The following table describes the escape characters and sequences that can be used in regular expressions:
Table B.1 | List of Character Escapes |
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(Ordinary characters)
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Characters other than . $ ^ { [ ( | ) * + ? \ match themselves.
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\a
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Matches a bell (alarm) \u0007.
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\t
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Matches a tab \u0009.
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\r
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Matches a carriage return \u000D.
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\v
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Matches a vertical tab \u000B.
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\f
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Matches a form feed \u000C.
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\n
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Matches a new line \u000A.
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\e
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Matches an escape \u001B.
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\040
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Matches an ASCII character as octal (exactly three digits). The character \040 represents a space.
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\x20
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Matches an ASCII character using hexadecimal representation (exactly two digits).
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\u0020
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Matches a Unicode character using hexadecimal representation (exactly four digits).
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\
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When followed by a character that is not recognized as an escaped character, matches that character. For example, \* is the same as \x2A.
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