Espaços nominais
Variantes
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std::replace_copy, std::replace_copy_if

Da cppreference.com
< 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 InputIt, class OutputIt, class T >

OutputIt replace_copy( InputIt first, InputIt last, OutputIt d_first,

                       const T& old_value, const T& new_value );
(1)
template< class InputIt, class OutputIt, class UnaryPredicate, class T >

OutputIt replace_copy_if( InputIt first, InputIt last, OutputIt d_first,

                          UnaryPredicate p, const T& new_value );
(2)

Copies the all elements from the range [first, last) to another range beginning at d_first replacing all elements satisfying specific criteria with new_value. The first version replaces the elements that are equal to old_value, the second version replaces elements for which predicate p returns true. The source and destination ranges cannot overlap.

Índice

[editar] Parâmetros

first, last -
a gama de elementos para copiar
Original:
the range of elements to copy
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d_first -
o início do intervalo de destino
Original:
the beginning of the destination range
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old_value -
o valor de elementos a substituir
Original:
the value of elements to replace
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p - unary predicate which returns ​true
se o valor do elemento deve ser substituído
Original:
if the element value should be replaced
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.

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

 bool pred(const Type &a);

The signature does not need to have const &, but the function must not modify the objects passed to it.
The type Type must be such that an object of type InputIt can be dereferenced and then implicitly converted to Type. ​

new_value -
o valor a ser usado como substituto
Original:
the value to use as replacement
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Type requirements
-
InputIt must meet the requirements of InputIterator.
-
OutputIt must meet the requirements of OutputIterator.

[editar] Valor de retorno

Iterador para o elemento passado o último elemento copiado.
Original:
Iterator to the element past the last element copied.
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[editar] Complexidade

Exatamente last - first aplicações do predicado.
Original:
Exactly last - first applications of the predicate.
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[editar] Possível implementação

First version
template<class InputIt, class OutputIt, class T>
OutputIt replace_copy(InputIt first, InputIt last, OutputIt d_first,
                      const T& old_value, const T& new_value)
{
    for (; first != last; ++first) {
        *d_first++ = (*first == old_value) ? new_value : *first;
    }
    return d_first;
}
Second version
template<class InputIt, class OutputIt, 
         class UnaryPredicate, class T>
OutputIt replace_copy_if(InputIt first, InputIt last, OutputIt d_first,
                         UnaryPredicate p, const T& new_value)
{
    for (; first != last; ++first) {
        *d_first++ = (p( *first ) ? new_value : *first;
    }
    return d_first;
}

[editar] Exemplo

The following copy prints a vector, replacing all values over 5 with 99 on the fly.

#include <algorithm>
#include <vector>
#include <iostream>
#include <iterator>
#include <functional>
 
int main()
{
    std::vector<int> v{5, 7, 4, 2, 8, 6, 1, 9, 0, 3};
    std::replace_copy_if(v.begin(), v.end(),
                         std::ostream_iterator<int>(std::cout, " "),
                         [](int n){return n > 5;}, 99);
    std::cout << '\n';
}

Output:

5 99 4 2 99 99 1 99 0 3

[editar] Veja também

remove elementos que satisfazem critérios específicos
Original:
removes elements satisfying specific criteria
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(modelo de função) [edit]