911 lines
47 KiB
HTML
911 lines
47 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]-->
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="generator" content="Asciidoctor 1.5.8">
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<meta name="author" content="Peter Dimov">
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<title>Boost.Assert</title>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700">
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<style>
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/* Asciidoctor default stylesheet | MIT License | http://asciidoctor.org */
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/* Uncomment @import statement below to use as custom stylesheet */
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/*@import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700";*/
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a{background:transparent}
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b,strong{font-weight:bold}
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dfn{font-style:italic}
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table{background:#fff;margin-bottom:1.25em;border:solid 1px #dedede}
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table thead,table tfoot{background:#f7f8f7}
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em em{font-style:normal}
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strong strong{font-weight:400}
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.keyseq{color:rgba(51,51,51,.8)}
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kbd{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;display:inline-block;color:rgba(0,0,0,.8);font-size:.65em;line-height:1.45;background-color:#f7f7f7;border:1px solid #ccc;-webkit-border-radius:3px;border-radius:3px;-webkit-box-shadow:0 1px 0 rgba(0,0,0,.2),0 0 0 .1em white inset;box-shadow:0 1px 0 rgba(0,0,0,.2),0 0 0 .1em #fff inset;margin:0 .15em;padding:.2em .5em;vertical-align:middle;position:relative;top:-.1em;white-space:nowrap}
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b.button::before,b.button::after{position:relative;top:-1px;font-weight:400}
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b.button::before{content:"[";padding:0 3px 0 2px}
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b.button::after{content:"]";padding:0 2px 0 3px}
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p a>code:hover{color:rgba(0,0,0,.9)}
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#header,#content,#footnotes,#footer{width:100%;margin-left:auto;margin-right:auto;margin-top:0;margin-bottom:0;max-width:62.5em;*zoom:1;position:relative;padding-left:.9375em;padding-right:.9375em}
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#content{margin-top:1.25em}
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#content::before{content:none}
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#header .details span.email a{color:rgba(0,0,0,.85)}
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#header .details br{display:none}
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#header .details br+span.author::before{content:"\00a0\22c5\00a0";color:rgba(0,0,0,.85)}
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body.toc2{padding-left:15em;padding-right:0}
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body.toc2.toc-right{padding-left:0;padding-right:15em}
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#toc.toc2{width:20em}
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body.toc2.toc-right{padding-left:0;padding-right:20em}}
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#content #toc{border-style:solid;border-width:1px;border-color:#e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;-webkit-border-radius:4px;border-radius:4px}
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#content #toc>:last-child{margin-bottom:0}
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#footer{max-width:100%;background-color:rgba(0,0,0,.8);padding:1.25em}
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#content{margin-bottom:.625em}
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.sect1{padding-bottom:.625em}
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@media screen and (min-width:768px){#content{margin-bottom:1.25em}
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.sect1{padding-bottom:1.25em}}
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.sect1:last-child{padding-bottom:0}
