🚀 go-pugleaf

In  <7594.273e8c18@jetson.uh.edu> (12 Nov),
Jason L. Tibbitts III (honp9@jetson.uh.edu) writes:
>
> It is required that the '|' used as logical-or be enclosed with its arguments
> in parenthesis.  In some cases, the usual AmigaDos commands will accept the OR
> symbol without parenthesis, but this is not consistent with the spec.

Sorry, but the spec does NOT say that. The '|' simply divides the current
character-group into two alternatives, whatever that group may be.
Parentheses delimit INNER groups, but the outermost group is just the
string itself. So this is perfectly OK:

        copy thisfile|thatfile|the_other to df0:

It's probably worthwhile giving the original reference for the algorithm
again (though 2.0 has now extended it considerably):

    Martin Richards, "A Compact Function for Regular Expression
    Pattern Matching"
    [Software--Practice and Experience, vol 9 (1979) 527-534]

>
> Do the pattern-matching functions in 2.0 require the parenthesis grouping?
... I hope not!

                                            -- Pete --