C++ object with thread member initialization issue (invoker ?) [duplicate] - c++

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Start thread with member function
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Passing object by reference to std::thread in C++11
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Closed 3 years ago.
it is kinda late where I am now & I dont have much experience with threading so I may be overlooking something obvious... But I made a small example of what my error is :
Source Code :
#include <thread>
struct B {
/* Stuff */
};
struct A {
std::thread td;
A(const B& b) { td = std::thread(&A::f, b); }
void f(const B& b) { /* DO SOMETHING WTIH b */ }
};
int main() {
B b;
A a(b);
}
Compiling with g++ -c smallex.cpp and I dont really understand what my issue is here. I think it is pretty straight forward what I am trying to accomplish here..
In file included from smallex.cpp:1:0:
/usr/include/c++/7/thread: In instantiation of ‘struct std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >’:
/usr/include/c++/7/thread:127:22: required from ‘std::thread::thread(_Callable&&, _Args&& ...) [with _Callable = void (A::*)(const B&); _Args = {const B&}]’
smallex.cpp:11:42: required from here
/usr/include/c++/7/thread:240:2: error: no matching function for call to ‘std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >::_M_invoke(std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >::_Indices)’
operator()()
^~~~~~~~
/usr/include/c++/7/thread:231:4: note: candidate: template<long unsigned int ..._Ind> decltype (std::__invoke((_S_declval<_Ind>)()...)) std::thread::_Invoker<_Tuple>::_M_invoke(std::_Index_tuple<_Ind ...>) [with long unsigned int ..._Ind = {_Ind ...}; _Tuple = std::tuple<void (A::*)(const B&), B>]
_M_invoke(_Index_tuple<_Ind...>)
^~~~~~~~~
/usr/include/c++/7/thread:231:4: note: template argument deduction/substitution failed:
/usr/include/c++/7/thread: In substitution of ‘template<long unsigned int ..._Ind> decltype (std::__invoke(_S_declval<_Ind>()...)) std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >::_M_invoke<_Ind ...>(std::_Index_tuple<_Ind1 ...>) [with long unsigned int ..._Ind = {0, 1}]’:
/usr/include/c++/7/thread:240:2: required from ‘struct std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >’
/usr/include/c++/7/thread:127:22: required from ‘std::thread::thread(_Callable&&, _Args&& ...) [with _Callable = void (A::*)(const B&); _Args = {const B&}]’
smallex.cpp:11:42: required from here
/usr/include/c++/7/thread:233:29: error: no matching function for call to ‘__invoke(std::__tuple_element_t<0, std::tuple<void (A::*)(const B&), B> >, std::__tuple_element_t<1, std::tuple<void (A::*)(const B&), B> >)’
-> decltype(std::__invoke(_S_declval<_Ind>()...))
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/7/tuple:41:0,
from /usr/include/c++/7/bits/unique_ptr.h:37,
from /usr/include/c++/7/memory:80,
from /usr/include/c++/7/thread:39,
from smallex.cpp:1:
/usr/include/c++/7/bits/invoke.h:89:5: note: candidate: template<class _Callable, class ... _Args> constexpr typename std::__invoke_result<_Functor, _ArgTypes>::type std::__invoke(_Callable&&, _Args&& ...)
__invoke(_Callable&& __fn, _Args&&... __args)
^~~~~~~~
/usr/include/c++/7/bits/invoke.h:89:5: note: template argument deduction/substitution failed:
/usr/include/c++/7/bits/invoke.h: In substitution of ‘template<class _Callable, class ... _Args> constexpr typename std::__invoke_result<_Functor, _ArgTypes>::type std::__invoke(_Callable&&, _Args&& ...) [with _Callable = void (A::*)(const B&); _Args = {B}]’:
/usr/include/c++/7/thread:233:29: required by substitution of ‘template<long unsigned int ..._Ind> decltype (std::__invoke(_S_declval<_Ind>()...)) std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >::_M_invoke<_Ind ...>(std::_Index_tuple<_Ind1 ...>) [with long unsigned int ..._Ind = {0, 1}]’
/usr/include/c++/7/thread:240:2: required from ‘struct std::thread::_Invoker<std::tuple<void (A::*)(const B&), B> >’
/usr/include/c++/7/thread:127:22: required from ‘std::thread::thread(_Callable&&, _Args&& ...) [with _Callable = void (A::*)(const B&); _Args = {const B&}]’
smallex.cpp:11:42: required from here
/usr/include/c++/7/bits/invoke.h:89:5: error: no type named ‘type’ in ‘struct std::__invoke_result<void (A::*)(const B&), B>’
Can someone please help point me in the right direction?
Notes :
g++ --version
g++ (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0
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