[Ukxang]

There is 'fixnum_arg( List_Ref(l,j),1) , " "); in DEFINE_ON_DEMAND
also, I saw the 'flonum_arg' such as 'fixnum_arg'

I did find everywhere, but, I didn't solve that.

Please, help me TT

[fox000002]

FLUENT_EXPORT double
  flonum_arg    (Pointer x, char *msg);

#if WIN64
 FLUENT_EXPORT LONG64        
#else
 FLUENT_EXPORT long
#endif
  fixnum_arg    (Pointer x, char *msg);

flonum_arg return the double value of Pointer x as fixnum_arg return the integer value.

'msg' seems to be some error message.

I cannot find 'List_Ref'. It should be compatible with list-ref in Scheme.

[Ukxang]

At first, Thank you for your favor.
Frankly speaking, I don't understand that.

Are "fixnum" & "flonum" merly functions in UDF?

If not, Do they need define function?

and, I don't understand function's role.

[fox000002]

The two functions are used to extract data of the Scheme object pointer x.

They are internal functions and rarely used in UDF code.