On 10/12/22 7:46 AM, Dennis wrote:
On Wednesday, 12 October 2022 at 10:09:31 UTC, Steven Schveighoffer wrote:
I'm actually very surprised that just wrapping the statement in an ==
expression doesn't do the trick, what is the possible logic behind
outlawing that?
I looked into it, there are actually two different places where dmd
files the very same error:
```D
void main()
{
int x;
// Directly in loop conditions
if (x = 3) {}
while (x = 3) {}
for (; x = 3; ) {}
// when an assignment is implicitly cast to a boolean
bool b = !(x = 3);
assert(x = 3);
true && (x = 3);
}
```
Wrapping in `==` actually does do the trick, but you need to get rid of
the `!` operator. So instead of `while(!(x=3) == true)` make it `while
((x=3) == false)`
Wow thanks!
However, this is tricky, because what is happening is instead of the (x
= 3) being converted to bool (which would have the same error), `true`
is being converted to `int`. So if you had a condition like `while(x =
3)`, you would have to do `while((x = 3) != false)` and not `while((x =
3) == true)`
Or, you can just say `while((x = 3) != 0)`
But yes, this is the solution.
-Steve
