std::tuple
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| Definido no cabeçalho <tuple>
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| template< class... Types > class tuple; |
(desde C++11) | |
std::tuple modelo de classe é uma coleção de tamanho fixo de valores heterogêneos. É uma generalização de std::pair.Original:
Class template
std::tuple is a fixed-size collection of heterogeneous values. It is a generalization of std::pair.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Índice |
[editar] Funções de membro
| constrói um novo tuple Original: constructs a new tuple The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
| atribui o conteúdo de um tuple para outroOriginal: assigns the contents of one tuple to anotherThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
| Trocar o conteúdo de dois tuples Original: swaps the contents of two tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
[editar] Não-membros funções
| cria um objeto tuple do tipo definido pelo tipo de argumentoOriginal: creates a tuple object of the type defined by the argument typesThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
| cria um tuple de referências lvalue ou desempacota a tupla em objetos individuaisOriginal: creates a tuple of lvalue references or unpacks a tuple into individual objectsThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
| cria um tuple de referências rvalueOriginal: creates a tuple of rvalue referencesThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
| cria um tuple pela concatenação de qualquer número de tuplasOriginal: creates a tuple by concatenating any number of tuplesThe text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
| tupla acessa elemento especificado Original: tuple accesses specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
| lexicographically compara os valores na tupla Original: lexicographically compares the values in the tuple The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
| (C++11) |
o algoritmo especializado std::swap Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) |
[editar] Classes auxiliares
| obtém o tamanho de tuple em tempo de compilação Original: obtains the size of tuple at compile time The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (especialização modelo. classe) | |
| obtém o tipo do elemento especificado Original: obtains the type of the specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (especialização modelo. classe) | |
| especializa o traço tipo std::uses_allocator Original: specializes the std::uses_allocator type trait The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (especialização modelo. classe) | |
| espaço reservado para pular um elemento quando descompactar um tuple usando tie Original: placeholder to skip an element when unpacking a tuple using tie The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (constante) | |
[editar] Exemplo
#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'; }
Saída:
ID: 0, GPA: 3.8, grade: A, name: Lisa Simpson ID: 1, GPA: 2.9, grade: C, name: Milhouse Van Houten
