Squirrel (programming language)

Squirrel
ParadigmMulti-paradigm: scripting, imperative, functional, object-oriented
Designed byAlberto Demichelis
First appearedSeptember 6, 2003; 21 years ago (2003-09-06)
Stable release
3.2[1] Edit this on Wikidata / 10 February 2022; 2 years ago (10 February 2022)
Typing disciplineDynamic
OSCross-platform
LicenseMIT license
Filename extensions.nut
Websitesquirrel-lang.org Edit this at Wikidata
Influenced by
C++, JavaScript, Lua, Python
Influenced
MiniD

Squirrel is a high level imperative, object-oriented programming language, designed to be a lightweight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games.

MirthKit, a simple toolkit for making and distributing open source, cross-platform 2D games, uses Squirrel for its platform.[2] It is used extensively by Code::Blocks for scripting and was also used in Final Fantasy Crystal Chronicles: My Life as a King.[3][4] It is also used in Left 4 Dead 2, Portal 2 and Thimbleweed Park for scripted events and in NewDark, an unofficial Thief 2: The Metal Age engine update, to facilitate additional, simplified means of scripting mission events, aside of the regular C scripting.[5]

Language features

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Syntax

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Squirrel uses a C-like syntax, albeit inspired by that of Lua as well.

Factorial in Squirrel
local function factorial(x) // Getting function which is factorial, then getting value which is x {   if (x <= 1) {  // if x is less than 1     return 1;  // then the code will just return 1   }   else { // if that doesn't work     return x * factorial(x-1); // then the code will return x times factorial(x-1)   } } 
Generators
function not_a_random_number_generator(max) {   local last = 42;   local IM = 139968;   local IA = 3877;   local IC = 29573;   for(;;) { // loops forever     yield (max * (last = (last * IA + IC) % IM) / IM);   } }  local randtor = not_a_random_number_generator(100);  for(local i = 0; i < 10; i += 1)    print(">"+resume randtor+"\n"); 
Classes and inheritance
class BaseVector {   constructor(...)   {     if(vargv.len() >= 3) {       x = vargv[0];       y = vargv[1];       z = vargv[2];     }   }   x = 0;   y = 0;   z = 0; }  class Vector3 extends BaseVector {   function _add(other)   {     if(other instanceof ::Vector3)       return ::Vector3(x+other.x,y+other.y,z+other.z);     else       throw "wrong parameter";   }   function Print()   {     ::print(x+","+y+","+z+"\n");   } }  local v0 = Vector3(1,2,3) local v1 = Vector3(11,12,13) local v2 = v0 + v1; v2.Print(); 

Applications

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Applications using Squirrel

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Games using Squirrel

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History

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The language was made public in 2003 under the zlib/libpng license.[22] In November 2010, the license was changed to the MIT license to enable the project to be hosted on Google Code.[23][24] It is developed and maintained by Alberto Demichelis.

See also

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References

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  1. ^ "squirrel/HISTORY at master - albertodemichelis/squirrel - GitHub".
  2. ^ MirthKit Developer Wiki Archived 2014-02-11 at the Wayback Machine
  3. ^ a b Brandon Boyer (21 February 2008). "Gamasutra - GDC 2008 Event Coverage". gamasutra.com. Gamasutra.
  4. ^ "Exclusive: Behind The Scenes of Final Fantasy's WiiWare Debut". gamasutra.com. Gamasutra. 23 June 2008. Retrieved 22 September 2011.
  5. ^ "L4D2 Vscripts - Valve Developer Community". developer.valvesoftware.com. Retrieved 2018-07-06.
  6. ^ "Electric Imp programming guide". electricimp.com.
  7. ^ a b c d e f g h "VScript". valvesoftware.com. 2014-08-20. Retrieved 2015-01-17.
  8. ^ "th155-decomp". GitHub. Retrieved 2020-10-19.
  9. ^ "WHAT in the hell, is consumable nut? Please help this is an error code I got, have any of you got this before?". reddit.com. 2019-03-24. Retrieved 2021-09-04.
  10. ^ "iv-multiplayer.com". www.iv-multiplayer.com. Archived from the original on 2012-06-07. Retrieved 2018-07-06.
  11. ^ "Liberty Unleashed". Retrieved 2019-12-04.
  12. ^ "m2-multiplayer.com". www.m2-multiplayer.com. Archived from the original on 2013-01-02. Retrieved 2018-07-06.
  13. ^ "undernightinbirth". GitHub. Retrieved 2024-08-18.
  14. ^ "AI:Main Page - OpenTTD". wiki.openttd.org. Retrieved 2018-07-06.
  15. ^ "Simutrans-Squirrel-API: Main Page". dwachs.github.io. Retrieved 2018-07-06.
  16. ^ "The VG Resource Wiki". wiki.vg-resource.com. Retrieved 2021-09-04.
  17. ^ "Thimbleweed Park Blog- Engine". blog.thimbleweedpark.com. Retrieved 2018-07-06.
  18. ^ "NewDark 1.25: Squirrel script?". ttlg.com. 2017-03-20. Retrieved 2019-12-25.
  19. ^ Vice City Multiplayer
  20. ^ "Welcome To VC-MP website!". Archived from the original on 2006-04-05. Retrieved 2014-05-04.
  21. ^ "undernightinbirth". GitHub. Retrieved 2024-08-18.
  22. ^ "The Squirrel programming language". SourceForge. Retrieved 2018-07-06.
  23. ^ "Moving to code.google.com and MIT License - The Language - Squirrel - The Programming Language". forum.squirrel-lang.org. Retrieved 2018-07-06.
  24. ^ "Google Code Archive - Long-term storage for Google Code Project Hosting". code.google.com. Retrieved 2018-07-06.
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