ccmode: Subword Movement
4.9 Subword Movement and Editing
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In spite of the GNU Coding Standards, it is popular to name a symbol by
mixing uppercase and lowercase letters, e.g., ‘GtkWidget’,
‘EmacsFrameClass’, or ‘NSGraphicsContext’. Here we call these mixed
case symbols “nomenclatures”. Also, each capitalized (or completely
uppercase) part of a nomenclature is called a “subword”. Here are some
examples:
Nomenclature Subwords
———————————————————
‘GtkWindow’ ‘Gtk’ and ‘Window’
‘EmacsFrameClass’ ‘Emacs’, ‘Frame’, and ‘Class’
‘NSGraphicsContext’ ‘NS’, ‘Graphics’, and ‘Context’
The subword minor mode replaces the basic word oriented movement and
editing commands with variants that recognize subwords in a nomenclature
and treat them as separate words:
Key Word oriented command Subword oriented command
—————————————————————————-
‘M-f’ ‘forward-word’ ‘c-forward-subword’
‘M-b’ ‘backward-word’ ‘c-backward-subword’
‘M-@’ ‘mark-word’ ‘c-mark-subword’
‘M-d’ ‘kill-word’ ‘c-kill-subword’
‘M-DEL’ ‘backward-kill-word’ ‘c-backward-kill-subword’
‘M-t’ ‘transpose-words’ ‘c-transpose-subwords’
‘M-c’ ‘capitalize-word’ ‘c-capitalize-subword’
‘M-u’ ‘upcase-word’ ‘c-upcase-subword’
‘M-l’ ‘downcase-word’ ‘c-downcase-subword’
Note that if you have changed the key bindings for the word oriented
commands in your ‘.emacs’ or a similar place, the keys you have
configured are also used for the corresponding subword oriented
commands.
Type ‘C-c C-w’ to toggle subword mode on and off. To make the mode
turn on automatically, put the following code in your ‘.emacs’:
(add-hook 'c-mode-common-hook
(lambda () (subword-mode 1)))
As a bonus, you can also use ‘subword-mode’ in non-CC Mode buffers by
typing ‘M-x subword-mode’.
Info Catalog
ccmode: Hungry WS Deletion
ccmode: Commands
ccmode: Other Commands