Hello I need to use two classes like blow
file for class c1
#include<iostream>
#include<variant>
class c1{
private:
...
std::variant<c2,int,double,std::string> a;
public:
...
c2 getA(){
return a;
}
};
and in file of class c2
#include<iostream>
#include<vector>
class c2{
private:
...
std::vector<c1> b;
public:
...
c1 getB(){
return b;
}
};
I think my code is not such good
any one can help to fix or do this
I have use like this in blow of these two headers
class c1;
class c2{...};
but I still can't create a variable with c1 class
I can only create pointers but I can't use them correctly in the std::variant
and I have tried to including them but compiler get error
what can I do for fix this?
please help
EDIT:
and I have tried to including them but compiler get error
this is that error
In file included from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/move.h:55,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/nested_exception.h:40,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/exception:144,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ios:39,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ostream:38,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/iostream:39,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:9,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'struct std::is_trivially_destructible<JSONObject>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2846:25: required from 'constexpr const bool std::is_trivially_destructible_v<JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:313:5: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_dtor'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:321:20: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_move_assign'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:646:16: required by substitution of 'template<class ... _Types> using _Move_assign_alias = std::__detail::__variant::_Move_assign_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_assign, _Types ...> [with _Types = {int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject}]'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:1282:12: error: invalid use of incomplete type 'class JSONObject'
struct is_trivially_destructible
^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:14,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:14:7: note: forward declaration of 'class JSONObject'
class JSONObject;
^~~~~~~~~~
In file included from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/move.h:55,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/nested_exception.h:40,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/exception:144,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ios:39,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ostream:38,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/iostream:39,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:9,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'constexpr const bool std::is_trivially_destructible_v<JSONObject>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:313:5: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_dtor'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:321:20: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_move_assign'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:646:16: required by substitution of 'template<class ... _Types> using _Move_assign_alias = std::__detail::__variant::_Move_assign_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_assign, _Types ...> [with _Types = {int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject}]'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2846:25: error: 'value' is not a member of 'std::is_trivially_destructible<JSONObject>'
inline constexpr bool is_trivially_destructible_v =
^~~~~~~~~~~~~~~~~~~~~~~~~~~
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'struct std::__is_trivially_move_constructible_impl<JSONObject, true>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:1228:12: required from 'struct std::is_trivially_move_constructible<JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2834:25: required from 'constexpr const bool std::is_trivially_move_constructible_v<JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:317:5: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_move_ctor'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:523:70: required by substitution of 'template<class ... _Types> using _Move_ctor_alias = std::__detail::__variant::_Move_ctor_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_ctor, _Types ...> [with _Types = {int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject}]'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:526:12: required from 'struct std::__detail::__variant::_Copy_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:580:12: required from 'struct std::__detail::__variant::_Move_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:1221:12: error: invalid use of incomplete type 'class JSONObject'
struct __is_trivially_move_constructible_impl<_Tp, true>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:14,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:14:7: note: forward declaration of 'class JSONObject'
class JSONObject;
^~~~~~~~~~
In file included from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/move.h:55,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/nested_exception.h:40,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/exception:144,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ios:39,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ostream:38,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/iostream:39,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:9,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'constexpr const bool std::is_trivially_move_constructible_v<JSONObject>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:317:5: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_move_ctor'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:523:70: required by substitution of 'template<class ... _Types> using _Move_ctor_alias = std::__detail::__variant::_Move_ctor_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_ctor, _Types ...> [with _Types = {int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject}]'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:526:12: required from 'struct std::__detail::__variant::_Copy_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:580:12: required from 'struct std::__detail::__variant::_Move_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2834:25: error: 'value' is not a member of 'std::is_trivially_move_constructible<JSONObject>'
inline constexpr bool is_trivially_move_constructible_v =
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'struct std::__is_trivially_copy_constructible_impl<JSONObject, true>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:1207:12: required from 'struct std::is_trivially_copy_constructible<JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2831:25: required from 'constexpr const bool std::is_trivially_copy_constructible_v<JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:315:5: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_copy_ctor'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:489:70: required by substitution of 'template<class ... _Types> using _Copy_ctor_alias = std::__detail::__variant::_Copy_ctor_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_copy_ctor, _Types ...> [with _Types = {int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject}]'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:492:12: required from 'struct std::__detail::__variant::_Move_ctor_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:526:12: required from 'struct std::__detail::__variant::_Copy_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:580:12: required from 'struct std::__detail::__variant::_Move_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:1200:12: error: invalid use of incomplete type 'class JSONObject'
struct __is_trivially_copy_constructible_impl<_Tp, true>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:14,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:14:7: note: forward declaration of 'class JSONObject'
class JSONObject;
^~~~~~~~~~
