initLocals macro

Main.hx

class Main {

	var arg1:Int;
	var arg2:String;
	var arg3:Bool;
	
	function new(arg1 = 0, arg2 = "foo", arg3 = false) {
		MyMacro.initLocals();
	}
	
	static public function main() {
		var m = new Main();
		trace(m.arg1, m.arg2, m.arg3);
	}
}

MyMacro.hx

import haxe.macro.Expr;
import haxe.macro.Context;

using Lambda;

class MyMacro {
	macro static public function initLocals() {
		var locals = Context.getLocalVars();
		var fields = Context.getLocalClass().get().fields.get();
		var exprs = [];
		for (local in locals.keys()) {
			if (fields.exists(function(field) return field.name == local)) {
				exprs.push(macro this.$local = $i{local});
			}
		}
		var eInit = macro $b{exprs};
		return eInit;
	}
}

My way: https://github.com/AxGord/Pony/blob/haxe3/pony/time/DTimer.hx#L49
https://github.com/AxGord/Pony/blob/haxe3/pony/magic/Declarator.hx#L62
Can be used if need init not all args, and help if class have many arguments.