deduction guides for std::basic_regex

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std::basic_regex
 
Defined in header <regex>
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

Run this code
#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
}
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