[Issue 8757] Require parenthesization of ternary operator when compounded

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8757



--- Comment #5 from bearophile_hugs at eml.cc 2013-01-19 01:28:20 PST ---
(In reply to comment #4)
> I don't care if it solves half the bugs involving ternary operators that ever
> happen.

So you are saying that data in language design should be ignored?


> You're suggesting that we force programmers to format their code in a
> particular way, and I object to that.

C language has some design mistakes, like in its precedence rules. A well
designed language, and one of the design principles of D, has to help the
programmer avoid the most common bugs. D fixes some of the mistakes of C
design. This is a "formatting forced by D", that has saved me few times:


void main() {
    int x, y;
    auto z = x & 1 == y;
}


temp.d(3): Error: 1 == y must be parenthesized when next to operator &


See also issue 5409 for something similar.


You don't want to many parentheses in expressions, but few strategically placed
ones are a small price to pay to save you code from common mistakes.

Your words don't hold water, unless you show that adding a ( ) there harms
readability or some other real coding quality.

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