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This bibliography attempts to cover all of the literature on gradual typing, defined as safe interoperability between typed and untyped portions of a single program. It begins with the original work on gradual typing, which was independently presented by four sets of authors in between September 2006 and January 2007, and then covers the extensive subsequent literature, both theoretical and practical.

The latter sections cover related work. First, early work on safe interoperation, such as the work on contracts. Second, work on type systems (broadly defined) designed to work with existing untyped languages, including recent work done in the context of gradual typing. Work on type system design that also considers issues of interoperability with untyped programs appears in the main section of the bibliography.


For papers written in Scribble, this bibliography can be installed as a package and referenced directly from the paper. Use the following command to install:

raco pkg install git://github.com/samth/gradual-typing-bib

Sample use:

#lang scribble/base

@(require gradual-typing-bib
          scriblib/autobib)

@(define-cite ~cite citet generate-bibliography)

Original gradual typing papers
@~cite[st-sfp-2006 thf-dls-2006 mf-toplas-2007 gktff-sfp-2006].

@generate-bibliography[]

Gradual Typing

The original papers

These four papers all independently introduce the fundamental idea of gradual typing: dynamic enforcement of types using contracts.

Gradual typing for functional languages.

Jeremy G. Siek and Walid Taha.
In Seventh Workshop on Scheme and Functional Programming, University of Chicago Technical Report TR-2006-06, pages 81–92, September 2006.
http://ecee.colorado.edu/~siek/pubs/pubs/2006/siek06_gradual.pdf

Interlanguage migration: from scripts to programs.

Sam Tobin-Hochstadt and Matthias Felleisen.
In OOPSLA ’06: Companion to the 21st annual ACM SIGPLAN Conference on Object Oriented Programming, Systems, Languages, and Applications, pages 964–974. ACM Press, 2006.
http://www.ccs.neu.edu/racket/pubs/dls06-tf.pdf

Operational semantics for multi-language programs

Jacob Matthews and Robert Bruce Findler
POPL 2007
See subsequent version in TOPLAS 2009.
http://www.eecs.northwestern.edu/~robby/pubs/papers/toplas09-mf.pdf

Sage: Hybrid Checking for Flexible Specifications

Jessica Gronski, Kenneth Knowles, Aaron Tomb, Stephen N. Freund, and Cormac Flanagan In Seventh Workshop on Scheme and Functional Programming, University of Chicago Technical Report TR-2006-06, pages 93-104, September 2006.
http://users.soe.ucsc.edu/~atomb/gronski06sage.pdf

Subsequent work

Every paper below here cites at least one of the 4 original papers.

Sage: Unified Hybrid Checking for First-Class Types, General Refinement Types, and Dynamic. (extended report)

Kenneth Knowles, Aaron Tomb, Jessica Gronski, Stephen N. Freund, Cormac Flanagan. Technical report, May 2007
http://sage.soe.ucsc.edu/sage-tr.pdf

Space-efficient gradual typing.

David Herman, Aaron Tomb, and Cormac Flanagan. In Proceedings of the Eighth Symposium on Trends in Functional Programming, TFP 2007, pages 1–18, 2008. (See subsequent journal version.)

Gradual typing for objects.

Jeremy G. Siek and Walid Taha.
In ECOOP 2007, volume 4609 of LCNS, pages 2–27. Springer Verlag, August 2007.
http://aszt.inf.elte.hu/~gsd/s/cikkek/concepts/2007/gradual-obj.pdf

Advanced Macrology and the Implementation of Typed Scheme.

Ryan Culpepper, Sam Tobin-Hochstadt, and Matthew Flatt.
In Proceedings of the 2007 Workshop on Scheme and Functional Programming, Universit́e Laval Technical Report DIUL-RT-0701, pages 1–13, 2007
http://www.ccs.neu.edu/racket/pubs/scheme2007-ctf.pdf

Well-typed programs can’t be blamed

Philip Wadler and Robert Bruce Findler
In Proceedings of the 2007 Workshop on Scheme and Functional Programming, Universit́e Laval Technical Report DIUL-RT-0701, pages 1–13, 2007
http://www.eecs.northwestern.edu/~robby/pubs/papers/scheme2007-wf.pdf

Evolutionary Programming and Gradual Typing in ECMAScript 41

Lars T Hansen Adobe Systems Technical Report, November 2007
http://archives.ecma-international.org/2007/TG1/tc39-tg1-2007-045.pdf

Status report: specifying JavaScript with ML

David Herman, Cormac Flanagan Proceedings of the 2007 workshop on Workshop on ML, Pages 47-52, 2007.
http://users.soe.ucsc.edu/~cormac/papers/ml07.pdf

The design and implementation of Typed Scheme.

Sam Tobin-Hochstadt and Matthias Felleisen.
In POPL ’08: Proceedings of the 35th ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, pages 395–406. ACM Press, 2008
http://www.ccs.neu.edu/racket/pubs/popl08-thf.pdf

Safe Cross-Language Inheritance

Kathryn E. Gray
In proceedings of ECOOP 2008
http://www.cl.cam.ac.uk/~keg29/inheritance-model/inheritance.pdf

Gradual typing with unification-based inference

Jeremy G. Siek, Manish Vachharajani
DLS '08 Proceedings of the 2008 symposium on Dynamic languages, 2008
http://ecee.colorado.edu/~siek/dls08igtlc.pdf

The Design and Implementation of Typed Scheme

Sam Tobin-Hochstadt and Matthias Felleisen.
To appear in Higher-Order and Symbolic Computation.

Well-typed programs can’t be blamed

Philip Wadler and Robert Bruce Findler
In ESOP ’09: Proceedings of the Eighteenth European Symposium on Programming, volume 5502 of Lecture Notes in Computer Science, pages 1–16. Springer-Verlag, 2009.

Exploring the Design Space of Higher-Order Casts

Jeremy Siek, Ronald Garcia, Walid Taha In ESOP ’09: Proceedings of the Eighteenth European Symposium on Programming, volume 5502 of Lecture Notes in Computer Science, pages 17-31. Springer-Verlag, 2009.
http://ecee.colorado.edu/~siek/siek09esop.pdf

A Model of Java/Scheme Interoperability

Kathryn E. Gray Chapter of Semantics Engineering with PLT Redex Edited by Robert Bruce Findler, Matthew Flatt, and Matthias Felleisen. MIT Press 2009

Operational semantics for multi-language programs

Jacob Matthews and Robert Bruce Findler
ACM Transactions on Programming Languages and Systems, 31(3):1–44, 2009.
http://www.eecs.northwestern.edu/~robby/pubs/papers/toplas09-mf.pdf

Gradual typing for Featherweight Java.

Lintaro Ina and Atsushi Igarashi. Computer Software, 26(2):18–40, 2009.

