用于进行gcc测试

				/* Test if prior method lookup at method @implementation time is not				   overly aggressive, leading to methods being found in other classes.  */				/* Author: Ziemowit Laski .  */								/* { dg-do compile } */								#include 								@class NSString;								@protocol NSMenuItem				+ (void)setUsesUserKeyEquivalents:(BOOL)flag;				+ (BOOL)usesUserKeyEquivalents;				@end								@interface NSMenuItem : Object  {				  @private				  id _menu;				}				@end								@interface NSResponder : Object 				{				  id _nextResponder;				}				@end								@interface Object(NSMenuValidation)				- (BOOL)validateMenuItem:(id )menuItem;				@end								@interface NSResponder (NSStandardKeyBindingMethods)				- (void)insertText:(id)insertString;				- (void)doCommandBySelector:(SEL)aSelector;				@end								@interface NSView : NSResponder				{				  id _superview;				  id _subviews;				}				@end								@interface SKTGraphicView : NSView {				  @private				  float _gridSpacing;				}				@end								@implementation SKTGraphicView				- (BOOL)validateMenuItem:(NSMenuItem *)item {				  return (BOOL)1;				}				- (void)insertText:(NSString *)str {				}				@end