
	COMS W4115 Programming Languages and Translators Spring 2007

General Information

Class meets Mondays and Wednesdays, 1:10 PM - 2:25 PM in 627 Mudd.

Staff

Name	Email	Office hours	Location
Prof. Stephen A. Edwards	sedwards@cs.columbia.edu	T 3-4, W 4-5	462 CSB
Abhilash Itharaju	ai2160@columbia.edu	W 3-4 W, Th 4:45-5:45	TA Room
Neesha Subramaniam	ns2295@columbia.edu	T 4-5, Th 3-4	TA Room
Tae Yano	ty2142@columbia.edu	M 4-5, W 5-6	TA Room

Overview

The goal of PLT is to teach you both about the structure of computer programming languages and the basics of implementing compilers for such languages.

The course will focus mostly on traditional imperative and object-oriented languages, but will also cover functional and logic programming, concurrency issues, and some aspects of scripting languages. Homework and tests will cover language issues. You will design and implement a language of your own design in a semester-long group project.

While few of you will ever implement a full commercial compiler professionally, the concepts, techniques, and tools you will learn have broad application.

Prerequisites

Java fluency: You will be writing a large Java program and must know the language well.

COMS W3157 Advanced Programming: You will be dividing into teams to build a compiler, so you need to have some idea how to keep this under control. Quick test: you need to know about Makefiles and source code control systems.

COMS W3261 Computability and Models of Computation: You will need an understanding of formal languages and grammar to build the parser and lexical analyzer. Quick test: you must know about regular expressions, context-free grammars, and NFAs.

Schedule

Date	Lecture	Reading	Due
January 17	Intro. to Languages	Ch. 1, 2
January 22	Language Design
January 24	Language Processors	Ch. 2
January 29	Scripting Languages	Ch. 2
January 31	Syntax and Parsing	Ch 3, 4
February 5	"
February 7	Getting it right		Proposal
February 12	ANTLR	Ch. 4
February 14	ASTs	Ch. 4, 5
February 19	Names, Scope, and Bindings	Ch. 6
February 21	"		HW1
February 26	Control-flow	Ch. 6
February 28	"
March 5	Midterm review		LRM
March 7	Midterm
March 12-16	Spring Break
March 19	Small Examples	App. A
March 21	Types	Ch. 6
March 26	"
March 28	Code Generation	Ch. 6, 7, 8
April 2	"
April 4	(class canceled)
April 9	Functional Programming
April 11	"
April 16	(no lecture)
April 18	(no lecture)
April 23	Logic Programming		HW2
April 25	Review for final
April 30	Final Exam
May 7	Project reports due

Required Text

Alfred V. Aho, Monica Lam, Ravi Sethi, and Jeffrey D. Ullman.
Compilers: Principles, Techniques, and Tools.
Addison-Wesley, 2006. Second Edition.

The first edition was long the standard text on compilers; the second edition of the ``dragon book'' has now been updated and continues to be one of the more readable books on the topic. Columbia's own Prof. Al Aho is one of the authors.

Optional Texts

Michael L. Scott. Programming Language Pragmatics Morgan Kaufmann, 2006. Second Edition. A broad-minded book about languages in general, but has less on practical details of compiler construction.
Andrew W. Appel. Modern Compiler Implementation in Java. Cambridge University Press, 1998. The opposite of Scott: focuses on compiler construction, not language design issues.
Steven S. Muchnick Advanced Compiler Design and Implementation. Morgan Kaufmann, 1997. A very extensive book on many aspects of compiler design. Starts about halfway through Appel and goes much farther. Recommended for serious compiler hackers only.

The Project

The focus of 4115 is the design and implementation of a little language. You will divide into teams and design the goals, syntax, and semantics of your language, and implement a compiler for your language.

Exception: CVN students will do the project individually.

Final Report Outline

This is a critical part of the project and will be a substantial fraction of the grade.

Include the following sections:

Introduction
- Include your language white paper.
Language Tutorial
- A short explanation telling a novice how to use your language.
Language Manual
- Include your language reference manual.
Project Plan
- Identify process used for planning, specification, development and testing
- Include a one-page programming style guide used by the team
- Show your project timeline
- Identify roles and responsibilities of each team member
- Describe the software development environment used (tools and languages)
- Include your project log
Architectural Design
- Give block diagram showing the major components of your translator
- Describe the interfaces between the components
- State who implemented each component
Test Plan
- Show two or three representative source language programs along with the target language program generated for each
- Show the test suites used to test your translator
- Explain why and how these test cases were chosen
- What kind of automation was used in testing
- State who did what
Lessons Learned
- Each team member should explain his or her most important learning
- Include any advice the team has for future teams
Appendix
- Attach a complete code listing of your translator with each module signed by its author
- Do not include any ANTLR-generated files, only the .g sources.

Project Resources

	A Two-page Introduction to ANTLR
	An ANTLR implementation of the little language from Appendix A of the second edition of the Dragon Book.
	An ANTLR example illustrating how to display ASTs. Run SimpLexer.g through ANTLR, compile the generated .java files along with Main.java and run "java Main < test.txt" to both print the AST in a human-readable way and display it in a window.
	The ANTLR homepage
	A two-page introduction to the CVS version control system. I strongly suggest you keep your project under some version control system.
	A sample final report by Chris Conway, Cheng-Hong Li, and Megan Pengelly. It includes the white paper, tutorial, language reference manual, project plan, architectural design, and testing plan. It does not include the lessons learned and code listings sections, although it should.
	Source for the very successful MX language project from Spring 2003.
	The class homepage for Fall 2006.
	Projects from Fall 2005.
	Projects from Fall 2004.
	Projects from Spring 2003
	Projects from Fall 2003

Proposals

	The Java white paper from Sun Microsystems
	C# Introduction and Overview

Language Reference Manuals

	Dennis M. Ritchie, C Reference Manual
	Kernighan & Ritchie, The C Programming Language
	The C Language Reference Manual (DEC)
	The C Language Reference Manual (SGI)
	The C Language Reference Manual (Microsoft)
	Stroustrup, The C++ Programming Language
	The Java Language Specification
	The C# Language Specification
	Aho, Kernighan, and Weinberger, The AWK Programming Language

This Term's Projects

FunkGL: 3D Graphics Manipulation Language (TY)