In Japanese: Featherweight Java のための漸進的型付け https://www.jstage.jst.go.jp/article/jssst/26/2/26_2_2_18/_pdf

Static type inference for Ruby

Michael Furr, Jong-hoon (David) An, Jeffrey S. Foster, and Michael Hicks
In SAC ’09: Proceedings of the 2009 ACM Symposium on Applied Computing, pages 1859–1866. ACM Press, 2009

STOP ’09: Proceedings for the 1st workshop on Script to Program Evolution

Tobias Wrigstad, Nate Nystrom, and Jan Vitek, editors.
ACM Press 2009

From Soft Scheme to Typed Scheme: Experiences from 20 Years of Script Evolution, and Some Ideas on What Works (Talk)

Matthias Felleisen Invited talk at STOP 2009 http://www.ccs.neu.edu/home/matthias/Presentations/stop.html

Towards gradual typing for generics

Lintaro Ina, Atsushi Igarashi
STOP '09 Proceedings for the 1st workshop on Script to Program Evolution, 2009
See subsequent version in OOPSLA 2011

A theory of typed coercions and its applications

Nikhil Swamy, Michael Hicks, Gavin M. Bierman Proceedings of the 14th ACM SIGPLAN international conference on Functional programming, Pages 329-340, 2009

Threesomes, with and without blame

Jeremy G. Siek, Philip Wadler
STOP '09 Proceedings for the 1st workshop on Script to Program Evolution, 2009
See subsequent version in POPL 2010. http://homepages.inf.ed.ac.uk/wadler/papers/threesomes-stop/threesomes-stop.pdf

Software Hardening: A Research Agenda

Wrigstad, Eugster, Field, Nystrom, Vitek
STOP '09 Proceedings for the 1st workshop on Script to Program Evolution, 2009

Cycles without pollution: a gradual typing poem.

Sam Tobin-Hochstadt and Robert Bruce Findler.
STOP '09 Proceedings for the 1st workshop on Script to Program Evolution, 2009, pages 47–57

Tests to the left of me, types to the right: how not to get stuck in the middle of a Ruby execution.

Michael Furr, Jong-hoon (David) An, Jeffrey S. Foster, and Michael Hicks.
STOP '09 Proceedings for the 1st workshop on Script to Program Evolution, 2009, pages 14–16.

Thorn: Robust, Concurrent, Extensible Scripting on the JVM.

Bard Bloom, John Field, Nathaniel Nystrom, Johan Ostlund, Gregor Richards, Rok Strnisa, Jan Vitek, and Tobias Wrigstad.
In OOPSLA, 2009.

Of scripts and programs: tall tales, urban legends, and future prospects

Jan Vitek
Invited talk at DLS 2009 http://dl.acm.org/citation.cfm?id=1640134.1640136

Combining Static and Dynamic Typing in Ruby

Michael Furr Ph.D. Thesis, University of Maryland, 2009

Extending Dylan’s Type System for Better Type Inference and Error Detection

Hannes Mehnert Diploma Thesis, Technische Universit ̈at Berlin, October 1, 2009

Typed Scheme: From Scripts to Programs.

Sam Tobin-Hochstadt
PhD Dissertation, Northeastern University, January 2010.

Integrating typed and untyped code in a scripting language.

Tobias Wrigstad, Francesco Zappa Nardelli, Sylvain Lebresne, Johan Ostlund, and Jan Vitek.
In Symposium on Principles of Programming Languages, 2010.

Threesomes, with and without blame.

Jeremy G. Siek and Philip Wadler.
In Symposium on Principles of Programming Languages, 2010.

Adding types to untyped languages

Matthias Felleisen Invited talk at TLDI '10 Proceedings of the 5th ACM SIGPLAN workshop on Types in language design and implementation
http://dl.acm.org/citation.cfm?id=1708016.1708017

Space-efficient gradual typing

David Herman, Aaron Tomb, and Cormac Flanagan Higher-Order and Symbolic Computation, Vol. 23 No. 2, pages 167-189, 2010

Adding dynamic types to C#.

Gavin Bierman, Erik Meijer, and Mads Torgersen. In European Conference on Object-Oriented Programming, ECOOP’10. Springer-Verlag, 2010.

Extending Dylan's type system for better type inference and error detection

Hannes Mehnert Proceedings of the 2010 international conference on Lisp, Pages 1-10, 2010. https://doi.org/10.1145/1869643.1869645

Interoperability in a Scripted World: Putting Inheritance and Prototypes Together

Kathryn E. Gray
FOOL 2010

Blame for All.

Amal Ahmed, Robert Bruce Findler, Jeremy G. Siek, and Philip Wadler.
In Symposium on Principles of Programming Languages, January 2011. http://homepages.inf.ed.ac.uk/wadler/papers/blame-for-all/blame-for-all.pdf

Proceedings of the Second Workshop on Script to Program Evolution.

Edited by Robert Bruce Findler January 2011

Languages as Libraries

Sam Tobin-Hochstadt, Vincent St-Amour, Ryan Culpepper, Matthew Flatt, and Matthias Felleisen PLDI 2011

Always-available static and dynamic feedback.

M. Bayne, R. Cook, and M.D. Ernst.
In International Conference on Software Engineering, 2011.

Gradual typestate.

Roger Wolff, Ronald Garcia, Éric Tanter, and Jonathan Aldrich.
In European Conference on Object-Oriented Programming, ECOOP’11. Springer-Verlag, 2011. http://pleiad.dcc.uchile.cl/papers/2011/wolffAl-ecoop2011.pdf

Gradual typing for generics.

Lintaro Ina and Atsushi Igarashi.
In Proceedings of the 2011 ACM International conference on Object oriented programming systems languages and applications, OOPSLA ’11, 2011.

The impact of optional type information on jit compilation of dynamically typed languages

Mason Chang, Bernd Mathiske, Edwin Smith, Avik Chaudhuri, Andreas Gal, Michael Bebenita, Christian Wimmer, Michael Franz Proceedings of the 7th symposium on Dynamic languages, Pages 13-24, 2011

Gradual Information Flow Typing

Tim Disney and Cormac Flanagan International Workshop on Scripts to Programs, 2011

Language with a Pluggable Type System and Optional Runtime Monitoring of Type Errors

Jukka Lehtosalo and David J. Greaves International Workshop on Scripts to Programs, 2011

Application optimization when using gradual typing

Esteban Allende, Johan Fabry Proceedings of the 6th Workshop on Implementation, Compilation, Optimization of Object-Oriented Languages, Programs and Systems, Article No. 3, 2011

Foundations for Scripting Languages (Report from Dagstuhl Seminar 12011)

Edited by Robert Hirschfeld, Shriram Krishnamurthi, and Jan Vitek http://www.cs.purdue.edu/homes/jv/pubs/dagstuhl12.pdf

The ins and outs of gradual type inference.

Aseem Rastogi, Avik Chaudhuri, and Basil Hosmer.
In Proceedings of the 39th annual ACM SIGPLAN-SIGACT symposium on Principles of programming languages, POPL ’12, 2012.

Complete Monitors for Behavioral Contracts.

Christos Dimoulas, Sam Tobin-Hochstadt, and Matthias Felleisen.
European Symposium on Programming (ESOP), March 2012.

Gradual Ownership Types

I. Sergey, D. Clarke In ESOP 2012, LNCS, vol. 7211, pp. 579–599, 2012.

JavaScript as an Embedded DSL

Grzegorz Kossakowski, Nada Amin, Tiark Rompf, and Martin Odersky In ESOP 2012, LNCS, vol. 7211, pp. 409–434, 2012.

Practical Permissions for Race-Free Parallelism

Edwin Westbrook, Jisheng Zhao, Zoran Budimli ́c, and Vivek Sarkar In ESOP 2012, LNCS, vol. 7211, pp. 614–639, 2012.

Modelyze: a Gradually Typed Host Language for Embedding Equation-Based Modeling Languages

David Broman, Jeremy G. Siek EECS University of California at Berkeley Technical Report No. UCB/EECS-2012-173

Type systems directed programming language evolution: overview and research trends

Jaime Niño
ACM-SE '12 Proceedings of the 50th Annual Southeast Regional Conference

A survey/overview paper

Proceedings of the Third Workshop on Script to Program Evolution.

