std::default_searcher

Since C++17

Header: <functional>

A class suitable for use with overload of std::search that delegates the search operation to the pre-C++17 standard library’s std::search.

# Declarations

template< class ForwardIt, class BinaryPredicate = std::equal_to<> >
class default_searcher;

(since C++17)

# Parameters

# Return value

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.

# Example

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

# See also