objc4-437.tar.gz

[apple/objc4.git] / test / accessors.m

diff --git a/test/accessors.m b/test/accessors.m
new file mode 100644 (file)
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--- /dev/null
+++ b/test/accessors.m
@@ -0,0 +1,77 @@
+#import <Foundation/Foundation.h>
+#import <objc/runtime.h>
+#include "test.h"
+
+extern id objc_getProperty(id self, SEL _cmd, ptrdiff_t offset, BOOL atomic);
+extern void objc_setProperty(id self, SEL _cmd, ptrdiff_t offset, id newValue, BOOL atomic, BOOL shouldCopy);
+
+@interface Test : NSObject {
+    NSString *_value;
+    // _object is at the last optimized property offset
+    id _object __attribute__((aligned(64)));
+}
+@property(readonly) Class class;
+@property(copy) NSString *value;
+@property(assign) id object;
+@end
+
+typedef struct {  
+    id isa;
+    NSString *_value;
+    // _object is at the last optimized property offset
+    id _object __attribute__((aligned(64)));
+} TestDefs;
+
+@implementation Test
+
+// Question:  why can't this code be automatically generated?
+
+- (void)dealloc {
+    self.value = nil;
+    self.object = nil;
+    [super dealloc];
+}
+
+- (Class)class { return objc_getProperty(self, _cmd, 0, YES); }
+
+- (NSString*)value { return (NSString*) objc_getProperty(self, _cmd, offsetof(TestDefs, _value), YES); }
+- (void)setValue:(NSString*)inValue { objc_setProperty(self, _cmd, offsetof(TestDefs, _value), inValue, YES, YES); }
+
+- (id)object { return objc_getProperty(self, _cmd, offsetof(TestDefs, _object), YES); }
+- (void)setObject:(id)inObject { objc_setProperty(self, _cmd, offsetof(TestDefs, _object), inObject, YES, NO); }
+
+- (NSString *)description {
+    return [NSString stringWithFormat:@"value = %@, object = %@", self.value, self.object];
+}
+
+@end
+
+int main() {
+    NSAutoreleasePool *pool = [NSAutoreleasePool new];
+    
+    NSMutableString *value = [NSMutableString stringWithUTF8String:"test"];
+    id object = [NSNumber numberWithInt:11];
+    Test *t = [[Test new] autorelease];
+    t.value = value;
+    [value setString:@"yuck"];      // mutate the string.
+    testassert(t.value != value);   // must copy, since it was mutable.
+    testassert([t.value isEqualToString:@"test"]);
+
+    Class testClass = [Test class];
+    Class cls = t.class;
+    testassert(testClass == cls);
+    cls = t.class;
+    testassert(testClass == cls);
+
+    t.object = object;
+    t.object = object;
+
+    // NSLog(@"t.object = %@, t.value = %@", t.object, t.value);
+    // NSLog(@"t.object = %@, t.value = %@", t.object, t.value); // second call will optimized getters.
+    
+    [pool drain];
+
+    succeed(__FILE__);
+
+    return 0;
+}