H3C S5120-SI Series Configuration Manual page 33

Character
Matches a single character
[ ]
contained within the brackets.
A character group. It is usually used
( )
with "+" or "*".
Repeats the character string
specified by the index. A character
string refers to the string within ()
before \. index refers to the
sequence number (starting from 1
\index from left to right) of the character
group before \. If only one character
group appears before \, index can
only be 1; if n character groups
appear before index, index can be
any integer from 1 to n.
Matches a single character not
[^]
contained within the brackets.
Matches a character string starting
\<string
with string.
Matches a character string ending
string\>
with string.
Matches character1character2.
character1 can be any character
\bcharacter2
except number, letter or underline,
and \b equals [^A-Za-z0-9_].
Matches a string containing
\Bcharacter
character, and no space is allowed
before character.
Matches character1character2.
character2 must be a number, letter,
character1\w
or underline, and \w equals
[^A-Za-z0-9_].
\W Equals \b.
Escape character. If a special
character listed in this table follows \,
\
the specific meaning of the character
is removed.
Meaning
1-19
Remarks
For example, [16A] matches a string containing any
character among 1, 6, and A; [1-36A] matches a
string containing any character among 1, 2, 3, 6, and
A (- is a hyphen).
"]" can be matched as a common character only
when it is put at the beginning of characters within
the brackets, for example [ ]string]. There is no such
limit on "[".
For example, (123A) means a character group
"123A"; "408(12)+" matches 40812 or 408121212.
But it does not match 408.
For example, (string)\1 repeats string, and thus a
matching string must contain stringstring.
(string1)(string2)\2 repeats string2, and thus a
matching string must contain string1string2string2.
(string1)(string2)\1\2 repeats string1 and string2
respectively, and thus a matching string must
contain string1string2string1string2.
For example, [^16A] means to match a string
containing any character except 1, 6 or A, and the
matching string can also contain 1, 6 or A, but cannot
contain these three characters only. For example,
[^16A] matches "abc" and "m16", but not 1, 16, or
16A.
For example, "\<do" matches word "domain" and
string "doa".
For example, "do\>" matches word "undo" and string
"abcdo".
For example, "\ba" matches "-a" with "-" being
character1, and "a" being character2, but it does not
match "2a" or "ba".
For example, "\Bt" matches "t" in "install", but not "t"
in "big top".
For example, "v\w" matches "vlan", with "v" being
character1, and "l" being character2. v\w also
matches "service", with "i" being character2.
For example, "\Wa" matches "-a", with "-" being
character1, and "a" being character2, but does not
match "2a" or "ba".
For example, "\\" matches a string containing "\", "\^"
matches a string containing "^", and "\\b" matches a
string containing "\b".