1/* Test various ObjC types assignments and comparisons. */ 2/* Author: Nicola Pero <nicola@brainstorm.co.uk>. */ 3/* { dg-do compile } */ 4 5#include <objc/objc.h> 6 7@protocol MyProtocol 8- (void) foo; 9@end 10 11@interface MyClass 12@end 13 14@interface MyOtherClass <MyProtocol> 15- (void) foo; 16@end 17 18int main() 19{ 20 id obj = nil; 21 id<MyProtocol> obj_p = nil; 22 MyClass *obj_c = nil; 23 MyOtherClass *obj_cp = nil; 24 Class obj_C = Nil; 25 26 /* Assigning to an 'id' variable should never 27 generate a warning. */ 28 obj = obj_p; /* Ok */ 29 obj = obj_c; /* Ok */ 30 obj = obj_cp; /* Ok */ 31 obj = obj_C; /* Ok */ 32 33 /* Assigning to a 'MyClass *' variable should always generate a 34 warning, unless done from an 'id'. */ 35 obj_c = obj; /* Ok */ 36 obj_c = obj_p; /* { dg-warning "distinct Objective\\-C type" } */ 37 obj_c = obj_cp; /* { dg-warning "distinct Objective\\-C type" } */ 38 obj_c = obj_C; /* { dg-warning "distinct Objective\\-C type" } */ 39 40 /* Assigning to an 'id<MyProtocol>' variable should generate a 41 warning if done from a 'MyClass *' (which doesn't implement 42 MyProtocol), but not from an 'id' or from a 'MyOtherClass *' 43 (which implements MyProtocol). */ 44 obj_p = obj; /* Ok */ 45 obj_p = obj_c; /* { dg-warning "does not implement" } */ 46 obj_p = obj_cp; /* Ok */ 47 obj_p = obj_C; /* { dg-warning "distinct Objective\\-C type" } */ 48 49 /* Assigning to a 'MyOtherClass *' variable should always generate 50 a warning, unless done from an 'id' or an 'id<MyProtocol>' (since 51 MyOtherClass implements MyProtocol). */ 52 obj_cp = obj; /* Ok */ 53 obj_cp = obj_c; /* { dg-warning "distinct Objective\\-C type" } */ 54 obj_cp = obj_p; /* Ok */ 55 obj_cp = obj_C; /* { dg-warning "distinct Objective\\-C type" } */ 56 57 /* Any comparison involving an 'id' must be without warnings. */ 58 if (obj == obj_p) ; /* Ok */ /*Bogus warning here in 2.95.4*/ 59 if (obj_p == obj) ; /* Ok */ 60 if (obj == obj_c) ; /* Ok */ 61 if (obj_c == obj) ; /* Ok */ 62 if (obj == obj_cp) ; /* Ok */ 63 if (obj_cp == obj) ; /* Ok */ 64 if (obj == obj_C) ; /* Ok */ 65 if (obj_C == obj) ; /* Ok */ 66 67 /* Any comparison between 'MyClass *' and anything which is not an 'id' 68 must generate a warning. */ 69 if (obj_c == obj_p) ; /* { dg-warning "lacks a cast" } */ 70 if (obj_p == obj_c) ; /* { dg-warning "lacks a cast" } */ 71 if (obj_c == obj_cp) ; /* { dg-warning "lacks a cast" } */ 72 if (obj_cp == obj_c) ; /* { dg-warning "lacks a cast" } */ 73 if (obj_c == obj_C) ; /* { dg-warning "lacks a cast" } */ 74 if (obj_C == obj_c) ; /* { dg-warning "lacks a cast" } */ 75 76 /* Any comparison between 'MyOtherClass *' (which implements 77 MyProtocol) and an 'id' implementing MyProtocol are Ok. */ 78 if (obj_cp == obj_p) ; /* Ok */ 79 if (obj_p == obj_cp) ; /* Ok */ 80 81 82 if (obj_p == obj_C) ; /* { dg-warning "lacks a cast" } */ 83 if (obj_C == obj_p) ; /* { dg-warning "lacks a cast" } */ 84 if (obj_cp == obj_C) ; /* { dg-warning "lacks a cast" } */ 85 if (obj_C == obj_cp) ; /* { dg-warning "lacks a cast" } */ 86 87 return 0; 88} 89