Fantom is an actively used programming language created in 2005. Fantom is a general purpose object-oriented programming language created by Brian and Andy Frank that runs on the Java Runtime Environment (JRE), JavaScript, and the .NET Common Language Runtime (CLR) (.NET support is considered "prototype" status). Its primary design goal is to provide a standard library API that abstracts away the question of whether the code will ultimately run on the JRE or CLR. Like C# and Java, Fantom uses a curly brace syntax. Read more on Wikipedia...

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Example code from Linguist:

/*
 * Author: Robert Koeninger
 * License: WTFPL (http://www.wtfpl.net/)
 */

mixin Expr
{
  abstract Obj? eval()
}

class Constant : Expr
{
  Obj? value

  new make(Obj? value) { this.value = value }
  override Obj? eval() { value }
}

enum class Op
{
  plus,
  minus
}

class Infix : Expr
{
  Op op
  Expr left
  Expr right

  new make(Op op, Expr left, Expr right)
  {
    this.op = op
    this.left = left
    this.right = right
  }

  override Obj? eval()
  {
    switch (op)
    {
      case Op.plus:
        return (Int)left.eval() + (Int)right.eval()
      case Op.minus:
        return (Int)left.eval() - (Int)right.eval()
      default:
        throw Err("undefined Op")
    }
  }
}

Example code from Wikipedia:

// Hello from Fantom!
class HelloWorld
{
  static Void main()
  {
    echo("Hello, World!")
  }
}

Last updated July 22nd, 2019