C++ C++“；运算符=“不匹配；lambda函数中的错误
我在非静态类成员函数中有一个lambda函数，用于std:：findC++ C++“；运算符=“不匹配；lambda函数中的错误,c++,lambda,compiler-errors,C++,Lambda,Compiler Errors,我在非静态类成员函数中有一个lambda函数，用于std:：find //Somewhere in the header... Gtk::ComboBoxText *optionChoiceComboBoxText = nullptr; // Initialized later in code std::vector<OptionData> optionList; int currentOptionPositionInList = -1; // In Interface.cpp
//Somewhere in the header...
Gtk::ComboBoxText *optionChoiceComboBoxText = nullptr; // Initialized later in code
std::vector<OptionData> optionList;
int currentOptionPositionInList = -1;
// In Interface.cpp
Interface::optionChangedHandler() {
currentOptionPositionInList = std::distance(optionList.begin(),
find(optionList.begin(), optionList.end(), [&](OptionData const& o) {
std::string s = optionChoiceComboBoxText->get_active_text();
return s == o.name;
})); //Error is here
}
//头中的某个地方。。。
Gtk:：ComboxText*OptionChoiceComboxText=nullptr；//稍后在代码中初始化
向量选择列表；
int currentOptionPositionInList=-1；
//在Interface.cpp中
接口：：optionChangedHandler（）{
CurrentOptionPositionList=std:：distance（optionList.begin（），
查找（optionList.begin（），optionList.end（），[&]（OptionData常量（&o）{
std:：string s=optionChoiceComboxText->get_active_text（）；
返回s==o.name；
}))；//错误在这里
}
[ 66%] Building CXX object CMakeFiles/RNS.dir/src/GUI/Interface.cpp.o
In file included from /usr/include/c++/5/bits/stl_algobase.h:71:0,
from /usr/include/c++/5/bits/char_traits.h:39,
from /usr/include/c++/5/ios:40,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iterator:64,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Iter_equals_val<_Value>::operator()(_Iterator) [with _Iterator = __gnu_cxx::__normal_iterator<OptionData*, std::vector<OptionData> >; _Value = const Interface::optionChangedHandler()::<lambda(const OptionData&)>]’:
/usr/include/c++/5/bits/stl_algo.h:120:14: required from ‘_RandomAccessIterator std::__find_if(_RandomAccessIterator, _RandomAccessIterator, _Predicate, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<OptionData*, std::vector<OptionData> >; _Predicate = __gnu_cxx::__ops::_Iter_equals_val<const Interface::optionChangedHandler()::<lambda(const OptionData&)> >]’
/usr/include/c++/5/bits/stl_algo.h:161:23: required from ‘_Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = __gnu_cxx::__normal_iterator<OptionData*, std::vector<OptionData> >; _Predicate = __gnu_cxx::__ops::_Iter_equals_val<const Interface::optionChangedHandler()::<lambda(const OptionData&)> >]’
/usr/include/c++/5/bits/stl_algo.h:3790:28: required from ‘_IIter std::find(_IIter, _IIter, const _Tp&) [with _IIter = __gnu_cxx::__normal_iterator<OptionData*, std::vector<OptionData> >; _Tp = Interface::optionChangedHandler()::<lambda(const OptionData&)>]’
/home/crefrod/RNS/src/GUI/Interface.cpp:70:50: required from here
/usr/include/c++/5/bits/predefined_ops.h:194:17: error: no match for ‘operator==’ (operand types are ‘OptionData’ and ‘const Interface::optionChangedHandler()::<lambda(const OptionData&)>’)
{ return *__it == _M_value; }
^
In file included from /usr/include/c++/5/iterator:63:0,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/bits/stl_iterator.h:820:5: note: candidate: template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_IteratorL, _Container>&, const __gnu_cxx::__normal_iterator<_IteratorR, _Container>&)
operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
^
/usr/include/c++/5/bits/stl_iterator.h:820:5: note: template argument deduction/substitution failed:
In file included from /usr/include/c++/5/bits/stl_algobase.h:71:0,
from /usr/include/c++/5/bits/char_traits.h:39,
from /usr/include/c++/5/ios:40,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iterator:64,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/bits/predefined_ops.h:194:17: note: ‘OptionData’ is not derived from ‘const __gnu_cxx::__normal_iterator<_IteratorL, _Container>’
{ return *__it == _M_value; }
^
In file included from /usr/include/c++/5/iterator:63:0,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/bits/stl_iterator.h:827:5: note: candidate: template<class _Iterator, class _Container> bool __gnu_cxx::operator==(const __gnu_cxx::__normal_iterator<_Iterator, _Container>&, const __gnu_cxx::__normal_iterator<_Iterator, _Container>&)
operator==(const __normal_iterator<_Iterator, _Container>& __lhs,
^
/usr/include/c++/5/bits/stl_iterator.h:827:5: note: template argument deduction/substitution failed:
In file included from /usr/include/c++/5/bits/stl_algobase.h:71:0,
from /usr/include/c++/5/bits/char_traits.h:39,
from /usr/include/c++/5/ios:40,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iterator:64,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/bits/predefined_ops.h:194:17: note: ‘OptionData’ is not derived from ‘const __gnu_cxx::__normal_iterator<_Iterator, _Container>’
{ return *__it == _M_value; }
^
In file included from /usr/include/x86_64-linux-gnu/c++/5/bits/c++allocator.h:33:0,
from /usr/include/c++/5/bits/allocator.h:46,
from /usr/include/c++/5/string:41,
from /usr/include/c++/5/bits/locale_classes.h:40,
from /usr/include/c++/5/bits/ios_base.h:41,
from /usr/include/c++/5/ios:42,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iterator:64,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/ext/new_allocator.h:139:5: note: candidate: template<class _Tp> bool __gnu_cxx::operator==(const __gnu_cxx::new_allocator<_Tp>&, const __gnu_cxx::new_allocator<_Tp>&)
operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&)
^
/usr/include/c++/5/ext/new_allocator.h:139:5: note: template argument deduction/substitution failed:
In file included from /usr/include/c++/5/bits/stl_algobase.h:71:0,
from /usr/include/c++/5/bits/char_traits.h:39,
from /usr/include/c++/5/ios:40,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iterator:64,
from /usr/include/glibmm-2.4/glibmm/ustring.h:29,
from /usr/include/glibmm-2.4/glibmm/exception.h:25,
from /usr/include/glibmm-2.4/glibmm/error.h:23,
from /usr/include/glibmm-2.4/glibmm/thread.h:49,
from /usr/include/glibmm-2.4/glibmm.h:87,
from /usr/include/giomm-2.4/giomm.h:23,
from /home/crefrod/RNS/src/GUI/Interface.cpp:5:
/usr/include/c++/5/bits/predefined_ops.h:194:17: note: ‘OptionData’ is not derived from ‘const __gnu_cxx::new_allocator<_Tp>’
{ return *__it == _M_value; }
[66%]构建CXX对象cmakfiles/RNS.dir/src/GUI/Interface.cpp.o
在/usr/include/c++/5/bits/stl_algobase.h:71:0中包含的文件中，
从/usr/include/c++/5/bits/char_traits.h:39，
从/usr/include/c++/5/ios:40，
从/usr/include/c++/5/ostream:38，
从/usr/include/c++/5/iterator:64，
从/usr/include/glibmm-2.4/glibmm/ustring.h:29，
从/usr/include/glibmm-2.4/glibmm/exception.h:25，
从/usr/include/glibmm-2.4/glibmm/error.h:23，
