std::basic_string<CharT,Traits,Allocator>::append_range

template< container-compatible-range<CharT> R >
constexpr std::basic_string& append_range( R&& rg );

(since C++23)

Appends all characters from the range rg.

Equivalent to

return append(std::basic_string( std::from_range, std::forward<R>(rg), get_allocator()));

Parameters

a container compatible range

Return value

*this

Complexity

Linear in size of rg.

Exceptions

If the operation would result in size() > max_size(), throws std::length_error.

If an exception is thrown for any reason, this function has no effect (strong exception safety guarantee).

Notes

Feature-test macro	Value	Std	Feature
`__cpp_lib_containers_ranges`	202202L	(C++23)	member functions that accept container compatible range

Example

#include <cassert>
#include <string>
 
int main()
{
    std::string head{"long long"};
    const auto tail = {' ', 'i', 'n', 't'};
 
#ifdef __cpp_lib_containers_ranges
    head.append_range(tail);
#else
    head.append(tail.begin(), tail.end());
#endif
 
    assert(head == "long long int");
}