In file included from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/move.h:55,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/nested_exception.h:40,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/exception:144,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ios:39,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ostream:38,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/iostream:39,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:9,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'constexpr const bool std::is_trivially_copy_constructible_v<JSONObject>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:315:5: required from 'constexpr const bool std::__detail::__variant::_Traits<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>::_S_trivial_copy_ctor'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:489:70: required by substitution of 'template<class ... _Types> using _Copy_ctor_alias = std::__detail::__variant::_Copy_ctor_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_copy_ctor, _Types ...> [with _Types = {int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject}]'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:492:12: required from 'struct std::__detail::__variant::_Move_ctor_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:526:12: required from 'struct std::__detail::__variant::_Copy_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:580:12: required from 'struct std::__detail::__variant::_Move_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2831:25: error: 'value' is not a member of 'std::is_trivially_copy_constructible<JSONObject>'
inline constexpr bool is_trivially_copy_constructible_v =
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'struct std::is_literal_type<JSONObject>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:2791:25: required from 'constexpr const bool std::is_literal_type_v<JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:356:33: recursively required from 'union std::__detail::__variant::_Variadic_union<double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:356:33: required from 'union std::__detail::__variant::_Variadic_union<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:413:34: required from 'struct std::__detail::__variant::_Variant_storage<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:458:12: required from 'struct std::__detail::__variant::_Copy_ctor_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:492:12: required from 'struct std::__detail::__variant::_Move_ctor_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:526:12: required from 'struct std::__detail::__variant::_Copy_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:580:12: required from 'struct std::__detail::__variant::_Move_assign_base<false, int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:649:12: required from 'struct std::__detail::__variant::_Variant_base<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:1038:11: required from 'class std::variant<int, double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:22:62: required from here
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits:698:12: error: invalid use of incomplete type 'class JSONObject'
struct is_literal_type
^~~~~~~~~~~~~~~
In file included from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:14,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:\Users\M\CLionProjects\MyJson\my_json\JSONType.h:14:7: note: forward declaration of 'class JSONObject'
class JSONObject;
^~~~~~~~~~
In file included from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/move.h:55,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/bits/nested_exception.h:40,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/exception:144,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ios:39,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/ostream:38,
from C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/iostream:39,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.h:9,
from C:\Users\M\CLionProjects\MyJson\my_json\JSONObject.cpp:5:
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/type_traits: In instantiation of 'constexpr const bool std::is_literal_type_v<JSONObject>':
C:/PROGRA~1/MINGW-~1/X86_64~1.0-P/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/variant:356:33: recursively required from 'union std::__detail::__variant::_Variadic_union<double, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, JSONObject>'
...
mingw32-make.exe[3]: *** [CMakeFiles\MyJson.dir\build.make:75: CMakeFiles/MyJson.dir/my_json/JSONObject.cpp.obj] Error 1
mingw32-make.exe[3]: *** Waiting for unfinished jobs....
mingw32-make.exe[3]: *** [CMakeFiles\MyJson.dir\build.make:88: CMakeFiles/MyJson.dir/my_json/JSONType.cpp.obj] Error 1
mingw32-make.exe[2]: *** [CMakeFiles\Makefile2:75: CMakeFiles/MyJson.dir/all] Error 2
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:82: CMakeFiles/MyJson.dir/rule] Error 2
mingw32-make.exe: *** [Makefile:117: MyJson] Error 2
Each class should know about internal structures (at least size of data) for correct compilation. So, you can't create cycle definition.
Related
I cant for the love of god understand what this compiler error is trying to tell me:
Reproduced here on godbolt: https://godbolt.org/z/v3M5hEbdv
#include "gtest/gtest.h"
#include "gmock/gmock.h"
#include <string>
#include <functional>
#include <vector>
class MyService {
public:
virtual ~MyService() = default;
virtual void bar(
std::function<void (std::vector<std::string>&&)> onSuccess
) = 0;
};
class MyServiceMock : public MyService
{
public:
MOCK_METHOD(
void,
bar,
(std::function<void(std::vector<std::string>&&)> onSuccess),
(override)
);
};
[[maybe_unused]]
void foo() {
testing::NiceMock<MyServiceMock> myService;
EXPECT_CALL(myService, bar(testing::_))
.Times(testing::Exactly(1))
.WillOnce(testing::DoAll(
testing::Return(),
testing::InvokeArgument<0>(
std::vector<std::string>({"hello", "world"})
)
));
}
int main() {
return 0;
}
The compiler error :
Output of x86-64 gcc 11.2 (Compiler #1)
In file included from /opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/bits/unique_ptr.h:37,
from /opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/memory:76,
from /opt/compiler-explorer/libs/googletest/trunk/googletest/include/gtest/gtest.h:55,
from <source>:1:
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple: In instantiation of 'struct std::tuple_element<0, std::tuple<> >':
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/utility:118:11: required by substitution of 'template<long unsigned int __i, class _Tp> using __tuple_element_t = typename std::tuple_element::type [with long unsigned int __i = 0; _Tp = std::tuple<>]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple:1403:5: required by substitution of 'template<long unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_UTypes ...> >&& std::get(const std::tuple<_UTypes ...>&&) [with long unsigned int __i = 0; _Elements = {}]'
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-more-actions.h:515:22: required by substitution of 'template<class ... Args> decltype (testing::internal::InvokeArgument(get<0>(std::forward_as_tuple((forward<Args>)(testing::internal::InvokeArgumentAction<index, Params ...>::operator()::args)...)), declval<const std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&>())) testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::operator()<Args ...>(Args&& ...) const [with Args = {}]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:2466:26: required by substitution of 'template<class _Fn, class ... _Args> static std::__result_of_success<decltype (declval<_Fn>()((declval<_Args>)()...)), std::__invoke_other> std::__result_of_other_impl::_S_test(int) [with _Fn = testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&; _Args = {}]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:2477:55: required from 'struct std::__result_of_impl<false, false, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&>'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:2482:12: [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/bits/std_function.h:344:8: required by substitution of 'template<class _Res, class ... _ArgTypes> template<class _Cond, class _Tp> using _Requires = typename std::enable_if<_Cond::value, _Tp>::type [with _Cond = std::function<void()>::_Callable<testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, std::__invoke_result<testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&> >; _Tp = void; _Res = void; _ArgTypes = {}]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/bits/std_function.h:413:9: required by substitution of 'template<class _Functor, class, class> std::function<void()>::function(_Functor) [with _Functor = testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >; <template-parameter-1-2> = void; <template-parameter-1-3> = <missing>]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:906:30: required from 'struct std::__is_constructible_impl<std::function<void()>, const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&>'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:911:12: required from 'struct std::is_constructible<std::function<void()>, const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&>'
