Demonstration of blatantly copying fields to a new type not working...

build.hxml

-main Main
-neko Main.n

MacroTest.hx

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

class MacroTest
{
	macro public function build():Array<Field>
	{
		trace ("Build macro");

		var localClass = Context.getLocalClass().get();
		var fields = Context.getBuildFields();

		Context.defineType({
			pos: localClass.pos,
			params: [],
			pack: ["my","pack"],
			name: "MacroBuiltClass",
			meta: [],
			kind: TDClass(),
			isExtern: false,
			fields: fields
		});

		return fields;
	}
}

Main.hx

import haxe.ds.*;

@:build(MacroTest.build())
class Main
{
	static function main()
	{
		var s = new StringMap();
		trace (s);

		var i = new IntMap();
		trace (i);

		my.pack.MacroBuiltClass.printSomething();
	}

	public static function printSomething()
	{
		trace ("Something");
	}
}