2. リファレンス
3. spanstream
4. basic_spanstream
5. span

最終更新日時: 2025年08月11日 15時35分16秒 (JST)
suomesta が更新

履歴 編集

std::basic_spanstream::span(C++23)

std::span<charT> span() const noexcept; // (1)

void span(std::span<charT> s) noexcept; // (2)

#include <iostream>
#include <span>
#include <spanstream>

int main()
{
  char buf1[32] = "default";
  std::span<char> span1{buf1};
  std::spanstream ss{span1};

  // (1)
  std::span<char> read = ss.span();

  std::cout << "(1)" << std::endl;
  std::cout << read.data() << std::endl;
  std::cout << std::endl;

  char buf2[32] = "overwritten";
  std::span<char> span2{buf2};

  // (2)
  ss.span(span2);

  std::cout << "(2)" << std::endl;
  std::cout << ss.span().data() << std::endl;
}

(1)
default

(2)
overwritten