80 lines
1.8 KiB
Objective-C
80 lines
1.8 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// <rdar://problem/6212771>
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#define nil ((void*) 0)
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@interface A
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@property int x;
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@end
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@interface B : A
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@end
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// Basic checks...
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id f0(int cond, id a, void *b) {
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return cond ? a : b;
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}
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A *f0_a(int cond, A *a, void *b) {
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return cond ? a : b;
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}
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id f1(int cond, id a) {
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return cond ? a : nil;
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}
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A *f1_a(int cond, A *a) {
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return cond ? a : nil;
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}
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void *f1_const_a(int x, void *p, const A * q) {
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void *r = x ? p : q; // expected-warning{{initializing 'void *' with an expression of type 'const void *' discards qualifiers}}
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return r;
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}
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// Check interaction with qualified id
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@protocol P0 @end
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id f2(int cond, id<P0> a, void *b) {
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return cond ? a : b;
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}
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id f3(int cond, id<P0> a) {
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return cond ? a : nil;
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}
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// Check that result actually has correct type.
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// Using properties is one way to find the compiler internal type of a
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// conditional expression. Simple assignment doesn't work because if
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// the type is id then it can be implicitly promoted.
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@protocol P1
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@property int x;
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@end
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int f5(int cond, id<P1> a, id<P1> b) {
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return (cond ? a : b).x;
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}
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int f5_a(int cond, A *a, A *b) {
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return (cond ? a : b).x;
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}
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int f5_b(int cond, A *a, B *b) {
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return (cond ? a : b).x;
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}
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int f6(int cond, id<P1> a, void *b) {
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// This should result in something with id type, currently.
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return (cond ? a : b).x; // expected-error {{member reference base type 'void *' is not a structure or union}}
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}
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int f7(int cond, id<P1> a) {
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return (cond ? a : nil).x;
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}
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int f8(int cond, id<P1> a, A *b) {
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return a == b; // expected-warning {{comparison of distinct pointer types ('id<P1>' and 'A *')}}
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}
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int f9(int cond, id<P1> a, A *b) {
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return (cond ? a : b).x; // expected-warning {{incompatible operand types ('id<P1>' and 'A *')}} \
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expected-error {{property 'x' not found on object of type 'id'}}
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}
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