deduction guides for std::basic_regex

deduction guides for std::basic_regex - cppreference.com

From cppreference.com


`template< class ForwardIt > basic_regex( ForwardIt, ForwardIt, std::regex_constants::syntax_option_type = std::regex_constants::ECMAScript ) -> basic_regex<typename std::iterator_traits<ForwardIt>::value_type>;`		(since C++17)

This deduction guide is provided for std::basic_regex to allow deduction from an iterator range.

Example

#include <regex>
#include <vector>

int main()
{
    std::vector<char> v = {'a', 'b', 'c'};
    std::basic_regex re(v.begin(), v.end()); // uses explicit deduction guide
}