On 3/22/21 5:58 PM, ag0aep6g wrote:
On 22.03.21 21:38, Per Nordlöw wrote:
Am I the only one being annoyed by the fact that
chainPath(...).array
doesn't implicit convert to string despite the array returned from
.array is allocated by the GC.
Works for me:
----
import std.array: array;
import std.path: chainPath;
void main()
{
string chained = chainPath("foo", "bar").array;
}
----
Uniqueness is being inferred based on purity. If it doesn't work for
you, then you're probably doing something impure.
He didn't specify clearly on the original post. Yours works because
everything is a string.
Try
const(char)[] x = "foo";
string chained = chainPath(x, "bar").array;
Error: cannot implicitly convert expression array(chainPath(x, "bar"))
of type const(char)[] to string
And the answer is complex. You can't accept a const range, because they
don't work. The only way to have purity infer uniqueness is to accept
paramters that the result could not have come from. Usually this means
accepting const and returning mutable.
-Steve
