T V ┃
Length: 40326 (0x9d86)
Types: TextFile
Names: »V«
└─⟦d10a02448⟧ Bits:30000409 8mm tape, Rational 1000, ENVIRONMENT, D_12_7_3
└─ ⟦fc9b38f02⟧ »DATA«
└─⟦9b46a407a⟧
└─⟦12c68c704⟧
└─⟦this⟧
└─⟦5f3412b64⟧ Bits:30000745 8mm tape, Rational 1000, ENVIRONMENT 12_6_5 TOOLS
└─ ⟦91c658230⟧ »DATA«
└─⟦458657fb6⟧
└─⟦220843204⟧
└─⟦this⟧
with Action;
with Calendar;
with Cmvc_Implementation_Errors;
with Directory;
with Io;
package Cmvc_Implementation is
pragma Subsystem (Tools);
pragma Module_Name (4, 3760);
-- CMVC is based on the notion of elements. An element is a logical
-- entity that encapsulates changes within objects over time. Any
-- object class that has a text representation and conversion functions
-- can be managed by CMVC. Elements have an internal name, supplied
-- when the element is created. This is the name used for all CMVC
-- operations. There is an external name associated with each version
-- set, which is used for all copy in and out operations.
-- Each version of an element is a snapshot of that element. It
-- represents a physical realization of that element at some point in
-- its history. A Gamma version has this property. Each successive
-- version is a new generation of the element.
-- A view is defined to mean a snapshot of a collection of elements; it
-- calls out specific versions of specific elements. This isn't
-- necessarily a physical representation. In other words, this isn't a
-- world but a more abstract concept.
-- A version set is a time ordered set of versions for one element.
-- There is a straight line of descent; each version was created from
-- its parent by changing the parent. There is no skipping; every
-- generation of the element is represented. Each version set for an
-- element represents a different time line, and each can be reserved
-- independently. Only one version in a version set can be checked
-- out, and this is the newest version. The version set is optionally
-- named, which is useful for iterating over the sets. The version set
-- also maintains the external name for this set of versions of the
-- element.
-- A configuration is a realization of a view. A configuration can have
-- a directory name, which means there is some representation on the
-- disk for it. There are two types of configurations, release
-- configurations and working configurations. A working configuration
-- is one in which versions can be changed. A release configuration
-- specifies a set of versions which are frozen; neither the release
-- configuration nor the versions specified can be changed.
-- Configurations are named by the user.
-- In many cases software must run on various targets. It is often the
-- case that most of the elements are the same, but a few may be
-- different to account for the differences in the targets. It is
-- desirable to capture this information in order to allow simultaneous
-- independent changes to the elements that are different, while
-- controlling access to the elements that are the same. Another
-- common scenario is the need to have two people work on one element
-- in parallel for some time, then merge the changes together. The
-- process of splitting elements and operating on them is called
-- maintaining varying lines of descent. These variants branch out from
-- some line, and may rejoin later. Branching out is done using create;
-- bringing two alternate lines together is done using merge. In CMVC,
-- alternate lines of descent is accomplished by using version sets and
-- configurations. Each version set is a line of descent for some
-- element. Each configuration selects at most one version set for an
-- element. Configurations that refer to the same version set are
-- linked; the element has one reservation across all such
-- configurations, and can only be changed serially. If the
-- configurations refer to different version sets for an element, the
-- element can be reserved independently.
-- There is a database for each set of related configurations. The
-- database must be provided to each operation discussed below.
No_Such_Generation : exception;
No_Such_Version_Set : exception;
No_Such_Element : exception;
Bogus_Parameters : exception;
Unknown_Error : exception;
-- The above are the only exceptions propagated out of this package.
