W3cubDocs

/C++

std::source_location::column

constexpr std::uint_least32_t column() const noexcept;
(since C++20)

Returns an implementation-defined value representing some offset from the start of the line represented by this object (i.e., the column number). Column numbers are presumed to be 1-indexed.

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).

An implementation is encouraged to use 0 when the column number is unknown.

Example

#include <iostream>
#include <source_location>
 
template<typename T = std::source_location>
inline void pos(const T& location = T::current())
{
    std::cout
        << "("
        << location.line()
        << ':' 
        << location.column()
        << ") ";
}
 
int main()
{
//      ↓: column #9
    pos(); std::cout << "Proxima\n";    // row #18
      pos(); std::cout << "Centauri\n"; // row #19
//        ↑: column #11
}

Possible output:

(18:9) Proxima
(19:11) Centauri

See also

return the line number represented by this object
(public member function)
return the file name represented by this object
(public member function)
return the name of the function represented by this object, if any
(public member function)
Filename and line information

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/utility/source_location/column