+ ARGV_EOLN, /* end of line */
+ ARGV_ARG, /* valid argument */
+ ARGV_WORD /* normal word (or bad argument---same thing) */
+};
+
+/*
+ * A punctuation delimiter is opening, closing, or "middle mark"
+ * punctuation. These govern spacing.
+ * Opening punctuation (e.g., the opening parenthesis) suppresses the
+ * following space; closing punctuation (e.g., the closing parenthesis)
+ * suppresses the leading space; middle punctuation (e.g., the vertical
+ * bar) can do either. The middle punctuation delimiter bends the rules
+ * depending on usage.
+ */
+enum mdelim {
+ DELIM_NONE = 0,
+ DELIM_OPEN,
+ DELIM_MIDDLE,
+ DELIM_CLOSE,
+ DELIM_MAX