On Thursday, 11 October 2018 at 14:35:34 UTC, James Japherson
wrote:
Took me about an hour to track this one down!
A + (B == 0) ? 0 : C;
D is evaluating it as
(A + (B == 0)) ? 0 : C;
The whole point of the parenthesis was to associate.
I usually explicitly associate precisely because of this!
A + ((B == 0) ? 0 : C);
In the ternary operator it should treat parenthesis directly to
the left as the argument.
Of course, I doubt this will get fixed but it should be noted
so other don't step in the same poo.
In c++ the ternary operator is the second most lowest precedence
operator, just above the comma. You can see a table of each
operator and their precendence here, I refer to it every so
often:
https://en.cppreference.com/w/cpp/language/operator_precedence
Learning that the ternary operator has such a low precedence is
one of those things that all programmers eventually run
into...welcome to the club :)
It looks like D has a similar table here
(https://wiki.dlang.org/Operator_precedence). However, it
doesn't appear to have the ternary operator in there. On that
note, D would take it's precedence order from C/C++ unless
there's a VERY good reason to change it.
