Simple Pure ObjectOriented Language

1
Simple Pure Object-Oriented Language

• By Patrick J. Sparrow

2
What is it?

• - Idea of Professor Jackowitz

- Simple Syntax
- Pure Object-Orientation
- Support from software library
3
Outline
- Simple
- Pure
- Usefulness
- Similar Attempts
- Current Progress
- Goals
4
The Simple Part

• - Define a simple syntax

- Provide support for Java Standard Library

• - Translate source code to Java

5
Simple Syntax

• - LISP-like

- No abbreviation
- Allow nested statements
6
Support the Java Standard Library

• The CONSTRUCT instruction

Java statement FileReader F new
FileReader(hello.txt)
7
Support the Java Standard Library

• The CONSTRUCT instruction

New langauge statement (CONSTRUCT FileReader
F (hello.txt))
8
Support the Java Standard Library

• The CALL instruction

Java statement String T S.toLowercase()
9
Support the Java Standard Library

• The CALL instruction
• New language statement
• (CONSTRUCT String T (CALL S toLowercase ( ) )

10
Java Translator

• - Written in Java

- Rich library support
- Uniformity

• - Allow anyone familiar with Java to understand
  the translation process

11
The Pure Part

• - Treat everything as an object

- Create a library of new abstractions
12
Treat everything as an object

• Map intrinsic types to Objects
• int ? Integer
• double ? Double
• char ? Character
• boolean ? Boolean

13
Library of new abstractions

• Java classes for entities not found in the Java
  Standard Library

Bit
Processor
Array
Other data structures
14
Usefulness

• Can be used by anyone
• Only requires Java support
• Possible use in OS and PL courses

15
Similar Attempts

• CLOS , XLISP
• Allow classes and methods
• Lack library support

16
Current Progress

• Near-working simple LISP to Java translator
• Started research into useful abstractions not
  found in Java

17
Goals

• Complete basic LISP to Java translator
• Add CONSTRUCT and CALL support
• Add if statement support
• Add looping support
• Complete a library of new abstractions

18
The end

• Got Questions???