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<html>
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<title>Sed Format String Syntax</title>
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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_regex.format.sed_format"></a><a class="link" href="sed_format.html" title="Sed Format String Syntax">Sed Format String Syntax</a>
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</h3></div></div></div>
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<p>
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Sed-style format strings treat all characters as literals except:
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</p>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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character
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</p>
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</th>
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<th>
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<p>
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description
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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&
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</p>
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</td>
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<td>
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<p>
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The ampersand character is replaced in the output stream by the
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whole of what matched the regular expression. Use \& to output
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a literal '&' character.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\
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</p>
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</td>
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<td>
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<p>
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Specifies an escape sequence.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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<p>
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An escape character followed by any character x, outputs that character unless
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x is one of the escape sequences shown below.
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</p>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Escape
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</p>
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</th>
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<th>
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<p>
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Meaning
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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\a
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</p>
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</td>
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<td>
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<p>
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Outputs the bell character: '\a'.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\e
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</p>
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</td>
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<td>
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<p>
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Outputs the ANSI escape character (code point 27).
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\f
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</p>
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</td>
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<td>
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<p>
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Outputs a form feed character: '\f'
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\n
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</p>
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</td>
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<td>
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<p>
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Outputs a newline character: '\n'.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\r
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</p>
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</td>
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<td>
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<p>
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Outputs a carriage return character: '\r'.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\t
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</p>
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</td>
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<td>
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<p>
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Outputs a tab character: '\t'.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\v
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</p>
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</td>
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<td>
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<p>
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Outputs a vertical tab character: '\v'.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\xDD
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</p>
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</td>
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<td>
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<p>
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Outputs the character whose hexadecimal code point is 0xDD
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\x{DDDD}
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</p>
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</td>
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<td>
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<p>
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Outputs the character whose hexadecimal code point is 0xDDDDD
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\cX
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</p>
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</td>
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<td>
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<p>
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Outputs the ANSI escape sequence "escape-X".
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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\D
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</p>
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</td>
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<td>
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<p>
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If D is a decimal digit in the range 1-9, then outputs the text
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that matched sub-expression D.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<div class="copyright-footer">Copyright © 1998-2013 John Maddock<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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</p>
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</div>
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<hr>
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<div class="spirit-nav">
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