std::basic_string<CharT,Traits,Allocator>::assign_range
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basic_string::assign_range
(C++23)
(DR*)
(DR*)
(C++23)
(DR*)
(C++23)
(C++23)
(C++20)
(C++20)
(C++23)
(C++20)(C++20)
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
(C++11)(C++11)(C++11)
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(C++14)
(C++11)
template< container-compatible-range <CharT> R >
constexpr std::basic_string & assign_range( R&& rg );
(since C++23)
constexpr std::basic_string & assign_range( R&& rg );
Replaces the contents of the string with the values in the range rg.
Equivalent to
return assign( std::basic_string ( std::from_range, std::forward<R>(rg), get_allocator()) );
[edit] Parameters
rg
-
a container compatible range
[edit] Return value
*this
[edit] Complexity
Linear in size of rg.
[edit] Exceptions
If the operation would cause size() to exceed 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
Run this code
#include <cassert> #include <string> int main() { const auto source = {'s', 'o', 'u', 'r', 'c', 'e'}; std::string destination{"destination"}; #ifdef __cpp_lib_containers_ranges destination.assign_range(source); #else destination.assign(source.begin(), source.end()); #endif assert (destination == "source"); }