Edited by Sam Tobin-Hochstadt
NU CCIS Technical Report NU-CCIS-12-02, June 2012.

Towards Gradual Typing in Jython

Michael M. Vitousek, Shashank Bharadwaj, Jeremy G. Siek
STOP 2012

Interpretations of the gradually-typed lambda calculus.

Jeremy G. Siek and Ronald Garcia.
In Scheme and Functional Programming Workshop, 2012.

Method Lookup Simulation with a Gradual Typing Language

Esteban Allende, Johan Fabry In 2012 31st International Conference of the Chilean Computer Science Society. https://doi.org/10.1109/SCCC.2012.7

Gradual Typing for First-class Classes.

Asumu Takikawa, T. Stephen Strickland, Christos Dimoulas, Sam Tobin-Hochstadt and Matthias Felleisen.
Object Oriented Programming, Systems, Languages and Applications (OOPSLA), October 2012.

Chaperones and Impersonators: Runtime support for reasonable interposition

T. Stephen Strickland, Sam Tobin-Hochstadt, Robert Bruce Findler and Matthew Flatt.
Object Oriented Programming, Systems, Languages and Applications (OOPSLA), October 2012.

Optimizing Jython using invokedynamic and Gradual Typing

Shashank Bharadwaj. Master's Thesis, Department of Electrical, Energy and Computer Engineering, University of Colorado 2012. https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1056&context=ecen_gradetds

Gradual Typing for Mutable Objects

Jeremy G. Siek, Michael M. Vitousek, and Shashank Bharadwaj.
Unpublished manuscript, 2012.
http://ecee.colorado.edu/~siek/gtmo.pdf

Constraining Delimited Control with Contracts

Asumu Takikawa, T. Stephen Strickland, Sam Tobin-Hochstadt.
ESOP 2013.

The Blame Theorem for a Linear Lambda Calculus with Type Dynamic

Luminous Fennell,Peter Thiemann Trends in Functional Programming, LNCS Volume 7829, 2013, pp 37-52

The Ruby Type Checker

Brianna M. Ren, John Toman, T. Stephen Strickland, Jeffrey S. Foster
OOPS 2013

A Gradual Polymorphic Type System with Subtyping for Prolog

Spyros Hadjichristodoulou and David Warren Workshop on Logic-based Programming Environments (WLPE 2012)

Gradual typing for Smalltalk

Esteban Allende, Oscar Callaú, Johan Fabry, Éric Tanter, and Marcus Denker.
Science of Computer Programming (2013). http://pleiad.dcc.uchile.cl/papers/2013/allendeAl-scp2013.pdf

Cast Insertion Strategies for Gradually-Typed Objects

Esteban Allende, Johan Fabry, Éric Tanter Proceedings of the 9th ACM Dynamic Languages Symposium (DLS 2013), Indianapolis, IN, USA, October 2013, ACM Press http://pleiad.dcc.uchile.cl/papers/2013/allendeAl-dls2013.pdf

Gradual Security Typing with References

Luminous Fennell, Peter Thiemann. Computer Security Foundations Symposium (CSF) 2013, IEEE, 224-239. https://doi.org/10.1109/CSF.2013.22

Calculating threesomes, with blame

Ronald Garcia. ICFP 2013, ACM, New York, NY, USA, 417-428. https://doi.org/10.1145/2500365.2500603

Foundations of Typestate-Oriented Programming.

Ronald Garcia, Éric Tanter, Roger Wolff, Jonathan Aldrich: ACM TOPLAS 36(4): 12:1-12:44 (2014) http://pleiad.dcc.uchile.cl/papers/2014/garciaAl-toplas2014.pdf

Deriving interpretations of the gradually-typed lambda calculus

Álvaro García-Pérez, Pablo Nogueira, Ilya Sergey. PEPM 2014, ACM, 157-168. https://doi.org/10.1145/2543728.2543742

The Problem of Structural Type Tests in a Gradual-Typed Language

John Tang Boyland. FOOL 2014. http://www.cs.uwm.edu/faculty/boyland/papers/type-test.pdf

Gradual Typing for Annotated Type Systems

Peter Thiemann, Luminous Fennell ESOP 2014, LNCS vol. 8410, Springer. https://doi.org/10.1007/978-3-642-54833-8_4

A Theory of Gradual Effect Systems

Felipe Bañados Schwerter, Ronald Garcia, Éric Tanter. International Conference on Functional Programming 2014. http://pleiad.dcc.uchile.cl/papers/2014/banadosAl-icfp2014.pdf

Design and Evaluation of Gradual Typing for Python

Michael M. Vitousek, Andrew Kent, Jeremy G. Siek, Jim Baker Proceedings of the 10th ACM Dynamic Languages Symposium (DLS 2014), Portland, OR, USA, October 2014, ACM Press

Understanding TypeScript

Gavin Bierman, Martín Abadi, Mads Torgersen. ECOOP 2014, LNCS vol 8586, Springer. https://doi.org/10.1007/978-3-662-44202-9_11

Gradual typing embedded securely in JavaScript

Nikhil Swamy, Cédric Fournet, Aseem Rastogi, Karthikeyan Bhargavan, Juan Chen, Pierre-Yves Strub, Gavin Bierman POPL 2014, ACM, New York, NY, USA 425-437. https://doi.org/10.1145/2535838.2535889

JavaScript with Blame

Jakub Zalewski Master's Thesis, School of Informatics, University of Edinburgh. http://project-archive.inf.ed.ac.uk/msc/20141715/msc_proj.pdf

Confined Gradual Typing

Esteban Allende, Johan Fabry, Ronald Garcia, Éric Tanter. OOPSLA 2014 http://pleiad.dcc.uchile.cl/papers/2014/allendeAl-oopsla2014.pdf

Gradual evolution

Neil Savage Communications of the ACM, vol. 57 issue 10, 2014. https://doi.org/10.1145/2659764

Safe & Efficient Gradual Typing for TypeScript

Aseem Rastogi, Nikhil Swamy, Cédric Fournet, Gavin Bierman, Panagiotis Vekris. In Proceedings of the 42nd Annual ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages (POPL '15). ACM, New York, NY, USA, 167-180. https://doi.org/10.1145/2775051.2676971

Principal Type Schemes for Gradual Programs

Ronald Garcia, Matteo Cimini. POPL 2015, ACM, New York, NY, USA, 303-315. https://doi.org/10.1145/2775051.2676992

Monotonic References for Efficient Gradual Typing

Jeremy Siek, Michael M. Vitousek, Matteo Cimmini, Sam Tobin-Hochstadt, Ronald Garcia ESOP 2015, LNCS Volume 9032, pp 432-456

EMPIRICALLY-DRIVEN DESIGN AND IMPLEMENTATION OF GRADUALTALK

OSCAR EDWIN ALVAREZ CALLAU ́ Ph.D. Thesis, University of Chile, 2015. http://repositorio.uchile.cl/bitstream/handle/2250/132889/Empirically-driven-design-and-implementation-of-Gradualtalk.pdf?sequence=1

Towards Practical Gradual Typing

Asumu Takikawa, Daniel Feltey, Earl Dean, Robert Bruce Findler, Matthew Flatt, Sam Tobin-Hochstadt, Matthias Felleisen ECOOP 2015, LIPIcs Volume 37, pp 4-27

Concrete Types for TypeScript

Gregor Richards, Francesco Zappa Nardelli, Jan Vitek ECOOP 2015, LIPIcs Volume 37, pp 76-100

