How to reduce enum definition indentation?

Question

With my actual configuration, an enum definition looks like this:

enum    Toto
    {
        foo,
        bar
    }

Spaces are by packs of 4 instead of 2 because I set 4 as default indentation space for C/C++.

I would like to align brackets with enum keyword WITHOUT reducing space between them and enum list, like this:

enum    Toto
{
    foo,
    bar
}

I already done a similar thing by totally canceling namespace indentation, with the following Elisp line:

(c-set-offset 'innamespace 0)

But I don't know if something similar is possible for enum.

Answer 1

You can adopt the same kind of solution as for your namespace definition, except you should use the brace-list-open identifier.

(c-set-offset 'brace-list-open 0)

After this setup, your code indents like this (with 2-space indentation):

enum Toto
{
  foo,
  bar
}

NB: You can find the correct indentation identifier using C-cC-s (c-show-syntactic-information) on any line of a C++ buffer. It will perform the syntactic analysis of the line and display the results. For example, when used in the { line above, it will highlight the first character of enum, and indicate in the minibuffer:

Syntactic analysis: ((brace-list-open 1))

Warning: Judging by the identifier name (brace-list-open), it might well be used for syntactic constructs other than enum. So you should expect side-effects.