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

class Main {
    macro static function typeName(t:haxe.macro.Expr) {
        return macro $v{(new Printer()).printComplexType(Context.toComplexType(Context.typeof(t)))};
    }
    static function main() {
        trace(typeName(Main)); // Main.#Main
    }
}

generated JS (to ensure its all done compile time):

(function () { "use strict";
var Main = function() { }
Main.main = function() {
    console.log("Main.#Main");
}
Main.main();
})();