JSIL Code Sample: Closures

DisplayClassFieldNames.cs

using System;

public static class Program {
    public static void Main (string[] args) {
        int x = 1;
        string y = "y";

        Func<string> a = () => {
            return String.Format("x={0}, y={1}", x, y);
        };

        Console.WriteLine("a()={0}", a());
    }
}

DisplayClassFieldNames.js

JSIL.MakeStaticClass("Program", true, [], function ($) {

  $.Method({Static:true , Public:true }, "Main", 
    $sig.get(1, null, [$jsilcore.TypeRef("System.Array", [$.String])], []), 
    function Main (args) {
      var $l$gc__DisplayClass = new $asm00.Program_$l$gc__DisplayClass1();
      $l$gc__DisplayClass.x = 1;
      $l$gc__DisplayClass.y = "y";
      var a = function () {
        return $asm01.System.String.Format("x={0}, y={1}", this.x, this.y);
      }.bind($l$gc__DisplayClass);
      $asm01.System.Console.WriteLine("a()={0}", a());
    }
  );

});

JSIL.MakeClass($asm01.TypeRef("System.Object"), "Program/<>c__DisplayClass1", false, [], function ($) {

  $.Method({Static:false, Public:true }, ".ctor", 
    $sig.get(2, null, [], []), 
    function _ctor () {
    }
  );

  $.Field({Static:false, Public:true }, "x", $.Int32, function ($) {
      return 0;
    });

  $.Field({Static:false, Public:true }, "y", $.String, function ($) {
      return null;
    });

});