PureScript: Difference between revisions
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{{Infobox programming language | |||
| name = PureScript | |||
| logo = PureScript Logo.png | |||
| paradigm = [[Functional programming|Functional]] | |||
| year = 2013 | |||
| latest release version = 0.13.0 | |||
| latest release date = {{Start date and age|2019|05|30}} | |||
| influenced_by = [[Elm (programming language)|Elm]], [[F Sharp (programming language)|F#]], [[Haskell (programming language)|Haskell]], [[Koka (programming language)|Koka]], [[OCaml]], [[Roy (programming language)|Roy]], [[Standard ML]] | |||
| typing = [[static typing|Static]], [[strong typing|Strong]], [[type inference|Inferred]] | |||
| designer = Phil Freeman | |||
| website = [http://www.purescript.org www.purescript.org] | |||
| license = [[Permissive license|Permissive]] ([[Modified BSD License]])<ref name=license>{{cite web|url=https://github.com/purescript/purescript/blob/master/LICENSE|title=purescript/purescript|website=GitHub}}</ref> | |||
| file_ext = .purs | |||
}} | |||
PureScript is a [[strongly-typed]], [[Purely_functional_programming|purely-functional]] [[programming language]] that compiles to [[JavaScript]]. It can be used to develop web applications, server side apps, and also desktop applications with use of [[Electron (software framework)|Electron]]. Its syntax is mostly comparable to that of [[Haskell (programming language)|Haskell]]. In addition, it introduces [[row polymorphism]] and extensible records.<ref>{{Cite web|url=http://www.purescript.org/|title=PureScript|website=www.purescript.org|access-date=2019-03-14}}</ref> Also, contrary to Haskell, PureScript adheres to a strict [[Evaluation strategy|evaluation strategy]]. | |||
== History == | |||
PureScript was initially designed by Phil Freeman in 2013. He started to work on PureScript as various attempts to compile Haskell to JavaScript while preserving its semantics (e.g. using Fay, Haste, or GHCJS) didn't work to his satisfaction.<ref>{{Cite web|url=https://leanpub.com/purescript/read#leanpub-auto-about-the-author|title=Read PureScript by Example {{!}} Leanpub|website=leanpub.com|access-date=2019-03-14}}</ref> | |||
Since then it has been picked up by the community and is developed on [[GitHub]]. Additional core tools developed by the community include the dedicated build tool "Pulp"<ref>{{Citation|title=A build tool for PureScript projects|date=2019-03-08|url=https://github.com/purescript-contrib/pulp|publisher=PureScript Contrib|access-date=2019-03-14}}</ref>, the documentation directory "Pursuit"<ref>{{Cite web|url=https://pursuit.purescript.org/|title=Pursuit|website=pursuit.purescript.org|access-date=2019-03-14}}</ref>, and the package manager "Spago"<ref>{{Citation|title=🍝 PureScript package manager and build tool powered by Dhall and package-sets: spacchetti/spago|date=2019-03-14|url=https://github.com/spacchetti/spago|publisher=spacchetti|access-date=2019-03-14}}</ref> | |||
== Features == | |||
PureScript features [[Eager_evaluation|strict evaluation]], [[persistent data structures]] and [[type inference]]. The PureScript type system shares many features with those of similar functional languages like [[Haskell (programming language)|Haskell]]: [[Algebraic data type|algebraic data types]] and [[Pattern matching|pattern matching]], [[Higher-kinded type|higher kinded types]], [[Type class|type classes]] and [[Type_class#Functional_dependencies|functional dependencies]], and [[Higher-rank polymorphism|higher-rank polymorphism]]. PureScript's type system adds support for [[Row polymorphism|row polymorphism]] and extensible records.<ref>{{Citation|title=Documentation for the PureScript language, compiler, and tools.: purescript/documentation|date=2019-03-14|url=https://github.com/purescript/documentation|publisher=PureScript|access-date=2019-03-14}}</ref> However, PureScript lacks support for some of the more advanced features of Haskell like [[Generalized_algebraic_data_type|GADTs]] and [[Type_family|type families]]. | |||
The PureScript compiler attempts to produce readable JavaScript code, where possible. Through a simple FFI interface it also allows the reuse of existing JavaScript code.<ref>{{Citation|title=Documentation for the PureScript language, compiler, and tools.: purescript/documentation|date=2019-03-14|url=https://github.com/purescript/documentation|publisher=PureScript|access-date=2019-03-14}}</ref> | |||
PureScript supports [[incremental compilation]], and the compiler distribution includes support for building [[source code editor]] plugins for iterative development<ref>{{Citation|title=purs ide: Editor and tooling support for the PureScript programming language|date=2019-04-21|url=https://github.com/purescript/purescript/tree/dfbd19da85c92d82ed4c3184f950f74da5332e3f/psc-ide|access-date=2019-04-21}}</ref>. Editor plugins exist for many popular text editors, including [[Vim_(text_editor)|Vim]], [[Emacs]], [[Sublime Text]], [[Atom_(text_editor)|Atom]] and [[Visual Studio Code]]. | |||
== Code Examples == | |||
Here is a minimal [["Hello, World!" program|"Hello world" program]] in PureScript:<syntaxhighlight lang="haskell" line="1"> | |||
module Main where | |||
import Effect.Console (log) | |||
main = log "Hello World!" | |||
</syntaxhighlight> | |||
