Object-oriented Software in Ada 95

xv
Preface
The example programs shown in this book use the following conventions:
Item in program Example Convention used
Attribute of an object
or type
Class
Instance method:
function or procedure
Integer'Last
package Class_cell is
type Cell is
private
private
end Class_cell;
Display(The:in Cell)
Starts with an upper-case letter.
Is declared as a package prefixed
with the name ‘Class_’. The class
name is given to the private type
that is then used to elaborate
instances of the class.
The function or procedure is in
lowercase and the first parameter
passed to it is an instance of the
class which is named the.
Instance attribute:
a data item contained
in an object.
Class attribute:
a global data item that
is shared between all
instances of the class
Constant or
enumeration
Balance: Float;
The_Count: Integer;
Max
Starts with an upper-case letter in
the private part of the package.
Starts with The_ and is declared in
the private part of the package.
Starts with an upper-case letter.
Function or procedure Deposit Starts with an upper-case letter..
Package Pack_Account Starts with ‘Pack_’.
Formal parameter Amount Starts with an upper-case letter.
Protected type protected type PT_Ex
is
Starts with ‘PT_’
entry Put(i:in T);
entry get(i:out T);
end PT_ex;
Reserved word procedure Is in bold lower-case.
Task type task type Task_Ex is Starts with ‘Task_’.
entry Start;
end Task_Ex;
Type or subtype Colour Starts with an upper-case letter.
Variable name
Mine
P_Ch
1.1 Glossary of terms used
Starts with an upper-case letter..
An access value for an item will
start with ‘P_’.
Access type
Access value
A type used to elaborate an access value
The address of an object.
© M A Smith - May not be reproduced without permission