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std::experimental::source_location::column - cppreference.com

From cppreference.com

constexpr std::uint_least32_t column() const noexcept;
(library fundamentals TS v2)

Returns an implementation-defined value representing some offset from the start of the line represented by this object (i.e., the column number).

Parameters

(none)

Return value

An implementation-defined value representing some offset from the start of the line represented by this object (i.e., the column number).

Example

#include <experimental/source_location>
#include <iostream>

template<typename T = std::experimental::source_location>
inline void pos(const T& location = T::current())
{
    std::cout
        << "("
        << location.line()
        << ':' 
        << location.column()
        << ") ";
}

int main()
{
    pos(); std::cout << "Proxima\n";
    pos(); std::cout << "Centauri\n";
}

Possible output: 

(17:5) Proxima
(18:5) Centauri

See also

return the line number represented by this object
(public member function) [edit]
return the file name represented by this object
(public member function) [edit]
return the name of the function represented by this object, if any
(public member function) [edit]