So, following on from monarchdodra's comment [0] in the bug
tracker, how exactly should inout work? For example, should the
following work?
----------------------------------------------------
import std.algorithm : map;
class L {
auto fun(const S s) inout nothrow pure @safe {
if(point[0] is s)
return point[1];
else
return point[0];
}
this(S a, S b) {
point = [a, b];
}
S[2] point;
}
class S {
@property auto foo() inout nothrow pure @safe {
return arr.map!(e => e.fun(this));
}
L[] arr;
}
void main() { }
----------------------------------------------------
Writing foo imperatively causes no problems with inout:
----------------------------------------------------
@property auto foo() inout nothrow pure @safe {
inout(S)[] tmp;
foreach(e; arr)
tmp ~= e.fun(this);
return tmp;
}
----------------------------------------------------
Of course, the functional style looks cleaner, neater, and more
immediately obvious what is being done.
So, is this a limitation with inout, part of its design, or am I
misunderstaning something more fundamental?
[0] https://d.puremagic.com/issues/show_bug.cgi?id=12408#c4
