如何解決boost :: shared_ptr和使用std :: shared_ptr之間的衝突？

Question

如果我在此代碼片段中將boost :: shared_ptr更改爲std :: shared_ptr，那麼將會出現鏈接器錯誤。

#include <iostream> 
#include <sstream> 
#include <iterator> 
#include <cctype> 
#include <cmath> 

#include <string> 
#include <vector> 
#include <stack> 
#include <queue> 
#include <set> 
#include <map> 

#include <functional> 
#include <utility> 
#include <numeric> 

#include <boost/assign.hpp> 
#include <boost/assign/std/vector.hpp> 

#include <boost/algorithm/string.hpp> 

#include <boost/test/included/unit_test.hpp> 
#include <boost/test/included/unit_test_framework.hpp> 
#include <boost/bind.hpp> 

//using namespace std; 
//using namespace boost; 

using std::string; 
using std::ostringstream; 
using namespace boost::assign; 
using namespace boost::unit_test; 

template<typename T> string to_string(T data) { ostringstream ost; ost << data; return ost.str(); } 

class TwoStringMasks { 
public: 
    string shortestCommon(string s1, string s2) { 
     //if(s1.find("*") != 0 || 
     return ""; 
    } 
}; 

class two_string_masks_test { 
public: 
    void test_case_one() { 
     string str = "TOPCODER*"; 
     BOOST_CHECK_EQUAL(str.find("*"), str.length() - 2); 
    } 
}; 

test_suite* init_unit_test_suite(int argc, char* argv[]) { 
    boost::shared_ptr<two_string_masks_test> tester(new two_string_masks_test); 
    framework::master_test_suite().add( 
     BOOST_TEST_CASE(boost::bind(&two_string_masks_test::test_case_one, tester))); 
    return 0; 
} 

錯誤：

Error 12 error C2784: 'T *boost::get_pointer(T *)' : could not deduce template argument for 'T *' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 10 error C2784: 'T *boost::get_pointer(const std::auto_ptr<_Ty> &)' : could not deduce template argument for 'const std::auto_ptr<_Ty> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 11 error C2784: 'T *boost::get_pointer(const std::auto_ptr<_Ty> &)' : could not deduce template argument for 'const std::auto_ptr<_Ty> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 8 error C2784: 'T *boost::get_pointer(const boost::shared_ptr<X> &)' : could not deduce template argument for 'const boost::shared_ptr<X> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 9 error C2784: 'T *boost::get_pointer(const boost::shared_ptr<X> &)' : could not deduce template argument for 'const boost::shared_ptr<X> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 6 error C2784: 'T *boost::get_pointer(const boost::scoped_ptr<T> &)' : could not deduce template argument for 'const boost::scoped_ptr<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 7 error C2784: 'T *boost::get_pointer(const boost::scoped_ptr<T> &)' : could not deduce template argument for 'const boost::scoped_ptr<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 13 error C2784: 'T *boost::get_pointer(const boost::reference_wrapper<T> &)' : could not deduce template argument for 'const boost::reference_wrapper<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 14 error C2784: 'T *boost::get_pointer(const boost::reference_wrapper<T> &)' : could not deduce template argument for 'const boost::reference_wrapper<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 2 error C2784: 'optional<T>::pointer_type boost::get_pointer(boost::optional<T> &)' : could not deduce template argument for 'boost::optional<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 3 error C2784: 'optional<T>::pointer_type boost::get_pointer(boost::optional<T> &)' : could not deduce template argument for 'boost::optional<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 4 error C2784: 'optional<T>::pointer_const_type boost::get_pointer(const boost::optional<T> &)' : could not deduce template argument for 'const boost::optional<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 
Error 5 error C2784: 'optional<T>::pointer_const_type boost::get_pointer(const boost::optional<T> &)' : could not deduce template argument for 'const boost::optional<T> &' from 'std::tr1::shared_ptr<_Ty>' c:\program files\boost\boost_1_44\boost\bind\mem_fn_template.hpp 40 1 NET Report 

我做了什麼錯？我猜想std命名空間和boost命名空間之間存在衝突，但我不知道如何解決它？任何想法？

謝謝，
陳

Answer 1

它看起來像你需要添加get_pointer的重載使用std::shared_ptr與boost :: bind。

namespace boost { 
    template<class T> const T* get_pointer(const std::shared_ptr<T>& ptr) 
    { 
    return ptr.get(); 
    } 

    template<class T> T* get_pointer(std::shared_ptr<T>& ptr) 
    { 
    return ptr.get(); 
    } 
} 

我會假設，如果您使用std::bind代替它，這已經在工作。或在bind中使用tester.get()。

Answer 2

升壓和TR1共享指針是分開的實施方式和不兼容 - 選擇一個或另一個並專門使用它。

Answer 3

boost :: bind不知道如何處理tr1 :: shared_ptr它知道如何處理boost :: shared_ptr。

你可以嘗試tr1 :: bind，它可能適用於tr1 :: shared_ptr。

那麼唯一的問題是，這是否會在BOOST_TEST_CASE中工作。如果它只是期望一個「可運行」，那麼tr1 ::函數就像一個「可運行」一樣。

Answer 4

您是否注意到您沒有明確包含<內存>標題（也沒有< boost/shared_ptr.hpp>）？

如果您提供了一些更多信息，它會更容易幫助。

1. 你使用什麼編譯器？
2. 您是否期望從boost編譯器中使用tr1？
3. 你想訪問shared_ptr爲std :: tr1 :: shared_ptr或簡單地std :: shared_ptr？