I need to respect a coding style with 4 spaces tabulations and I want to fit with the 80 columns rule. I get then the case where some function need their parameters written on several line :

int very_long_function_name (int long_param_name_1, int long_param_name_2)

I want it to be changed into

int very_long_function_name (int long_param_name_1,
    int long_param_name_2)

But when I press = to autoindent, I get

int very_long_function_name (int long_param_name_1,
        int long_param_name_2)

I set these values in my .vimrc :

set tabstop=4
set shiftwidth=4
set expandtab

What am I missing ?

  • 3
    This is controlled by the cinoptions option, you should have a look at :h 'cinoptions' and more precisely at :h cinoptions-values and :h cino-(.
    – statox
    Oct 17 '16 at 13:35
  • Thank you @statox ! I solved my problem by setting adding cinoptions=(4,W4. These options are exactly what I wanted.
    – Meinew
    Oct 17 '16 at 14:39
  • Glad I could help, I made it an answer :-)
    – statox
    Oct 17 '16 at 14:59

From :h cinoptions you read:

The 'cinoptions' affect the way 'cindent' reindents lines in a C program.
See cinoptions-values for the values of this option

From :h cinoptions-values:

The 'cinoptions' option sets how Vim performs indentation.  The value after
the option character can be one of these (N is any number):
    N   indent N spaces
    -N  indent N spaces to the left
    Ns  N times 'shiftwidth' spaces
    -Ns N times 'shiftwidth' spaces to the left

And finally :h cino-( and :h cino-W tell us that set cino=( defines the behavior that the indentation should follow when it handles text between some parentheses.

Here set cinoptions=(4,W4 tells vim:

  • When in unclosed parentheses, indent N characters from the with the unclosed parentheses.
  • When in unclosed parentheses and the unclosed parentheses is the last non-white character in its line and it is not the closing parentheses, indent the following line N characters relative to the outer context (i.e. start of the line or the next unclosed parentheses).

Which does the trick as @Meinew noted in the comments.

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