Namespaces
Variants
Views
Actions

std::source_location::column

From cppreference.com
 
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
Integer comparison functions
(C++20)(C++20)(C++20)   
(C++20)
Swap and type operations
(C++14)
(C++11)

(C++11)
(C++11)
(C++17)
Common vocabulary types
(C++11)
(C++17)
(C++17)
(C++17)
(C++11)
(C++17)

Elementary string conversions
(C++17)
(C++17)
Stacktrace
 
 
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.

Contents

[edit] Parameters

(none)

[edit] 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.

[edit] 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

[edit] 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]
C++ documentation for Filename and line information