On 6/17/21 1:46 PM, Steven Schveighoffer wrote:
> Implicit construction is supported:
>
> struct Foo
> {
> int x;
> this(int y) { x = y; }
> }
>
> Foo f = 5; // ok implicit construction
That's so unlike the rest of the language that I consider it to be a
bug. :) Really, why? What if the expression is more complicated:
int i() {
return 1;
}
Foo f = i();
OK, that works as well. Wow!
But the following doesn't and is what I think Walter has been trying to
prevent:
struct Foo
{
int x;
this(int y) { x = y; }
}
void foo(Foo) {
}
void main() {
foo(42); // COMPILATION ERROR
}
What's the difference? In both cases an int is being converted to a Foo.
I think the "working" case is against the design of D.
Likely there is a subtlety that I am missing...
Ali
