operator<<(std::basic_string_view)

Since C++17

Header: <string_view>

Behaves as a FormattedOutputFunction. After constructing and checking the sentry object, determines the output format padding.

# Declarations

template< class CharT, class Traits >
std::basic_ostream<CharT, Traits>&
operator<<( std::basic_ostream<CharT, Traits>& os,
std::basic_string_view<CharT, Traits> v );

(since C++17)

# Parameters

# Return value

os

# Example

#include <iomanip>
#include <iostream>
#include <string_view>
 
int main()
{
    constexpr std::string_view s{"abc"};
    constexpr int width{5};
 
    // fill/left/right properties are kept until changed
    std::cout << std::setfill('-');
    std::cout << std::left;
 
    std::cout << '[' << std::setw(width) << s << "]\n";
    std::cout << '[' << std::setw(width) << s << "]\n";
 
    std::cout << std::right;
    std::cout << '[' << std::setw(width) << s << "]\n";
 
    // width is reset after each call
    std::cout << '[' << s << "]\n";
}

# See also