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

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< cpp‎ | string‎ | basic string
 
 
 
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basic_string::append_range
(C++23)
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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()));

Contents

[edit] Parameters

rg - a container compatible range

[edit] Return value

*this

[edit] Complexity

Linear in size of rg.

[edit] 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).

[edit] Notes

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

[edit] 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");
}

[edit] See also

appends characters to the end
(public member function) [edit]