PyUnicode_DecodeUTF32Stateful

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C) @nogc nothrow
PyUnicode_DecodeUTF32Stateful
(
const(char)*
,
c_long
,
const(char)*
,
int*
,
c_long*
)

Meta