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h:466:7: required by substitution of 'template<class G, class> testing::Action<void(std::function<void(std::vector<std::__cxx11::basic_string<char> >&&)>)>::Action(G&&) [with G = const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&; <template-parameter-1-2> = <missing>]'
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h:1061:56: required from 'testing::internal::DoAllAction<Actions>::operator testing::Action<R(Args ...)>() const [with R = void; Args = {std::function<void(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&&)>}; Actions = {testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >}]'
<source>:33:18: required from here
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple:1360:25: error: static assertion failed: tuple index must be in range
1360 | static_assert(__i < tuple_size<tuple<>>::value,
| ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple:1360:25: note: '(0 < ((long unsigned int)std::integral_constant<long unsigned int, 0>::value))' evaluates to false
In file included from /opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock.h:57,
from <source>:2:
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h: In instantiation of 'testing::internal::DoAllAction<Actions>::operator testing::Action<R(Args ...)>() const [with R = void; Args = {std::function<void(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&&)>}; Actions = {testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >}]':
<source>:33:18: required from here
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h:1061:56: error: could not convert 'std::get<1, testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >(((const testing::internal::DoAllAction<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >*)this)->testing::internal::DoAllAction<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::actions)' from 'std::__tuple_element_t<1, std::tuple<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > > >' {aka 'const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >'} to 'testing::Action<void(std::function<void(std::vector<std::__cxx11::basic_string<char> >&&)>)>'
1061 | std::get<sizeof...(Actions) - 1>(actions)};
| ^
| |
| std::__tuple_element_t<1, std::tuple<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > > > {aka const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >}
ASM generation compiler returned: 1
In file included from /opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/bits/unique_ptr.h:37,
from /opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/memory:76,
from /opt/compiler-explorer/libs/googletest/trunk/googletest/include/gtest/gtest.h:55,
from <source>:1:
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple: In instantiation of 'struct std::tuple_element<0, std::tuple<> >':
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/utility:118:11: required by substitution of 'template<long unsigned int __i, class _Tp> using __tuple_element_t = typename std::tuple_element::type [with long unsigned int __i = 0; _Tp = std::tuple<>]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple:1403:5: required by substitution of 'template<long unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_UTypes ...> >&& std::get(const std::tuple<_UTypes ...>&&) [with long unsigned int __i = 0; _Elements = {}]'
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-more-actions.h:515:22: required by substitution of 'template<class ... Args> decltype (testing::internal::InvokeArgument(get<0>(std::forward_as_tuple((forward<Args>)(testing::internal::InvokeArgumentAction<index, Params ...>::operator()::args)...)), declval<const std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&>())) testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::operator()<Args ...>(Args&& ...) const [with Args = {}]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:2466:26: required by substitution of 'template<class _Fn, class ... _Args> static std::__result_of_success<decltype (declval<_Fn>()((declval<_Args>)()...)), std::__invoke_other> std::__result_of_other_impl::_S_test(int) [with _Fn = testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&; _Args = {}]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:2477:55: required from 'struct std::__result_of_impl<false, false, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&>'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:2482:12: [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/bits/std_function.h:344:8: required by substitution of 'template<class _Res, class ... _ArgTypes> template<class _Cond, class _Tp> using _Requires = typename std::enable_if<_Cond::value, _Tp>::type [with _Cond = std::function<void()>::_Callable<testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, std::__invoke_result<testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&> >; _Tp = void; _Res = void; _ArgTypes = {}]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/bits/std_function.h:413:9: required by substitution of 'template<class _Functor, class, class> std::function<void()>::function(_Functor) [with _Functor = testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >; <template-parameter-1-2> = void; <template-parameter-1-3> = <missing>]'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:906:30: required from 'struct std::__is_constructible_impl<std::function<void()>, const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&>'
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/type_traits:911:12: required from 'struct std::is_constructible<std::function<void()>, const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&>'
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h:466:7: required by substitution of 'template<class G, class> testing::Action<void(std::function<void(std::vector<std::__cxx11::basic_string<char> >&&)>)>::Action(G&&) [with G = const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&; <template-parameter-1-2> = <missing>]'
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h:1061:56: required from 'testing::internal::DoAllAction<Actions>::operator testing::Action<R(Args ...)>() const [with R = void; Args = {std::function<void(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&&)>}; Actions = {testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >}]'
<source>:33:18: required from here
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple:1360:25: error: static assertion failed: tuple index must be in range
1360 | static_assert(__i < tuple_size<tuple<>>::value,
| ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/gcc-11.2.0/include/c++/11.2.0/tuple:1360:25: note: '(0 < ((long unsigned int)std::integral_constant<long unsigned int, 0>::value))' evaluates to false
In file included from /opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock.h:57,
from <source>:2:
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h: In instantiation of 'testing::internal::DoAllAction<Actions>::operator testing::Action<R(Args ...)>() const [with R = void; Args = {std::function<void(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&&)>}; Actions = {testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >}]':
<source>:33:18: required from here
/opt/compiler-explorer/libs/googletest/trunk/googlemock/include/gmock/gmock-actions.h:1061:56: error: could not convert 'std::get<1, testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >(((const testing::internal::DoAllAction<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >*)this)->testing::internal::DoAllAction<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::actions)' from 'std::__tuple_element_t<1, std::tuple<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > > >' {aka 'const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >'} to 'testing::Action<void(std::function<void(std::vector<std::__cxx11::basic_string<char> >&&)>)>'
1061 | std::get<sizeof...(Actions) - 1>(actions)};
| ^
| |
| std::__tuple_element_t<1, std::tuple<testing::PolymorphicAction<testing::internal::ReturnVoidAction>, testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > > > {aka const testing::internal::InvokeArgumentAction<0, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >}
Execution build compiler returned: 1
If I remove the &&and change the argument to the function from a rvalue reference into a copy, it compiles fine. What could be happening here?