-- Unknown_error is raised for internal errors and unexpected errors
-- propagated out of other packages. Bogus_Parameters is raised when
-- the parameters make no sense, such as when configurations from one
-- database are mixed with elements from another.
subtype Library_Name is String;
subtype History_File is String;
subtype Error_Status is Cmvc_Implementation_Errors.Status;
subtype Error_Msg is String;
function Is_Bad (Status : Error_Status) return Boolean
renames Cmvc_Implementation_Errors.Is_Bad;
function Error_Msg_Of (Status : Error_Status) return Error_Msg;
---------------------------------
-- Note: values of the following types can be reliably compared for
-- equality using "=" only if there is one database handle being used
-- in some job for one database. If this can't be guaranteed, the
-- name should be extracted and compared. If it is possible that
-- different databases are in use, then the database name should also be
-- extracted and compared.
-- There is a database for each set of related configurations.
type Database is private;
function Nil return Database;
function Is_Nil (Db : Database) return Boolean;
type Configuration is private;
function Nil return Configuration;
function Is_Nil (Config : Configuration) return Boolean;
type Element is private;
function Nil return Element;
function Is_Nil (Elem : Element) return Boolean;
type Element_Class is
record
Class : Directory.Class;
Subclass : Directory.Subclass;
end record;
type Version_Set is private;
function Nil return Version_Set;
function Is_Nil (Set : Version_Set) return Boolean;
subtype Generation is Natural;
function Nil return Generation;
function Last_Version return Generation;
-- Last_Version returns a value that stands in for whatever the newest
-- generation in the version set is. It is not the actual generation
-- of the newest version
package Database_Operations is
function Name_Of (Db : Database) return String;
procedure Open (Db_Name : String;
Action_Id : Action.Id;
Db : out Database;
Status : out Error_Status);
procedure Open (Db_Object : Directory.Object;
Action_Id : Action.Id;
Db : out Database;
Status : out Error_Status);
procedure Create (Db_Name : String;
Action_Id : Action.Id;
Db : out Database;
Status : out Error_Status;
Dont_Keep_Source : Boolean := False);
procedure Close (Db : Database;
Status : out Error_Status;
Prevent_Commit : Boolean := False);
-- If dont_keep_source is true, no source differentials are kept in
-- the database. This means versions cannot be retrieved from the
-- database, and that the merge command depends on external objects
-- versus internal information. It is set to true to save disk
-- space and to speed up check in.
procedure Expunge (Db : Database; Status : out Error_Status);
-- Removes all elements and version sets not referenced by a
-- configuration.
end Database_Operations;
package Configuration_Operations is
function Name_Of (Config : Configuration) return String;
function Database_Of (Config : Configuration) return Database;
subtype Configuration_Object is Directory.Object;
function Is_Configuration_Object
(Obj : Configuration_Object; Action_Id : Action.Id)
return Boolean;
procedure Open (Config_Name : String;
Config : out Configuration;
Status : out Error_Status;
Db : Database);
procedure Open (Obj : Configuration_Object;
Action_Id : Action.Id;
Db : in out Database;
Config : out Configuration;
Status : out Error_Status);
-- Return a handle to a configuration. The configuration must exist.
-- This handle is used for most interesting element operations.
procedure Create (Config_Name : String;
Config : out Configuration;
Status : out Error_Status;
Golden_Config : Configuration := Nil;
Default_Library : String := "";
Version_Set_Name : String := "";
Initial : Configuration := Nil;
Make_Copies : Boolean := False;
Is_Release : Boolean := False;
Db : Database);
-- Create a new configuration. It can optionally be initialized.
-- If make_copies is true, new version_sets are made in each of the
-- elements selected by the initial configuration, which are then
-- initialized with the version selected by the initial
-- configuration. These version sets are given the name provided.
-- If no name is provided, the version sets are given the
-- configuration name.
-- If make_copies is false, the new configuration
-- references all the same version sets and versions as the initial
-- configuration, and the version_set_name parameter is ignored. In
-- other words, it is linked. If is_release is true, the new
-- configuration is frozen (is a release).
