text: //
  //  NSInvocation+EXT.h
  //  extobjc
  //
  //  Created by Justin Spahr-Summers on 2011-03-11.
  //  Copyright (C) 2012 Justin Spahr-Summers.
  //  Released under the MIT license.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSInvocation (EXTExtensions)
  /**
   * Using the variadic arguments in \a args, initializes the arguments of this
   * invocation starting at index 2 (after 'self' and '_cmd'). The argument types
   * are determined using the invocation's method signature.
   *
   * Returns \c NO if an error occurs (such as being unable to retrieve an
   * argument for a certain type).
   *
   * @warning Due to the mechanics behind variable argument lists, this method cannot
   * be used with method signatures that involve \c struct or \c union parameters.
   * Blocks and function pointers may or may not also cause problems. Such
   * arguments must be set individually.
   */
  - (BOOL)setArgumentsFromArgumentList:(va_list)args;
  @end
  