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std::search

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< cpp‎ | algorithm

 
 
Biblioteca algoritmo
Funções
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Functions
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Não modificar operações de seqüência
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Non-modifying sequence operations
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Modificando operações de seqüência
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Modifying sequence operations
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Particionamento operações
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Partitioning operations
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Operações de classificação (em intervalos ordenados)
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Sorting operations (on sorted ranges)
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Binários operações de busca (em intervalos ordenados)
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Binary search operations (on sorted ranges)
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Definir operações (em intervalos ordenados)
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Set operations (on sorted ranges)
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Operações de pilha
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Heap operations
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Mínimo / máximo de operações
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Minimum/maximum operations
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Operações numéricas
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Numeric operations
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C biblioteca
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C library
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Defined in header <algorithm>
template< class ForwardIt1, class ForwardIt2 >

ForwardIt1 search( ForwardIt1 first, ForwardIt1 last,

                   ForwardIt2 s_first, ForwardIt2 s_last );
(1)
template< class ForwardIt1, class ForwardIt2, class BinaryPredicate >

ForwardIt1 search( ForwardIt1 first, ForwardIt1 last,

                   ForwardIt2 s_first, ForwardIt2 s_last, BinaryPredicate p );
(2)
Procura a subseqüência primeiro [s_first, s_last) elementos no [first, last - (s_last - s_first)) intervalo. A primeira versão utiliza operator== para comparar os elementos, a segunda versão usa o predicado binário dado p.
Original:
Searches for the first subsequence of elements [s_first, s_last) in the range [first, last - (s_last - s_first)). The first version uses operator== to compare the elements, the second version uses the given binary predicate p.
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Índice

[editar] Parâmetros

first, last -
a gama de elementos para examinar
Original:
the range of elements to examine
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s_first, s_last -
a gama de elementos para pesquisar
Original:
the range of elements to search for
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p - binary predicate which returns ​true if the elements should be treated as equal.

The signature of the predicate function should be equivalent to the following:

 bool pred(const Type1 &a, const Type2 &b);

The signature does not need to have const &, but the function must not modify the objects passed to it.
The types  Type1 and  Type2 must be such that objects of types ForwardIt1 and ForwardIt2 can be dereferenced and then implicitly converted to  Type1 and  Type2 respectively.

Type requirements
-
ForwardIt1, ForwardIt2 must meet the requirements of ForwardIterator.

[editar] Valor de retorno

Iterator para o início da primeira subsequência [s_first, s_last) no [first, last - (s_last - s_first)) gama. Se nenhuma subseqüência tal for encontrado, last é returned.
Original:
Iterator to the beginning of first subsequence [s_first, s_last) in the range [first, last - (s_last - s_first)). If no such subsequence is found, last is returned.
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Se [s_first, s_last) está vazio, first é devolvido. (a partir do C++ 11)
Original:
If [s_first, s_last) is empty, first is returned. (a partir do C++ 11)
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[editar] Complexidade

Na maioria das comparações dos S*N onde S = std::distance(s_first, s_last) e N = std::distance(first, last).
Original:
At most S*N comparisons where S = std::distance(s_first, s_last) and N = std::distance(first, last).
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[editar] Possível implementação

First version
template<class ForwardIt1, class ForwardIt2>
ForwardIt1 search(ForwardIt1 first, ForwardIt1 last,
                        ForwardIt2 s_first, ForwardIt2 s_last)
{
    for (; ; ++first) {
        ForwardIt1 it = first;
        for (ForwardIt2 s_it = s_first; ; ++it, ++s_it) {
            if (s_it == s_last) {
                return first;
            }
            if (it == last) {
                return last;
            }
            if (!(*it == *s_it)) {
                break;
            }
        }
    }
}
Second version
template<class ForwardIt1, class ForwardIt2, class BinaryPredicate>
ForwardIt1 search(ForwardIt1 first, ForwardIt1 last,
                        ForwardIt2 s_first, ForwardIt2 s_last, 
                        BinaryPredicate p)
{
    for (; ; ++first) {
        ForwardIt1 it = first;
        for (ForwardIt2 s_it = s_first; ; ++it, ++s_it) {
            if (s_it == s_last) {
                return first;
            }
            if (it == last) {
                return last;
            }
            if (!p(*it, *s_it)) {
                break;
            }
        }
    }
}

[editar] Exemplo

[editar] Veja também

encontra a última sequência de elementos em um determinado intervalo
Original:
finds the last sequence of elements in a certain range
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(modelo de função) [edit]
determina se dois conjuntos de elementos são os mesmos
Original:
determines if two sets of elements are the same
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(modelo de função) [edit]
encontra o primeiro elemento satisfazer critérios específicos
Original:
finds the first element satisfying specific criteria
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(modelo de função) [edit]
retorna true se um intervalo é lexicograficamente menor do que outro
Original:
returns true if one range is lexicographically less than another
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(modelo de função) [edit]
encontra a primeira posição em que dois intervalos diferentes
Original:
finds the first position where two ranges differ
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(modelo de função) [edit]
Procura por um número de cópias consecutivos de um elemento em uma faixa
Original:
searches for a number consecutive copies of an element in a range
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(modelo de função) [edit]