-- Golden_Config is the name of a configuration that is to be
-- copied into automatically whenever an element is checked in.
-- The intent is to allow the user to keep a current copy of
-- everything. This package doesn't actually do the copying, but
-- makes available the information to the command packages.
-- Default_Library is the name of the library to be used by default
-- for this configuration. It is used in all commands that require
-- a library, but are given the null string.
function Golden_Config_Of (Config : Configuration) return Configuration;
function Default_Library_Of (Config : Configuration) return String;
procedure Create_Config_Object (Name : String;
Config : Configuration;
Status : out Error_Status);
-- Create a configuration object with name 'name'. This object can be
-- used to get a configuration handle. If a configuration object
-- editor is ever provided, it would accept one of these.
procedure Delete (Config : Configuration;
Status : out Error_Status;
Delete_Release : Boolean := False);
-- Delete a configuration. The elements and version sets are not
-- deleted. Delete_release must be true to delete a release
-- configuration.
function Is_Release (Config : Configuration) return Boolean;
-- Returns true if the argument is a release configuration.
end Configuration_Operations;
package Element_Operations is
function Name_Of (Elem : Element) return String;
procedure Open (Element_Name : String;
Elem : out Element;
Status : out Error_Status;
Db : Database);
-- Gets a handle for an element. This handle is used to look at the
-- various version sets for the element.
procedure Create (Element_Name : String;
Config : Configuration;
Class : Element_Class;
External_Name : String;
Elem : out Element;
Status : out Error_Status;
Initial_Value_Set : Version_Set := Nil;
Initial_Value : Generation := Nil;
Version_Set_Name : String := "";
Dont_Keep_Source : Boolean := False);
procedure Create (Element_Name : String;
Db : Database;
Class : Element_Class;
External_Name : String;
Version_Set_Name : String;
Elem : out Element;
Status : out Error_Status;
Initial_Value_Set : Version_Set := Nil;
Initial_Value : Generation := Nil;
Dont_Keep_Source : Boolean := False);
procedure Create (Element_Name : String;
Config : Configuration;
Class : Element_Class;
External_Name : String;
Elem : out Element;
Status : out Error_Status;
Initial_Value_Object :
Directory.Object := Directory.Nil;
Version_Set_Name : String := "";
Dont_Keep_Source : Boolean := False);
procedure Create
(Element_Name : String;
Db : Database;
Class : Element_Class;
External_Name : String;
Version_Set_Name : String;
Elem : out Element;
Status : out Error_Status;
Initial_Value_Object : Directory.Object := Directory.Nil;
Dont_Keep_Source : Boolean := False);
-- Create a new element. The new element can be inserted into a
-- configuration (using the first procedure). An empty version set is
-- created for the element. In the case that a configuration is
-- supplied, the version set name defaults to the configuration name.
-- In the database case, the version set name must be supplied. The
-- version set is optionally initialized by copying the contents of a
-- version into it (as generation 1). The configuration must be a
-- working configuration. Path_from_library specifies a string that is
-- to be prepended to the element name and appended to the library name
-- when the element is copied out of the database. Initial_value_object
-- is the name of some directory object that is to be used as an
-- initial value.
procedure Delete (Elem : Element;
Config : Configuration;
Status : out Error_Status);
-- Delete the element from the configuration. The element is not
-- deleted from the database. The configuration must be a working
-- configuration.
procedure Delete (Elem : Element; Status : out Error_Status);
-- Delete the element from all working configurations in the database.
