NAME¶

std::experimental::source_location::line - std::experimental::source_location::line

Synopsis¶

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

Returns the line number represented by this object.

Parameters¶

(none)

Return value¶

The line number represented by this object.

Example¶

// Run this code

#include <experimental/source_location>
#include <iostream>
#include <string_view>
using std::experimental::source_location;

inline void cur_line(
const std::string_view message = "",
const source_location& location = source_location::current())
{
std::cout
<< location.line() // <- the call-site line #
<< ") "
<< message;
}

int main()
{
cur_line("++" "\n");
cur_line(); std::cout << "Hello," "\n";
cur_line(); std::cout << "C++20!" "\n";
cur_line("--" "\n");
}

Output:¶

18) ++
19) Hello,
20) C++20!
21) --

See also¶

column return the column 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)
C++ documentation for
Filename and line information