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std::regex_...::transform(3) C++ Standard Libary std::regex_...::transform(3) NAME std::regex_traits::transform - std::regex_traits::transform Synopsis template< class ForwardIt > string_type transform( ForwardIt first, ForwardIt last) const; Obtains the sort key for the character sequence [first, last), such that if a sort key compares less than another sort key with operator<, then the character sequence that produced the first sort key comes before the character sequence that produced the second sort key, in the currently imbued locale's collation or- der. For example when the regex flag std::regex_constants::collate is set, then the sequence [a-b] would match some character c1 if traits.trans- form("a") <= traits.transform(c1) <= traits.transform("b"). Note that this func- tion takes a character sequence as the argument to accomodate to the ranges de- fined like [[.ae.]-d]. Standard library specializations of std::regex_traits return std::use_facet<std::collate<CharT>>(getloc()).transform(str.data(), str.data() + str.length()) for some temporary string str constructed as string_type str(first, last). Parameters first, last - a pair of LegacyForwardIterators which determines the sequence of characters to compare Type requirements - ForwardIt must meet the requirements of LegacyForwardIterator. Return value The collation key for the character sequence [first, last) in the currently imbued locale. Example This section is incomplete Reason: no example http://cppreference.com 2022.07.31 std::regex_...::transform(3)
NAME | Synopsis | Parameters | Type requirements | Return value | Example
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