Re: [PATCH v2 03/11] ref-filter: introduce struct used_atom

> On Wed, Dec 16, 2015 at 10:29 AM, Karthik Nayak <karthik.188@gmail.com> wrote:
>> Introduce the 'used_array' structure which would replace the existing
>> implementation of 'used_array' (which a list of atoms). This helps us
>> parse atom's before hand and store required details into the
>> 'used_array' for future usage.
>
> All my v1 review comments[1] about the commit message still apply to
> this version.
>
> [1]: http://article.gmane.org/gmane.comp.version-control.git/281860
>

>> Also introduce a parsing function for each atom in valid_atom. Using
>> this we can define special parsing functions for each of the atoms.
>
> This is a conceptually distinct change which probably deserves its own
> patch. In particular, the new patch would add this field to
> valid_atom[] *and* add the code which invokes the custom parser. (That
> code is currently commingled with introduction of the color parser in
> patch 6/11.)
>go

> More below...
>
>> Signed-off-by: Karthik Nayak <Karthik.188@gmail.com>
>> ---
>> diff --git a/ref-filter.c b/ref-filter.c
>> @@ -16,9 +16,27 @@
>> +/*
>> + * An atom is a valid field atom listed below, possibly prefixed with
>> + * a "*" to denote deref_tag().
>> + *
>> + * We parse given format string and sort specifiers, and make a list
>> + * of properties that we need to extract out of objects.  ref_array_item
>> + * structure will hold an array of values extracted that can be
>> + * indexed with the "atom number", which is an index into this
>> + * array.
>> + */
>> +static struct used_atom {
>> +       const char *str;
>> +       cmp_type type;
>> +} *used_atom;
>> +static int used_atom_cnt, need_tagged, need_symref;
>> +static int need_color_reset_at_eol;
>> +
>>  static struct {
>>         const char *name;
>>         cmp_type cmp_type;
>> +       void (*parser)(struct used_atom *atom);
>>  } valid_atom[] = {
>>         { "refname" },
>>         { "objecttype" },
>> @@ -786,7 +788,8 @@ static void populate_value(struct ref_array_item *ref)
>>
>>         /* Fill in specials first */
>>         for (i = 0; i < used_atom_cnt; i++) {
>> -               const char *name = used_atom[i];
>> +               struct used_atom *atom = &used_atom[i];
>> +               const char *name = atom->str;
>
> Same question as my previous review[1]: Why not just:
>
>     const char *name = used_atom[i].str;
>
> ?