On Monday, 24 March 2014 at 02:21:20 UTC, Kenji Hara wrote:
2014-03-24 10:38 GMT+09:00 Daniel Murphy
<[email protected]>:
"Kenji Hara" <[email protected]> wrote in message
news:[email protected]...
2014-03-24 10:09 GMT+09:00 bearophile
<[email protected]>:
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.
Kenji Hara
What about the compiler make some effort to detect this usage and
suggests the appropriated solution? just like it does when using
C's array/cast style. i.e., split the expression separed by the
comma operator in a list of expressions separed by semicolon
inside a compund statement. It isn't too hard to implement.