It seems it is unable to work with r-value references. The workaround:
EXPECT_CALL(myService, bar(testing::_)).WillOnce(
testing::WithArg<0>(
[] (std::function<void (std::vector<std::string>&&)> f) {
f({"hello", "world"});
}
)
Related issue has been closed for some reasons Add support for move only parameters in mocked methods.
I am using std::variant which is a C++17 feature. But as far as I am aware g++ should support this. I am using g++ version 9.2.1.
The first error summarised is:
json20.hpp:18:48: required from here
/usr/include/c++/9/type_traits:1235:12: error: invalid use of incomplete type ‘struct json_object’
1235 | struct is_trivially_destructible
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from json20.cpp:1:
json20.hpp:17:8: note: forward declaration of ‘struct json_object’
17 | struct json_object {
| ^~~~~~~~~~~
In file included from /usr/include/c++/9/variant:36,
from json20.hpp:5,
from json20.cpp:1:
I am compiling just json.cpp like this:
g++ -c -std=c++17 json20.cpp
This compiles ok on Visual Studio 2017. Although there I had to set the compiler to use c++17 standard. So I assume it should work on g++. Or is there an error in my code?
Here are the source files:
json20.hpp:
#ifndef JSON20_HPP_
#define JSON20_HPP_
#include <variant> // type-safe union
#include <string>
#include <vector>
#include <unordered_map>
#include <iostream>
#include "json_value.hpp"
struct json_array {
std::vector<json_value> array;
};
struct json_object {
std::unordered_map < std::string, json_value> object;
json_value& operator [](std::string key) {
return object[key];
}
};
struct json_null {
};
std::ostream& operator<< (std::ostream& os, json_value const& v);
class json20 {
public:
/* default constructor */
json20() {}
/* construct json object from input stream */
json20(std::istream& istrm, std::string& parse_status);
/* parent node of json object */
json_value root;
bool insert(const json_object& object);
private:
bool parse(std::istream& istrm, std::string& parse_status);
json_value parse_json(std::istream& istrm, json_value& value, std::string& parse_status);
};
#endif // JSON20_HPP_
json20.cpp:
#include "json20.hpp"
std::ostream& operator<< (std::ostream& os, json_value const& v) {
return os;
}
json20::json20(std::istream& istrm, std::string& parse_status) {
}
json_value json20::parse_json(std::istream& istrm, json_value& value, std::string& parse_status) {
return value;
}
bool json20::parse(std::istream& istrm, std::string& parse_status) {
return true;
}
bool json20::insert(const json_object& object) {
return true;
}
json_value.hpp:
#ifndef JSON_VALUE_HPP_
#define JSON_VALUE_HPP_
#include "json20.hpp"
#include <variant>
#include <string>
#include <unordered_map>
// fwd declare
struct json_array;
struct json_object;
struct json_null;
typedef std::variant<double, bool, std::string, json_array, json_object, json_null> json_value;
#endif // JSON_VALUE_HPP_
test.cpp:
#include "json20.hpp"
#include <string>
#include <iostream>
#include <sstream>
#include <unordered_map>
int main() {
const std::string s = "my list";
double arrayofdoubles[] = {1.0, 2.0, 3.0};
json_array jarray;
for (auto i : arrayofdoubles) {
jarray.array.push_back(i);
}
json_object obj;
obj.object[s] = jarray;
json20 json;
json.insert(obj);
//// output to stdout
std::ostringstream ostrm;
ostrm << json.root;
std::string expected("{\"my list\":[1,2,3]}");
std::cout << json.root;
}
The complete error message is huge and I am only able to provide a part of it due to stackoverflow size limits:
acomber#mail:~/Documents/projects/json20$ g++ -c -std=c++17 json20.cpp
In file included from /usr/include/c++/9/variant:36,
from json20.hpp:5,
from json20.cpp:1:
/usr/include/c++/9/type_traits: In instantiation of ‘struct std::is_trivially_destructible<json_object>’:
/usr/include/c++/9/type_traits:2959:25: required from ‘constexpr const bool std::is_trivially_destructible_v<json_object>’
/usr/include/c++/9/variant:286:5: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_dtor’
/usr/include/c++/9/variant:295:4: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_move_assign’
/usr/include/c++/9/variant:677:11: required by substitution of ‘template<class ... _Types> using _Move_assign_alias = std::__detail::__variant::_Move_assign_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_assign, _Types ...> [with _Types = {double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null}]’
/usr/include/c++/9/variant:681:12: required from ‘struct std::__detail::__variant::_Variant_base<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>’
/usr/include/c++/9/variant:1219:11: [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/9/bits/hashtable_policy.h:233:43: required from ‘struct std::__detail::_Hash_node_value_base<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >’
/usr/include/c++/9/bits/hashtable_policy.h:264:12: required from ‘struct std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true>’
/usr/include/c++/9/bits/hashtable_policy.h:2027:13: required from ‘struct std::__detail::_Hashtable_alloc<std::allocator<std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true> > >’
