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      std::pair::swap

      De cppreference.com

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      <metanoindex/>

       
      C++
       
      Biblioteca de utilitários
      Digite apoio (basic types, RTTI, type traits)
      Gerenciamento de memória dinâmica
      De tratamento de erros
      Utilidades do programa
      Variadic funções
      Data e hora
      Objetos de função
      (C++11)
      (C++11)
      Os operadores relacionais
      Original:
      Relational operators
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      rel_ops::operator!=
      rel_ops::operator>
      rel_ops::operator<=
      rel_ops::operator>=
      Pares e tuplas
      Original:
      Pairs and tuples
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      (C++11)
      (C++11)
      (C++11)
      Troque, avançar e avançar
      Original:
      Swap, forward and move
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
       
      std::pair
      Funções de membro
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      Member functions
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      pair::pair
      pair::operator=
      pair::swap
      Não-membros funções
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      Non-member functions
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      (C++11)
      Classes auxiliares
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      Helper classes
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      (C++11)
      (C++11)
       
      <tbody> </tbody>
      void swap(pair& other);
      		 (desde C++11)
      Trocas first com other.first e second com other.second.
      Original:
      Swaps first with other.first and second with other.second.
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      Parâmetros

      other -
      par de valores para trocar
      Original:
      pair of values to swap
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      Valor de retorno

      (Nenhum)
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      (none)
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      Exceções

      noexcept specification:  (desde C++11)
      <tbody> </tbody>
      noexcept( noexcept(std::swap(first, p.first)) && noexcept(std::swap(second, p.second)) )

      Exemplo

      #include <iostream>
#include <utility>
#include <string>
int main()
{
    std::pair<int, std::string> p1, p2;
    p1 = std::make_pair(10, "test");
    p2.swap(p1);
    std::cout << "(" << p2.first << ", " << p2.second << ")\n";
}

      Saída: 

      (10, test)

      Veja também