On Monday, 2 April 2018 at 11:41:55 UTC, Eduard Staniloiu wrote:
On Monday, 2 April 2018 at 10:26:32 UTC, RazvanN wrote:
[...]
The compiler does an implicit conversion from the type
`immutable B`
to the type `B`. It is able to do safely do so because `struct
B` has only
value types that can be copied.
The same thing happens for
immutable x = 1;
int y = x;
If you add an indirection in `struct B`, as such
struct B
{
int a;
int* p;
/* ... */
}
Then you can see that the implicit conversion fails with
"onlineapp.d(22): Error: cannot implicitly convert expression
B(0, null).this(2) of type immutable(B) to B"
I put the code at
https://run.dlang.io/gist/83756973012fcb4fec2660a39ffdad90&args=-unittest?args=-unittest
The same conversion rules that apply to built in qualified
types applies to structs. I'm guessing the same is for classes
but I haven't played that much with those so a second opinion
would be nice :)
Cheers,
Edi
FYI sth. seems to have gone wrong with the current migration to
authenticated Gists.
Sorry about the inconvenience, the hotfix is already in the
deploy queue and for this - the exported URL should have been:
https://run.dlang.io/gist/83756973012fcb4fec2660a39ffdad90?args=-unittest