-- This operation ignores release configurations.
procedure Add (Elem : Element;
Status : out Error_Status;
Config : Configuration);
-- This operation adds an element (and a version set) to a working
-- configuration. There must be only one version set associated with
-- the element to use this operation.
function Is_In_Configuration
(Elem : Element; Config : Configuration) return Boolean;
-- Returns true if some version set of the element is referenced by the
-- configuration
function Class_Of (Elem : Element) return Element_Class;
-- return the class data for an element
function Saves_Source (Elem : Element) return Boolean;
-- Is source saved for this element?
end Element_Operations;
---------------------------------
package Version_Set_Operations is
function Name_Of (Set : Version_Set) return String;
procedure Open (Set_Name : String;
Elem : Element;
Set : out Version_Set;
Status : out Error_Status);
-- Get a handle on a version set. This handle is used to traverse
-- across the versions contained in the set.
procedure Open (Elem : Element;
Set : out Version_Set;
Status : out Error_Status;
Config : Configuration);
-- Get a handle on a version set determined by an element/configuration
-- pair.
procedure Create (Set_Name : String;
Elem : Element;
External_Name : String;
Set : out Version_Set;
Status : out Error_Status;
Initial_Value_Set : Version_Set := Nil;
Initial_Value : Generation := Nil);
procedure Create
(Set_Name : String;
Elem : Element;
External_Name : String;
Set : out Version_Set;
Status : out Error_Status;
Initial_Value_Object : Directory.Object := Directory.Nil);
-- Create a new version set in some element. The new version set can
-- be initialized.
procedure Add (Set : Version_Set;
Config : Configuration;
Status : out Error_Status;
Gen : Generation := Last_Version;
Replace_Ok : Boolean := True);
-- Add (or replace) a version set to a configuration. This operation
-- implies the adding of an element as well, as a version set is
-- contained within an element. The configuration must be a working
-- one. The configuration is set to refer to the specified version
procedure Prune (Set : Version_Set;
Up_To_Generation : Generation;
Status : out Error_Status);
-- Throw away the first up to the up_to_generation versions from the
-- version set. This operation fails if any configuration references a
-- version to be discarded. An iterator exists to help find these
-- blocking configuration(s).
procedure Change_External_Name (Set : Version_Set;
External_Name : String;
Status : out Error_Status);
-- Modify the name used for the version set. This name is appended to the
-- library name to build a complete external name.
-- Note that this affects all configurations using the version set.
function External_Name_Of (Set : Version_Set) return String;
-- Return the path specified when the version set was made.
function Element_Of (Set : Version_Set) return Element;
end Version_Set_Operations;
---------------------------------
package Generation_Operations is
function Generation_Of
(Elem : Element; Config : Configuration) return Generation;
function Generation_Of (Set : Version_Set; Config : Configuration)
return Generation;
-- Get the generation selected by a configuration.
function First_Generation_Of (Set : Version_Set) return Generation;
-- Return the generation of the first version for the set. This is
-- something other than one after a prune_version_set
function Last_Generation_Of (Set : Version_Set) return Generation;
end Generation_Operations;
package Reservation_Operations is
procedure Create_From_Db (Set : Version_Set;
Where : String;
Status : out Error_Status;
Gen : Generation := Last_Version);
procedure Create_From_Db (Set : Version_Set;
Where : Directory.Object;
Status : out Error_Status;
Gen : Generation := Last_Version);
-- Only works for objects of class 'file'
procedure Create_From_Db (Set : Version_Set;
To_File : in out Io.File_Type;
Status : out Error_Status;
Gen : Generation := Last_Version);
generic
with procedure Put_Line (Text : String);
procedure Create_From_Db_Generic (Set : Version_Set;
Status : out Error_Status;
Gen : Generation := Last_Version);
procedure Check_Out (Set : Version_Set;
Gen : out Generation;
Status : out Error_Status;
Config : Configuration;
User : String := "");
procedure Check_In (Set : Version_Set;
Current_Source : Directory.Object;
Gen : out Generation;
Status : out Error_Status;
Config : Configuration;
User : String := "");
-- Check out (or in) some element. Since the element is specified
-- by the version set, the element need not be provided. Check out
-- creates a new version. The configuration is changed to reflect
-- the use of the new version. Check in verifies the same
-- configuration is being used. The command package can check to see
-- if the user doing the check in is the same one that did the
-- check out.
