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102 lines
4.2 KiB
HTML
102 lines
4.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Pretty-Printer Example (Debugging with GDB)</title>
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<meta name="description" content="Pretty-Printer Example (Debugging with GDB)">
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<meta name="keywords" content="Pretty-Printer Example (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Pretty-Printing.html#Pretty-Printing" rel="up" title="Pretty Printing">
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<link href="Pretty_002dPrinter-Commands.html#Pretty_002dPrinter-Commands" rel="next" title="Pretty-Printer Commands">
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<link href="Pretty_002dPrinter-Introduction.html#Pretty_002dPrinter-Introduction" rel="prev" title="Pretty-Printer Introduction">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Pretty_002dPrinter-Example"></a>
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<div class="header">
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<p>
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Next: <a href="Pretty_002dPrinter-Commands.html#Pretty_002dPrinter-Commands" accesskey="n" rel="next">Pretty-Printer Commands</a>, Previous: <a href="Pretty_002dPrinter-Introduction.html#Pretty_002dPrinter-Introduction" accesskey="p" rel="prev">Pretty-Printer Introduction</a>, Up: <a href="Pretty-Printing.html#Pretty-Printing" accesskey="u" rel="up">Pretty Printing</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Pretty_002dPrinter-Example-1"></a>
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<h4 class="subsection">10.9.2 Pretty-Printer Example</h4>
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<p>Here is how a C<tt>++</tt> <code>std::string</code> looks without a pretty-printer:
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</p>
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<div class="smallexample">
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<pre class="smallexample">(gdb) print s
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$1 = {
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static npos = 4294967295,
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_M_dataplus = {
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<std::allocator<char>> = {
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<__gnu_cxx::new_allocator<char>> = {
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<No data fields>}, <No data fields>
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},
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members of std::basic_string<char, std::char_traits<char>,
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std::allocator<char> >::_Alloc_hider:
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_M_p = 0x804a014 "abcd"
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}
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}
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</pre></div>
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<p>With a pretty-printer for <code>std::string</code> only the contents are printed:
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</p>
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<div class="smallexample">
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<pre class="smallexample">(gdb) print s
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$2 = "abcd"
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</pre></div>
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</body>
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</html>
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