On Friday, 7 April 2017 at 10:26:24 UTC, ANtlord wrote:
On Friday, 7 April 2017 at 07:46:40 UTC, Ali Çehreli wrote:
[...]
I can't understand. Documentation of cartesianProduct points
out about finite arrays. At least one of arrays must be a
inifinte array. As far as I know finite arrays is `int[3]` and
infinite is `int[]`
(https://dlang.org/library/std/range/primitives/is_infinite.html). Am I right?
If I am then I can't understand why DMD return error about
finite ranges compiling following code.
struct Hay {
int a;
@disable this(this);
@disable this();
this(int a){
this.a = a;
}
}
Hay[] params = [ Hay(1), Hay(23) ];
auto products = cartesianProduct(params, params);
Error text:
[...]
I noticed that removing disabling default constructors helps.
Does that mean an array contains objects of a struct with
disabled default constructor is finite?
No, int[] is a finite array. isInfinite is meant to test for
ranges which are statically defined to *never* be empty, no
matter how many times you consume them. See std.range.repeat(T)
for an example of such a range.
