Error "Stray '@' in program" in qt

[unnormal]

I'm building a Application on mac use Qt 5.0.2 , mac version 10.7.4. I want to use xcode in project. Example "Here ...":http://developer.apple.com/library/mac/#featuredarticles/FileSystemEvents/_index.html but Error display "Stray '@' in program" .This is my code

Watcher.pro
@
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = TestWatcherImage
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h
FileSystemWatcherOSX.h

FORMS += mainwindow.ui

OTHER_FILES +=
FileSystemWatcherOSX.mm

OBJECTIVE_SOURCES += FileSystemWatcherOSX.mm
LIBS += -framework AppKit
LIBS += -framework CoreFoundation
LIBS += -framework CoreServices
LIBS += -framework CarbonCore
@

FileWatcher.hpp
@
#include <QString>

#include <Foundation/NSString.h>
#include <Foundation/NSFileManager.h>
#include <Foundation/NSArray.h>

class FileSystemWatcherOSX
{
private:
FileSystemWatcherOSX();
public:
~FileSystemWatcherOSX();
static FileSystemWatcherOSX* singleton();
private:
void registerDefaults();
void initializeEventStream();
void addModifiedImagesAtPath(NSString* path);
void updateLastEventId(uint64_t eventId);
bool fileIsImage(NSString* path);
void updateLastModificationDateForPath(NSString* path);
NSDate* lastModificationDateForPath(NSString* path);
QString qt_mac_NSStringToQString(const NSString* nsstr);
private:
NSFileManager* fm;
IBOutlet NSTableView* table;
NSMutableArray* images;
NSMutableDictionary* pathModificationDates;
NSDate* appStartedTimestamp;
NSNumber* lastEventId;
FSEventStreamRef stream;

private:
static FileSystemWatcherOSX* _instance;
};

@

Can you help me ?
Thank a lot.

[butterface]

Try to open it in a text editor which is able to display special characters. Sometimes it happens from coping code that you catch not displayable characters which cause such errors.