Refined Criteria for Gradual Typing

Jeremy G. Siek, Michael M. Vitousek, Matteo Cimini, John Tang Boyland SNAPL 2015, LIPIcs Volume 32, pp 274-293 http://drops.dagstuhl.de/opus/volltexte/2015/5031/

Customizable Gradual Polymorphic Effects for Scala

Matías Toro, Éric Tanter In Proceedings of the 2015 ACM SIGPLAN International Conference on Object-Oriented Programming, Systems, Languages, and Applications (pp. 935-953) http://pleiad.dcc.uchile.cl/papers/2015/toroTanter-oopsla2015.pdf

Gradual Certified Programming in Coq

Éric Tanter, Nicolas Tabareau Proceedings of the 11th ACM Dynamic Languages Symposium (DLS 2015), pp.26-40, Pittsburgh, PA, USA, October 2015, ACM Press http://pleiad.dcc.uchile.cl/papers/2015/tanterTabareau-dls2015.pdf

A Complement to Blame

Philip Wadler SNAPL 2015, LIPIcs vol. 32, 309-320. http://drops.dagstuhl.de/opus/volltexte/2015/5033/

A formalization of typed lua

André Murbach Maidl, Fabio Mascarenhas, Roberto Ierusalimschy DLS 2015, ACM, Pages 13-25. https://doi.org/10.1145/2816707.2816709

Shifting the Blame

T. Sekiyama, S. Ueda, A. Igarashi. APLAS 2015. LNCS, vol 9458. Springer. https://doi.org/10.1007/978-3-319-26529-2_11

LJGS: Gradual Security Types for Object-Oriented Languages

Luminous Fennell and Peter Thiemann. ECOOP 2016, Leibniz International Proceedings in Informatics (LIPIcs), Pages 9:1--9:26. http://drops.dagstuhl.de/opus/volltexte/2016/6103/

Gradual type-and-effect systems

Felipe Bañados Schwerter, Ronald Garcia, Éric Tanter. Journal of Functional Programming, vol. 26, 2016. https://doi.org/10.1017/S0956796816000162

Abstracting Gradual Typing

Ronald Garcia, Alison M. Clark, Éric Tanter POPL 2016, ACM, New York, NY, USA, 429-442. http://dl.acm.org/citation.cfm?id=2837670 http://pleiad.dcc.uchile.cl/papers/2016/garciaAl-popl2016.pdf

The Gradualizer: a methodology and algorithm for generating gradual type systems

Matteo Cimini, Jeremy Siek POPL 2016, ACM, New York, NY, USA, 443-455. http://cimini.info/publications/Gradualizer_Draft.pdf

Is Sound Gradual Typing Dead?

Asumu Takikawa, Daniel Feltey, Ben Greenman, Max New, Jan Vitek, Matthias Felleisen POPL 2016, ACM, New York, NY, USA, 456-468. http://www.ccs.neu.edu/racket/pubs/popl16-tfgnvf.pdf

The Design, Implementation, And Evaluation Of A Gradual Type System For Dynamic Class Composition

Asumu Takikawa Ph.D. Thesis, Northeastern University April 2016 http://hdl.handle.net/2047/D20213172

Blame Tracking at Higher Fidelity

Jakub Zalewski Master of Science by Research, School of Informatics, University of Edinburgh. https://project-archive.inf.ed.ac.uk/msc/20162082/msc_proj.pdf

Gradual Pluggable Typing in Java

Daniel Brotherston. Master's Thesis, University of Waterloo. https://uwspace.uwaterloo.ca/handle/10012/10409

Type Soundness in the Dart Programming Language

Fabio Strocco. Ph.D. Thesis, Aarhus University, 2016. https://pure.au.dk/portal/files/108950717/Thesis_Fabio_Strocco.pdf

Side effects take the blame

Felipe Bañados Schwerter SLE 2016, ACM, Pages 195-206. https://doi.org/10.1145/2997364.2997381

The recursive union of some gradual types

Jeremy G. Siek, Sam Tobin-Hochstadt. A List of Successes That Can Change the World (Wadler Fest), LNCS volume 9600, Springer, 2016, 388-410. https://doi.org/10.1007/978-3-319-30936-1_21

Blame and coercion: Together again for the first time

Jeremy G. Siek, Peter Thiemann, Philip Wadler. PLDI 2016, ACM, New York, NY, USA, 425-435. https://doi.org/10.1145/2737924.2737968

Partial Type Equivalences for Verified Dependent Interoperability

Pierre-Evariste Dagand, Nicolas Tabareau, Éric Tanter ICFP 2016, ACM. http://pleiad.dcc.uchile.cl/papers/2016/dagandAl-icfp2016.pdf http://dx.doi.org/10.1145/2951913.2951933

ALGT A Framework to Describe and Gradualize Programming Languages

Pieter Vander Vennet. Master's Dissertation, Ghent University. http://lib.ugent.be/fulltxt/RUG01/002/376/271/RUG01-002376271_2017_0001_AC.pdf

Theorems for free for free: Parametricity, with and without types

Amal Ahmed, Dustin Jamner, Jeremy G. Siek, Philip Wadler ICFP 2017, ACM, New York, NY, USA https://doi.org/10.1145/3110283

Gradual Security Typing

Luminous Fennell Ph.D. Thesis, University of Freiburg October 2017 https://d-nb.info/1174142367/34

Gradual session types

Atsushi Igarashi, Peter Thiemann, Vasco T. Vasconcelos, Philip Wadler ICFP 2017, ACM, New York, NY, USA https://doi.org/10.1145/3110282

On polymorphic gradual typing

Yuu Igarashi, Taro Sekiyama, Atsushi Igarashi ICFP 2017, ACM, New York, NY, USA https://doi.org/10.1145/3110284

Gradual typing with union and intersection types

Giuseppe Castagna, Victor Lanvin ICFP 2017, ACM, New York, NY, USA https://doi.org/10.1145/3110285

Sound gradual typing: Only mostly dead

Spenser A. Bauman, Sam Tobin-Hochstadt, Jeremy G. Siek, Carl Friedrich Bolz-Tereick OOPSLA 2017, ACM, New York, NY, USA https://doi.org/10.1145/3133878

The VM already knew that: leveraging compile-time knowledge to optimize gradual typing

Gregor Richards, Ellen Arteca, Alexi Turcotte OOPSLA 2017, ACM, New York, NY, USA https://doi.org/10.1145/3133879

Sound gradual typing is nominally alive and well

Fabian Muehlboeck, Ross Tate OOPSLA 2017, ACM, New York, NY, USA https://doi.org/10.1145/3133880

A Gradual Interpretation of Union Types

M. Toro, É Tanter. SAS 2017, LNCS vol. 10422, Springer. https://doi.org/10.1007/978-3-319-66706-5_19

Mixed Messages: Measuring Conformance and Non-Interference in TypeScript

Jack Williams, J. Garrett Morris, Philip Wadler, Jakub Zalewski ECOOP 2017, Leibniz International Proceedings in Informatics (LIPIcs), pages 28:1--28:29. http://drops.dagstuhl.de/opus/volltexte/2017/7264/

Migratory Typing: Ten Years Later

Sam Tobin-Hochstadt, Matthias Felleisen, Robert Findler, Matthew Flatt, Ben Greenman, Andrew M. Kent, Vincent St-Amour, T. Stephen Strickland, Asumu Takikawa SNAPL 2017, Leibniz International Proceedings in Informatics (LIPIcs), pages 17:1--17:17. http://drops.dagstuhl.de/opus/volltexte/2017/7120/

