HP 3000 Manuals HP 3000 Manuals
Search String Commands
Search string commands are those that appear on the left side of the
command.
The following characters are interpreted as commands if they precede a
search string, unless they are themselves preceded by a backslash
character (\).
Position Expressions
^ search string starts at beginning of line
$ search string ends at end of line
^nnn search string starts at column nnn
$nnn search string ends at (last column - nnn)
<nnn search string starts in any column before nnn
>nnn search string starts in any column after nnn
\ don't interpret the next character as a command
Tag Fields
{expn} "Remember" the text matched by the expression expn for use
in the replacement string.
a&b Match a string delimited by evenly nested occurrences of a
and b (which can be any two characters), and also
"remember" the contents for use in the replacement string.
Example.
R/(&)//[wow]/
This command replaces any set of characters delimited by parentheses with
the string [wow]. For example, if a source line contained the string
(hi(people)), the migration aid would replace it with [wow].
Character Classes
[set] Match any character in set, which is defined as
* specific list of characters (as, for example, [abde]
or [ab012&"@]), or
* range of characters, the first separated from the
last by a hyphen (as, for example, [a-z] or [0-9]),
or
* mixture of the two.
[^set] Match any characters except those in set, which is as
defined above.
Examples.
[a-gxyz] is the set abcdefgxyz
[a-zA-Z] is the complete set of alphabetic characters
[^0-9] is anything but a digit
Closures
* Match zero or more occurrences of the preceding character
or character class (but do not match anything else).
*nnn Match exactly nnn occurrences of preceding character or
class.
+nnn Match at least nnn occurrences of preceding character or
class.
?nnn Match up to nnn occurrences of preceding character or
class.
. Match any single character.
@ Match any string until the next character is found.
Examples.
The following command converts all occurrences of the string ACCEPT to
the string READ *,.
G/{@}ACCEPT//&1READ \*,/
The following command converts only the first occurrence of the string
ACCEPT to the string READ *,.
R/{@}ACCEPT//&1READ \*,/