std::experimental::default_searcher,std::experimental::make_default_searcher(3)

NAME
std::experimental::default_searcher,std::experimental::make_default_searcher - std::experimental::default_searcher,std::experimental::make_default_searcher

Synopsis
   Defined in header <experimental/functional>
   template< class ForwardIterator1, class BinaryPredicate =
   std::equal_to<> > (library fundamentals TS)
   class default_searcher;
   A class suitable for use with std::experimental::search that delegates the search
   operation to the standard library's std::search.
   default_searcher is CopyConstructible and CopyAssignable.

Member functions
std::experimental::default_searcher::default_searcher
   default_searcher( ForwardIterator pat_first,
                     ForwardIterator pat_last,
                     BinaryPredicate pred = BinaryPredicate() );
   Constructs a default_searcher by storing copies of pat_first, pat_last, and pred.

Parameters
   pat_first, pat_last - a pair of iterators designating the string to be searched for
   pred - a callable object used to determine equality

Exceptions
   Any exceptions thrown by the copy constructors of BinaryPredicate or
   ForwardIterator. std::experimental::default_searcher::operator()
   template< class ForwardIterator2 >
   ForwardIterator2 operator()( ForwardIterator2 first, ForwardIterator2 (until C++17)
   last ) const;
   template< class ForwardIterator2 >
   std::pair<ForwardIterator2, ForwardIterator2> (since C++17)
       operator()( ForwardIterator2 first, ForwardIterator2 last )
   const;
   The member function called by std::experimental::search to perform a search with
   this searcher.
   Equivalent to std::search(first, last, pat_first, pat_last, pred);. (until C++17)
   Returns a pair of iterators i, j, where i is std::search(first, last,
   pat_first, pat_last, pred) and j is std::next(i, (until C++17)
   std::distance(pat_first, pat_last)) unless std::search returned last
   (no match), in which case j equals last as well.

Parameters
   first, last - a pair of iterators designating the string to be examined

Return value
   Iterator to the first position in [first, last) where a subsequence
   that compares equal to [pat_first, pat_last) as defined by pred is (until C++17)
   located, or a copy of last otherwise.
   A pair of iterators to the first and one past last positions in
   [first, last) where a subsequence that compares equal to (since C++17)
   [pat_first, pat_last) as defined by pred is located, or a pair of
   copies of last otherwise.
   Helper Functions
   template< class ForwardIterator, class BinaryPredicate =
   std::equal_to<> >
   default_searcher<ForwardIterator, BinaryPredicate> (library fundamentals
   make_default_searcher( TS)
       ForwardIterator pat_first,
       ForwardIterator pat_last,
       BinaryPredicate pred = BinaryPredicate());
   Helper function that constructs a std::experimental::default_searcher using template
   argument deduction. Equivalent to return default_searcher<ForwardIterator,
   BinaryPredicate>(pat_first, pat_last, pred);

Parameters
   pat_first, pat_last - a pair of iterators designating the string to be searched for
   pred - a callable object used to determine equality

Return value
   A default_searcher constructed with the arguments pat_first, pat_last, pred.

Example
// Run this code
 #include <experimental/algorithm>
 #include <experimental/functional>
 #include <iostream>
 #include <string>
 int main()
 {
     std::string in = "Lorem ipsum dolor sit amet, consectetur adipiscing elit,"
                      " sed do eiusmod tempor incididunt ut labore et dolore magna aliqua";
     std::string needle = "pisci";
     auto it = std::experimental::search(in.begin(), in.end(),
                   std::experimental::make_default_searcher(
                       needle.begin(), needle.end()));
     if (it != in.end())
         std::cout << "The string " << needle << " found at offset "
                   << it - in.begin() << '\n';
     else
         std::cout << "The string " << needle << " not found\n";
 }

Output:
 The string pisci found at offset 43

See also
   search searches for a range of elements
          (function template)

Category:
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