Squirrel - Programming language

Squirrel is an open source programming language created in 2003 by Alberto Demichelis.

#152on PLDB

21Years Old

2kRepos

Download source code:

git clone https://github.com/albertodemichelis/squirrel

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Squirrel is a high level imperative, object-oriented programming language, designed to be a light-weight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games and hardware such as Electric Imp. 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. Read more on Wikipedia...

Tags: programming language
Squirrel is developed on GitHub and has 895 stars
There are at least 1,513 Squirrel repos on GitHub
Early development of Squirrel happened in https://sourceforge.net/p/squirrel/bugs
Squirrel is written in reStructuredText, C++, Squirrel, Make, CMake, C, YAML, Python
The Google BigQuery Public Dataset GitHub snapshot shows 284 users using Squirrel in 433 repos on GitHub
There are 42 Project Euler users using Squirrel
Explore Squirrel snippets on Rosetta Code
Squirrel appears in the TIOBE Index
Squirrel Ubuntu package
GitHub supports syntax highlighting for Squirrel
Squirrel appears in the Quine Relay project
squirrel-lang.org was registered in 2005
See also: (5 related languages) JavaScript, Lua, Python, MiniD, Ruby
2 PLDB concepts link to Squirrel: cloc, Squirrel

Example from Riju:

print("Hello, world!\n")

Example from hello-world:

print("Hello World");

Example from the Hello World Collection:

#!/usr/bin/squirrelsh
// Hello world in Squirrel
printl("Hello, world!");

Example from Linguist:

//example from http://www.squirrel-lang.org/#documentation

local table = {
	a = "10"
	subtable = {
		array = [1,2,3]
	},
	[10 + 123] = "expression index"
}
 
local array=[ 1, 2, 3, { a = 10, b = "string" } ];
 
foreach (i,val in array)
{
	::print("the type of val is"+typeof val);
}
 
/////////////////////////////////////////////
 
class Entity
{
	constructor(etype,entityname)
	{
		name = entityname;
		type = etype;
	}
									
	x = 0;
	y = 0;
	z = 0;
	name = null;
	type = null;
}
 
function Entity::MoveTo(newx,newy,newz)
{
	x = newx;
	y = newy;
	z = newz;
}
 
class Player extends Entity {
	constructor(entityname)
	{
		base.constructor("Player",entityname)
	}
	function DoDomething()
	{
		::print("something");
	}
	
}
 
local newplayer = Player("da playar");
 
newplayer.MoveTo(100,200,300);

Example from Wikipedia:

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();

Language features

Feature	Supported	Example	Token
Strings	✓	"Hello world"	"
Print() Debugging	✓		print
Line Comments	✓	// A comment	//
Comments	✓
Semantic Indentation	X