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Diffstat (limited to 'docs/fs.md')
| -rw-r--r-- | docs/fs.md | 10 |
1 files changed, 9 insertions, 1 deletions
@@ -401,7 +401,15 @@ lazy `*?` included), searched the way sam searches (editors/acme/regx.c): as lines, so `^` and `$` match at the start and end of any line, `.` and a negated class never match a newline, and `$` also matches at the end of a text with no final newline. A pattern that names a newline (`\n`) runs over -the whole text instead, its `.` kept to one line. An expression is +the whole text instead, its `.` kept to one line; there a leading `^` still +matches at every line start, and `$` may stand just before a `\n` (where it +changes nothing). Any other `^` or `$` in such a pattern, `(^|\n)def` or +`a\nb$`, is refused with `in a pattern with \n, ^ can only come first and $ +only just before a \n`, since mvzr would read it as the start or end of the +whole text: never a search that silently finds nothing. Within a line, `^` +inside an alternation (`^def|^ `) matches only where the search starts, so it +works from a line's start (an `x` over lines, a `g` on one) and not from its +middle: an mvzr limit. An expression is evaluated from the current address, the range last written to `addr` (or left by the last `data` write, just past it), as acme evaluates it from `w->addr` (xfid.c:446): `.` is that address, not the selection (`dot` is |