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/* Test assignments and comparisons between protocols (obscure case).  */

/* Author: Nicola Pero .  */

/* { dg-do compile } */

#include 

@protocol MyProtocolA

- (void) methodA;

@end

@protocol MyProtocolB

- (void) methodB;

@end

@protocol MyProtocolAB 

@end

@protocol MyProtocolAC 

- (void) methodC;

@end

int main()

{

  id obj_a = nil;

  id obj_b = nil;

  id obj_ab = nil;

  id obj_ac = nil;

  obj_a = obj_b;  /* { dg-warning "does not conform" } */

  obj_a = obj_ab; /* Ok */

  obj_a = obj_ac; /* Ok */

  obj_b = obj_a;  /* { dg-warning "does not conform" } */

  obj_b = obj_ab; /* Ok */

  obj_b = obj_ac; /* { dg-warning "does not conform" } */

  obj_ab = obj_a;  /* { dg-warning "does not conform" } */

  obj_ab = obj_b;  /* { dg-warning "does not conform" } */

  obj_ab = obj_ac; /* { dg-warning "does not conform" } */

  obj_ac = obj_a;  /* { dg-warning "does not conform" } */

  obj_ac = obj_b;  /* { dg-warning "does not conform" } */

  obj_ac = obj_ab; /* { dg-warning "does not conform" } */

  if (obj_a == obj_b) ; /* { dg-warning "lacks a cast" } */

  if (obj_b == obj_a) ; /* { dg-warning "lacks a cast" } */

  if (obj_a == obj_ab) ; /* Ok */

  if (obj_ab == obj_a) ; /* Ok */ /* Spurious 2.95.4 warning here */

  if (obj_a == obj_ac) ; /* Ok */

  if (obj_ac == obj_a) ; /* Ok */ /* Spurious 2.95.4 warning here */

  if (obj_b == obj_ab) ; /* Ok */

  if (obj_ab == obj_b) ; /* Ok */ /* Spurious 2.95.4 warning here */

  if (obj_b == obj_ac) ; /* { dg-warning "lacks a cast" } */

  if (obj_ac == obj_b) ; /* { dg-warning "lacks a cast" } */

  if (obj_ab == obj_ac) ; /* { dg-warning "lacks a cast" } */

  if (obj_ac == obj_ab) ; /* { dg-warning "lacks a cast" } */

  return 0;

}