Importing typetraits solved the problem. I would have a related question.
Since I want to store the type name on the first call for that type, and since
I cannot store the string itself because it will be stored on the shared heap,
I assume I have to use the cstring. The manual says:
"Even though the conversion is implicit, it is not safe: The garbage collector
does not consider a cstring to be a root."
So I cannot keep/store the cstring directly either. Will this do the job
correctly?
proc copyCString(s: cstring, len: int): cstring =
result = cast[cstring](allocShared(len+1))
copyMem(cast[pointer](result), cast[pointer](s), len+1)
let s = "abc"
echo copyCString(s.cstring, len(s))