/usr/include/c++/9/bits/hashtable.h:173:11: required from ‘class std::_Hashtable<std::basic_string<char>, std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, std::allocator<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >, std::__detail::_Select1st, std::equal_to<std::basic_string<char> >, std::hash<std::basic_string<char> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >’
/usr/include/c++/9/bits/unordered_map.h:105:18: required from ‘class std::unordered_map<std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >’
json20.hpp:18:48: required from here
/usr/include/c++/9/type_traits:1235:12: error: invalid use of incomplete type ‘struct json_object’
1235 | struct is_trivially_destructible
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from json20.cpp:1:
json20.hpp:17:8: note: forward declaration of ‘struct json_object’
17 | struct json_object {
| ^~~~~~~~~~~
In file included from /usr/include/c++/9/variant:36,
from json20.hpp:5,
from json20.cpp:1:
/usr/include/c++/9/type_traits: In instantiation of ‘constexpr const bool std::is_trivially_destructible_v<json_object>’:
/usr/include/c++/9/variant:286:5: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_dtor’
/usr/include/c++/9/variant:295:4: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_move_assign’
/usr/include/c++/9/variant:677:11: required by substitution of ‘template<class ... _Types> using _Move_assign_alias = std::__detail::__variant::_Move_assign_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_assign, _Types ...> [with _Types = {double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null}]’
/usr/include/c++/9/variant:681:12: required from ‘struct std::__detail::__variant::_Variant_base<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>’
/usr/include/c++/9/variant:1219:11: required from ‘class std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>’
/usr/include/c++/9/bits/stl_pair.h:215:11: [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/9/bits/hashtable_policy.h:233:43: required from ‘struct std::__detail::_Hash_node_value_base<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >’
/usr/include/c++/9/bits/hashtable_policy.h:264:12: required from ‘struct std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true>’
/usr/include/c++/9/bits/hashtable_policy.h:2027:13: required from ‘struct std::__detail::_Hashtable_alloc<std::allocator<std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true> > >’
/usr/include/c++/9/bits/hashtable.h:173:11: required from ‘class std::_Hashtable<std::basic_string<char>, std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, std::allocator<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >, std::__detail::_Select1st, std::equal_to<std::basic_string<char> >, std::hash<std::basic_string<char> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >’
/usr/include/c++/9/bits/unordered_map.h:105:18: required from ‘class std::unordered_map<std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >’
json20.hpp:18:48: required from here
/usr/include/c++/9/type_traits:2959:25: error: ‘value’ is not a member of ‘std::is_trivially_destructible<json_object>’
2959 | inline constexpr bool is_trivially_destructible_v =
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/type_traits: In instantiation of ‘struct std::is_trivially_destructible<json_null>’:
/usr/include/c++/9/type_traits:2959:25: required from ‘constexpr const bool std::is_trivially_destructible_v<json_null>’
/usr/include/c++/9/variant:286:5: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_dtor’
/usr/include/c++/9/variant:295:4: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_move_assign’
/usr/include/c++/9/variant:677:11: required by substitution of ‘template<class ... _Types> using _Move_assign_alias = std::__detail::__variant::_Move_assign_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_assign, _Types ...> [with _Types = {double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null}]’
/usr/include/c++/9/variant:681:12: required from ‘struct std::__detail::__variant::_Variant_base<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>’
/usr/include/c++/9/variant:1219:11: [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/9/bits/hashtable_policy.h:233:43: required from ‘struct std::__detail::_Hash_node_value_base<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >’
/usr/include/c++/9/bits/hashtable_policy.h:264:12: required from ‘struct std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true>’
/usr/include/c++/9/bits/hashtable_policy.h:2027:13: required from ‘struct std::__detail::_Hashtable_alloc<std::allocator<std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true> > >’
/usr/include/c++/9/bits/hashtable.h:173:11: required from ‘class std::_Hashtable<std::basic_string<char>, std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, std::allocator<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >, std::__detail::_Select1st, std::equal_to<std::basic_string<char> >, std::hash<std::basic_string<char> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >’
/usr/include/c++/9/bits/unordered_map.h:105:18: required from ‘class std::unordered_map<std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >’
json20.hpp:18:48: required from here