-- Check out returns the generation for the new copy. The
-- generation can be used to locate a copy of the element on the
-- disk somewhere by using the last_known_object history item. The
-- application must copy this object to the destination. If the
-- last_known_object is Nil, the application should request a copy
-- to built out of the database, supplying the destination
-- location.
-- Check in wants the directory.object of the item being checked
-- in. It uses this to compute the differentials, and also saves it
-- in the database (for passing to the next check out). It returns
-- the generation for any later processing that might be needed
-- (like compiling or accepting).
-- The command package check in might also want to check for the
-- existence of a golden configuration, and copy the object there.
-- The resulting object would be given to check in. If a golden
-- configuration is desired, the returned generation should be
-- accepted into that golden configuration to bring that
-- configuration up to date. Remember to do all of the work
-- required before check in under one action, so the operations can
-- be backed out if the check in fails. The most common failure is
-- 'wrong configuration', so the command package might want to
-- check that itself first.
-- The user string is used to mark who did the operation. If "" is
-- supplied, the login name is used.
procedure Abandon_Reservation (Set : Version_Set;
Revert_To_Gen : Generation;
Status : out Error_Status;
Config : Configuration);
-- Abandon a previous check out operation. The checked out version
-- is thrown away. It is the command package's responsibility to
-- ensure that the version being reverted to is copied into the
-- appropriate place. The configuration is changed to refer to the
-- specified generation. Giving 'last_version' as the generation
-- will revert to the generation before the check out (as it is the
-- last after the revert).
procedure Accept_Changes (Set : Version_Set;
Result : out Generation;
Status : out Error_Status;
Gen : Generation := Last_Version;
Config : Configuration);
-- The configuration is changed to refer to the requested version.
-- The actual generation selected is returned. If the last version
-- is checked out, the last - 1 version is returned. The
-- configuration is changed to refer to the returned generation.
-- This operation can be reversed by accepting some other version.
-- It is the command package's responsibility to actually copy the
-- data.
end Reservation_Operations;
package Merge_Operations is
procedure Merge_Changes (Elem : Element;
From_Config : Configuration;
Conflicts_Detected : out Boolean;
Gen : out Generation;
Status : out Error_Status;
To_Config : Configuration;
List_File : String := "";
Join_Configs : Boolean := True;
User : String := "");
-- The versions in the two version sets selected by elem are merged
-- together, with the result being left in the to_config. This
-- operation always creates a new version. The to_config is marked
-- to refer to the new version. An error occurs if join_configs is true
-- and from_config doesn't refer to the last version in its version
-- set, or if to_config doesn't refer to the last version in its set.
-- This command requires that the two version sets be related,
-- which means that one of the sets must have been created from the
-- other. If the split point cannot be located, or never existed,
-- the merge fails.
-- If conflicting changes are found, the out parameter
-- conflicts_detected is set to true. This by itself is not an error
-- List_file specifies a text file where the merged result can be
-- placed. The merge points in the file are marked in the same
-- fashion as file_utilities.merge.
-- Effort_only will do the merge without actually updating the
-- database.
-- Join_configs, if true, will change from_config to refer to the
-- same version set as to_config. In other words, the two
-- configurations are relinked.
end Merge_Operations;
type Basic_History is
record
Ever_Checked_Out : Boolean;
When_Checked_Out : Calendar.Time;
Checked_Out_To_Config : Configuration;
Ever_Checked_In : Boolean;
When_Checked_In : Calendar.Time;
Expected_Check_In : Calendar.Time;
Edit_Time_Stamp : Calendar.Time;
Last_Known_Object : Directory.Object;
Split_From_Set : Version_Set;
Split_From_Version : Generation;
Merged_From_Set : Version_Set;
Merged_From_Version : Generation;
end record;
-- Split refers to the source version when the set was created. merged
-- refers to a version that was merged into this one.
