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Add a section on `regexp-replace'

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Gerard Vermeulen 2022-09-11 07:37:26 +02:00
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@ -1417,6 +1417,36 @@ previous input in the minibuffer. Listing
:CUSTOM_ID: sec:search-replace
:END:
** [[info:emacs#Regexp Replace][Regexp Replace (info)]]
:PROPERTIES:
:CUSTOM_ID: sec:regexp-replace
:END:
Executing {{{kbd(M-x replace-regexp)}}} prompts fo a regular expression =REGEXP=
and a substitution =NEWSTRING= to replace =REGEXP= with =NEWSTRING=. The tools
in section [[#sec:narrowing][Narrowing]] allow to limit the scope of {{{kbd(M-x replace-regexp)}}}.
A list pointing to relevant documentation is:
1. [[info:emacs#Regexp Replace][Regexp Replace (info)]] explains how the substitution handles references to
regular expression groups and lisp expressions.
2. [[info:emacs#Regexps][Syntax of Regular Expressions (info)]] describes regular expression features
for users.
3. [[info:elisp#Regular Expressions][Emacs Lisp Regular Expressions (info)]] describes regular expression features
for programmers.
4. [[https://www.emacswiki.org/][Emacs Wiki]] has an article on [[https://www.emacswiki.org/emacs/ReplaceRegexpWithLispExpressions][replacing regexp with lisp expressions]].
Table [[tab:replace-regexp-tranform]] tabulates how to perfom example tasks by means
of {{{kbd(M-x replace-regexp)}}} using =(regular-expression transform)= pairs.
#+attr_latex: :booktabs yes :float table
#+caption[Example =replace-regexp= (regular-expression substitution) pairs]:
#+caption: Example =replace-regexp= (regular-expression substitution) pairs.
#+name: tab:replace-regexp-tranform
| task | regular expression | substitution |
|-----------------------------+---------------------------------+---------------|
| move dot two digits forward | =0\.\([[:digit:]][[:digit:]]\)= | =0\1.= |
| move dot two digits forward | =0\.\([0-9][0-9]\)= | =0\1.= |
| renumber grep/occur matches | =\(.+:\)= | =\,(1+ \#)._= |
|-----------------------------+---------------------------------+---------------|
** [[https://github.com/Wilfred/deadgrep#readme][Deadgrep]]
:PROPERTIES:
:CUSTOM_ID: sec:deadgrep