| // RUN: %clang_cc1 -verify -Wused-but-marked-unused -Wno-objc-protocol-method-implementation -Wunused -Wunused-parameter -fsyntax-only -Wno-objc-root-class %s |
| |
| int printf(const char *, ...); |
| |
| @interface Greeter |
| + (void) hello; |
| @end |
| |
| @implementation Greeter |
| + (void) hello { printf("Hello, World!\n"); } |
| @end |
| |
| int test1(void) { |
| [Greeter hello]; |
| return 0; |
| } |
| |
| @interface NSObject @end |
| @interface NSString : NSObject |
| - (int)length; |
| @end |
| |
| void test2() { |
| @"pointless example call for test purposes".length; // expected-warning {{property access result unused - getters should not be used for side effects}} |
| } |
| |
| @interface foo |
| - (int)meth: (int)x : (int)y : (int)z ; |
| @end |
| |
| @implementation foo |
| - (int) meth: (int)x: // expected-warning {{'x' used as the name of the previous parameter rather than as part of the selector}} \ |
| // expected-note {{introduce a parameter name to make 'x' part of the selector}} \ |
| // expected-note {{or insert whitespace before ':' to use 'x' as parameter name and have an empty entry in the selector}} |
| |
| (int)y: // expected-warning {{'y' used as the name of the previous parameter rather than as part of the selector}} \ |
| // expected-note {{introduce a parameter name to make 'y' part of the selector}} \ |
| // expected-note {{or insert whitespace before ':' to use 'y' as parameter name and have an empty entry in the selector}} |
| (int) __attribute__((unused))z { return x; } |
| @end |
| |
| //===------------------------------------------------------------------------=== |
| // The next test shows how clang accepted attribute((unused)) on ObjC |
| // instance variables, which GCC does not. |
| //===------------------------------------------------------------------------=== |
| |
| #if __has_feature(attribute_objc_ivar_unused) |
| #define UNUSED_IVAR __attribute__((unused)) |
| #else |
| #error __attribute__((unused)) not supported on ivars |
| #endif |
| |
| @interface TestUnusedIvar { |
| id y __attribute__((unused)); // no-warning |
| id x UNUSED_IVAR; // no-warning |
| } |
| @end |
| |
| // rdar://10777111 |
| static NSString *x = @"hi"; // expected-warning {{unused variable 'x'}} |
| |
| // rdar://12233989 |
| @interface TestTransitiveUnused |
| - (void) a __attribute__((unused)); |
| - (void) b __attribute__((unused)); |
| @end |
| |
| @interface TestTransitiveUnused(CAT) |
| @end |
| |
| @implementation TestTransitiveUnused(CAT) |
| - (void) b {} |
| - (void) a { [self b]; } |
| @end |
| |
| // Test that objc_precise_lifetime suppresses |
| // unused variable warnings. |
| extern void rdar15596883_foo(void); |
| void rdar15596883(id x) { |
| __attribute__((objc_precise_lifetime)) id y = x; // no-warning |
| rdar15596883_foo(); |
| } |
| |
| @interface PropertyObject : NSObject |
| @property int length; |
| @end |
| |
| @protocol P |
| @property int property; |
| @end |
| |
| void test3(PropertyObject *o) |
| { |
| [o length]; // No warning. property name used in direct method call. |
| } |
| |
| void test4(id o) |
| { |
| [o length]; // No warning. |
| } |
| |
| void test5(id <P> p) |
| { |
| [p property]; // No warning. property name used in direct method call. |
| } |
| |
| // rdar://19773512 |
| @interface Model |
| @property (nonatomic, retain, setter=setOrCreateGroup:, getter=getOrCreateGroup) id group; |
| @end |
| |
| @implementation Model { |
| id _group; |
| } |
| - (void)method { |
| [self getOrCreateGroup]; |
| self.getOrCreateGroup; // expected-warning {{property access result unused - getters should not be used for side effects}} |
| self.group; // expected-warning {{property access result unused - getters should not be used for side effects}} |
| self.group = (void*)0; |
| [self setOrCreateGroup : ((void*)0)]; |
| |
| } |
| - (id)getOrCreateGroup { |
| if (!_group) { |
| _group = @"group"; |
| } |
| return _group; |
| } |
| @end |
| |