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Squirrel (programming language)

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Squirrel
ParadigmMulti-paradigm: scripting, imperative, functional, object-oriented
Designed byAlberto Demichelis
First appearedSeptember 6, 2003; 21 years ago (2003-09-06)
Stable release3.2 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. It is used extensively by Code::Blocks for scripting and was also used in Final Fantasy Crystal Chronicles: My Life as a King. 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.

Language features

Syntax

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;
      y = vargv;
      z = vargv;
    }
  }
  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

Applications using Squirrel

Games using Squirrel

History

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

See also

References

  1. "squirrel/HISTORY at master - albertodemichelis/squirrel - GitHub".
  2. MirthKit Developer Wiki Archived 2014-02-11 at the Wayback Machine
  3. ^ 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. ^ "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. Gothic 2 Online
  11. "iv-multiplayer.com". www.iv-multiplayer.com. Archived from the original on 2012-06-07. Retrieved 2018-07-06.
  12. "Liberty Unleashed". Retrieved 2019-12-04.
  13. "m2-multiplayer.com". www.m2-multiplayer.com. Archived from the original on 2013-01-02. Retrieved 2018-07-06.
  14. "undernightinbirth". GitHub. Retrieved 2024-08-18.
  15. "AI:Main Page - OpenTTD". wiki.openttd.org. Retrieved 2018-07-06.
  16. "Simutrans-Squirrel-API: Main Page". dwachs.github.io. Retrieved 2018-07-06.
  17. "The VG Resource Wiki". wiki.vg-resource.com. Retrieved 2021-09-04.
  18. "Thimbleweed Park Blog- Engine". blog.thimbleweedpark.com. Retrieved 2018-07-06.
  19. "NewDark 1.25: Squirrel script?". ttlg.com. 2017-03-20. Retrieved 2019-12-25.
  20. Vice City Multiplayer
  21. "Welcome To VC-MP website!". Archived from the original on 2006-04-05. Retrieved 2014-05-04.
  22. "undernightinbirth". GitHub. Retrieved 2024-08-18.
  23. "The Squirrel programming language". SourceForge. Retrieved 2018-07-06.
  24. "Moving to code.google.com and MIT License - The Language - Squirrel - The Programming Language". forum.squirrel-lang.org. Retrieved 2018-07-06.
  25. "Google Code Archive - Long-term storage for Google Code Project Hosting". code.google.com. Retrieved 2018-07-06.

External links

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