/usr/include/c++/9/type_traits:1235:12: error: invalid use of incomplete type ‘struct json_null’
1235 | struct is_trivially_destructible
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from json20.hpp:11,
from json20.cpp:1:
json_value.hpp:13:8: note: forward declaration of ‘struct json_null’
13 | struct json_null;
| ^~~~~~~~~
In file included from /usr/include/c++/9/variant:36,
from json20.hpp:5,
from json20.cpp:1:
/usr/include/c++/9/type_traits: In instantiation of ‘constexpr const bool std::is_trivially_destructible_v<json_null>’:
/usr/include/c++/9/variant:286:5: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_dtor’
/usr/include/c++/9/variant:295:4: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_move_assign’
/usr/include/c++/9/variant:677:11: required by substitution of ‘template<class ... _Types> using _Move_assign_alias = std::__detail::__variant::_Move_assign_base<std::__detail::__variant::_Traits<_Types>::_S_trivial_move_assign, _Types ...> [with _Types = {double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null}]’
/usr/include/c++/9/variant:681:12: required from ‘struct std::__detail::__variant::_Variant_base<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>’
/usr/include/c++/9/variant:1219:11: required from ‘class std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>’
/usr/include/c++/9/bits/stl_pair.h:215:11: [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/9/bits/hashtable_policy.h:233:43: required from ‘struct std::__detail::_Hash_node_value_base<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >’
/usr/include/c++/9/bits/hashtable_policy.h:264:12: required from ‘struct std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true>’
/usr/include/c++/9/bits/hashtable_policy.h:2027:13: required from ‘struct std::__detail::_Hashtable_alloc<std::allocator<std::__detail::_Hash_node<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, true> > >’
/usr/include/c++/9/bits/hashtable.h:173:11: required from ‘class std::_Hashtable<std::basic_string<char>, std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >, std::allocator<std::pair<const std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> > >, std::__detail::_Select1st, std::equal_to<std::basic_string<char> >, std::hash<std::basic_string<char> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >’
/usr/include/c++/9/bits/unordered_map.h:105:18: required from ‘class std::unordered_map<std::basic_string<char>, std::variant<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null> >’
json20.hpp:18:48: required from here
/usr/include/c++/9/type_traits:2959:25: error: ‘value’ is not a member of ‘std::is_trivially_destructible<json_null>’
2959 | inline constexpr bool is_trivially_destructible_v =
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/type_traits: In instantiation of ‘struct std::__is_trivially_move_constructible_impl<json_object, true>’:
/usr/include/c++/9/type_traits:1185:12: required from ‘struct std::is_trivially_move_constructible<json_object>’
/usr/include/c++/9/type_traits:2947:25: required from ‘constexpr const bool std::is_trivially_move_constructible_v<json_object>’
/usr/include/c++/9/variant:290:5: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_move_ctor’
/usr/include/c++/9/variant:295:23: required from ‘constexpr const bool std::__detail::__variant::_Traits<double, bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, json_array, json_object, json_null>::_S_trivial_move_assign’
/usr/include/c++/9/variant:677:11: required by substitution of ‘template<class ... _Types>
Something interesting is that if I replace std::unordered_map with std::map then it compiles ok. Why?
I can't figure out how to do it; it's driving me nuts.
#include <iostream>
#include <memory>
#include <map>
int main()
{
std::map<std::string, std::unique_ptr<std::string>> map;
std::unique_ptr<std::string> bar(new std::string("bar"));
map["foo"] = std::move(bar);
std::cout << "foo: " << *(map["foo"]) << std::endl;
}
This compiles just fine on gcc v4.9.2:
$ g++ -std=c++0x test.cc -o test
Unfortunately, all I have available to me is gcc v4.4.7, which produces a hideous error message that I'll stick at the bottom.
I can push_back unique_ptrs into vectors just fine; I don't understand why there's an issue with map.
I've also tried using insert:
int main()
{
std::map<std::string, std::unique_ptr<std::string>> map;
std::unique_ptr<std::string> bar(new std::string("bar"));
auto pair = std::make_pair("foo", std::move(bar));
map.insert(std::move(pair));
std::cout << "foo: " << *(map["foo"]) << std::endl;
}
I can make the pair just fine, but when I try to move it into insert I get the error. It appears that it's trying to call the copy constructor for some reason, but I don't understand why, since I'm moveing it.
emplace has the same result:
int main()
{
std::map<std::string, std::unique_ptr<std::string>> map;
std::unique_ptr<std::string> bar(new std::string("bar"));
auto pair = std::make_pair("foo", std::move(bar));
map.emplace(std::move(pair));
std::cout << "foo: " << *(map["foo"]) << std::endl;
}
Both of these compile fine in g++ v4.9.2, but not in v4.4.7.
Anyone have any ideas on an alternative way to do this (in v4.4.7)?
