Re: Getting FieldNameTuple including all base-classes.
On 5/20/20 12:03 PM, realhet wrote:
On Wednesday, 20 May 2020 at 01:18:24 UTC, Paul Backus wrote:
On Tuesday, 19 May 2020 at 23:15:45 UTC, realhet wrote:
I think what you want is `std.meta.staticMap`. Something like this:
alias FieldNameTuple2(T) = staticMap!(FieldNameTuple,
BaseClassesTuple!T);
class A { int a, a1; }
class B : A { int b; }
class C : B { int c, c1; }
alias AllClasses(T) = Reverse!(AliasSeq!(T, BaseClassesTuple!T[0..$-1]));
alias AllFieldNames(T) = staticMap!(FieldNameTuple, AllClasses!T);
void main(){
static foreach(T; "ABC") mixin("AllFieldNames!"~T~".stringof.writeln;");
}
That statticMap unlike the normal map, it also joins the AliasSeq at the
end. Just what I needed.
Thank You!
Just in case - you can avoid mixin using:
```D
static foreach(T; AliasSeq!(A, B, C))
AllFieldNames!T.stringof.writeln;
```
https://run.dlang.io/is/Q6omgL
Re: Getting FieldNameTuple including all base-classes.
On Wednesday, 20 May 2020 at 09:03:51 UTC, realhet wrote:
On Wednesday, 20 May 2020 at 01:18:24 UTC, Paul Backus wrote:
On Tuesday, 19 May 2020 at 23:15:45 UTC, realhet wrote:
With this mod it also works with structs:
template AllClasses(T){
static if(is(T == class))
alias AllClasses = Reverse!(AliasSeq!(T,
BaseClassesTuple!T[0..$-1]));
else
alias AllClasses = T;
}
Re: Getting FieldNameTuple including all base-classes.
On Wednesday, 20 May 2020 at 01:18:24 UTC, Paul Backus wrote:
On Tuesday, 19 May 2020 at 23:15:45 UTC, realhet wrote:
I think what you want is `std.meta.staticMap`. Something like
this:
alias FieldNameTuple2(T) = staticMap!(FieldNameTuple,
BaseClassesTuple!T);
class A { int a, a1; }
class B : A { int b; }
class C : B { int c, c1; }
alias AllClasses(T) = Reverse!(AliasSeq!(T,
BaseClassesTuple!T[0..$-1]));
alias AllFieldNames(T) = staticMap!(FieldNameTuple, AllClasses!T);
void main(){
static foreach(T; "ABC")
mixin("AllFieldNames!"~T~".stringof.writeln;");
}
That statticMap unlike the normal map, it also joins the AliasSeq
at the end. Just what I needed.
Thank You!
Re: Getting FieldNameTuple including all base-classes.
On Tuesday, 19 May 2020 at 23:15:45 UTC, realhet wrote:
Hi,
I was able to reach all the fields in a subclass using foreach
and BaseClassesTuple, but is there a way to do this using
functional programming primitives, but in compile time for
tuples?
private template FieldNameTuple2(T) {
enum FieldNameTuple2 = BaseClassesTuple!T.map!(S =>
FieldNameTuple!S).join;
}
This is obviously wrong, but is there a way to do it?
I've searched for FieldNameTuple and BaseClassesTuple, but
without luck. It's weird because it seems like a common thing
to do.
Thanks in advance!
I think what you want is `std.meta.staticMap`. Something like
this:
alias FieldNameTuple2(T) = staticMap!(FieldNameTuple,
BaseClassesTuple!T);
