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/* Contributed by Nicola Pero , November 2010.  */

/* { dg-do compile } */

#include 

/* Test that @optional for @protocol works.  */

@protocol MyProtocol

+ (int)classMethod;

- (int)method;

@optional

+ (int)optionalClassMethod;

- (int)optionalMethod;

@end

@interface MyRootClass 

@end

/* The implementation implements both the @required methods, but none

   of the @optional ones.  There should be no warnings as the

   @optional methods are optional. ;-)  */

@implementation MyRootClass

+ (int)classMethod

{

  return 20;

}

- (int)method

{

  return 11;

}

@end

int function (id  object1,

              MyRootClass *object2)

{

  /* Test that there are no warnings if you try to use an @optional

     method with an object of the class.  */

  int i = 0;

  i += [object1 method];

  i += [object2 method];

  i += [MyRootClass classMethod];

  i += [object1 optionalMethod];

  i += [object2 optionalMethod];

  i += [MyRootClass optionalClassMethod];

  return i;

}