Big types in little runtime

Michael M. Vitousek, Cameron Swords, and Jeremy G. Siek. POPL 2017, ACM, New York, NY, USA, 762-774. https://doi.org/10.1145/3093333.3009849

Gradual refinement types

Nico Lehmann, Éric Tanter. POPL 2017, ACM, New York, NY, USA, 775-788. https://doi.org/10.1145/3093333.3009856

Automatically generating the dynamic semantics of gradually typed languages

Matteo Cimini, Jeremy G. Siek. POPL 2017, ACM, New York, NY, USA, 789-803. https://doi.org/10.1145/3093333.3009863

Sums of uncertainty: refinements go gradual

Khurram A. Jafery, Joshua Dunfield. POPL 2017, ACM, New York, NY, USA, 804-817. https://doi.org/10.1145/3093333.3009865

Hazelnut: a bidirectionally typed structure editor calculus

Cyrus Omar, Ian Voysey, Michael Hilton, Jonathan Aldrich, Matthew A. Hammer. POPL 2017, ACM, New York, NY, USA, 86-99. https://doi.org/10.1145/3009837.3009900

Foundations of Dependent Interoperability

Pierre-Évariste Dagand, Nicolas Tabareau, Éric Tanter JFP 2018, Cambridge Univ. Press. http://pleiad.dcc.uchile.cl/papers/2018/dagandAl-jfp2018.pdf http://dx.doi.org/10.1017/S0956796818000011

Gradually typed symbolic expressions

David Broman, Jeremy G. Siek PEPM 2018, ACM, New York, NY, USA, 15–29. https://doi.org/10.1145/3162068 https://people.kth.se/~dbro/papers/broman-siek-2018-gradually-typed-symbols.pdf

Consistent Subtyping for All

Ningning Xie, Xuan Bi, Bruno C. d. S. Oliveira. ESOP 2018, LNCS vol 10801, Springer. https://doi.org/10.1007/978-3-319-89884-1_1

On the Cost of Type-Tag Soundness

Ben Greenman, Zeina Migeed. PEPM 2018, ACM, New York, NY, USA. https://doi.org/10.1145/3162066

Graduality from embedding-projection pairs

Max S. New, Amal Ahmed. ICFP 2018, ACM, New York, NY, USA. https://doi.org/10.1145/3236768

A spectrum of type soundness and performance

Ben Greenman, Matthias Felleisen. ICFP 2018, ACM, New York, NY, USA. https://doi.org/10.1145/3236766

Casts and costs: harmonizing safety and performance in gradual typing

John Peter Campora, Sheng Chen, Eric Walkingshaw. ICFP 2018, ACM, New York, NY, USA. https://doi.org/10.1145/3236793

Migrating gradual types

John Peter Campora, Sheng Chen, Martin Erwig, Eric Walkingshaw. POPL 2018, ACM, New York, NY, USA. https://doi.org/10.1145/3158103

Gradual Program Verification

Johannes Bader, Jonathan Aldrich, Éric Tanter VMCAI 2018, Springer http://pleiad.dcc.uchile.cl/papers/2018/baderAl-vmcai2018.pdf https://doi.org/10.1007/978-3-319-73721-8_2

Efficient Gradual Typing

Andre Kuhlenschmidt and Deyaaeldeen Almahallawi and Jeremy G. Siek. arXiv:1802.06375, February 2018. https://arxiv.org/abs/1802.06375 (This is an earlier version of the PLDI 2019 paper below.)

KafKa: Gradual Typing for Objects

Benjamin Chung, Paley Li, Francesco Zappa Nardelli, Jan Vitek. ECOOP 2018, Leibniz International Proceedings in Informatics (LIPIcs), Pages 12:1--12:24. http://drops.dagstuhl.de/opus/volltexte/2018/9217/

Shallow Types for Insightful Programs: Grace is Optional, Performance is Not

Richard Roberts, Stefan Marr, Michael Homer, James Noble. arXiv:1807.00661 https://arxiv.org/abs/1807.00661

Gradual Liquid Type Inference

Niki Vazou, Éric Tanter, David Van Horn. OOPSLA 2018, ACM. https://arxiv.org/abs/1807.02132

Type-Driven Gradual Security with References

Matías Toro, Ronald Garcia, Éric Tanter. TOPLAS 2018, ACM. http://pleiad.dcc.uchile.cl/papers/2018/toroAl-toplas2018.pdf https://doi.org/10.1145/3229061

Collapsible Contracts: Fixing a Pathology of Gradual Typing

Daniel Feltey, Ben Greenman, Christophe Scholliers, Robert Bruce Findler, Vincent St-Amour. OOPSLA 2018, ACM. https://www.eecs.northwestern.edu/~robby/pubs/papers/oopsla2018-fgsfs.pdf https://doi.org/10.1145/3276503

Preemptive type checking

Grech, Neville, Bernd Fischer, Julian Rathke. Journal of Logical and Algebraic Methods in Programming, Volume 101, 2018. https://eprints.soton.ac.uk/421793/1/Preemptive_type_checking.pdf https://doi.org/10.1016/j.jlamp.2018.08.003

Gradual Parametricity, Revisited

Matías Toro, Elizabeth Labrada, Éric Tanter. POPL 2019, ACM. https://doi.org/10.1145/3290330 https://arxiv.org/abs/1807.04596

The Behavior of Gradual Types: A User Study

Preston Tunnell Wilson, Justin Pombrio, Ben Greenman, Shriram Krishnamurthi. DLS 2018, ACM. http://www.ccis.northeastern.edu/~types/publications/apples-to-apples/tgpk-dls-2018.pdf

Dynamic Type Inference for Gradual Hindley--Milner Typing

Yusuke Miyazaki, Taro Sekiyama, Atsushi Igarashi. POPL 2019, ACM. https://doi.org/10.1145/3290331 arXiv:1810.12619 October 2018 https://arxiv.org/abs/1810.12619

Gradual Intersection Types

Pedro Ângelo, Mário Florido. Workshop on Intersection Types and Related Systems (ITRS) 2018. http://t-news.cn/Floc2018/FLoC2018-pages/proceedings_paper_216.pdf

Monotonic gradual typing in a common calculus

Benjamin Chung, Jan Vitek. ISSTA 2018, ACM. https://doi.org/10.1145/3236454.3236475

Gradual Type Theory

Max S. New, Dan Licata, Amal Ahmed. POPL 2019, ACM. https://doi.org/10.1145/3290328

Gradual typing: a new perspective

Giuseppe Castagna, Victor Lanvin, Tommaso Petrucciani, Jeremy G. Siek. POPL 2019, ACM. https://doi.org/10.1145/3290329

Live Functional Programming with Typed Holes

Cyrus Omar, Ian Voysey, Ravi Chugh, Matthew Hammer. POPL 2019, ACM. https://doi.org/10.1145/3290327

Toward Efficient Gradual Typing for Structural Types via Coercions

Andre Kuhlenschmidt, Deyaaeldeen Almahallawi, Jeremy G. Siek. PLDI 2019, ACM. https://doi.org/10.1145/3314221.3314627 https://akuhlens.github.io/paper/pldi19.pdf

Complete Monitors for Gradual Types

Ben Greenman, Matthias Felleisen, Christos Dimoulas OOPSLA 2019, ACM. https://doi.org/10.1145/3360548

Gradual C Programming for Typed Lua

Rafi Shan Turas Masters Thesis 2019 University of Waterloo

Optimizing and Evaluating Transient Gradual Typing

Michael M. Vitousek, Jeremy G. Siek, Avik Chaudhuri. arXiv:1902.07808 February 2019 https://arxiv.org/abs/1902.07808 (This is an earlier version of the DLS 2019 paper that appears below.)

