On Wed, May 27, 2015 at 01:44:26PM -0700, Junio C Hamano wrote:

> Paul Tan <pyoka...@gmail.com> writes:
> 
> > @@ -17,6 +34,10 @@ struct am_state {
> >     struct strbuf dir;            /* state directory path */
> >     int cur;                      /* current patch number */
> >     int last;                     /* last patch number */
> > +   struct strbuf msg;            /* commit message */
> > +   struct strbuf author_name;    /* commit author's name */
> > +   struct strbuf author_email;   /* commit author's email */
> > +   struct strbuf author_date;    /* commit author's date */
> >     int prec;                     /* number of digits in patch filename */
> >  };
> 
> I always get suspicious when structure fields are overly commented,
> wondering if it is a sign of naming fields poorly.  All of the above
> fields look quite self-explanatory and I am not sure if it is worth
> having these comments, spending efforts to type SP many times to
> align them and all.

Just my 2 cents, but I think that grouping and overhead comments can
often make things more obvious. For example:

  struct am_state {
        /* state directory path */
        struct strbuf dir;

        /*
         * current and last patch numbers; are these 1-indexed
         * or 0-indexed?
         */
        int cur;
        int last;

        struct strbuf author_name;
        struct strbuf author_email;
        struct strbuf author_date;
        struct strbuf msg;

        /* number of digits in patch filename */
        int prec;
  }

Note that by grouping "cur" and "last", we can discuss them as a group,
and the overhead comment gives us room to mention their shared
properties (my indexing question is a real question, btw, whose answer I
think would be useful to mention in a comment).

Likewise, by grouping the "msg" strbuf with the author information, it
becomes much more clear that they are all about the commit metadata
(though I would not be opposed to a comment above the whole block,
either).

-Peff
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