Haxe Macro | Access build field doc

Build.hx

package uhu.macro.doc;
import haxe.macro.Context;
import haxe.macro.Expr;
import neko.io.File;
import neko.io.FileOutput;

/**
 * ...
 * @author Skial Bainn
 */

class Build {
	
	public static var file:FileOutput;

	@:macro
	public static function build():Array<Field> {
		file = File.write('log.txt');
		
		var fields:Array<Field> = Context.getBuildFields();
		for (n in fields) {
			file.writeString('' + n.name + ' | ' + n.doc + '\n');
		}
		
		file.close();
		return fields;
	}
	
}

Doc.hx

package uhu.macro;

/**
 * ...
 * @author Skial Bainn
 */

@:autoBuild(uhu.macro.doc.Build.build())
interface Doc {}

log.txt

main | null

Main.hx

package ;
import uhu.macro.Doc;

/**
 * ...
 * @author Skial Bainn
 */

class Main implements Doc {
	
	/**
	 * kkllkklklklklklklk
	 */
	public static function main():Void {
		
	}
	
}