Gradual Typing for Python, Unguarded

Michael M. Vitousek
PhD Dissertation, Indiana University, May 2019.
http://hdl.handle.net/2022/23172

The Dynamic Practice and Static Theory of Gradual Typing

Michael Greenberg. SNAPL 2019. http://dx.doi.org/10.4230/LIPIcs.SNAPL.2019.6

Blame Tracking and Type Error Debugging

Sheng Chen, John Peter Campora III. SNAPL 2019. http://dx.doi.org/10.4230/LIPIcs.SNAPL.2019.2

Towards a Type System for R

Alexi Turcotte, Jan Vitek. ICOOOLPS 2019, ACM. https://doi.org/10.1145/3340670.3342426

Static TypeScript: An Implementation of a Static Compiler for the TypeScript Language

Thomas Ball, Peli de Halleux, Michal Moskal. MPLR 2019, ACM. https://doi.org/10.1145/3357390.3361032

Space-Efficient Gradual Typing in Coercion-Passing Style

Yuya Tsuda, Atsushi Igarashi, Tomoya Tabuchi. arXiv:1908.02414 August 2019 https://arxiv.org/abs/1908.02414

Automated Techniques forCreation and Maintenance of TypeScript Declaration Files

Erik Krogh Kristensen. Ph.D. Thesis Aarhus University August 2019 https://pure.au.dk/portal/files/161232639/thesis.pdf

Optimizing and Evaluating Transient Gradual Typing

Michael M. Vitousek, Jeremy G. Siek, Avik Chaudhuri. DLS 2019, ACM. https://doi.org/10.1145/3359619.3359742

Abstracting gradual typing: Metatheory and applications

Matias Toro Ipinza. Ph.D. Thesis University of Chile. http://repositorio.uchile.cl/handle/2250/170935

Which of my transient type checks are not (almost) free?

Isaac Oscar Gariano, Richard Roberts, Stefan Marr, Michael Homer, James Noble. VMIL 2019, ACM. https://doi.org/10.1145/3358504.3361232

Approximate Normalization for Gradual Dependent Types

Joseph Eremondi, Éric Tanter, and Ronald Garcia ICFP 2019, ACM. https://dl.acm.org/doi/10.1145/3341692

Towards Gradual Checking of Reference Capabilities

Kiko Fernandez-Reyes, Isaac Oscar Gariano, James Noble, Tobias Wrigstad. arXiv:1909.01465 September 2019 https://arxiv.org/abs/1909.01465

Gradual Typing for Extensibility by Rows

Taro Sekiyama, Atsushi Igarashi. arXiv:1910.08480 October 2019 https://arxiv.org/abs/1910.08480

Call-by-name Gradual Type Theory

Max S. New, Daniel R. Licata Logical Methods in Computer Science January 2020 https://lmcs.episciences.org/6063

Graduality and Parametricity: Together Again for the First Time

Max S. New, Dustin Jamner, Amal Ahmed POPL 2020, ACM https://dl.acm.org/doi/10.1145/3371114

What is Decidable about Gradual Typing?

Zeina Migeed, Jens Palsberg POPL 2020, ACM https://dl.acm.org/doi/10.1145/3371097

Toward a Mechanized Compendium of Gradual Typing

Jeremy G. Siek arXiv:2001.11560 January 2020 https://arxiv.org/abs/2001.11560

Gradual Typing as if Types Mattered

Ronald Garcia, Éric Tanter Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final28-acmpaginated.pdf

Foreign Function Typing: Semantic Type Soundness for FFIs

Daniel Patterson, Amal Ahmed Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final23-acmpaginated.pdf

Gradual Verification of Recursive Heap Data Structures

J. Wise, B. Johannes, J. Aldrich, É. Tanter Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final10-acmpaginated.pdf

Fully Abstract from Static to Gradual

K. Jacobs, A. Timany, D. Devriese Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final46-acmpaginated.pdf

Space-Efficient Monotonic References

D. Almahallawi, Jeremy G. Siek Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final70-acmpaginated.pdf

λdB: Blame tracking at higher fidelity

J. Zalewski, J. McKinna, J.G. Morris, P. Wadler Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final98-acmpaginated.pdf

Hypercoercions and a Framework for Equivalence of Cast Calculi

K. Lu, Jeremy G. Siek, A. Kuhlenschmidt Workshop on Gradual Typing January 2020 https://wgt20.irif.fr/wgt20-final09-acmpaginated.pdf

A gradually typed subset of a scripting language can be simple and efficient

Hugo Musso Gualandi, Roberto Ierusalimschy Draft January 2020 http://www.inf.puc-rio.br/~hgualandi/papers/manuscript-Gualandi-JFP-2020-01-30.pdf

First-order Gradual Information Flow Types with Gradual Guarantees

Abhishek Bichhawat, McKenna McCall, Limin Jia arXiv:2003.12819 March 2020 https://arxiv.org/abs/2003.12819

LambdaNet: Probabilistic Type Inference using Graph Neural Networks

Jiayi Wei, Maruth Goyal, Greg Durrett, Isil Dillig arXiv:2005.02161 April 2020 https://arxiv.org/abs/2005.02161

Pallene: A companion language for Lua

Hugo Musso Gualandi, Roberto Ierusalimschy, 2020 Science of Computer Programming April 2020 https://doi.org/10.1016/j.scico.2020.102393

Reconciling Noninterference and Gradual Typing

Arthur Azevedo de Amorim, Matt Fredrikson, Limin Jia Logic in Computer Science (LICS) July 2020 http://arthuraa.net/docs/glio.pdf

Abstracting gradual references

Matías Toro, Éric Tanter Science of Computer Programming Volume 197, 2020 https://doi.org/10.1016/j.scico.2020.102496

Abstracting Gradual Typing Moving Forward : Precise and Space-Efficient

Felipe Bañados Schwerter, Alison M. Clark, Khurram A. Jafery, Ronald Garcia POPL 2021 https://dl.acm.org/doi/10.1145/3434342

Corpse Reviver: Sound and Efficient Gradual Typing via Contract Verification

Cameron Moy, Phúc C. Nguyễn, Sam Tobin-Hochstadt, David Van Horn POPL 2021 https://dl.acm.org/doi/abs/10.1145/3434334

Fully Abstract from Static to Gradual

Koen Jacobs, Amin Timany, Dominique Devriese POPL 2021 https://dl.acm.org/doi/abs/10.1145/3434288

Deep and Shallow Types

Ben Greenman Ph.D. Thesis, Northeastern University November 2020 http://ccs.neu.edu/home/types/resources/pdf/g-dissertation-2020.pdf

Towards Efficient Gradual Typing Via Monotonic References And Coercions

Deyaaeldeen Almahallawi Ph.D. Thesis, Indiana University May 2020 https://www.dropbox.com/s/oiui3q0l76z5pbo/deyaa-dissertation.pdf?dl=1

A Semantic Foundation for Sound Gradual Typing

Max New Ph.D. Thesis, Northeastern University 2020 http://maxsnew.com/docs/dissertation.pdf

Taming type annotations in gradual typing

John Peter Campora and Sheng Chen OOPSLA 2020 https://doi.org/10.1145/3428259

Gradual verification of recursive heap data structures

Jenna Wise, Johannes Bader, Cameron Wong, Jonathan Aldrich, Éric Tanter, Joshua Sunshine OOPSLA 2020 https://doi.org/10.1145/3428296

