std::source_location::column

 

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std::source_location

Member functions

Creation

source_location::source_location

source_location::current

Field access

source_location::line

source_location::column

source_location::file_name

source_location::function_name

 

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

Run this code

#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

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

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