-- Checked_out_to_config is nil if the config has been deleted.
package History_Operations is
procedure Get (Set : Version_Set;
History : out Basic_History;
Status : out Error_Status;
Gen : Generation := Last_Version);
-- Return the history for some generation in the set.
function Who_Checked_Out
(Set : Version_Set; Gen : Generation := Last_Version)
return String;
function Who_Checked_In
(Set : Version_Set; Gen : Generation := Last_Version)
return String;
-- Return the string history items
procedure Set_Expected_Check_In (Set : Version_Set;
To_Time : Calendar.Time;
Status : out Error_Status);
-- Change the expected check in time for the last generation of the set.
-- It must be checked out.
procedure Set_Last_Known_Object (Set : Version_Set;
To_Object : Directory.Object;
Status : out Error_Status;
Gen : Generation := Last_Version);
-- Set the last known object entry in the basic history for the specified
-- generation. It need not be checked out.
function Is_Checked_Out (Set : Version_Set) return Boolean;
-- simple way to see if a version is currently checked out
package What_Changed is
-- Compute the difference between two adjacent versions in a
-- version set. Make the text available for reporting.
type Region_Iterator is private;
type Region_Record is
record
Newer_Start_Line : Natural;
Newer_Stop_Line : Natural;
Older_Start_Line : Natural;
Older_Stop_Line : Natural;
end record;
-- The Newer_Start_Line and Newer_Stop_Line are line numbers of
-- the full text of the newer generation, and do not take into
-- account insertions, deletions, or replacements from the
-- older generation. These line numbers are always
-- the correct numbers to give to the text extraction
-- function below. Line numbers 1..Last_Newer_Line(iter) will
-- span the entire text of the newer generation.
-- Older_Start_Line and Older_Stop_Line are line numbers
-- within regions of difference and are not necessarily
-- actual line numbers within the older generation, but can
-- be used by the text extraction function to get the
-- text of the older generation within the difference regions.
-- The entirety of the older generation cannot be printed
-- by this package.
-- If newer_start > newer_stop, text from older_start to
-- older_stop has been deleted from between newer_stop
-- and newer_start.
-- If newer_start <= newer_stop and
-- If older_start > older_stop, text between newer_start
-- and newer_stop has been inserted.
-- or If older_start <= older_stop text is being replaced
-- Line numbers not mentioned in a region are common between the
-- two generations.
procedure Initialize (In_Set : Version_Set;
Result : out Region_Iterator;
Status : out Error_Status;
Generation_Pair : Generation := Last_Version);
-- Compute an iterator for differences between generation and
-- generation - 1.
function Done (Iter : Region_Iterator) return Boolean;
function Value (Iter : Region_Iterator) return Region_Record;
procedure Next (Iter : in out Region_Iterator);
function Last_Newer_Line (Iter : Region_Iterator) return Natural;
function Text_Of_Newer
(Iter : Region_Iterator; Line_Number : Natural)
return String;
function Text_Of_Older
(Iter : Region_Iterator; Line_Number : Natural)
return String;
private
type Region_Iterator_Record;
type Region_Iterator is access Region_Iterator_Record;
pragma Segmented_Heap (Region_Iterator);
end What_Changed;
procedure Set (From_File : in out Io.File_Type;
Set : Version_Set;
Status : out Error_Status);
-- Copy the text file to the history database, and
-- associate it with the last version in the version set. The version
-- must be checked out and not checked in.
procedure Append (From_File : in out Io.File_Type;
Set : Version_Set;
Status : out Error_Status);
-- Same as above, only the file is appended instead of replacing.
