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From: fintan@vax.sbu.ac.uk
Newsgroups: comp.lang.ada
Subject: type is access cf type is access all?
Message-ID: <1995Jan20.114005.8916@vax.sbu.ac.uk>
Date: 20 Jan 95 11:40:05 GMT
Organization: South Bank University
Date: 1995-01-20T11:40:05+00:00
List-Id: <comp.lang.ada>

trying to get my head around this one and failing!
(Maybe I need a new head?) 

What is the difference between:

   type FooPointers is access Foo;

and

   type FooPointers is access all Foo;

The 9X LRM states 

"if no general_access_modifier {all | constant} appears 
... the access type is a pool-specific access-to_variable 
type"

My reading of this implies that omitting all will result
in variables the access type only being able to designate 
dynamically (new) allocated anonymous variables and not 
non-pool (aliased) variables.

A check of this idea on gnat 2.0 suggests that both types
can designate dynamic and aliased variables.

Anyone know the answer? 

replies by post to me and I will summarise.

fintan

-----------------------------------------------------------

Fintan Culwin PhD
Senior Lecturer Software Engineering
School of Computing
South Bank University
Borough Road
London SE1 0AA

Phone (+44) (0)171 815 7434
Fax   (+44) (0)171 815 7499

fintan@vax.sbu.ac.uk