delphi - Is there any way to get RTTI hints for a real48 and shortstring variable in a structure where FieldType is nil in TRttiField? -

i have discovered think odd oversight (probably intentional) on part of extended rtti feature in delphi.

i dump fields in record type has 1500 different fields in it. yes, seriously.

some of them of type real48 , shortstring, two, appears fieldtype nil these types @ runtime:

function trttifield.getvalue(instance: pointer): tvalue;  var   ft: trttitype; begin   ft := fieldtype;   if ft = nil     raise insufficientrtti; // fires!   tvalue.make(pbyte(instance) + offset, ft.handle, result); end; 

if willing assume nil-fieldtype fields in fact real48's, use offset , (if field width 6) grab real48 value.

however second complication shortstring (ie string[30]) types afflicted.

has got these 2 ancient pascal types work modern extended rtti? right i'm using best-guess approach, , fails hardcoding rules name of field, if there technique use me there without having write lot of code extract information these old pascal file-of-records modernizing, appreciate better idea.

unfortunately real48 not have type info.

you can see when try compile this:

program project1;  begin   typeinfo(real48); end. 

the same goes string[n] syntax. there fix defining own string types like:

type   string30 = string[30]; 

that alone not include rtti record field need hack/fix rtti showed here: https://stackoverflow.com/a/12687747/587106