Full error message output (from the first example):
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_algobase.h:66,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/char_traits.h:41,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ios:41,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ostream:40,
from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/iostream:40,
from test.cc:1:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/unique_ptr.h: In copy constructor 'std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::pair(const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&)':
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_pair.h:68: instantiated from 'std::_Rb_tree_node<_Val>::_Rb_tree_node(_Args&& ...) [with _Args = const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&, _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/ext/new_allocator.h:111: instantiated from 'void __gnu_cxx::new_allocator<_Tp>::construct(_Tp*, _Args&& ...) [with _Args = const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&, _Tp = std::_Rb_tree_node<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_tree.h:394: instantiated from 'std::_Rb_tree_node<_Val>* std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_create_node(_Args&& ...) [with _Args = const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&, _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, _KeyOfValue = std::_Select1st<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >, _Compare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_tree.h:881: instantiated from 'std::_Rb_tree_iterator<_Val> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_(const std::_Rb_tree_node_base*, const std::_Rb_tree_node_base*, const _Val&) [with _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, _KeyOfValue = std::_Select1st<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >, _Compare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_tree.h:1215: instantiated from 'std::_Rb_tree_iterator<_Val> std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_insert_unique_(std::_Rb_tree_const_iterator<_Val>, const _Val&) [with _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, _KeyOfValue = std::_Select1st<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >, _Compare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_map.h:540: instantiated from 'typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename _Alloc::rebind<std::pair<const _Key, _Tp> >::other>::iterator std::map<_Key, _Tp, _Compare, _Alloc>::insert(typename std::_Rb_tree<_Key, std::pair<const _Key, _Tp>, std::_Select1st<std::pair<const _Key, _Tp> >, _Compare, typename _Alloc::rebind<std::pair<const _Key, _Tp> >::other>::iterator, const std::pair<const _Key, _Tp>&) [with _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Tp = std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, _Compare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_map.h:450: instantiated from '_Tp& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const _Key&) [with _Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Tp = std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, _Compare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >]'
test.cc:9: instantiated from here
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/unique_ptr.h:214: error: deleted function 'std::unique_ptr<_Tp, _Tp_Deleter>::unique_ptr(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Tp_Deleter = std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >]'
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_pair.h:68: error: used here
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/map:60,
from test.cc:3:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_tree.h: In constructor 'std::_Rb_tree_node<_Val>::_Rb_tree_node(_Args&& ...) [with _Args = const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&, _Val = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >]':
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_tree.h:136: note: synthesized method 'std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::pair(const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&)' first required here
GCC 4.4.7 does not provide full support for C++ 11 features, so it is unrealistic to expect all C++ 11 features to work properly. In this particular case, the compiler is not generating move assignment and move copy methods for you. So, when std::map attempts assignment or copy, it uses the regular default ones, which are deleted for unique_ptr.
If you just need a smart pointer, you can use shared_ptr instead.
std::map<std::string, std::shared_ptr<std::string>> map;
std::shared_ptr<std::string> bar = std::make_shared<std::string>("bar");
map["foo"] = bar;
I have looked into the issue. STL implementation for map correctly has a move constructor defined in it:
#ifdef __GXX_EXPERIMENTAL_CXX0X__
template<typename... _Args>
_Rb_tree_node(_Args&&... __args)
: _Rb_tree_node_base(),
_M_value_field(std::forward<_Args>(__args)...) { }
#endif
};
Moreover, this is called, as stated in the error output. std::pair has move constructor defined as well, but this one is not called.
I believe, std::forward and deduced type of Args is at fault:
usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_tree.h:
In constructor ‘std::_Rb_tree_node<_Val>::_Rb_tree_node(_Args&& ...)
[with _Args = const std::pair<..., std::unique_ptr<...> >&,
As you see, type of _Args is a const reference, which is forwarded by forward, and regular pair constructor is called.
I assume, one might fiddle with stl_tree.h to fix it - for example, by removing std::forward and just casting the arg to rvalue reference. This would not be correct, of course, but might work for specific case.
I can't find what I'm doing wrong here. The function eta does what I ask but when I use it in the loop I get the attached error.
bool eta(map<string, TLorentzVector> map_jets, string jet){
return( fabs(map_jets[jet].PseudoRapidity()) > 2.5 );
}
and then
vector<pair<string,double> > jets_pt( vec_jets.size() );
for( vector<pair<string,double> >::iterator it = jets_pt.begin(); it != jets_pt.end(); ++it)
jets_pt.erase(remove_if(jets_pt.begin(),jets_pt.end(),eta(map_jets,it1->first)),jets_pt.end);
I get the error
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h: In function '_OutputIterator std::remove_copy_if(_InputIterator, _InputIterator, _OutputIterator, _Predicate) [with _InputIterator = __gnu_cxx::__normal_iterator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>*, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double> > > >, _OutputIterator = __gnu_cxx::__normal_iterator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>*, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double> > > >, _Predicate = bool]':
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:1291: instantiated from '_ForwardIterator std::remove_if(_ForwardIterator, _ForwardIterator, _Predicate) [with _ForwardIterator = __gnu_cxx::__normal_iterator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>*, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double> > > >, _Predicate = bool]'
/misc/cdf/gbertoli/hww/Diboson_v20_taus/Ana/src/Functions.cc:25: instantiated from here
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:1216: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h: In function '_RandomAccessIterator std::__find_if(_RandomAccessIterator, _RandomAccessIterator, _Predicate, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>*, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double> > > >, _Predicate = bool]':
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:338: instantiated from '_InputIterator std::find_if(_InputIterator, _InputIterator, _Predicate) [with _InputIterator = __gnu_cxx::__normal_iterator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>*, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double> > > >, _Predicate = bool]'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:1287: instantiated from '_ForwardIterator std::remove_if(_ForwardIterator, _ForwardIterator, _Predicate) [with _ForwardIterator = __gnu_cxx::__normal_iterator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>*, std::vector<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double>, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double> > > >, _Predicate = bool]'
/misc/cdf/gbertoli/hww/Diboson_v20_taus/Ana/src/Functions.cc:25: instantiated from here
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:260: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:264: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:268: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:272: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:280: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:284: error: '__pred' cannot be used as a function
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/stl_algo.h:288: error: '__pred' cannot be used as a function
mv: cannot stat `/misc/cdf/gbertoli/hww/Diboson_v20_taus/tmp/Linux2.6-GCC_4_1/Ana/srt_dep_tmp.27294': No such file or directory
gmake[2]: *** [/misc/cdf/gbertoli/hww/Diboson_v20_taus/tmp/Linux2.6-GCC_4_1/Ana/libAna-shared/Functions.o] Error 1
gmake[1]: *** [src.lib] Error 2
gmake: *** [Ana.all] Error 2
First off, the only valid signature for remove_if takes a single function as the predicate argument:
jets_pt.erase(std::remove_if(jets_pt.begin(), jets_pt.end(), eta),
jets_pt.end());
This means that eta must be a function returning bool and taking precisely one argument whose type is the value type of the container:
bool eta(const std::pair<string, double> & p)
{
// do something useful with p
}
If this doesn't fit your bill because you need additional state information in the predicate, then you need to make it a function object:
struct Eta
{
const std::map<string, TLorentzVector> & map_jets;
Eta(const std::map<string, TLorentzVector> & m) : map_jets(m) { }
bool operator()(const std::pair<string, double> & p) const
{
std::map<string, TLorentzVector>::const_iterator it = map_jets.find(p->second);
return it == map_jets.end() ?
