As far as I know, using a macro is the only way you can work with an
untyped(see also in the manual:
[https://nim-lang.org/docs/manual.html#templates-varargs-of-untyped](https://nim-lang.org/docs/manual.html#templates-varargs-of-untyped)
)
If you want to stringify each parameter, or want to apply another proc which
converts the all into the same type, you can simply write `varargs[typed,
yourProc]` (e.g. echo uses `varargs[typed, `$`]`
If you want to have a variadic with different types for each parameter, you can
also use a unspecified tuple:
proc takeVariadics(params: tuple) =
var i = 0
for field in fields(params):
when field is int:
echo "param ", i, " is an int"
elif field is string:
echo "param ", i, " is a string"
else:
{.error: "only strings and ints allowed!".}
inc i
echo "first call"
takeVariadics(()) # nothing
echo "second call"
takeVariadics((_: 42))
echo "last call"
takeVariadics((10, "a", "b", 12))
IMHO would it be great to adopt generic variadics similar to the ones found in
C++. But for the time being unspecified tuples and macros with untyped varargs
demonstrate how flexible and powerful Nim's generics are.
