std::not1
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<metanoindex/>
<tbody> </tbody>| Definido no cabeçalho <functional>
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template< class Predicate > std::unary_negate<Predicate> not1(const Predicate& pred); |
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not1 é uma função auxiliar para criar um objecto de função que retorna o complemento da função de predicado unário passou. O objeto função criada é de std::unary_negate<Predicate> tipo.Original:
not1 is a helper function to create a function object that returns the complement of the unary predicate function passed. The function object created is of type std::unary_negate<Predicate>.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.
O tipo de predicado unário deve definir um tipo de membro,
argument_type, que é conversível para o tipo de predicado de parâmetro. Os objectos obtidos a partir da função unários std::ref, std::cref, std::negate, std::logical_not, std::mem_fn, std::function, std::hash, ou a partir de outra chamada para std::not1 têm este tipo definido, assim como os objectos funcionais derivados da std::unary_function preterido. Original:
The unary predicate type must define a member type,
argument_type, that is convertible to the predicate's parameter type. The unary function objects obtained from std::ref, std::cref, std::negate, std::logical_not, std::mem_fn, std::function, std::hash, or from another call to std::not1 have this type defined, as are function objects derived from the deprecated std::unary_function. The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Parâmetros
| pred | - | predicado unário
Original: unary predicate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Valor de retorno
std::not1 retorna um objeto do tipo std::unary_negate<Predicate>, construído com pred.Original:
std::not1 returns an object of type std::unary_negate<Predicate>, constructed with pred.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.
Exceções
Nenhum.
Original:
None.
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.
Exemplo
#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
struct LessThan7 : std::unary_function<int, bool>
{
bool operator()(int i) const { return i < 7; }
};
int main()
{
std::vector<int> v;
for (int i = 0; i < 10; ++i) {
v.push_back(i);
}
std::cout << std::count_if(v.begin(), v.end(), std::not1(LessThan7())) << "\n";
//same as above, but use a lambda function
std::function<int(int)> less_than_9 = [](int x){ return x < 9; };
std::cout << std::count_if(v.begin(), v.end(), std::not1(less_than_9)) << "\n";
}
Saída:
3
Veja também
objeto função wrapper retornando o complemento do predicado unário que detém Original: wrapper function object returning the complement of the unary predicate it holds The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de classe) | |
(C++11) |
envolve objeto que pode ser chamado de qualquer tipo com a assinatura especificada função chamada Original: wraps callable object of any type with specified function call signature The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de classe) |
constrói objeto std::binary_negate personalizado Original: constructs custom std::binary_negate object 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) | |
(obsoleta) |
cria um adaptador compatível com invólucro objeto de função de um ponteiro para função Original: creates an adaptor-compatible function object wrapper from a pointer to function 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) |
(obsoleta) |
adaptador compatível classe base unário função Original: adaptor-compatible unary function base class The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de classe) |