/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<int (X::*)(double), const X*, float>':
/home/zao/Downloads/ideone_RzgXKM.cpp:65:68:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: invalid conversion from 'const X*' to 'X*' [-fpermissive]
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct detail::is_callable_impl<int (X::*)(double), void(const X*, float), void>':
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12:   required from 'struct is_callable<int (X::*)(double), const X*, float>'
/home/zao/Downloads/ideone_RzgXKM.cpp:65:68:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:46:9: error: invalid conversion from 'const X*' to 'X*' [-fpermissive]
/home/zao/Downloads/ideone_RzgXKM.cpp:46:9: error: invalid conversion from 'const X*' to 'X*' [-fpermissive]
/home/zao/Downloads/ideone_RzgXKM.cpp: In function 'int main()':
/home/zao/Downloads/ideone_RzgXKM.cpp:65:5: error: static assertion failed: 
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<int (X::*)(double), const X&, float>':
/home/zao/Downloads/ideone_RzgXKM.cpp:67:68:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: invalid conversion from 'const X*' to 'X*' [-fpermissive]
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct detail::is_callable_impl<int (X::*)(double), void(const X&, float), void>':
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12:   required from 'struct is_callable<int (X::*)(double), const X&, float>'
/home/zao/Downloads/ideone_RzgXKM.cpp:67:68:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:46:9: error: invalid conversion from 'const X*' to 'X*' [-fpermissive]
/home/zao/Downloads/ideone_RzgXKM.cpp:46:9: error: invalid conversion from 'const X*' to 'X*' [-fpermissive]
/home/zao/Downloads/ideone_RzgXKM.cpp:67:5: error: static assertion failed: 
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&), int>':
/home/zao/Downloads/ideone_RzgXKM.cpp:80:48:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&), int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:81:48:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&), const int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:82:55:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&), int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:83:50:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&), const int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:84:56:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&)>()' cannot be used as a member pointer, since it is of type 'void(int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&), int>':
/home/zao/Downloads/ideone_RzgXKM.cpp:86:53:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&), int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:87:54:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&), const int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:88:60:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&), int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:89:55:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&), const int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:90:61:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&)>()' cannot be used as a member pointer, since it is of type 'void(const int&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&&), int>':
/home/zao/Downloads/ideone_RzgXKM.cpp:92:48:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&&), int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:93:50:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&&), const int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:94:56:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&&), int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:95:50:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(int&&), const int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:96:57:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(int&&)>()' cannot be used as a member pointer, since it is of type 'void(int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&&), int>':
/home/zao/Downloads/ideone_RzgXKM.cpp:98:54:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&&), int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:99:56:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&&), const int&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:100:62:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&&), int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:101:56:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp: In instantiation of 'struct is_callable<void(const int&&), const int&&>':
/home/zao/Downloads/ideone_RzgXKM.cpp:102:62:   required from here
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'
/home/zao/Downloads/ideone_RzgXKM.cpp:50:12: error: 'std::declval<void(const int&&)>()' cannot be used as a member pointer, since it is of type 'void(const int&&)'