procedure Get (To_File : in out Io.File_Type;
Set : Version_Set;
Status : out Error_Status;
Gen : Generation := Last_Version);
-- Copy the history file from the database into a text file
procedure Set (From_String : String;
Set : Version_Set;
Status : out Error_Status);
-- Copy the string to the history database, and
-- associate it with the last version in the version set. The version
-- must be checked out and not checked in. Lines must be separated
-- by Ascii.Lf
procedure Append (From_String : String;
Set : Version_Set;
Status : out Error_Status);
-- Same as above, only the string is appended instead of replacing.
function Get (Set : Version_Set; Gen : Generation := Last_Version)
return String;
-- Return the history info from the database as a string. Lines
-- are separated by Ascii.Lf
end History_Operations;
package Iterator_Operations is
type Configuration_Iterator is private;
procedure Initialize (Db : Database; Iter : out Configuration_Iterator);
procedure Initialize (Elem : Element;
Iter : out Configuration_Iterator);
procedure Initialize (Set : Version_Set;
Iter : out Configuration_Iterator);
procedure Initialize (Set : Version_Set;
Up_To_Version : Generation;
Iter : out Configuration_Iterator);
procedure Next (Iter : in out Configuration_Iterator);
function Done (Iter : Configuration_Iterator) return Boolean;
function Value (Iter : Configuration_Iterator) return Configuration;
-- Iterate over configurations. The iterator can be built to iterate
-- over all configurations, all configurations that reference some
-- element, all configurations that reference some version set, or
-- all configurations that reference the first up to n'th version of
-- a version set.
type Element_Iterator is private;
procedure Initialize (Config : Configuration;
Iter : out Element_Iterator);
procedure Initialize (Db : Database; Iter : out Element_Iterator);
procedure Next (Iter : in out Element_Iterator);
function Done (Iter : Element_Iterator) return Boolean;
function Value (Iter : Element_Iterator) return Element;
-- Iterate over elements. The options are to iterate over all elements
-- in the database, or to iterate over all elements in a configuration.
type Version_Set_Iterator is private;
procedure Initialize (Db : Database; Iter : out Version_Set_Iterator);
procedure Initialize (Config : Configuration;
Iter : out Version_Set_Iterator);
procedure Initialize (Elem : Element; Iter : out Version_Set_Iterator);
procedure Next (Iter : in out Version_Set_Iterator);
function Done (Iter : Version_Set_Iterator) return Boolean;
function Value (Iter : Version_Set_Iterator) return Version_Set;
-- Iterate over the version sets specified by a configuration, over
-- the version sets associated with an element, or over all version
-- sets in the database. Iterating over version sets is useful for
-- finding an external name and matching it against the name of
-- some object, in order to find an element name. This would be
-- done by stripping off the library and then comparing what is
-- left to the external names for the version sets.
private
type Ci_Limit_Enumeration is (All_Configs, Elem_Limit, Set_Limit);
type Ci_Record (What_Sort : Ci_Limit_Enumeration);
type Configuration_Iterator is access Ci_Record;
pragma Segmented_Heap (Configuration_Iterator);
type Ei_Limit_Enumeration is (All_Elements, Config_Limit);
type Ei_Record (What_Sort : Ei_Limit_Enumeration);
type Element_Iterator is access Ei_Record;
pragma Segmented_Heap (Element_Iterator);
type Vsi_Limit_Enumeration is (All_Sets, Config_Limit, Elem_Limit);
type Vsi_Record (What_Sort : Vsi_Limit_Enumeration);
type Version_Set_Iterator is access Vsi_Record;
pragma Segmented_Heap (Version_Set_Iterator);
end Iterator_Operations;
private
type Database_Record;
type Database is access Database_Record;
pragma Segmented_Heap (Database);
type Configuration_Record;
type Configuration is access Configuration_Record;
pragma Segmented_Heap (Configuration);
type Element_Record;
type Element is access Element_Record;
pragma Segmented_Heap (Element);
type Vs_Record;
type Version_Set is access Vs_Record;
pragma Segmented_Heap (Version_Set);
end Cmvc_Implementation;