Where to Start: Studying Type Annotation Practices in Python

W. Jin, D. Zhong, Z. Ding, M. Fan and T. Liu ASE 2021 https://doi.org/10.1109/ASE51524.2021.9678947

Label dependent lambda calculus and gradual typing

Weili Fu, Fabian Krause, Peter Thiemann OOPSLA 2021 https://doi.org/10.1145/3485485

GATE: Gradual Effect Types

Philip Wadler ISoLA 2021: Leveraging Applications of Formal Methods, Verification and Validation https://doi.org/10.1007/978-3-030-89159-6_21

A Transient Semantics for Typed Racket

Ben Greenman, Lukas Lazarek, Christos Dimoulas, Matthias Felleisen 2021 https://doi.org/10.48550/arXiv.2111.10411

Transitioning from structural to nominal code with efficient gradual typing

Muehlboeck, Fabian, and Ross Tate. OOPSLA 2021 https://doi.org/10.1145/3485504

Gradually structured data

Stefan Malewski, Michael Greenberg, Éric Tanter OOPSLA 2021 https://doi.org/10.1145/3485503

A Reasonably Gradual Type Theory

Kenji Maillard, Meven Lennon-Bertrand, Nicolas Tabareau, Éric Tanter 2022 https://hal.inria.fr/hal-03596652/

Early Work on Interoperation

These papers all consider the challenges of interoperability between typed and untyped languages, which is at the core of the gradual typing project. Papers about type checking untyped languages that do not consider interoperation appear in the next section.

Quasi-static Typing

Satish Thatte
In Proceedings of the 17th ACM SIGPLAN-SIGACT symposium on Principles of programming languages (POPL '90). ACM, New York, NY, USA, 367-381.

Pluggable type systems.

Gilad Bracha.
In OOPSLA Workshop on the Revival of Dynamic Languages, 2004.

Contracts for higher-order functions

Robert Bruce Findler and Matthias Felleisen
In ICFP ’02: Proceedings of the Seventh ACM SIGPLAN International Conference on Functional Programming, pages 48–59. ACM Press, 2002

BabyJ: From Object Based to Class Based Programming via Types

Christopher Anderson, Sophia Drossopoulou
Proceedings of Workshop on Object Oriented Developments 2003, Electronic Notes in Theoretical Computer Science, Volume 82, Issue 8, October 2003, Pages 53–81

Compiling Java to PLT Scheme

Kathryn E. Gray and Matthew Flatt.
In Scheme Workshop 2004

Fine-grained interoperability through mirrors and contracts.

Kathryn E. Gray, Robert Bruce Findler, and Matthew Flatt.
In OOPSLA ’05: Proceedings of the 20th annual ACM SIGPLAN Conference on Object Oriented Programming, Systems, Languages, and Applications, pages 231–245. ACM Press, 2005

Hybrid type checking.

Cormac Flanagan.
In Conference Record of POPL ’06: The 33th ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, pages 245–256. ACM Press, 2006.

Towards Customizable Pedagogic Programming Languages

Kathryn E. Gray
PhD Dissertation, University of Utah, School of Computing, August 2006.

Introducing safe unknown types in Java-like languages

Giovanni Lagorio and Elena Zucca ACM Symp. on Applied Computing (SAC 2006), Special Track on Object-Oriented Programming Languages and Systems, 2006

Just: safe unknown types in Java-like languages

Giovanni Lagorio and Elena Zucca Journal of Object Technology, Vol. 6, No. 2, Special Issue OOPS Track at SAC 2006, February 2007

Related

Contracts

Unifying Hybrid Types and Contracts.

Jessica Gronski, Cormac Flanagan. Trends in Functional Programming, 2007.

Polymorphic Contracts

João Filipe Belo, Michael Greenberg, Atsushi Igarashi, Benjamin C. Pierce Programming Languages and Systems, LNCS Volume 6602, 2011, pp 18-37 http://www.seas.upenn.edu/~mgree/papers/esop2011sub_fh.pdf

Manifest Contracts

Michael Greenberg. PhD Dissertation, University of Pennsylvania, January 2013. https://repository.upenn.edu/cgi/viewcontent.cgi?article=1625&context=edissertations

Sound and Complete Models of Contracts

Matthias Blume and David Mcallester. Journal of Functional Programming, vol 16, 2006. https://doi.org/10.1017/S0956796806005971

On Contract Satisfaction in a Higher-order World

Christos Dimoulas and Matthias Felleisen. ACM Transactions on Programming Languages and Systems (TOPLAS), 33(5):1–29, 2011. https://doi.org/10.1145/2039346.2039348

Does Blame Shifting Work?

Lukas Lazarek, Alexis King, Samanvitha Sundar, Robert Bruce Findler, Christos Dimoulas POPL 2020, ACM https://dl.acm.org/doi/10.1145/3371133

Typing Untyped Languages

These papers address the challenges of type checking existing untyped programs and programming languages, but do not address the core gradual type checking concern of interoperability.

User-defined data types as an aid to verifying LISP programs.

Robert Cartwright.
In International Conference on Automata, Languages and Programming, pages 228–256, 1976.

Inferring types in Smalltalk

Norihisa Suzuki
POPL '81 Proceedings of the 8th ACM SIGPLAN-SIGACT symposium on Principles of programming languages

Creating efficient systems for object-oriented languages

Norihisa Suzuki and Minoru Terada
POPL '84 Proceedings of the 11th ACM SIGACT-SIGPLAN symposium on Principles of programming languages

TS: An Optimizing Compiler for Smalltalk

Ralph E. Johnson and Justin O. Graver and Lawrence W. Zurawski OOPSLA '88: Proceedings of the 3rd annual ACM SIGPLAN Conference on Object Oriented Programming, Systems, Languages, and Applications, pages 18-26. http://dl.acm.org/citation.cfm?id=62086

Static type inference in a dynamically typed language

Alexander Aiken and Brian R. Murphy
In POPL ’91: Proceedings of the 18th ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, pages 279–290. ACM Press, 1991.

Soft typing.

Robert Cartwright and Mike Fagan.
In PLDI ’91: Proceedings of the ACM SIGPLAN 1991 Conference on Programming Language Design and Implementation, pages 278–292. ACM Press, 1991.

Strongtalk: typechecking Smalltalk in a production environment.

Gilad Bracha and David Griswold.
In OOPSLA ’93: Proceedings of the 8th annual ACM SIGPLAN Conference on Object Oriented Programming, Systems, Languages, and Applications, pages 215–230. ACM Press, 1993.

Strong Static Type Checking for Functional Common Lisp

Robert Akers
University of Texas Dissertation, also Computational Logic Inc Technical Report 96
ftp://ftp.cs.utexas.edu/pub/boyer/diss/akers.pdf

Soft typing with conditional types.

Alexander Aiken, Edward L. Wimmers, and T. K. Lakshman
In POPL ’94: Proceedings of the 21st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, pages 163–173. ACM Press, 1994

Dynamic typing: Syntax and proof theory.

Fritz Henglein.
Science of Computer Programming, 22(3):197–230, 1994.

Safe polymorphic type inference for a dynamically typed language: translating Scheme to ML.

Fritz Henglein and Jakob Rehof.
In FPCA ’95: Proceedings of the Seventh International Conference on Functional Programming Languages and Computer Architecture, pages 192–203. ACM Press, 1995.

Infer: A statically-typed dialect of Scheme.

