I thought I understood Rexx parsing templates, but then I found this in
the
Language Reference:
> Example 9.16. Combining variables in patterns
> /* Using a variable as a string pattern */
> /* The variable (delim) is set in the same template */
> SAY "Enter a date (mm/dd/yy format). =====> " /* assume 11/15/98 */
> pull date
> parse var date month 3 delim +1 day +2 (delim) year
> /* Sets: month="11"; delim="/"; day="15"; year="98" */
>
> If an equal, a plus, a minus sign, > or < precedes the left parenthesis, the
> value of the expression is treated as an absolute, relative positional, or
> length positional pattern. The value of the expression must be a positive
> whole number or zero.
This appears to be saying
=(value) is absolute positional,
-(value) +(value) is relative positional, and
<(value) >(value) is length positional.
I've never seen "length positional" before, and I can't find reference to it
in any of my other Rexx language sources. Since there are no examples of its
use in the Languagae Reference, how do <(value) and >(value) work?
Leslie
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