Re: [Qemu-devel] [PATCH v6 1/2] CODING_STYLE: specify the indent rule for multiline code

[Igor Mammedov <imammedo@redhat.com>]

On Mon,  4 Mar 2019 15:16:30 +0800
Wei Yang <richardw.yang@linux.intel.com> wrote:

> We didn't specify the indent rule for multiline code here, which may
> mislead users. And in current code, the code use various styles.
> 
> Add this rule in CODING_STYLE to make sure this is clear to every one.
> 
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
> Suggested-by: Igor Mammedov <imammedo@redhat.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> 
> ---
> v6:
>    * add ) for last example of function
> v5:
>    * different rules -> various styles
>    * describe function variants separately
>    * take struct out
> v4:
>    * widths -> width
>    * add an exception example for function
> v3:
>    * misleading -> mislead
>    * add comma after arg2 in example
> v2:
>    * rephrase changelog suggested by Eric Blake
>      - remove one redundant line
>      - fix some awkward grammar
>      - add { ; at the end of example
> ---
>  CODING_STYLE | 39 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/CODING_STYLE b/CODING_STYLE
> index ec075dedc4..90321e9c28 100644
> --- a/CODING_STYLE
> +++ b/CODING_STYLE
> @@ -29,6 +29,45 @@ Spaces of course are superior to tabs because:
>  
>  Do not leave whitespace dangling off the ends of lines.
>  
> +1.1 Multiline Indent
> +
> +There are several places where indent is necessary:
> +
> + - if/else
> + - while/for
> + - function definition & call
> +
> +When breaking up a long line to fit within line width, we need a proper indent
> +for the following lines.
> +
> +In case of if/else, while/for, align the secondary lines just after the
> +opening parenthesis of the first.
> +
> +For example:
> +
> +    if (a == 1 &&
> +        b == 2) {
> +
> +    while (a == 1 &&
> +           b == 2) {
> +
> +In case of function, there are several variants:
> +
> +    * 4 spaces indent from the beginning
> +    * align the secondary lines just after the opening parenthesis of the
> +      first
> +
> +For example:
> +
> +    do_something(x, y,
> +        z);
> +
> +    do_something(x, y,
> +                 z);
> +
> +    do_something(x, do_another(y,
> +                               z));
> +
>  2. Line width
>  
>  Lines should be 80 characters; try not to make them longer.