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#content h1>a.anchor,h2>a.anchor,h3>a.anchor,#toctitle>a.anchor,.sidebarblock>.content>.title>a.anchor,h4>a.anchor,h5>a.anchor,h6>a.anchor{position:absolute;z-index:1001;width:1.5ex;margin-left:-1.5ex;display:block;text-decoration:none!important;visibility:hidden;text-align:center;font-weight:400}
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#content h1>a.anchor::before,h2>a.anchor::before,h3>a.anchor::before,#toctitle>a.anchor::before,.sidebarblock>.content>.title>a.anchor::before,h4>a.anchor::before,h5>a.anchor::before,h6>a.anchor::before{content:"\00A7";font-size:.85em;display:block;padding-top:.1em}
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#content h1:hover>a.anchor,#content h1>a.anchor:hover,h2:hover>a.anchor,h2>a.anchor:hover,h3:hover>a.anchor,#toctitle:hover>a.anchor,.sidebarblock>.content>.title:hover>a.anchor,h3>a.anchor:hover,#toctitle>a.anchor:hover,.sidebarblock>.content>.title>a.anchor:hover,h4:hover>a.anchor,h4>a.anchor:hover,h5:hover>a.anchor,h5>a.anchor:hover,h6:hover>a.anchor,h6>a.anchor:hover{visibility:visible}
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#content h1>a.link:hover,h2>a.link:hover,h3>a.link:hover,#toctitle>a.link:hover,.sidebarblock>.content>.title>a.link:hover,h4>a.link:hover,h5>a.link:hover,h6>a.link:hover{color:#a53221}
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.audioblock,.imageblock,.literalblock,.listingblock,.stemblock,.videoblock{margin-bottom:1.25em}
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.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{text-rendering:optimizeLegibility;text-align:left;font-family:"Noto Serif","DejaVu Serif",serif;font-size:1rem;font-style:italic}
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table.tableblock.fit-content>caption.title{white-space:nowrap;width:0}
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table.tableblock #preamble>.sectionbody>[class="paragraph"]:first-of-type p{font-size:inherit}
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.admonitionblock>table{border-collapse:separate;border:0;background:none;width:100%}
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.admonitionblock>table td.icon{text-align:center;width:80px}
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.admonitionblock>table td.icon img{max-width:none}
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.admonitionblock>table td.icon .title{font-weight:bold;font-family:"Open Sans","DejaVu Sans",sans-serif;text-transform:uppercase}
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.admonitionblock>table td.content{padding-left:1.125em;padding-right:1.25em;border-left:1px solid #dddddf;color:rgba(0,0,0,.6)}
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.admonitionblock>table td.content>:last-child>:last-child{margin-bottom:0}
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.exampleblock>.content{border-style:solid;border-width:1px;border-color:#e6e6e6;margin-bottom:1.25em;padding:1.25em;background:#fff;-webkit-border-radius:4px;border-radius:4px}
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.exampleblock>.content>:first-child{margin-top:0}
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.exampleblock>.content>:last-child{margin-bottom:0}
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.sidebarblock{border-style:solid;border-width:1px;border-color:#e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;-webkit-border-radius:4px;border-radius:4px}
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.sidebarblock>:first-child{margin-top:0}
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.sidebarblock>:last-child{margin-bottom:0}
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.sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
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.exampleblock>.content>:last-child>:last-child,.exampleblock>.content .olist>ol>li:last-child>:last-child,.exampleblock>.content .ulist>ul>li:last-child>:last-child,.exampleblock>.content .qlist>ol>li:last-child>:last-child,.sidebarblock>.content>:last-child>:last-child,.sidebarblock>.content .olist>ol>li:last-child>:last-child,.sidebarblock>.content .ulist>ul>li:last-child>:last-child,.sidebarblock>.content .qlist>ol>li:last-child>:last-child{margin-bottom:0}
