Object selections have become one of my favorite Vim features. (See :help
object-select for some context for this request.) It took me awhile to
discover them, but now that I have I use them constantly.
I'd like to see a new one (or actually two considering the a and i forms) to
select comma separated items in a list.
In the simplest use case, comma object selection would include text starting at
the previous comma or '(' to the next comma or ')'.
a, - Select the current parameter in a C-style parameter list. Any previous
whitespace will be included, as well as any trailing ','. Whitespace after the
trailing ',' will not be included. If the parameter is the last in the
parameter list, the ending delimiter will not be selected.
i, - Same as a, except that leading whitespace and a trailing ',' (if
present) will not be part of the selection.
Other bracketing delimeters should work in addition to '(' and ')', including
'[' and ']', '{' and '}' and possibly '<' and '>'.
Examples:
Consider this line of programming code:
func( a, b(c, d[0]), "this, is a test")
In normal mode with the cursor on the first parameter, "da," would change this
to:
func( b(c, d[0]), "this, is a test")
Or, if the cursor is on 'b' in the second parameter, "da," would yield:
func( a, "this, is a test")
(Note the ignored ')' and ']' characters.)
Or if the cursor was in the string of the third parameter, "da," would yield:
func( a, b(c, d[0]), )
(Note that the ',' in the string was not a delimiter because it was nested
between quotes.)
Some filetypes have other needs. For example in a CDF file, <C-R> is a
bracketing character. To accommodate this I suggest some accompanying options:
listsep - Characters used to separate items in a list. Default: ',;'
liststart - Characters used to start a list (if not nested in quotes or
balanced bracketed strings). Default: '({[<'.
listend - Characters used to end a list (if not nested in quotes or balanced
bracketed strings). Default: ')}]>'.
-Codie
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