Re: formatting ?: operator

[John W. Eaton]

On 04/25/2017 12:02 PM, Rik wrote:

> I really like having the '?' and ':' line up vertically to show that there
> is alternative A and alternative B.

I agree, which is why I might write

  retval = (lower
            ? octave::math::gammainc (x, a)
            : 1.0 - octave::math::gammainc (x, a));

even if the condition and the first expression will fit on a single line.

> It seems verbose to wrap both the
> entire line and the test condition in parentheses, but I'm not strongly
> opposed if you want to use that convention.

It's not necessary to wrap the condition.  My example could have been 
written this way:

   x = (some_long_condition || some_other_longer_condition
        ? some + expression - that / is * not + short
        : another + expression - that / is * also + not - short);

I'm curious to know whether you have to do the alignment by hand or if 
your editor (vim?) does it for you automatically.

jwe