You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: look.rs
    path of file: ./repos/regex/regex-automata/src/util
    
    the code of the file until where you have to start completion: /*!
Types and routines for working with look-around assertions.

This module principally defines two types:

* [`Look`] enumerates all of the assertions supported by this crate.
* [`LookSet`] provides a way to efficiently store a set of [`Look`] values.
* [`LookMatcher`] provides routines for checking whether a `Look` or a
`LookSet` matches at a particular position in a haystack.
*/

// LAMENTATION: Sadly, a lot of the 
    
    pub const fn reversed(self) -> Look {
        match self {
            Look::Start => Look::End,
            Look::End => Look::Start,
            Look::StartLF => Look::EndLF,
            Look::EndLF => Look::StartLF,
            Look::StartCRLF => Look::EndCRLF,
            Look::EndCRLF => Look::StartCRLF,
            Look::WordAscii => Look::WordAscii,
            Look::WordAsciiNegate => Look::WordAsciiNegate,
            Look::WordUnicode => Look::WordUnicode,
            Look::WordUnicodeNegate => Look::WordUnicodeNegate,
            Look::WordStartAscii => Look::WordEndAscii,
            Look::WordEndAscii => Look::WordStartAscii,
            Look::WordStartUnicode => Look::WordEndUnicode,
            Look::WordEndUnicode => Look::WordStartUnicode,
            Look::WordStartHalfAscii => Look::WordEndHalfAscii,
            Look::WordEndHalfAscii => Look::WordStartHalfAscii,
            Look::WordStartHalfUnicode => Look::WordEndHalfUnicode,
            Look::WordEndHalfUnicode => Look::WordStartHalfUnicode,
        }
    }