diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -1102,6 +1102,28 @@ be written instead: end @BEG_SYMBOL @(end) +If the symbol nil is used in place of a number, it means to scan +an unlimited range of lines; thus, @(skip nil) is equivalent to @(skip). + +There may be a second numeric argument. This specifies a minimum +number of lines to skip before looking for a match. For instance, +skip 15 lines and then search indefinitely for "begin ...": + + @(skip nil 15) + begin @BEG_SYMBOL + +The two arguments may be used together. For instance, the following +matches if, and only if, the 15th line of input starts with "begin ": + + @(skip 1 15) + begin @BEG_SYMBOL + +Essentially, @(skip 1 <n>) means "hard skip by <n>" lines, then +match the query without scanning. @(skip 1 0) is the same as @(skip 1), which +is a noop, because it means: "the remainder of the query must match starting on +the very next line", or, more briefly, "skip exactly zero lines", which is the +behavior if the skip directive is omitted altogether. + .SS The Trailer Directive The trailer directive introduces a trailing portion of a query or subquery |