Differences between RM 5.0 and 6.0

Differences between RM 5.0 and 6.0

[Mats Weber]

I have a paper copy of version 5.0 of the Ada 95 RM. Can I use it safely
or are there many changes from 5.0 to 6.0 (the standard) ?

Re: Differences between RM 5.0 and 6.0

[Tucker Taft]

Mats Weber (Mats.Weber@matrix.ch) wrote:

: I have a paper copy of version 5.0 of the Ada 95 RM. Can I use it safely
: or are there many changes from 5.0 to 6.0 (the standard) ?

The major changes from 5.0 to 6.0 were:

   1) Children of generics changed significantly -- "with"ing a child
      of a parent generic package makes a nested generic of the same name
      visible within any instance of the parent generic;

   2) The rules for static expressions were rewritten for clarity;
      the concept of "potentially static" was dropped;

   3) The accessibility rules were rewritten for clarity, using the
      hopefully more intuitive concept of accessibility "levels";

   4) Preinstantiations of the numeric text I/O packages were
      added for the predefined numeric types;

   5) Formal derived types may no longer have an explicit "known"
      discriminant_part; they may only have an unknown discriminant_part
      "(<>)" or inherit discriminants from the specified ancestor type;

   6) Incomplete types may be used as formal parameter types in the
      definition of the designated profile for an access-to-subprogram type
      (this allows a record to contain a pointer to a subprogram that
      takes that same record type as a parameter);

   7) Remote access types may now be declared in remote types packages
      (they used to only be allowed in remote call interface packages).

-Tucker Taft  stt@inmet.com

Re: Differences between RM 5.0 and 6.0

[Robert Dewar]

There are many small changes from 5.0 to 6.0, do yourself a favor
and get a copy of the latest changes (5.95 will do if you have that)

Re: Differences between RM 5.0 and 6.0

[Norman H. Cohen]

In article <Mats.Weber-2003952132250001@mlma11.matrix.ch>,
Mats.Weber@matrix.ch (Mats Weber) writes: 

|> I have a paper copy of version 5.0 of the Ada 95 RM. Can I use it safely

Only if you keep it away from an open flame.

|> or are there many changes from 5.0 to 6.0 (the standard) ?

But seriously, folks:  Changes include the treatment of children of
generics, the addition of predefined packages like Ada.Integer_Text_IO,
and changing Ada.Strings.Constants to Ada.Strings.Maps.Constants.  At
least the first two of these changes occurred after version 5.7.

Since you are already familiar with the general shape of Ada 95, I
presume you want to use the RM as a reference to look up details, so I
would definitely suggest getting the final version.

--
Norman H. Cohen    ncohen@watson.ibm.com