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| author | Kaz Kylheku <kaz@kylheku.com> | 2012-02-22 17:35:25 -0800 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2012-02-22 17:35:25 -0800 |
| commit | 1072417ca13b56e338b88fd2389b3b25861c6193 (patch) | |
| tree | 3068dd3e230b5327a4d4856715a7e1faf5d9b41c /txr.1 | |
| parent | ad3a952d7dd471995270a0c044b1d22ca4da8585 (diff) | |
| download | txr-1072417ca13b56e338b88fd2389b3b25861c6193.tar.gz txr-1072417ca13b56e338b88fd2389b3b25861c6193.tar.bz2 txr-1072417ca13b56e338b88fd2389b3b25861c6193.zip | |
* lib.c (sub_list, replace_list, lazy_sub_str, sub_str,
replace_str, sub_vec, replace_vec): Implementing floating zero
behavior. This is necessary so that the important case index .. (+
index 1) for selecting one element as a subrange works even if index is
negative.
* txr.1: Floating zero behavior for ranges documented.
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -5101,6 +5101,14 @@ Either end of the range can also be specified as nil. If the start is specified as nil, it means zero. If the end is specified as nil, it means one element past the end. Thus nil .. nil spans all of the elements. +The value zero has a "floating" behavior when used as the end of a range. +If the start of the range is a negative value, and the end of the +range is zero, the zero is interpreted as being the position past the +end of the sequence, rather than the first element. For instance the range +-1..0 means the same thing as -1..t or -1..nil. Zero at the start of a range +always means the first element, so that 0..-1 refers to all the elements except +for the last one. + .TP Notes: |