从/usr/include/glibmm-2.4/glibmm/thread.h:49，
从/usr/include/glibmm-2.4/glibmm.h:87，
from/usr/include/giomm-2.4/giomm.h:23，
from/home/crefrod/RNS/src/GUI/Interface.cpp:5：
/usr/include/c++/5/bits/predefined_ops.h:在'bool\uu gnu\u cxx:：\uu ops:：\u Iter\u equals\u val:：operator（）（\u Iterator）[with u Iterator=\uu gnu cxx:：\u normal\u Iterator；\u Value=const Interface:：optionChangedHandler（）：]：
/usr/include/c++/5/bits/stl_algo.h:120:14：从“_randomAccessIteratorstd:：_find_if”（_RandomAccessIterator，_RandomAccessIterator，_Predicate，std:：random_access_iterator_tag）[带_RandomAccessIterator=u gnu_cxx:：_normalIterator；_Predicate=_gnucxx:_gnucxx:_ops:：_Iter=u val]”
/usr/include/c++/5/bits/stl_algo.h:161:23:来自“_iteratorstd:：_find_if（_Iterator，_Iterator，_Predicate）[带_Iterator=u gnu cxx:：u normal_Iterator；_Predicate=u gnu cxx:：u ops:u Iter_equals][uu val]的必需
/usr/include/c++/5/bits/stl_algo.h:3790:28:从“_iiterstd:：find（_IIter，_IIter，const)Tp&”）中需要[with _IIter=u gnu_cxx:：uu normal_迭代器；_Tp=接口：：optionChangedHandler（）：]”
/home/crefrod/RNS/src/GUI/Interface.cpp:70:50:此处需要
/usr/include/c++/5/bits/prefined_ops.h:194:17:错误：与“operator==”不匹配（操作数类型为“OptionData”和“const Interface:：optionChangedHandler（）：”）
{return*\uu it==\u M_value；}
^
在/usr/include/c++/5/iterator:63:0中包含的文件中，
从/usr/include/glibmm-2.4/glibmm/ustring.h:29，
从/usr/include/glibmm-2.4/glibmm/exception.h:25，
从/usr/include/glibmm-2.4/glibmm/error.h:23，
从/usr/include/glibmm-2.4/glibmm/thread.h:49，
从/usr/include/glibmm-2.4/glibmm.h:87，
from/usr/include/giomm-2.4/giomm.h:23，
from/home/crefrod/RNS/src/GUI/Interface.cpp:5：
/usr/include/c++/5/bits/stl_iterator.h:820:5：注：候选：模板bool\uu gnu\u cxx:：operator==（const\uu gnu\u cxx:：\uu normal\u迭代器&，const\uu gnu cxx:：\uu normal\u迭代器&）
运算符==（常量、正常迭代器和lhs，
^
/usr/include/c++/5/bits/stl_迭代器。h:820:5:注意：模板参数推导/替换失败：
在/usr/include/c++/5/bits/stl_algobase.h:71:0中包含的文件中，
从/usr/include/c++/5/bits/char_traits.h:39，
从/usr/include/c++/5/ios:40，
从/usr/include/c++/5/ostream:38，
从/usr/include/c++/5/iterator:64，
从/usr/include/glibmm-2.4/glibmm/ustring.h:29，
从/usr/include/glibmm-2.4/glibmm/exception.h:25，
从/usr/include/glibmm-2.4/glibmm/error.h:23，
从/usr/include/glibmm-2.4/glibmm/thread.h:49，
从/usr/include/glibmm-2.4/glibmm.h:87，
from/usr/include/giomm-2.4/giomm.h:23，
from/home/crefrod/RNS/src/GUI/Interface.cpp:5：
/usr/include/c++/5/bits/predefined_ops.h:194:17：注意：“OptionData”不是从“const”派生出来的
{return*\uu it==\u M_value；}
^
在/usr/include/c++/5/iterator:63:0中包含的文件中，
从/usr/include/glibmm-2.4/glibmm/ustring.h:29，
从/usr/include/glibmm-2.4/glibmm/exception.h:25，
从/usr/include/glibmm-2.4/glibmm/error.h:23，
从/usr/include/glibmm-2.4/glibmm/thread.h:49，
从/usr/include/glibmm-2.4/glibmm.h:87，
from/usr/include/giomm-2.4/giomm.h:23，
from/home/crefrod/RNS/src/GUI/Interface.cpp:5：
/usr/include/c++/5/bits/stl\u迭代器。h:827:5：注：候选：模板bool\uuu-gnu-cxx:：operator==（const\uu-gnu-cxx:：：\uu-normal\u迭代器&，const\uu-gnu-cxx:：\uu-normal\u迭代器&）
运算符==（常量、正常迭代器和lhs，
^
/usr/include/c++/5/bits/stl_迭代器。h:827:5:注意：模板参数推导/替换失败：
在/usr/include/c++/5/bits/stl_algobase.h:71:0中包含的文件中，
从/usr/include/c++/5/bits/char_traits.h:39，
从/usr/include/c++/5/ios:40，
从/usr/include/c++/5/ostream:38，
从/usr/include/c++/5/iterator:64，
从/usr/include/glibmm-2.4/glibmm/ustring.h:29，
从/usr/include/glibmm-2.4/glibmm/exception.h:25，
from/usr/include/glibmm-2.4/glibmm/e