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.literalblock pre,.listingblock pre:not(.highlight),.listingblock pre[class="highlight"],.listingblock pre[class^="highlight "],.listingblock pre.CodeRay,.listingblock pre.prettyprint{background:#f7f7f8}
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.sidebarblock .literalblock pre,.sidebarblock .listingblock pre:not(.highlight),.sidebarblock .listingblock pre[class="highlight"],.sidebarblock .listingblock pre[class^="highlight "],.sidebarblock .listingblock pre.CodeRay,.sidebarblock .listingblock pre.prettyprint{background:#f2f1f1}
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.literalblock pre,.literalblock pre[class],.listingblock pre,.listingblock pre[class]{-webkit-border-radius:4px;border-radius:4px;word-wrap:break-word;overflow-x:auto;padding:1em;font-size:.8125em}
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</head>
|
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<body class="article toc2 toc-left">
|
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<div id="header">
|
|
<h1>Boost.Assert</h1>
|
|
<div class="details">
|
|
<span id="author" class="author">Peter Dimov</span><br>
|
|
</div>
|
|
<div id="toc" class="toc2">
|
|
<div id="toctitle">Table of Contents</div>
|
|
<ul class="sectlevel1">
|
|
<li><a href="#assertion_macros">Assertion Macros, <boost/assert.hpp></a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#boost_assert">BOOST_ASSERT</a></li>
|
|
<li><a href="#boost_assert_msg">BOOST_ASSERT_MSG</a></li>
|
|
<li><a href="#boost_verify">BOOST_VERIFY</a></li>
|
|
<li><a href="#boost_verify_msg">BOOST_VERIFY_MSG</a></li>
|
|
<li><a href="#boost_assert_is_void">BOOST_ASSERT_IS_VOID</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#current_function_macro">Current Function Macro, <boost/current_function.hpp></a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#boost_current_function">BOOST_CURRENT_FUNCTION</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#source_location_support">Source Location Support, <boost/assert/source_location.hpp></a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#description">Description</a></li>
|
|
<li><a href="#synopsis">Synopsis</a></li>
|
|
<li><a href="#source_location">source_location</a></li>
|
|
<li><a href="#operator">operator<<</a></li>
|
|
<li><a href="#boost_current_location">BOOST_CURRENT_LOCATION</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#changes">Revision History</a>
|
|
<ul class="sectlevel2">
|
|
<li><a href="#changes_in_1_73_0">Changes in 1.73.0</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#copyright_and_license">Appendix A: Copyright and License</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div id="content">
|
|
<div id="preamble">
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>The Boost.Assert library provides several configurable diagnostic macros
|
|
similar in behavior and purpose to the standard macro <code>assert</code> from <code><cassert></code>.</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="assertion_macros">Assertion Macros, <boost/assert.hpp></h2>
|
|
<div class="sectionbody">
|
|
<div class="sect2">
|
|
<h3 id="boost_assert">BOOST_ASSERT</h3>
|
|
<div class="paragraph">
|
|
<p>The header <code><boost/assert.hpp></code> defines the macro <code>BOOST_ASSERT</code>,
|
|
which is similar to the standard <code>assert</code> macro defined in <code><cassert></code>.
|
|
The macro is intended to be used in both Boost libraries and user
|
|
code.</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>By default, <code>BOOST_ASSERT(expr)</code> expands to <code>assert(expr)</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_DISABLE_ASSERTS</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_ASSERT(expr)</code> expands to <code>((void)0)</code>, regardless of whether
|
|
the macro <code>NDEBUG</code> is defined. This allows users to selectively disable <code>BOOST_ASSERT</code> without
|
|
affecting the definition of the standard <code>assert</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_HANDLER</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_ASSERT(expr)</code> expands to</p>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>(BOOST_LIKELY(!!(expr))? ((void)0): ::boost::assertion_failed(#expr,
|
|
BOOST_CURRENT_FUNCTION, __FILE__, __LINE__))</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>That is, it evaluates <code>expr</code> and if it’s false, calls
|
|
<code>::boost::assertion_failed(#expr, <a href="#boost_current_function">BOOST_CURRENT_FUNCTION</a>, __FILE__, __LINE__)</code>.
