Unexpected structure of macros in ngx_string.h

[Maxim Dounin]

Hello!

On Tue, Jan 12, 2021 at 12:40:06AM +0000, Chris Newton wrote:

> I just came across a problem with an innocuous looking line of code in a
> new module I have been working on:
> 
>     if (tmp_str.len == 0)
> 
>         ngx_str_set(&tmp_str, "/");
> 
> 
> The modification of tmp_str.data to '/' was always being made, but the
> length wasn't if the test failed. This turns out to be caused by the style
> used in the definition of the ngx_str_set macro.

I always wonder why people intentionally ignore nginx style and 
then complain something doesn't work for them.  Following nginx 
style and always using curly brackets is how it is expected to 
work.

-- 
Maxim Dounin
http://mdounin.ru/