Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 53 insertions, 0 deletions

diff --git a/clang/test/SemaObjC/unused.m b/clang/test/SemaObjC/unused.m
new file mode 100644
index 0000000..975b9a9
--- /dev/null
+++ b/clang/test/SemaObjC/unused.m
@@ -0,0 +1,53 @@
+// RUN: %clang_cc1 -verify -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: 
+(int)y: // expected-warning{{unused}} 
+(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
+