2014-03-24 10:38 GMT+09:00 Daniel Murphy <yebbliesnospam@gmail.com>:

"Kenji Hara" <k.hara.pg@gmail.com> wrote in message news:mailman.27.1395624482.25518.digitalmars-d@puremagic.com...

2014-03-24 10:09 GMT+09:00 bearophile <bearophileHUGS@lycos.com>:

if (cond) exp1, exp2; // in most case, this is not a bug.

It's not a bug, but this does the same thing - so why use the comma operator?

if (cond) { exp1; exp2; }

It catches bugs that are otherwise very difficult to spot.

At least I can imagine two reasonable cases.

1. If the code is ported from C/C++, breaking it is not reasonable.

2. If the two expressions are strongly related, using comma operator is reasonable to represent the intensity. I think rather it's an *ability* to represent code meaning by using code style.

Kenji Hara