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      std::replace_copy, std::replace_copy_if

      De cppreference.com
      < cpp‎ | algorithm

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      C++
       
      Bibliothèque d'algorithmes
      Fonctions
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      Functions
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      Déclaré dans l'en-tête <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)
      Copie tous les éléments de la gamme [first, last) à un autre début de la plage à d_first remplacer tous les éléments répondant à des critères spécifiques new_value. La première version remplace les éléments qui sont égaux à old_value, la deuxième version remplace les éléments pour lesquels prédicat retourne ptrue. Les gammes de source et de destination ne peuvent pas se chevaucher .
      Original:
      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.
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      Sommaire

      [modifier]Paramètres

      first, last -
      l'éventail des éléments à copier
      Original:
      the range of elements to copy
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      d_first -
      le début de la plage de destination
      Original:
      the beginning of the destination range
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      old_value -
      la valeur des éléments à remplacer
      Original:
      the value of elements to replace
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      p - prédicat unéaire qui retourne ​true
      si la valeur de l'élément doit être remplacé
      Original:
      if the element value should be replaced
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      .

      L'expression p(v) doit pouvoir être convertie à bool pour tout argument v de type (possiblement const) VT, où VT est le type de valeur de InputIt, inconditionellement de value category, et ne doit pas modifier v. Ainsi, un type-paramètre VT&n'est pas permis ainsi que pour VT sauf pour VT un déplacement est équivalent à une copie (depuis C++11). ​

      new_value -
      la valeur à utiliser en remplacement
      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.

      [modifier]Retourne la valeur

      Itérateur à l'élément après le dernier élément copié .
      Original:
      Iterator to the element past the last element copied.
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      [modifier]Complexité

      Exactement last - first applications du prédicat .
      Original:
      Exactly last - first applications of the predicate.
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      [modifier]Mise en œuvre possible

      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;}

      [modifier]Exemple

      La copie suivante imprime un vecteur, en remplaçant toutes les valeurs de plus de 5 à 99 à la volée .
      Original:
      The following copy prints a vector, replacing all values over 5 with 99 on the fly.
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      #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';}

      Résultat : 

      5 99 4 2 99 99 1 99 0 3

      [modifier]Voir aussi

      supprime des éléments répondant à des critères spécifiques
      Original:
      removes elements satisfying specific criteria
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      (fonction générique)[edit]
      Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/algorithm/replace_copy&oldid=47547 »
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