[Python-Dev] Update PEP 7 to require curly braces in C

[Andrew Barnert]

> On Jan 19, 2016, at 08:56, Jim J. Jewett <jimjjewett at gmail.com> wrote:
> 
> On Mon Jan 18 03:39:42 EST 2016, Andrew Barnert pointed out:
>> 
>> Alternatively, it could say something like "braces must not be omitted;
>> when other C styles would use a braceless one-liner, a one-liner with
>> braces should be used instead; otherwise, they should be formatted as follows"
> 
> That "otherwise" gets a bit awkward, but I like the idea.  Perhaps
> "braces must not be omitted, and should normally be formatted as
> follows. ... Where other C styles would permit a braceless one-liner,
> the expression and braces may be moved to a single line, as follows: "
> 
>    if (x > 5) { y++ }
> 
> I think that is clearly better, but it may be *too* lightweight for
> flow control.
> 
>    if (!obj)
>        { return -1; }
> 
> does work for me, and I think the \n{} may actually be useful for
> warning that flow control takes a jump.

Your wording is much better than mine. And so is your suggestion. Giving people the option of 1 or 3 lines, but not 2, seems a little silly. And, while I rarely use or see your 2-line version in C, I use it quite a bit in C++ (and related languages like D), so it doesn't look at all weird to me. But I'll leave it up to people who only do C (and Python) and/or who are more familiar with the CPython code base to judge.