On Tuesday, 13 December 2016 at 23:29:31 UTC, Ali Çehreli wrote:
On 12/13/2016 01:36 PM, Ali wrote:
Now about that second part of my problem ....
I'm not entirely sure whether this should work but I think the
problem is with mutating the 'frequencies' member of an
immutable element of 'rooms'. The error message means that
those non-const expressions cannot be shared by a member of an
immutable AA.
I'm not sure I fully follow here. Because the variable in the
parse function is not immutable and the frequencies member is not
"created" yet, so to say. So after I create the frequencies
object, I assign it to the member of a Room object. The following
illustrates this more clearly I think:
struct A { int x; }
struct B { int[char] x; }
auto f1() {
int x;
x = 3;
return A(x);
}
auto f2() {
int[char] x;
x['A'] = 2;
return B(x);
}
static immutable a = f1();
static immutable b = f2();
pragma(msg, a);
pragma(msg, b);
This fails to compile with "Error: non-constant expression
['A':2]". But, the pragma(msg) prints out the correct information
for both a and b.
What's the deal with static immutable associative arrays and D
anyway? Is there some kind of roadmap somewhere or bugs that need
to be fixed before they work properly in D? I'm confused because
it seems like the data actually gets inside the struct object
that has an AA as a member, but then the compiler just decides
"nah, just kidding, this ain't actually ok. bye".
I moved the frequencies to 'data' and hte following worked.
Yeah that is indeed the workaround I mentioned and hence the need
for the pointer to room problem I was having :p This does work.
But I guess I'm just looking for a more ideal solution.
Thanks for all the help so far! :)
