Stephen A. Edwards Columbia University Crown
COMS W4115
Programming Languages and Translators
Summer 2016


Class meets Mondays and Wednesdays 5:30 - 8:40 PM 627 Mudd.


Name Email Office hours Location
Prof. Stephen A. Edwards see my home page 462 CSB
Richard Townsend Tu 5:30 - 7:30 TA Room (Mudd 1st floor)
Graham Gobieski Th 6 - 9 TA Room (Mudd 1st floor)


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.


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.


Date Session Lecture Notes Reading Due
Wed Jul 6

Intro. to Languages
Some Outstanding Projects
Language Processors
Ch 1, 2

Ch. 2
Fri Jul 8
Programming in OCaml

Mon Jul 11
Syntax and Parsing
Ch. 3, 4
Wed Jul 13
Syntax and Parsing Cont.

Mon Jul 18
The MicroC Compiler
App. A
pdf HW1
Wed Jul 20
Types and Static Semantics
Sec. 6.5
Mon Jul 25
Runtime Environments
Ch. 7
Wed Jul 27
Code Generation

Mon Aug 1

The Lambda Calculus
Logic Programming

Hello World
Wed Aug 3
Parallel Programming

pdf HW2
Mon Aug 8
Review for Final

Wed Aug 10 Final Exam
Thu Aug 11 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.

Cover of the Dragon Book 2nd edition

Related 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.

Cover of Programming Language Pragmatics 2nd edition

Andrew W. Appel.
Modern Compiler Implementation in ML.
Cambridge University Press, 1998.

The opposite of Scott: focuses on compiler construction, not language design issues.
It uses the functional language ML, which is closely related to O'Caml, but just different enough to be annoying.

Cover of Appel

Lawrence C. Paulson
ML for the Working Programmer.
Cambridge University Press, 1996. Second edition.

A book about functional programming. It's written for the ML language, not O'Caml, but the two are closely related.

Cover of Paulson

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.

Cover of Muchnick

Objective Caml Resources

webpage The Caml Language Homepage. Compiler downloads and documentation. Start here.
webpage The Objective Caml System. Documentation and User's Manual for the whole system, including documentation for ocamllex, ocamlyacc, ocamldep, ocamldebug, and all the standard libraries.
webpage Emmanuel Chailloux, Pascal Manoury, and Bruno Pagano, Developing Applications with Objective Caml. An online book translated from the French (O'Reilly).
webpage Objective CAML Tutorial
.tar.gz file OCaml source for the four-function calculator.
.tar.gz file OCaml source and test cases for the MicroC language, which generates LLVM IR.

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:

  1. Introduction
  2. Language Tutorial
  3. Language Manual
  4. Project Plan
  5. Architectural Design
  6. Test Plan
  7. Lessons Learned
  8. Appendix

Project Resources

pdf A two-page introduction to the CVS version control system. I strongly suggest you keep your project under some version control system.
pdf An excellent final report: the Funk language by 4115 students Naser AlDuaij, Senyao Du, Noura Farra, Yuan Kang, and Andrea Lottarini.
pdf An excellent final report: the Sheets language by 4115 students Benjamin Barg, Gabriel Blanco, Amelia Brunner, and Ruchir Khaitan.

Language Reference Manuals

pdf Dennis M. Ritchie, C Reference Manual
pdf Kernighan & Ritchie, The C Programming Language
pdf The C Language Reference Manual (SGI)
pdf Stroustrup, The C++ Programming Language
pdf The Java Language Specification
pdf The C# Language Specification


FL: Financial Computations Language (GG)
Mathew Federer
Macaw: Mathematical Calculation Language (GG)
pdfProposal pdfLRM pdfFinal Report pdfSlides ArchiveProject Files
William Hom, Yi Jian, Joseph Baker, and Christopher Chang
simpliCty: C Lite (GG)
pdfProposal pdfLRM pdfFinal Report ArchiveProject Files
Rui Gu, Adam Hadar, Zachary Moffitt, and Suzanna Schmeelk
GAL: Graph Application Language (RT)
pdfProposal pdfLRM pdfFinal Report pdfSlides ArchiveProject Files
Anton Nefedenkov, Donovan Chan, Macrina Lobo, and Andrew Feather
Liva: Java Lite (RT)
pdfProposal pdfLRM pdfFinal Report pdfSlides ArchiveProject Files
Shanqi Lu, Jiafei Song, Zihan Jiao, Yanan Zhang, and Hyoyoon Kim
YAGL: Yet Another Graph Language (RT)
pdfProposal pdfLRM pdfFinal Report pdfSlides ArchiveProject Files
Anthony Alvarez, and David Ding
Scala--: Scala Lite (SE)
pdfProposal pdfLRM pdfFinal Report pdfSlides ArchiveProject Files
Da Liu


50 % Project
40 % Final
10 % Homework


You will collaborate with your own small group on the programming project, but you may not collaborate with others on homeworks. Groups may share ideas about the programming assignments, but not code. Any two groups found submitting similar code will receive zero credit for the whole assignment, and repeat offenses will be referred to the dean. See the Columbia CS department academic policies for more details.


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