std::experimental::default_searcher, std::experimental::make_default_searcher
Defined in header <experimental/functional>
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||
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template
<
class ForwardIterator1, class BinaryPredicate =
std::equal_to
<>
>
class default_searcher; |
(library fundamentals TS) | |
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
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default_searcher( ForwardIterator pat_first,
ForwardIterator pat_last, |
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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()
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template
<
class ForwardIterator2 >
ForwardIterator2 operator( ) ( ForwardIterator2 first, ForwardIterator2 last ) const ; |
(until C++17) | |
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template
<
class ForwardIterator2 >
std::pair<ForwardIterator2, ForwardIterator2> |
(since C++17) | |
The member function called by std::experimental::search to perform a search with this searcher.
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Equivalent to std::search (first, last, pat_first, pat_last, pred) ; |
(until C++17) |
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Returns a pair of iterators |
(until C++17) |
Parameters
| first, last | - | a pair of iterators designating the string to be examined |
Return value
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Iterator to the first position in
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(until C++17) |
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A pair of iterators to the first and one past last positions in
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(since C++17) |
Helper Functions
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template
<
class ForwardIterator, class BinaryPredicate =
std::equal_to
<>
>
default_searcher<ForwardIterator, BinaryPredicate> make_default_searcher(
|
(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
#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) |