|
|
This is true regardless of whether <code>NDEBUG</code> is defined.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p><code>boost::assertion_failed</code> is declared in <code><boost/assert.hpp></code> as</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>namespace boost
|
|
{
|
|
void assertion_failed(char const * expr, char const * function,
|
|
char const * file, long line);
|
|
}</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>but it is never defined. The user is expected to supply an appropriate definition.</p>
|
|
</div>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_DEBUG_HANDLER</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_ASSERT(expr)</code> expands to <code>((void)0)</code> when <code>NDEBUG</code> is
|
|
defined. Otherwise the behavior is as if <code>BOOST_ENABLE_ASSERT_HANDLER</code> has been defined.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>As is the case with <code><cassert></code>, <code><boost/assert.hpp></code>
|
|
can be included multiple times in a single translation unit. <code>BOOST_ASSERT</code>
|
|
will be redefined each time as specified above.</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="boost_assert_msg">BOOST_ASSERT_MSG</h3>
|
|
<div class="paragraph">
|
|
<p>The macro <code>BOOST_ASSERT_MSG</code> is similar to <code>BOOST_ASSERT</code>, but it takes an additional argument,
|
|
a character literal, supplying an error message.</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>By default, <code>BOOST_ASSERT_MSG(expr,msg)</code> expands to <code>assert((expr)&&(msg))</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_DISABLE_ASSERTS</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_ASSERT_MSG(expr,msg)</code> expands to <code>((void)0)</code>, regardless of whether
|
|
the macro <code>NDEBUG</code> is defined.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_HANDLER</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_ASSERT_MSG(expr,msg)</code> expands to</p>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>(BOOST_LIKELY(!!(expr))? ((void)0): ::boost::assertion_failed_msg(#expr,
|
|
msg, BOOST_CURRENT_FUNCTION, __FILE__, __LINE__))</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>This is true regardless of whether <code>NDEBUG</code> is defined.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p><code>boost::assertion_failed_msg</code> is declared in <code><boost/assert.hpp></code> as</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>namespace boost
|
|
{
|
|
void assertion_failed_msg(char const * expr, char const * msg,
|
|
char const * function, char const * file, long line);
|
|
}</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>but it is never defined. The user is expected to supply an appropriate definition.</p>
|
|
</div>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_DEBUG_HANDLER</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_ASSERT_MSG(expr)</code> expands to <code>((void)0)</code> when <code>NDEBUG</code> is
|
|
defined. Otherwise the behavior is as if <code>BOOST_ENABLE_ASSERT_HANDLER</code> has been defined.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>As is the case with <code><cassert></code>, <code><boost/assert.hpp></code>
|
|
can be included multiple times in a single translation unit. <code>BOOST_ASSERT_MSG</code>
|
|
will be redefined each time as specified above.</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="boost_verify">BOOST_VERIFY</h3>
|
|
<div class="paragraph">
|
|
<p>The macro <code>BOOST_VERIFY</code> has the same behavior as <code>BOOST_ASSERT</code>, except that
|
|
the expression that is passed to <code>BOOST_VERIFY</code> is always
|
|
evaluated. This is useful when the asserted expression has desirable side
|
|
effects; it can also help suppress warnings about unused variables when the
|
|
only use of the variable is inside an assertion.</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>If the macro <code>BOOST_DISABLE_ASSERTS</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_VERIFY(expr)</code> expands to <code>((void)(expr))</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_HANDLER</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_VERIFY(expr)</code> expands to <code>BOOST_ASSERT(expr)</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>Otherwise, <code>BOOST_VERIFY(expr)</code> expands to <code>((void)(expr))</code> when <code>NDEBUG</code> is
|
|
defined, to <code>BOOST_ASSERT(expr)</code> when it’s not.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="boost_verify_msg">BOOST_VERIFY_MSG</h3>
|
|
<div class="paragraph">
|
|
<p>The macro <code>BOOST_VERIFY_MSG</code> is similar to <code>BOOST_VERIFY</code>, with an additional parameter, an error message.</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>If the macro <code>BOOST_DISABLE_ASSERTS</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_VERIFY_MSG(expr,msg)</code> expands to <code>((void)(expr))</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_HANDLER</code> is defined when <code><boost/assert.hpp></code>
|
|
is included, <code>BOOST_VERIFY_MSG(expr,msg)</code> expands to <code>BOOST_ASSERT_MSG(expr,msg)</code>.</p>
|
|
</li>
|
|
<li>
|
|
<p>Otherwise, <code>BOOST_VERIFY_MSG(expr,msg)</code> expands to <code>((void)(expr))</code> when <code>NDEBUG</code> is
|
|
defined, to <code>BOOST_ASSERT_MSG(expr,msg)</code> when it’s not.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="boost_assert_is_void">BOOST_ASSERT_IS_VOID</h3>
|
|
<div class="paragraph">
|
|
<p>The macro <code>BOOST_ASSERT_IS_VOID</code> is defined when <code>BOOST_ASSERT</code> and <code>BOOST_ASSERT_MSG</code> are expanded to <code>((void)0)</code>.
