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std::tuple

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C++
 
Утилиты библиотеки
 
std::tuple
Член функций
Original:
Member functions
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tuple::tuple
tuple::operator=
tuple::swap
Не являющиеся членами функций
Original:
Non-member functions
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make_tuple
tie
forward_as_tuple
None
operator=
operator!=
operator<
operator<=
operator>
operator>=
std::swap
get
Вспомогательные классы
Original:
Helper classes
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tuple_size
tuple_element
uses_allocator
ignore
 
Заголовочный файл <tuple>
template< class... Types >
class tuple;
 (начиная с C++11)
std::tuple класса шаблона коллекции фиксированного размера гетерогенной значения. Это обобщение std::pair.
Original:
Class template std::tuple is a fixed-size collection of heterogeneous values. It is a generalization of std::pair.
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Содержание

[править] Член функций
создает новый tuple
Original:
constructs a new tuple
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(public функция-член)
присваивает содержимое одного tuple к другому
Original:
assigns the contents of one tuple to another
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(public функция-член)
Меняет местами содержимое двух tuples
Original:
swaps the contents of two tuples
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(public функция-член)

[править] Не являющиеся членами функций
tuple создает объект типа определяются типы аргументов
Original:
creates a tuple object of the type defined by the argument types
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(шаблон функции) [edit]
создает tuple ссылок именующее или распаковывает кортеж на отдельные объекты
Original:
creates a tuple of lvalue references or unpacks a tuple into individual objects
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(шаблон функции) [edit]
создает tuple из RValue ссылки
Original:
creates a tuple of rvalue references
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(шаблон функции) [edit]
создает tuple путем объединения любого количества наборов
Original:
creates a tuple by concatenating any number of tuples
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(шаблон функции) [edit]
кортежа доступ к указанным элементом
Original:
tuple accesses specified element
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(шаблон функции) [edit]
лексикографически сравнивает значения в кортеже
Original:
lexicographically compares the values in the tuple
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(шаблон функции) [edit]
(C++11)
Специализируется std::swap алгоритм
Original:
specializes the std::swap algorithm
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(шаблон функции) [edit]

[править] Вспомогательные классы
получает размер tuple во время компиляции
Original:
obtains the size of tuple at compile time
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(специализация шаблона класса) [edit]
получает тип указанного элемента
Original:
obtains the type of the specified element
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(специализация шаблона класса) [edit]
(C++11)
Специализируется черта std::uses_allocator типа
Original:
specializes the std::uses_allocator type trait
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(специализация шаблона класса) [edit]
заполнителя, чтобы пропустить элемент при распаковке tuple использованием tie
Original:
placeholder to skip an element when unpacking a tuple using tie
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(константа) [edit]

[править] Пример

#include <tuple>
#include <iostream>
#include <string>
#include <stdexcept>
 
std::tuple<double, char, std::string> get_student(int id)
{
    if (id == 0) return std::make_tuple(3.8, 'A', "Lisa Simpson");
    if (id == 1) return std::make_tuple(2.9, 'C', "Milhouse Van Houten");
    if (id == 2) return std::make_tuple(1.7, 'D', "Ralph Wiggum");
    throw std::invalid_argument("id");
}
 
int main()
{
    auto student0 = get_student(0);
    std::cout << "ID: 0, "
              << "GPA: " << std::get<0>(student0) << ", "
              << "grade: " << std::get<1>(student0) << ", "
              << "name: " << std::get<2>(student0) << '\n';
 
    double gpa1;
    char grade1;
    std::string name1;
    std::tie(gpa1, grade1, name1) = get_student(1);
    std::cout << "ID: 1, "
              << "GPA: " << gpa1 << ", "
              << "grade: " << grade1 << ", "
              << "name: " << name1 << '\n';
}

Вывод: 

ID: 0, GPA: 3.8, grade: A, name: Lisa Simpson
ID: 1, GPA: 2.9, grade: C, name: Milhouse Van Houten
Источник — «http://ru.cppreference.com/mwiki/index.php?title=cpp/utility/tuple&oldid=27333»