Editing Operator overloading (section)

==Catalog==
A classification of some common programming languages is made according to whether their operators are overloadable by the programmer and whether the operators are limited to a predefined set.

{| class="wikitable"
|-
! Operators
! Not overloadable
! Overloadable
|-
! New definable<ref>Completely new operators can be added.</ref>
| <!-- "Not overloadable" and "New operators definable" -->
*[[ML (programming language)|ML]]
*[[Pico (programming language)|Pico]]<ref>Binary functions with a symbolic name can be called infix.</ref>
*[[Prolog]]<ref>{{cite web |url=https://www.swi-prolog.org/pldoc/man?predicate=op/3 |title=Predicate op/3}}</ref>
|<!-- "Overloadable" and "New operators definable" -->
*[[ALGOL 68#op: Operators|ALGOL 68]]
*[[Clojure]]
*[[Eiffel (programming language)|Eiffel]]<ref>{{Cite web|title=Bertrand Meyer: Basic Eiffel language mechanisms|url=http://se.ethz.ch/~meyer/publications/online/eiffel/basic.html|access-date=2021-04-07|website=se.ethz.ch}}</ref>
*[[Fortran]]<ref>{{Cite web|title=Operator functions in F90|url=http://www.mathcs.emory.edu/~cheung/Courses/561/Syllabus/6-Fortran/operators.html|access-date=2021-04-07|website=www.mathcs.emory.edu}}</ref><ref>Introduced in Fortran 90.</ref>
*[[Futhark (programming language)|Futhark]]<ref>{{Cite web|title=3. Language Reference — Futhark 0.19.0 documentation|url=https://futhark.readthedocs.io/en/latest/language-reference.html|access-date=2020-10-10|website=futhark.readthedocs.io}}</ref>
*[[F Sharp (programming language)|F#]]<ref name="Smith2012">{{cite book |last=Smith |first=Chris |title=Programming F# 3.0: A Comprehensive Guide for Writing Simple Code to Solve Complex Problems |url=https://books.google.com/books?id=e0Wl6id4unQC&q=%22operator+overloading%22 |date=9 October 2012 |publisher=O'Reilly Media, Inc. |isbn=978-1-4493-2604-3}}</ref>
*[[Haskell (programming language)|Haskell]]<ref>[[Type class]]es instead of overloading.</ref>
*[[Io (programming language)|Io]]<ref>{{Cite web|title=io guide|url=https://iolanguage.org/guide/guide.html#Syntax-Operators|access-date=2021-04-07|website=iolanguage.org}}</ref>
*[[Julia (programming language)|Julia]]<ref>{{Cite web|title=Operator Overloading in Julia|url=https://www.geeksforgeeks.org/operator-overloading-in-julia/|access-date=2025-03-14
|website=geeksforgeeks.org}}</ref>
*[[Nim (programming language)|Nim]]<ref>{{cite web|title=Operators|url=https://nim-lang.github.io/Nim/tut1.html#procedures-operators}}</ref>
*[[R (programming language)|R]]<ref>{{Cite web|title=Operators - R in a Nutshell, 2nd Edition [Book]|url=https://www.oreilly.com/library/view/r-in-a/9781449358204/ch06s02.html|access-date=2021-04-07|website=www.oreilly.com|language=en}}</ref>
*[[Raku (programming language)|Raku]]<ref>{{cite web |url=https://docs.raku.org/language/optut |title=Creating operators}}</ref>
*[[Scala (programming language)|Scala]]<ref>{{cite web |url=https://docs.scala-lang.org/tour/operators.html |website=Tour of Scala |title=Operators}}</ref>
*[[Seed7]]<ref>{{Cite web|title=Seed7 Manual: Structured syntax definition|url=http://seed7.sourceforge.net/manual/syntax.htm|access-date=2020-09-29|website=seed7.sourceforge.net}}</ref>
*[[Smalltalk]]<ref name="Hunt2012">{{cite book |last=Hunt |first=John |title=Smalltalk and Object Orientation: An Introduction |url=https://books.google.com/books?id=BiDUBwAAQBAJ&q=overloading+operators |date=6 December 2012 |publisher=Springer Science & Business Media |isbn=978-1-4471-0961-7}}</ref>
*[[Swift (programming language)|Swift]]<ref>{{cite web |url=https://docs.swift.org/swift-book/LanguageGuide/AdvancedOperators.html |title=Swift: Advanced Operators}}</ref>
|-
! Limited set
|<!-- "Not overloadable" and "Limited set of operators" -->
*[[BASIC]]
*[[C (programming language)|C]]
*[[Go (programming language)|Go]]<ref>{{cite web |title=Why does Go not support overloading of methods and operators? |url=http://golang.org/doc/go_faq.html#overloading |access-date=4 September 2011}}</ref>
*[[Java (programming language)|Java]]
*[[JavaScript]]
*[[Modula-2]]
*[[Objective-C]]
*[[Pascal (programming language)|Pascal]]<ref>{{Cite web|title=Introduction|url=https://www.freepascal.org/docs-html/ref/refse101.html#x213-23500015.1|access-date=2020-09-30|website=freepascal.org}}</ref>
