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

`size_type copy( CharT* dest, size_type count, size_type pos = 0 ) const;`		(C++20)
`constexpr size_type copy( CharT* dest, size_type count, size_type pos = 0 ) const;`		(C++20)

[pos, pos+count) dest count == npos [pos, size())

pos > size() std::out_of_range

dest	-
count	-
pos	-

pos > size() std::out_of_range

count

Run this code

#include <string>
#include <iostream>

int main()
{
  std::string foo("quuuux");
  char bar[7]{};
  foo.copy(bar, sizeof bar);
  std::cout << bar << '\n';
}

:

quuuux

substr

() [edit]






(C++20)





(C++20)




(C++17)
(C++11)
(C++11)
(C++11)

cppreference.com

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