Squirrel (programming language)

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Squirrel
ParadigmMulti-paradigm: scripting, imperative, functional, object-oriented
Designed byAlberto Demichelis
First appearedSeptember 6, 2003; 18 years ago (2003-09-06)
Stable release
3.2[1] Edit this on Wikidata / 10 February 2022; 6 months 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[edit]

Syntax[edit]

Squirrel uses a C-like syntax.

Factorial in Squirrel
  function factorial(x)
  {
    if (x <= 1) {
      return 1;
    }
    else {
      return x * 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[edit]

Applications using Squirrel[edit]

Games using Squirrel[edit]

History[edit]

The language was made public in 2003 under the zlib/libpng license.[20] In November 2010, the license was changed to the MIT license to enable the project to be hosted on Google Code.[21][22] It is developed and maintained by Alberto Demichelis.

See also[edit]

References[edit]

  1. ^ https://github.com/albertodemichelis/squirrel/blob/master/HISTORY.
  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 "VScript". valvesoftware.com. 2014-08-20. Retrieved 2015-01-17.
  8. ^ "NewDark 1.25: Squirrel script?". ttlg.com. 2017-03-20. Retrieved 2019-12-25.
  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. ^ "AI:Main Page - OpenTTD". wiki.openttd.org. Retrieved 2018-07-06.
  11. ^ "iv-multiplayer.com". www.iv-multiplayer.com. Archived from the original on 2012-06-07. Retrieved 2018-07-06.
  12. ^ "m2-multiplayer.com". www.m2-multiplayer.com. Archived from the original on 2013-01-02. Retrieved 2018-07-06.
  13. ^ "The VG Resource Wiki". wiki.vg-resource.com. Retrieved 2021-09-04.
  14. ^ "Thimbleweed Park Blog- Engine". blog.thimbleweedpark.com. Retrieved 2018-07-06.
  15. ^ "Simutrans-Squirrel-API: Main Page". dwachs.github.io. Retrieved 2018-07-06.
  16. ^ Vice City Multiplayer
  17. ^ "Welcome To VC-MP website!". Archived from the original on 2006-04-05. Retrieved 2014-05-04.
  18. ^ "Liberty Unleashed". Retrieved 2019-12-04.
  19. ^ "th155-decomp". GitHub. Retrieved 2020-10-19.
  20. ^ "The Squirrel programming language". SourceForge. Retrieved 2018-07-06.
  21. ^ "Moving to code.google.com and MIT License - The Language - Squirrel - The Programming Language". forum.squirrel-lang.org. Retrieved 2018-07-06.
  22. ^ "Google Code Archive - Long-term storage for Google Code Project Hosting". code.google.com. Retrieved 2018-07-06.

External links[edit]