*[[TypeScript]]<ref>{{cite web |title=Operator Overloads |website=[[GitHub]] |url=https://github.com/Microsoft/TypeScript/issues/5407 |access-date=28 September 2018}}</ref>
*[[Visual Basic]]
|<!-- "Overloadable" and "Limited set of operators" -->
*[[Ada (programming language)|Ada]]<ref>{{cite web |url=https://www.adaic.org/resources/add_content/standards/05aarm/html/AA-6-6.html |website=Annotated Ada Reference Manual |title=6.6 Overloading of Operators}}</ref>
*[[C Sharp (programming language)|C#]]<ref name="DraytonAlbahari2003">{{cite book |last1=Drayton |first1=Peter |last2=Albahari |first2=Ben |last3=Neward |first3=Ted |title=C# in a Nutshell |url=https://books.google.com/books?id=bG_Aqb6iOUYC&q=%22operator+overloading%22 |year=2003 |publisher=O'Reilly Media, Inc. |isbn=978-0-596-00526-9}}</ref>
*[[C++]]<ref>{{cite web |url=https://en.cppreference.com/w/cpp/language/operators |title=C++ Operator Overloading}}</ref>
*[[Ceylon (programming language)|Ceylon]]<ref>{{Cite web|title=Eclipse Ceylon: Operator Polymorphism|url=https://ceylon-lang.org/documentation/1.3/reference/operator/operator-polymorphism/|access-date=2021-04-07|website=ceylon-lang.org}}</ref>
*[[D (programming language)|D]]<ref>{{Cite web|title=Operator Overloading - D Programming Language|url=https://dlang.org/spec/operatoroverloading.html|access-date=2020-10-10|website=dlang.org}}</ref>
*[[Dart (programming language)|Dart]]<ref>{{Cite web|title=A tour of the Dart language|url=https://dart.dev/guides/language/language-tour|access-date=2020-09-30|website=dart.dev}}</ref>
*[[FreeBASIC]]<ref>{{Cite web|title=Operator Overloading|url=http://bourabai.kz/einf/freebasic/ProPgOperatorOverloading.html|access-date=2021-04-07|website=bourabai.kz}}</ref>
*[[Groovy (programming language)|Groovy]]<ref>{{Cite web|title=The Apache Groovy programming language - Operators|url=https://groovy-lang.org/operators.html#Operator-Overloading|access-date=2020-09-30|website=groovy-lang.org}}</ref>
*[[Kotlin (programming language)|Kotlin]]<ref>{{cite web |title=Operator overloading |url=https://kotlinlang.org/docs/reference/operator-overloading.html |website=Kotlin |access-date=24 June 2018}}</ref>
*[[Lua (programming language)|Lua]]<ref>{{cite web |url=http://lua-users.org/wiki/MetamethodsTutorial |title=Metamethods Tutorial |website=Lua-users Wiki}}</ref>
*[[MATLAB]]<ref>{{cite web |title=Implementing Operators for Your Class |url=http://www.mathworks.com/help/matlab/matlab_oop/implementing-operators-for-your-class.html |access-date=1 October 2013}}</ref>
*[[Object Pascal]] ([[Free Pascal]],<ref>{{cite web |title=Operator Overloading |website=Free Pascal Manual |url=http://www.freepascal.org/docs-html/ref/refch15.html |access-date=1 December 2014}}</ref> [[Delphi (programming language)|Delphi]] (since 2005)<ref>{{cite web |title=Operator Overloading |website=Delphi Manual |url=http://docwiki.embarcadero.com/RADStudio/XE4/en/Operator_Overloading_%28Delphi%29 |access-date=1 December 2014}}</ref>)
*[[PHP]] (using magic methods,<ref>{{cite web |title=PHP magic methods overriding class properties |url=http://webwidetutor.com/php/php-oop-Magic-Methods-tutorial-?id=30 |access-date=7 April 2015 |archive-url=https://web.archive.org/web/20160304050243/http://webwidetutor.com/php/php-oop-Magic-Methods-tutorial-?id=30 |archive-date=4 March 2016}}</ref> ArrayAccess interface, or Operator extension)
*[[Perl]]<ref name="Orwant2002">{{cite book |last=Orwant |first=Jon |title=Computer Science & Perl Programming: Best of The Perl Journal |url=https://books.google.com/books?id=8TkEOyBHoOoC&q=%22operator+overloading%22&pg=PA347 |date=4 November 2002 |publisher=O'Reilly Media, Inc. |isbn=978-0-596-00310-4 |pages=347–}}</ref>
*[[Python (programming language)|Python]]<ref>{{cite web |url=https://docs.python.org/3/reference/datamodel.html |website=The Python Language Reference |title=3. Data Model}}</ref>
*[[Ruby (programming language)|Ruby]]<ref>{{cite web |url=https://www.ruby-lang.org/en/documentation/faq/7/ |website=Official Ruby FAQ |title=Methods}}</ref>
*[[Rust (programming language)|Rust]]<ref>{{cite web |url=https://doc.rust-lang.org/stable/rust-by-example/trait/ops.html |website=Rust By Example |title=Operator Overloading}}</ref>
*[[Visual Basic .NET]]<ref>{{cite web|title=How to: Define an Operator (Visual Basic)|date=15 September 2021 |url=https://docs.microsoft.com/en-us/dotnet/visual-basic/programming-guide/language-features/procedures/how-to-define-an-operator}}</ref>
|}