Is there a compiler intrinsic to get the element type of a set at compile time? So if you have “set of T” it should return T.
Regards,
Ryan Joseph
Mailing lists / fpc-pascal / 2022-05
Element type of set at compile time
6 messages · 4 people ·
- Hairy Pixels 2
- Michael Van Canneyt 2
- Martin Frb 1
- Mattias Gaertner 1
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Hairy Pixels wroteIs there a compiler intrinsic to get the element type of a set at compile time? So if you have “set of T” it should return T.
I don't think you can make such an intrinsic.
This type does not always exist, since you can define
Type
TMySet = set of (one,two,three);The element type does not exist as a separate type.
Michael.
Show quoted text 6 lines
On May 15, 2022, at 2:03 PM, Michael Van Canneyt via fpc-pascal wrote:
Type
TMySet = set of (one,two,three);
The element type does not exist as a separate type.
I mean if you had code like this T would be the anonymous enum (one,two,three). Maybe element is not the correct term here but the type which is the enum in the set.
var
I: ElementType(TMySet);
begin
for i := low(TMySet) to high(TMySet) do
;Regards,
Ryan Joseph
I don't think you can make such an intrinsic. This type does not always exist, since you…
On Sun, 15 May 2022 09:03:58 +0200 (CEST)
Michael Van Canneyt via fpc-pascal
Show quoted text 12 lines
On Sun, 15 May 2022, Hairy Pixels via fpc-pascal wrote:
> Is there a compiler intrinsic to get the element type of a set at
> compile time? So if you have “set of T” it should return T.
I don't think you can make such an intrinsic.
This type does not always exist, since you can define
Type
TMySet = set of (one,two,three);
The element type does not exist as a separate type.
The RTTI supports it, so it always exists.
Mattias
I mean if you had code like this T would be the anonymous enum (one,two,three). Maybe…
Hairy Pixels wrote 6 lines
var
I: ElementType(TMySet);
begin
for i := low(TMySet) to high(TMySet) do
;
type
TMySet = set of (one,two,three);
var
I: low(TMySet) .. high(TMySet) ;
begin
for i := low(TMySet) to high(TMySet) do
;Martin Frb wrote 14 lines
On 15/05/2022 15:07, Hairy Pixels via fpc-pascal wrote:
> var
> I: ElementType(TMySet);
> begin
> for i := low(TMySet) to high(TMySet) do
> ;
>
type
TMySet = set of (one,two,three);
var
I: low(TMySet) .. high(TMySet) ;
begin
for i := low(TMySet) to high(TMySet) do
;
type
TMySet=set of (one,two,three);
var
I:low(TMySet)..high(TMySet);
begin
for i:=low(TMySet) to high(TMySet) do
writeln(i);
end.prints indeed
one
two
three
Michael.