table of contents
std::experimental::source_location::line(3) | C++ Standard Libary | std::experimental::source_location::line(3) |
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 <string_view>
#include <iostream>
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;
}
auto main() -> int
{
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)
2022.07.31 | http://cppreference.com |