Here, the type of the program is inferred and checked by the PureScript compiler. A more verbose version of the same program might include explicit type annotations:<syntaxhighlight lang="haskell" line="1"> | |||
module Main where | |||
import Prelude | |||
import Effect (Effect) | |||
import Effect.Console (log) | |||
main :: Effect Unit | |||
main = log "Hello World!" | |||
</syntaxhighlight> | |||
== See also == | |||
{{Portal|Free and open-source software}} | |||
* [[Elm_(programming_language)|Elm]]: A domain-specific programming language for declaratively creating web browser-based graphical user interfaces | |||
* [[TypeScript]]: A strongly-typed programming language that transpiles to JavaScript | |||
== References == | |||
{{Reflist|2}} | |||
== External links == | |||
* [http://www.purescript.org www.purescript.org] | |||
{{Programming languages}} | |||
[[Category:Functional languages]] | |||
[[Category:Pattern matching programming languages]] | |||
[[Category:Programming languages created in 2013]] | |||
[[Category:Statically typed programming languages]] | |||
[[Category:2013 software]] | |||
{{Source Wikipedia}} | |||
{{Kept on Wikipedia|Biggest version}} | |||
Latest revision as of 22:52, 18 January 2025
 | |
| Paradigm | Functional |
|---|---|
| Designed by | Phil Freeman |
| First appeared | 2013 |
| Stable release | 0.13.0
/ May 30, 2019 |
| Typing discipline | Static, Strong, Inferred |
| License | Permissive (Modified BSD License)[1] |
| Filename extensions | .purs |
| Website | www.purescript.org |
| Influenced by | |
| Elm, F#, Haskell, Koka, OCaml, Roy, Standard ML | |
Search PureScript on Amazon.
PureScript is a strongly-typed, purely-functional programming language that compiles to JavaScript. It can be used to develop web applications, server side apps, and also desktop applications with use of Electron. Its syntax is mostly comparable to that of Haskell. In addition, it introduces row polymorphism and extensible records.[2] Also, contrary to Haskell, PureScript adheres to a strict evaluation strategy.
History
PureScript was initially designed by Phil Freeman in 2013. He started to work on PureScript as various attempts to compile Haskell to JavaScript while preserving its semantics (e.g. using Fay, Haste, or GHCJS) didn't work to his satisfaction.[3]
Since then it has been picked up by the community and is developed on GitHub. Additional core tools developed by the community include the dedicated build tool "Pulp"[4], the documentation directory "Pursuit"[5], and the package manager "Spago"[6]
Features
PureScript features strict evaluation, persistent data structures and type inference. The PureScript type system shares many features with those of similar functional languages like Haskell: algebraic data types and pattern matching, higher kinded types, type classes and functional dependencies, and higher-rank polymorphism. PureScript's type system adds support for row polymorphism and extensible records.[7] However, PureScript lacks support for some of the more advanced features of Haskell like GADTs and type families.
The PureScript compiler attempts to produce readable JavaScript code, where possible. Through a simple FFI interface it also allows the reuse of existing JavaScript code.[8]
PureScript supports incremental compilation, and the compiler distribution includes support for building source code editor plugins for iterative development[9]. Editor plugins exist for many popular text editors, including Vim, Emacs, Sublime Text, Atom and Visual Studio Code.
Code Examples
Here is a minimal "Hello world" program in PureScript:
module Main where
import Effect.Console (log)
main = log "Hello World!"
Here, the type of the program is inferred and checked by the PureScript compiler. A more verbose version of the same program might include explicit type annotations:
module Main where
import Prelude
import Effect (Effect)
import Effect.Console (log)
main :: Effect Unit
main = log "Hello World!"
See also
- Elm: A domain-specific programming language for declaratively creating web browser-based graphical user interfaces
- TypeScript: A strongly-typed programming language that transpiles to JavaScript
References
- ↑ "purescript/purescript". GitHub.
- ↑ "PureScript". www.purescript.org. Retrieved 2019-03-14.
- ↑ "Read PureScript by Example | Leanpub". leanpub.com. Retrieved 2019-03-14.
- ↑ A build tool for PureScript projects, PureScript Contrib, 2019-03-08, retrieved 2019-03-14
- ↑ "Pursuit". pursuit.purescript.org. Retrieved 2019-03-14.
- ↑ 🍝 PureScript package manager and build tool powered by Dhall and package-sets: spacchetti/spago, spacchetti, 2019-03-14, retrieved 2019-03-14
- ↑ Documentation for the PureScript language, compiler, and tools.: purescript/documentation, PureScript, 2019-03-14, retrieved 2019-03-14
- ↑ Documentation for the PureScript language, compiler, and tools.: purescript/documentation, PureScript, 2019-03-14, retrieved 2019-03-14
- ↑ purs ide: Editor and tooling support for the PureScript programming language, 2019-04-21, retrieved 2019-04-21
External links
This article "PureScript" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:PureScript. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
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This page exists already on Wikipedia. |
