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    std::experimental::default_searcher, std::experimental::make_default_searcher

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    Defined in header <experimental/functional>
    template< class ForwardIterator1, class BinaryPredicate = std::equal_to<> > class default_searcher;
    		 (library fundamentals TS)
    See More

    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 last ) const;
    		 (until C++17)
    template< class ForwardIterator2 > std::pair<ForwardIterator2, ForwardIterator2> operator()( ForwardIterator2 first, ForwardIterator2 last ) const;
    		 (since C++17)

    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, std::distance(pat_first, pat_last)) unless std::search returned last (no match), in which case j equals last as well.

    		(until C++17)

    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 located, or a copy of last otherwise.

    		(until C++17)

    A pair of iterators to the first and one past last positions in [first, last) where a subsequence that compares equal to [pat_first, pat_last) as defined by pred is located, or a pair of copies of last otherwise.

    		(since C++17)

    Helper Functions

    template< class ForwardIterator, class BinaryPredicate = std::equal_to<> > default_searcher<ForwardIterator, BinaryPredicate> make_default_searcher( ForwardIterator pat_first, ForwardIterator pat_last, BinaryPredicate pred = BinaryPredicate());
    		 (library fundamentals TS)

    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

    		 searches for the first occurrence of a range of elements
    (function template) [edit]