Stringly fail.

Foo.hx

package ;

#if macro
import haxe.macro.Expr;
import haxe.macro.Context;
using haxe.macro.ExprTools;
#end

class Foo {
  public function new() {
  
  }
  public inline function add(foo:Dynamic) {
    trace('add $foo');
    return this;
  }
  macro public function transmogrify(ethis, exprs:Array<Expr>) {
    var r:String="{\n";
    var first:Bool=true;
    for(v in exprs) {
      if(first) {
        first=false;
      } else {
        r+="\n";
      }
      var vs:String = ExprTools.toString(v);
      r+=ExprTools.toString(ethis)+".add("+vs+");";
    }
    r+="}";
    return Context.parse(r,Context.currentPos());
  } 
}

Run.hx

package ;

class Run {
  static function main() {
    new Foo().add('foo').transmogrify('a', 'b', 'c');
  }
}