8
1
For instance, I want to convert "CamelCasedName" to "camel_cased_name". Is there a way to do this in emacs?
8
1
For instance, I want to convert "CamelCasedName" to "camel_cased_name". Is there a way to do this in emacs?
4
This small bit of code from this page, with a wrapper function and an underscore replacing the hyphen with an underscore, could easily be turned into a command to do that. (Check that it treats leading caps to suit you):
Sample EmacsLisp code to un-CamelCase a string (from http://www.friendsnippets.com/snippet/101/):
(defun un-camelcase-string (s &optional sep start)
"Convert CamelCase string S to lower case with word separator SEP.
Default for SEP is a hyphen \"-\".
If third argument START is non-nil, convert words after that
index in STRING."
(let ((case-fold-search nil))
(while (string-match "[A-Z]" s (or start 1))
(setq s (replace-match (concat (or sep "-")
(downcase (match-string 0 s)))
t nil s)))
(downcase s)))
4
Emacs has glasses-mode which displays camelcase names with underscores in between. (See also http://www.emacswiki.org/emacs/GlassesMode).
If you want to actually change the text of the file M-x query-replace-regexp
is probably suitable.
3
Moritz Bunkus wrote an elisp function to toggle between CamelCase and c_style
the package string-inflection
is more complete now: https://github.com/akicho8/string-inflection (note that there's also string-inflection-camelize-lower
to change hello_world
to helloWorld
).
2
I was able to do this across a whole file quickly with just a query replace regexp.
The search pattern is \([a-z]+\)\([A-Z]\)\([a-z]+\)
and the replacement is \1_\,(downcase \2)\3
.
The replacement pattern uses elisp right in the pattern. This requires Emacs 22 or later.
In emacs documentation style:
M-C-% \([a-z]+\)\([A-Z]\)\([a-z]+\) RET \1_\,(downcase \2)\3
2
For display purposes only, you can use this:
M-x glasses-mode
If you want a script which actually converts the text, I imagine you'd have to write some elisp. That question is better asked on stack overflow.
4The short answer to any question of the form "Is there any way to _____ in emacs?" is Always "YES" – Brian Postow – 2010-04-09T21:33:19.620