Haxe 3.3.0-rc.1 Abstract @:resolve and @:op(a.b) metadata simplified examples.

Main.hx

package;

import haxe.macro.Expr;

class Main {
	
	static function main() {
		
		var smap:StringMap = ['firstName' => 'Skial', 'lastName' => 'Bainn'];
		trace( smap.lastName, smap.firstName ); // Bainn, Skial
		
		var mmap:MacroMap = cast smap;
		trace( mmap.lastName, mmap.firstName ); // Bainn, Skial
		
	}
	
}


abstract StringMap(Map<String, String>) from Map<String, String> {
	
	@:resolve
	private inline function resolve(name:String) {
		return this.get( name );
	}
	
}

abstract MacroMap(Map<String, String>) from Map<String, String> {
	
	@:op(a.b)
	private static macro function resolve(ethis:Expr, name:String) {
		var result = switch (name) {
			case 'firstName': 'Skial';
			case 'lastName': 'Bainn';
			case _: '';
		}
		return macro $v { result };
	}
	
	
}

main.js

// Generated by Haxe 3.3.0
(function () { "use strict";
var Main = function() { };
Main.__name__ = true;
Main.main = function() {
	var _g = new haxe_ds_StringMap();
	if(__map_reserved.firstName != null) {
		_g.setReserved("firstName","Skial");
	} else {
		_g.h["firstName"] = "Skial";
	}
	if(__map_reserved.lastName != null) {
		_g.setReserved("lastName","Bainn");
	} else {
		_g.h["lastName"] = "Bainn";
	}
	var smap = _g;
	var _this = smap;
	var tmp = __map_reserved.lastName != null?_this.getReserved("lastName"):_this.h["lastName"];
	var _this1 = smap;
	haxe_Log.trace(tmp,{ fileName : "Main.hx", lineNumber : 10, className : "Main", methodName : "main", customParams : [__map_reserved.firstName != null?_this1.getReserved("firstName"):_this1.h["firstName"]]});
	haxe_Log.trace("Bainn",{ fileName : "Main.hx", lineNumber : 13, className : "Main", methodName : "main", customParams : ["Skial"]});
};
Main.main();
})();