|
|
Its purpose is to avoid compiling and potentially running code that is only intended to prepare data to be used in the assertion.</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>void MyContainer::erase(iterator i)
|
|
{
|
|
// Some sanity checks, data must be ordered
|
|
#ifndef BOOST_ASSERT_IS_VOID
|
|
|
|
if(i != c.begin()) {
|
|
iterator prev = i;
|
|
--prev;
|
|
BOOST_ASSERT(*prev < *i);
|
|
}
|
|
else if(i != c.end()) {
|
|
iterator next = i;
|
|
++next;
|
|
BOOST_ASSERT(*i < *next);
|
|
}
|
|
|
|
#endif
|
|
|
|
this->erase_impl(i);
|
|
}</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>By default, <code>BOOST_ASSERT_IS_VOID</code> is defined if <code>NDEBUG</code> is defined.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_DISABLE_ASSERTS</code> is defined, <code>BOOST_ASSERT_IS_VOID</code> is always defined.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_HANDLER</code> is defined, <code>BOOST_ASSERT_IS_VOID</code> is never defined.</p>
|
|
</li>
|
|
<li>
|
|
<p>If the macro <code>BOOST_ENABLE_ASSERT_DEBUG_HANDLER</code> is defined, then <code>BOOST_ASSERT_IS_VOID</code> is defined when <code>NDEBUG</code> is defined.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="current_function_macro">Current Function Macro, <boost/current_function.hpp></h2>
|
|
<div class="sectionbody">
|
|
<div class="sect2">
|
|
<h3 id="boost_current_function">BOOST_CURRENT_FUNCTION</h3>
|
|
<div class="paragraph">
|
|
<p>The header <code><boost/current_function.hpp></code> defines a single macro, <code>BOOST_CURRENT_FUNCTION</code>,
|
|
similar to the C99 predefined identifier <code>__func__</code>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p><code>BOOST_CURRENT_FUNCTION</code> expands to a string literal containing
|
|
the (fully qualified, if possible) name of the enclosing function. If there is
|
|
no enclosing function, the behavior is unspecified.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Some compilers do not provide a way to obtain the name of the current enclosing
|
|
function. On such compilers, or when the macro <code>BOOST_DISABLE_CURRENT_FUNCTION</code>
|
|
is defined, <code>BOOST_CURRENT_FUNCTION</code> expands to <code>"(unknown)"</code>.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p><code>BOOST_DISABLE_CURRENT_FUNCTION</code> addresses a use case in which the programmer
|
|
wishes to eliminate the string literals produced by <code>BOOST_CURRENT_FUNCTION</code> from
|
|
the final executable for security reasons.</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="source_location_support">Source Location Support, <boost/assert/source_location.hpp></h2>
|
|
<div class="sectionbody">
|
|
<div class="sect2">
|
|
<h3 id="description">Description</h3>
|
|
<div class="paragraph">
|
|
<p>The header <code><boost/assert/source_location.hpp></code> defines <code>source_location</code>,
|
|
a class representing a source location and containing file, line, function
|
|
and column information. It’s similar to <code>std::source_location</code> from C++20,
|
|
but only requires C++03.</p>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>The macro <code>BOOST_CURRENT_LOCATION</code> creates a <code>source_location</code> object
|
|
containing information about the current source location.</p>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="synopsis">Synopsis</h3>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>namespace boost
|
|
{
|
|
|
|
struct source_location
|
|
{
|
|
constexpr source_location() noexcept;
|
|
constexpr source_location(char const* file, uint_least32_t line,
|
|
char const* function, uint_least32_t column = 0) noexcept;
|
|
|
|
constexpr char const* file_name() const noexcept;
|
|
constexpr char const* function_name() const noexcept;
|
|
constexpr uint_least32_t line() const noexcept;
|
|
constexpr uint_least32_t column() const noexcept;
|
|
};
|
|
|
|
template<class E, class T>
|
|
std::basic_ostream<E, T> &
