This is what I have so far. Using mixin(rawstring~templatearg)
for every time I access the member is kind of cludgy though.
struct A {
string up;
string down;
string left;
string right;
}
template goPlaces(string D1, string D2, string D3) {
string goPlaces(ref A a) {
mixin("a."~D2) = "deetoo";
return "go " ~
mixin("a."~D1) ~ " then go " ~
mixin("a."~D2) ~ " then go " ~
mixin("a."~D3);
}
}
void main() {
import std.stdio;
A a = {"north","south","east","west"};
writeln(goPlaces!("up","left","down")(a));
writeln(a.left);
}
top postinglol
On Monday, 8 February 2016 at 21:09:47 UTC, cy wrote:
object.member lets me access the member of the object, but what
if I want to access those members in a generic way, but in a
different arrangement depending on context? Like if I wanted to
first follow a tree down, and second priority would be going
left to right, but then I wanted to first go right, and second
priority would be going down to up.
struct A {
string up;
string down;
string left;
string right;
}
template goPlaces(D1,D2,D3) {
string go(A a) {
return "go " ~ a.D1 ~ " then go " ~ a.D2 ~ " then go " ~ a.D3;
}
}
import std.stdio;
void main() {
A a = {"north","south","east","west"};
writeln(goPlaces!(up,down,left)(a));
}
Do I just have to use a mixin? Or implement those members as
indexes in an array, if I want to use them differently?
enum Way { UP, DOWN, LEFT, RIGHT };
struct A {
string[Way.max+1] ways;
}
...
