std::regex_...::transform(3)

std::regex_...::transform(3) is from the C++ Standard Libary, and bestie, it's giving "sort key" main character energy. 💅✨

🌸 NAME 🌸

std::regex_traits::transform - std::regex_traits::transform.

📜 Synopsis 📜

template< class ForwardIt >
string_type transform( ForwardIt first, ForwardIt last) const;

okay so this function 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 collation order of the currently imbued locale. no cap, that's the whole vibe. 🦋

For example, when the regex flag std::regex_constants::collate is set, then the sequence [a-b] would match some character c1 if traits.transform("a") <= traits.transform(c1) <= traits.transform("b"). Note that this function takes a character sequence as the argument to accommodate to the ranges defined 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

like, imagine an example here... it's not here. 😭

🗂️ Category: 🗂️

• Todo no example

xoxo, your Unix bestie 💋 — source: http://cppreference.com, date: 2024.06.10.