If some CL compiles to C and then generates code and (for argument's
    sake) can not correlate the ultimate machine instruction with the CL
    source, is that a problem with functions
    Even if it directly generated machine code, is it automatically given
    that such an implementation can correlate source and the machine code
    Don't the lexical variables go away unless explicit care is take to preserve stuff for debugging
    Isn't same true for tail call merging (or whatever)

    I guess logically you should be able to step into macro expansion and
    then also step into macro execution, showing appropriate code at the
    appropriate time, depending on whether you are debugging expansion or
    debugging execution (nice theory :)  )

Inspired by this post, and as a service to the Internet community I am
making available, free of charge, a large collection of periods:

    http://timbral.net/periods.txt