assignment destructuring

[francescoagati]

What you think about assignment destructuring in tink_lang?

for arrays for example

      var x = 1;
      var y = 2;
      var z = 3;
      [a,b,c] = [x,y,z];
become
      var a = x;
      var b = y;
      var c = z;

and object destructuring

      var person = {name:'mario',surname:'rossi',age:25};
      [name,surname] << person;
become
      var name = person.name;
      var surname = person.surname;

[francescoagati]

This is the code for make the test

import haxe.macro.Expr;
using haxe.macro.ExprTools;
using haxe.macro.MacroStringTools;

class Main {

  static function processDestructuring(e:Expr) {
    return switch e {
      case macro [$a{lefts}] = [$a{rights}]:
        var cnt = 0;
        var blocks = [ for (left in lefts) {
             var valueLeft = left.toString();
             var right = rights[cnt];
            cnt++;
            macro var $valueLeft = $e{right};
        }];
        macro $b{blocks};
      case macro [$a{lefts}] << ${right}: {
        var cnt = 0;
        var blocks = [ for (left in lefts) {
            var valueLeft = left.toString();
            cnt++;
            macro var $valueLeft = $right.$valueLeft;
        }];
        macro $b{blocks};
      }
      case _:e.map(processDestructuring);
    }
  }

  public static macro function testDestructuring(e:Expr) {
    return e.map(processDestructuring);
  }

  public static function main() {
    testDestructuring({
      var x = 1;
      var y = 2;
      var z = 3;
      var person = {name:'mario',surname:'rossi',age:25};
      trace(person);

      [name,surname] << person;
      [a,b,c] = [x,y,z];
    });
  }

}

and the code generated for js

(function (console) { "use strict";
var HxOverrides = function() { };
HxOverrides.iter = function(a) {
    return { cur : 0, arr : a, hasNext : function() {
        return this.cur < this.arr.length;
    }, next : function() {
        return this.arr[this.cur++];
    }};
};
var Main = function() { };
Main.main = function() {
    var x = 1;
    var y = 2;
    var z = 3;
    var person = { name : "mario", surname : "rossi", age : 25};
    console.log(person);
    var name = person.name;
    var surname = person.surname;
    var a = x;
    var b = y;
    var c = z;
};
Main.main();
})(typeof console != "undefined" ? console : {log:function(){}});