我在libcpp.algorithm.sort上使用std::sort（libcpp.vector）进行编译时遇到问题。这是我的简短代码：
from libcpp.algorithm cimport sort as stdsort
from libcpp.vector cimport vector
cdef sort_something(mylist):
myvec = vector[int]()
for num in mylist: myvec.push_back(num)
stdsort(myvec.begin(), myvec.end())
这是使用标准语法在C ++ std::sort上使用vector。我收到一些愤怒的编译器消息。作为参考，这是我的setup.py文件：
from distutils.core import setup
from Cython.Build import cythonize
setup(
ext_modules=cythonize("*.pyx", language="c++")
)
这是编译器输出。 （警告：很长，我无法理解。）
python setup.py build_ext --inplace
running build_ext
building 'sample' extension
cc -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -arch i386 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/core/include -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c sample.cpp -o build/temp.macosx-10.10-intel-2.7/sample.o
In file included from sample.cpp:257:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:702:71: error: invalid operands to binary expression ('const _object' and 'const _object')
bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;}
~~~ ^ ~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3862:17: note: in instantiation of member function 'std::__1::__less<_object, _object>::operator()' requested here
if (__comp(*--__last, *__first))
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4048:5: note: in instantiation of function template specialization 'std::__1::__sort<std::__1::__less<_object, _object> &, _object *>' requested here
__sort<_Comp_ref>(__first, __last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4057:12: note: in instantiation of function template specialization 'std::__1::sort<_object *, std::__1::__less<_object, _object> >' requested here
_VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
^
sample.cpp:855:8: note: in instantiation of function template specialization 'std::__1::sort<_object *>' requested here
std::sort<PyObject *>(__pyx_t_2, __pyx_t_5);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/utility:424:1: note: candidate template ignored: could not match 'pair<type-parameter-0-0, type-parameter-0-1>' against 'const _object'
operator< (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/iterator:592:1: note: candidate template ignored: could not match 'reverse_iterator<type-parameter-0-0>' against 'const _object'
operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/iterator:996:1: note: candidate template ignored: could not match 'move_iterator<type-parameter-0-0>' against 'const _object'
operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/iterator:1312:1: note: candidate template ignored: could not match '__wrap_iter<type-parameter-0-0>' against 'const _object'
operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2917:1: note: candidate template ignored: could not match 'unique_ptr<type-parameter-0-0, type-parameter-0-1>' against 'const _object'
operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2975:1: note: candidate template ignored: could not match 'unique_ptr<type-parameter-0-0, type-parameter-0-1>' against 'const _object'
operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2984:1: note: candidate template ignored: could not match 'unique_ptr<type-parameter-0-0, type-parameter-0-1>' against 'const _object'
operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:4774:1: note: candidate template ignored: could not match 'shared_ptr<type-parameter-0-0>' against 'const _object'
operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:4839:1: note: candidate template ignored: could not match 'shared_ptr<type-parameter-0-0>' against 'const _object'
operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:4847:1: note: candidate template ignored: could not match 'shared_ptr<type-parameter-0-0>' against 'const _object'
operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
^
In file included from sample.cpp:257:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3649:20: error: no matching function for call to '__sort3'
unsigned __r = __sort3<_Compare>(__x1, __x2, __x3, __c);
^~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3869:20: note: in instantiation of function template specialization 'std::__1::__sort4<std::__1::__less<_object, _object> &, _object *>' requested here
_VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4048:5: note: in instantiation of function template specialization 'std::__1::__sort<std::__1::__less<_object, _object> &, _object *>' requested here
__sort<_Comp_ref>(__first, __last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4057:12: note: in instantiation of function template specialization 'std::__1::sort<_object *, std::__1::__less<_object, _object> >' requested here
_VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
^
sample.cpp:855:8: note: in instantiation of function template specialization 'std::__1::sort<_object *>' requested here
std::sort<PyObject *>(__pyx_t_2, __pyx_t_5);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3609:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3675:20: error: no matching function for call to '__sort4'
unsigned __r = __sort4<_Compare>(__x1, __x2, __x3, __x4, __c);
^~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3872:20: note: in instantiation of function template specialization 'std::__1::__sort5<std::__1::__less<_object, _object> &, _object *>' requested here
_VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4048:5: note: in instantiation of function template specialization 'std::__1::__sort<std::__1::__less<_object, _object> &, _object *>' requested here
__sort<_Comp_ref>(__first, __last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4057:12: note: in instantiation of function template specialization 'std::__1::sort<_object *, std::__1::__less<_object, _object> >' requested here
_VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
^
sample.cpp:855:8: note: in instantiation of function template specialization 'std::__1::sort<_object *>' requested here
std::sort<PyObject *>(__pyx_t_2, __pyx_t_5);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3646:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort4(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3740:5: error: no matching function for call to '__sort3'
__sort3<_Compare>(__first, __first+1, __j, __comp);
^~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3877:20: note: in instantiation of function template specialization 'std::__1::__insertion_sort_3<std::__1::__less<_object, _object> &, _object *>' requested
here
_VSTD::__insertion_sort_3<_Compare>(__first, __last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4048:5: note: in instantiation of function template specialization 'std::__1::__sort<std::__1::__less<_object, _object> &, _object *>' requested here
__sort<_Comp_ref>(__first, __last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4057:12: note: in instantiation of function template specialization 'std::__1::sort<_object *, std::__1::__less<_object, _object> >' requested here
_VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
^
sample.cpp:855:8: note: in instantiation of function template specialization 'std::__1::sort<_object *>' requested here
std::sort<PyObject *>(__pyx_t_2, __pyx_t_5);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3609:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3773:9: error: no matching function for call to '__sort3'
_VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp);
^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__config:366:15: note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4003:32: note: in instantiation of function template specialization 'std::__1::__insertion_sort_incomplete<std::__1::__less<_object, _object> &, _object *>'
requested here
bool __fs = _VSTD::__insertion_sort_incomplete<_Compare>(__first, __i, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4048:5: note: in instantiation of function template specialization 'std::__1::__sort<std::__1::__less<_object, _object> &, _object *>' requested here
__sort<_Comp_ref>(__first, __last, __comp);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:4057:12: note: in instantiation of function template specialization 'std::__1::sort<_object *, std::__1::__less<_object, _object> >' requested here
_VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
^
sample.cpp:855:8: note: in instantiation of function template specialization 'std::__1::sort<_object *>' requested here
std::sort<PyObject *>(__pyx_t_2, __pyx_t_5);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3609:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3776:9: error: no matching function for call to '__sort4'
_VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp);
^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__config:366:15: note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3646:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort4(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3779:9: error: no matching function for call to '__sort5'
_VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp);
^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__config:366:15: note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3672:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort5(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3784:5: error: no matching function for call to '__sort3'
__sort3<_Compare>(__first, __first+1, __j, __comp);
^~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:3609:1: note: candidate template ignored: substitution failure [with _Compare = std::__1::__less<_object, _object> &, _ForwardIterator = _object *]
__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c)
^
8 errors generated.
error: command 'cc' failed with exit status 1
make: *** [all] Error 1
我对这个载体进行排序是不是正确的做法？
答案 0 :(得分：1)
查看第一条错误消息：＆＃34;二进制表达式的操作数无效（＆＃39; const _object＆＃39;和＆＃39; const _object＆＃39;）＆＃34;它引用的行间接来自std::less，这是使用std::sort时的默认比较函数。出错的原因是被排序的C ++序列似乎由_object个实例组成，而不是你想象的整数，而对于这种类型，只是没有定义小于比较。< / p>