false :
std::fabs(it->second.PseudoRapidity()) > 2.5;
}
};
Now you have to use remove_if with an instance of Eta:
jets_pt.erase(std::remove_if(jets_pt.begin(), jets_pt.end(), Eta(map_jets)),
jets_pt.end()); // ^^^^^^^^^^^^^
Note that your use of the for loop is extremely suspicious; you should double-check that.
std::remove_if takes a value of the contained type (bool pred (container::value_type), or a functor which overloads operator() appropriately).
For std::map, you have to do it like explained here remove_if equivalent for std::map .
You're passing a bool (the results of calling eta) to remove_if as
the third argument. You need to pass it a predicate: a pointer to a
function taking a single argument and returning something which can be
converted to a bool, or a functional object. In the error messages,
__pred is your third argument; remove_if calls it here with a
pair<string, double>, and expects a bool in return. You have to
provide something which can be called like this. (You might want to
look into boost::bind.)
And BTW: passing a map by value to eta might not be a good idea.
It's going to slow things down considerably if the map is big.
I am having a bit of trouble deep copying a pointer to a map of pointer values.
std::map<string, TH1D*>* m_hist_split;
My current method:
I am using a class template that copies the map pair and initializes the value of the pair on the heap. the template then returns a map::type_value
#ifndef DEEPCOPY_H
#define DEEPCOPY_H
#include <map>
#include <algorithm>
namespace DeepCopy{
template<class A, class B>
struct MapPointerValue{
typedef typename std::map< A, B* >::value_type map_t;
map_t operator() (map_t p){
return std::make_pair(p.first, new B(*p.second) );
}
};
...
...
}
#endif
Inside my copy constructor I then attempt to deep copy my pointer to a map of pointer values.
Cutflow::Cutflow(const Cutflow& cpy){
m_hist_split = new map<string, TH1D*>;
transform(cpy.m_hist_split->begin(),cpy.m_hist_split->end(), inserter(m_hist_split, m_hist_split->begin()), DeepCopy::MapPointerValue<string, TH1D>() );
...
...
}
When compiling I then get an ugly error :-( :
Compiling src/Cutflow.cxx to obj/Cutflow.o
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h: In instantiation of 'std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>':
src/Cutflow.cxx:42: instantiated from here
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:562: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:572: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:599: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:608: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h: In function 'std::insert_iterator<_Container> std::inserter(_Container&, _Iterator) [with _Container = std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*, _Iterator = std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> >]':
src/Cutflow.cxx:42: instantiated from here
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:648: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_algo.h: In function '_OIter std::transform(_IIter, _IIter, _OIter, _UnaryOperation) [with _IIter = std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> >, _OIter = std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>, _UnaryOperation = DeepCopy::MapPointerValue<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D>]':
src/Cutflow.cxx:42: instantiated from here
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_algo.h:4281: error: no match for 'operator=' in '__result.std::insert_iterator<_Container>::operator* [with _Container = std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*]() = DeepCopy::MapPointerValue<A, B>::operator()(typename std::map<A, B*, std::less<_Key>, std::allocator<std::pair<const A, B*> > >::value_type) [with A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = TH1D](std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>(((const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>&)((const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>*)__first.std::_Rb_tree_iterator<_Tp>::operator* [with _Tp = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>]()))))'
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:559: note: candidates are: std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>& std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>::operator=(const std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>&)
Any ideas what I am doing wrong.
Also,
is what I am doing correct?
:-D
In the following line
transform(cpy.m_hist_split->begin(),cpy.m_hist_split->end(), inserter(m_hist_split, m_hist_split->begin()), DeepCopy::MapPointerValue<string, TH1D>() );
you have mistakenly called the inserter function with a pointer to a map as the first parameter instead of a reference.
For completeness, inserter is defined in §24.5.2.6.5 like this:
template <class Container>
insert_iterator<Container> inserter(Container& x, typename Container::iterator i);
Returns: insert_iterator(x, i)
In this case, a simple typo caused a big headache.