#=======================================================================
# import() - import symbols into user's namespace
#
# What we actually do is define a function in the caller's namespace
# which returns the value. The function we create will normally
# be inlined as a constant, thereby avoiding further sub calling 
# overhead.
#=======================================================================
sub import {
    #...

    #note: $full_name is set to "Package_I_Was_Called_From::ConstantName", for each constant you provide

    #if you have a scalar, it basically does
    *$full_name = sub () { $scalar };
    #and if you have an array:
    *$full_name = sub () { @list };

    #...
}