Michael Van Canneyt via fpc-pascal <[email protected]> schrieb am Fr., 23. Dez. 2022, 08:18:
> > > On Thu, 22 Dec 2022, Andrew Haines via fpc-pascal wrote: > > > Hi what I want to do is similar to this question here: > > > https://en.delphipraxis.net/topic/423-rtti-determine-record-helper-type-for-a-base-type/ > > > > I am going to create multiple type helpers for enums and I would like to > look > > up the helper and use common methods AsString AsOrdinal to get/set the > > values. I am recieving them as json that I dont have control over. I am > using > > typeinfo to fill in all the properties but I would like to convert the > > strings I am receiving to the enum values semi-automatically. > > > > LString := 'STATUS'; > > > > LHelper := GetHelper(LPropInfo^.PropType); // enum proptype > > Since there can be multiple type helpers for a type, this will never be > possible. At best you would get a list. > > But I don't think there is even a list of type helpers per type. > Sven will need to confirm. > As the active helper(s) for a type change(s) depending on the current scope (e.g. in unit A it might be a different helper than in unit B) this is not possible. Also helpers are not in any way usable on their own except to retrieve their RTTI information. Regards, Sven
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