##-
# Author: Brian Tiffin
# Dedicated to the public domain
#
# Date: October 2016
# Modified: 2016-10-08/12:17-0400
##+
#
# key.icn, generate the keys of a structure
#
link wrap
record sample(x,y,z)
procedure main()
    L := [1,2,3]
    R := sample(1,2,3)
    T := table()
    insert(T, "a", 1, "b", 2, "c", 3)

    write("keys of list L, record R, table T")
    wrap()
    every f := L | R | T do { 
        every writes(wrap(key(f) || ", "))
        write(wrap()[1:-2])
    }
end