Object-oriented Software in Ada 95

xvi
Actual
parameter
Preface
The physical object passed to a function, procedure, entry or generic unit. For
example, in the following statement the actual parameter to the procedure Put
is Number.
Print( Number );
Ada 83
The version of the language that conforms to ANSI/MIL-STD 1815A
ISO/IEC 8652:1983, 1983. Ada 83 is superseded by Ada 95. The language is
named after Ada Augusta the Countess of Lovelace, daughter of the poet
Lord Byron and Babbage's ‘programmer’.
Ada 95 The version of the language that conforms to ANSI/ISO/IEC 8652:1995,
January 1995. The ISO standard was published on 15th February 1995. Ada
95 is now often referred to as Ada
Ada class
Allocator
In Ada the terminology class is used to describe a set of types. To avoid
confusion this will be termed an Ada class.
An allocator is used to claim storage dynamically from a storage pool. For
example, storage for an Integer is allocated dynamically with:
P_Int := new Integer;
Base class
Class
A class from which other classes are derived.
The specification of a type and the operations that are performed on an
instance of the type. A class is used to create objects that share a common
structure and behaviour.
The specification of a class Account is as follows:
package Class_Account is
type Account is private;
subtype Money is Float;
function Balance ( The:in Account ) return Money;
-- Other methods on an instance of an Account
private
type Account is record
Balance_Of : Money := 0.00; --Amount in account
end record;
end Class_Account;
© M A Smith - May not be reproduced without permission