Regexp replacement features

Question

In the replacement part of :s in evil I can add commands like \l to lowercase the next char and \L to lowercase everything that follows, but I am unable to find documentation for that anywhere. I would have expected it to be documented at https://www.gnu.org/software/emacs/manual/html_node/elisp/Syntax-of-Regexps.html but that only talks about matching, not replacing.

What I found however, is that its support seems to match this list: https://www.boost.org/doc/libs/1_44_0/libs/regex/doc/html/boost_regex/format/perl_format.html

Is there documentation on this?

Answer 1

When searching for replacement features of evil, I often start with a search related to Vim. For example, the \l and \L evil syntaxes definitely have something to do with the Vim ones (see Changing case with regular expressions) as evil tries to emulate the main features of Vim.