31 Regular expressions library [re]

31.8 Class template basic_­regex [re.regex]

31.8.7 basic_­regex non-member functions [re.regex.nonmemb]

31.8.7.1 basic_­regex non-member swap [re.regex.nmswap]

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template <class charT, class traits> void swap(basic_regex<charT, traits>& lhs, basic_regex<charT, traits>& rhs);
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Effects: Calls lhs.swap(rhs).