std::experimental::search

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Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
 
 
Defined in header <experimental/algorithm>
template<class ForwardIterator, class Searcher>

ForwardIterator search( ForwardIterator first, ForwardIterator last,

                        const Searcher& searcher );
(library fundamentals TS)

Searches the sequence [first, last) for the pattern specified in the constructor of searcher.

Effectively executes searcher(first, last).

(until C++17)

Effectively executes searcher(first, last).first.

(since C++17)

Searcher need not be CopyConstructible.

The standard library provides the following searchers:

standard C++ library search algorithm implementation
(class template)
Boyer-Moore search algorithm implementation
(class template)
Boyer-Moore-Horspool search algorithm implementation
(class template)

Parameters

Return value

Returns the result of searcher.operator(), that is, an iterator to the location at which the substring is found or a copy of last if it was not found.

Complexity

Depends on the searcher

Example

#include <iostream>
#include <string>
#include <experimental/algorithm>
#include <experimental/functional>
 
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_boyer_moore_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 a range of elements
(function template)