Error(s):

C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xhash(209) : error C3497: you cannot construct an instance of a lambda
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xhash(208) : while compiling class template member function 'main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76> std::_Hash_oper2<false,_Hasher,_Keyeq>::_Getkeyeq(void) const'
        with
        [
            _Hasher=main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>
,            _Keyeq=main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>
        ]
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xhash(247) : see reference to function template instantiation 'main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76> std::_Hash_oper2<false,_Hasher,_Keyeq>::_Getkeyeq(void) const' being compiled
        with
        [
            _Hasher=main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>
,            _Keyeq=main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>
        ]
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xhash(220) : see reference to class template instantiation 'std::_Hash_oper2<false,_Hasher,_Keyeq>' being compiled
        with
        [
            _Hasher=main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>
,            _Keyeq=main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>
        ]
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\unordered_set(21) : see reference to class template instantiation 'std::_Uhash_compare<_Kty,_Hasher,_Keyeq>' being compiled
        with
        [
            _Kty=Point
,            _Hasher=main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>
,            _Keyeq=main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>
        ]
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xhash(255) : see reference to class template instantiation 'std::_Uset_traits<_Kty,std::_Uhash_compare<_Kty,_Hasher,_Keyeq>,_Alloc,false>' being compiled
        with
        [
            _Kty=Point
,            _Hasher=main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>
,            _Keyeq=main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>
,            _Alloc=std::allocator<Point>
        ]
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\unordered_set(58) : see reference to class template instantiation 'std::_Hash<std::_Uset_traits<_Kty,std::_Uhash_compare<_Kty,_Hasher,_Keyeq>,_Alloc,false>>' being compiled
        with
        [
            _Kty=Point
,            _Hasher=main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>
,            _Keyeq=main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>
,            _Alloc=std::allocator<Point>
        ]
        source_file.cpp(24) : see reference to class template instantiation 'std::unordered_set<Point,main::<lambda_eb89b3bbf5b8ab2015af039a4cfbf167>,main::<lambda_b3e605481e81fbec1b2a7e3ec9f64d76>,std::allocator<_Kty>>' being compiled
        with
        [
            _Kty=Point
        ]