Christopher T. Haynes
Technical Report 367, Indiana University, 1995.

Catching bugs in the web of program invariants

Cormac Flanagan, Matthew Flatt, Shriram Krishnamurthi, Stephanie Weirich, and Matthias Felleisen
In Proceedings of the ACM SIGPLAN 1996 conference on Programming language design and implementation (PLDI '96)
http://www.ccs.neu.edu/racket/pubs/#pldi96-ffkwf

The Strongtalk Type System for Smalltalk.

Gilad Bracha
OOPSLA96 Workshop on Extending the Smalltalk Language, 1996
http://www.bracha.org/nwst.html

Program Verification through Soft Typing

Robert Cartwright and Matthias Felleisen
ACM Computing Surveys 28, 2 (June 1996)
http://www.ccs.neu.edu/racket/pubs/#cs96-cf

Componential set-based analysis

Cormac Flanagan and Matthias Felleisen
In Proceedings of the ACM SIGPLAN 1997 conference on Programming language design and implementation (PLDI '97)
http://www.ccs.neu.edu/racket/pubs/#pldi97-ff

A practical subtyping system for Erlang.

Simon Marlow and Philip Wadler.
In ICFP ’97: Proceedings of the Second ACM SIGPLAN International Conference on Functional Programming, pages 136–149. ACM Press, 1997. http://homepages.inf.ed.ac.uk/wadler/topics/erlang.html

A practical soft type system for Scheme.

Andrew K. Wright and Robert Cartwright. ACM Transactions on Programming Languages and Systems, 19(1):87–152, 1997

A New Way of Debugging LISP Programs

Cormac Flanagan and Matthias Felleisen
In Lisp in the Mainstream: The 40th Annniversary Conference of Lisp Users.
Berkeley, November 1998.
http://www.ccs.neu.edu/racket/pubs/#lugm98-ff

Componential set-based analysis

Cormac Flanagan and Matthias Felleisen
ACM Trans. Program. Lang. Syst. 21, 2 (March 1999), 370-416
http://www.ccs.neu.edu/racket/pubs/#toplas99-ff

Revised NISP manual.

Drew McDermott.
Technical Report YALE/DCS/RR-642, Yale University, Department of Computer Science, 2004

Starkiller: A static type inferencer and compiler for Python.

Michael Salib.
Master’s thesis, Massachusetts Institute of Technology, Cambridge, Massachusetts, 2004.

A Type Notation for Scheme.

Gary T. Leavens, Curtis Clifton, and Brian Dorn.
Technical Report 05-18a, Iowa State University, 2005.

Practical Type Inference Based on Success Typings

Tobias Lindahl and Konstantinos Sagonas International Symposium on Principles and Practice of Declarative Programming (PPDP), 2006. http://www.it.uu.se/research/group/hipe/papers/succ_types.pdf

Type Systems for Gradual-typing

This work presents type systems for untyped languages, influenced by gradual typing work on interoperation, but doesn't explicitly deal with typed/untyped interoperation.

Practical Variable-Arity Polymorphism

T. Stephen Strickland, Sam Tobin-Hochstadt, and Matthias Felleisen.
European Symposium on Programming (ESOP), March 2009.

Static Type Inference for Ruby

Michael Furr, Jong-hoon (David) An, Jeffrey S. Foster, and Michael Hicks
In Object-Oriented Program Languages and Systems (OOPS) Track at ACM Symposium on Applied Computing (SAC), pages 1859–1866, Honolulu, Hawaii, March 2009.

Tests to the Left of Me, Types to the Right: How Not to Get Stuck in the Middle of a Ruby Execution (A Demo of Diamondback Ruby)

Michael Furr, Jong-hoon (David) An, Jeffrey S. Foster, and Michael Hicks
In 1st International Workshop on Script to Program Evolution (STOP), Genova, Italy, July 2009.

Profile-Guided Static Typing for Dynamic Scripting Languages

Michael Furr, Jong-hoon (David) An, and Jeffrey S. Foster
In ACM SIGPLAN International Conference on Object-Oriented Programming, Systems, Languages and Applications (OOPSLA), pages 283–300, Orlando, Floria, October 2009.

Work In Progress: an Empirical Study of Static Typing in Ruby

Mark T. Daly, Vibha Sazawal, and Jeffrey S. Foster
In Workshop on Evaluation and Usability of Programming Languages and Tools (PLATEAU), Orlando, Florida, October 2009.

Static Typing for Ruby on Rails

Jong-hoon (David) An, Avik Chaudhuri, and Jeffrey S. Foster
In IEEE/ACM International Conference on Automated Software Engineering (ASE), pages 590–594, Auckland, New Zealand, November 2009. Short paper.

Logical Types for Untyped Languages

Sam Tobin-Hochstadt and Matthias Felleisen
International Conference on Functional Programming (ICFP), September 2010.

Dynamic Inference of Static Types for Ruby

Jong-hoon (David) An, Avik Chaudhuri, Jeffrey S. Foster, and Michael Hicks
In ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages (POPL), pages 459–472, Austin, TX, USA, January 2011.

Position Paper: Dynamically Inferred Types for Dynamic Languages

Jong-hoon (David) An, Avik Chaudhuri, Jeffrey S. Foster, and Michael Hicks
In 2nd International Workshop on Script to Program Evolution (STOP), Austin, TX, USA, January 2011.

Typing the Numeric Tower

Vincent St-Amour, Sam Tobin-Hochstadt, Matthew Flatt and Matthias Felleisen
Symposium on Practical Aspects of Declarative Languages (PADL), January 2012.

Nested Refinements: A Logic for Duck Typing

Ravi Chugh, Patrick M. Rondon, and Ranjit Jhala
In Proceedings of the ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages (POPL), pages 231-244, Philadelphia, PA, January 2012.

Status Report: Dependent Types for JavaScript

Ravi Chugh, David Herman, Ranjit Jhala STOP 2012 See subsequent OOPSLA paper.

Minigrace: A progress report

Michael Homer and James Noble
STOP 2012

Dependent Types for JavaScript

Ravi Chugh, David Herman, and Ranjit Jhala
In Proceedings of the ACM SIGPLAN Conference on Object-Oriented Programming, Systems, Languages, and Applications (OOPSLA), pages 587-606, Tucson, AZ, October 2012.

Progressive Types

Joe Gibbs Politz, Hannah Quay-de la Vallee, Shriram Krishnamurthi
In Proceedings of the ACM international symposium on New ideas, new paradigms, and reflections on programming and software (Onward! '12)
http://cs.brown.edu/~sk/Publications/Papers/Published/pqk-progressive-types/

A Practical Optional Type System for Clojure

Ambrose Bonnaire-Sergeant
Honours thesis, University of Western Australia, 2012 http://cloud.github.com/downloads/frenchy64/papers/ambrose-honours.pdf

Typed Lua: An Optional Type System for Lua

André Murbach Maidl, Fabio Mascarenhas, Roberto Ierusalimschy. Dyla 2014. http://www.lifl.fr/dyla14/papers/dyla14-4-typed-lua-an-optional-type-system.pdf

Practical Optional Types for Clojure

Ambrose Bonnaire-Sergeant, Rowan Davies, and Sam Tobin-Hochstadt.
In ESOP 2016: Proceedings of the 25th European Symposium on Programming Languages and Systems, volume 9632 of Lecture Notes in Computer Science, pages 68-94. Springer-Verlag, 2016.
http://frenchy64.github.io/papers/esop16-short.pdf

Occurrence Typing Modulo Theories

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