Re: [PATCH 3/3] git help: group common commands by theme

> On Fri, May 8, 2015 at 2:08 PM, Sébastien Guimmara
> <sebastien.guimmara@gmail.com> wrote:
>> On 05/06/2015 05:16 AM, Eric Sunshine wrote:
>>>
>>> On Mon, May 4, 2015 at 4:28 PM, Sébastien Guimmara
>>>>
>>>> +
>>>> +       if (group1 == group2)
>>>> +               return 0;
>>>> +       if (group1 > group2)
>>>> +               return 1;
>>>> +       else
>>>> +               return -1;
>>>
>>>
>>> Do you also want to sort the commands alphabetically within group?
>>> That is, something like this?
>>>
>>>       struct cmdname_help *e1 = elem1;
>>>       struct cmdname_help *e2 = elem2;
>>>
>>>       if (e1->group < e2->group)
>>>           return -1;
>>>       if (e1->group > e2->group)
>>>           return 1;
>>>       return strcmp(e1->name, e2->name);
>>>
>>>> +}
>>
>>
>> Your version raises:
>>
>> help.c: In function ‘cmd_group_cmp’:
>> help.c:223:28: warning: initialization discards ‘const’ qualifier from
>> pointer target type [enabled by default]
>>    struct cmdname_help *e1 = elem1;
>>                              ^
>> help.c:224:28: warning: initialization discards ‘const’ qualifier from
>> pointer target type [enabled by default]
>>    struct cmdname_help *e2 = elem2;
>>                              ^
>>
>> With the cast:
>>
>> struct cmdname_help *e1 = (struct cmdname_help*)elem1;
>>
>> It compiles without a warning (gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2)
>>
>>
>
> I'd rather change the type of struct cmdname_help to be const, such
> that it reads:
>
>        const struct cmdname_help *e1 = elem1;
>        const struct cmdname_help *e2 = elem2;
>
>        if (e1->group < e2->group)
>            return -1;
>        if (e1->group > e2->group)
>            return 1;
>        return strcmp(e1->name, e2->name);
>
> instead of casting if possible.
>