I actually found the solution by myself:
# Note: extremely unsafe code, assumes that this is running on a 64-bit
machine
# 16 byte should be used for closures
var procedures: seq[array[8, byte]] = @[]
procedures.add(cast[array[8, byte]](greet))
procedures.add(cast[array[8, byte]](someotherproc))
# It does compile and work without the nimcall pragma, but I let it there,
safety first
cast[proc(msg: string) {.nimcall.}](procedures[0])("Hallo Welt")
cast[proc(){.nimcall.}](procedures[1])()
Also procedures has to be a var instead of let, ah I'm so depending on auto
linting.
Atleast I learned something while breaking Nim. Breaking the rules is something
which is only rarely taught(for good reasons). But I'm glad that it's possible
in Nim.