|
|
operator<<( std::basic_ostream<E, T> & os, source_location const & loc );
|
|
|
|
} // namespace boost
|
|
|
|
#define BOOST_CURRENT_LOCATION \
|
|
::boost::source_location(__FILE__, __LINE__, BOOST_CURRENT_FUNCTION)</code></pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="source_location">source_location</h3>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>constexpr source_location() noexcept;</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="dlist">
|
|
<dl>
|
|
<dt class="hdlist1">Effects: </dt>
|
|
<dd>
|
|
<p>Constructs a <code>source_location</code> object for which <code>file_name()</code>
|
|
and <code>function_name()</code> return <code>"(unknown)"</code>, and <code>line()</code> and <code>column()</code>
|
|
return <code>0</code>.</p>
|
|
</dd>
|
|
</dl>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>constexpr source_location(char const* file, uint_least32_t line,
|
|
char const* function, uint_least32_t column = 0) noexcept;</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="dlist">
|
|
<dl>
|
|
<dt class="hdlist1">Effects: </dt>
|
|
<dd>
|
|
<p>Constructs a <code>source_location</code> object for which <code>file_name()</code>
|
|
returns <code>file</code>, <code>function_name()</code> returns <code>function</code>, <code>line()</code> returns the
|
|
<code>line</code> argument and <code>column()</code> returns the <code>column</code> argument.</p>
|
|
</dd>
|
|
</dl>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="operator">operator<<</h3>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>template<class E, class T>
|
|
std::basic_ostream<E, T> &
|
|
operator<<( std::basic_ostream<E, T> & os, source_location const & loc );</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="dlist">
|
|
<dl>
|
|
<dt class="hdlist1">Effects: </dt>
|
|
<dd>
|
|
<p>Outputs a string representation of <code>loc</code> to <code>os</code>.</p>
|
|
</dd>
|
|
<dt class="hdlist1">Returns: </dt>
|
|
<dd>
|
|
<p><code>os</code>.</p>
|
|
</dd>
|
|
</dl>
|
|
</div>
|
|
</div>
|
|
<div class="sect2">
|
|
<h3 id="boost_current_location">BOOST_CURRENT_LOCATION</h3>
|
|
<div class="paragraph">
|
|
<p>When <code>BOOST_DISABLE_CURRENT_LOCATION</code> is not defined, the definition of
|
|
<code>BOOST_CURRENT_LOCATION</code> is:</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>#define BOOST_CURRENT_LOCATION \
|
|
::boost::source_location(__FILE__, __LINE__, BOOST_CURRENT_FUNCTION)</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>Otherwise, <code>BOOST_CURRENT_LOCATION</code> is defined as:</p>
|
|
</div>
|
|
<div class="listingblock">
|
|
<div class="content">
|
|
<pre class="highlight"><code>#define BOOST_CURRENT_LOCATION ::boost::source_location()</code></pre>
|
|
</div>
|
|
</div>
|
|
<div class="paragraph">
|
|
<p>This allows producing executables that contain no identifying information,
|
|
for security reasons.</p>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="changes">Revision History</h2>
|
|
<div class="sectionbody">
|
|
<div class="sect2">
|
|
<h3 id="changes_in_1_73_0">Changes in 1.73.0</h3>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>Added <code>source_location</code>.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="sect1">
|
|
<h2 id="copyright_and_license">Appendix A: Copyright and License</h2>
|
|
<div class="sectionbody">
|
|
<div class="paragraph">
|
|
<p>This documentation is</p>
|
|
</div>
|
|
<div class="ulist">
|
|
<ul>
|
|
<li>
|
|
<p>Copyright 2002, 2007, 2014, 2017, 2019, 2020 Peter Dimov</p>
|
|
</li>
|
|
<li>
|
|
<p>Copyright 2011 Beman Dawes</p>
|
|
</li>
|
|
<li>
|
|
<p>Copyright 2015 Ion Gaztañaga</p>
|
|
</li>
|
|
<li>
|
|
<p>Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Last updated 2021-04-13 16:21:33 UTC
|
|
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|
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|
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