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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="math_toolkit.ccmath"></a><a class="link" href="ccmath.html" title="Constexpr CMath">Constexpr CMath</a>
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<h4>
<a name="math_toolkit.ccmath.h0"></a>
<span class="phrase"><a name="math_toolkit.ccmath.description"></a></span><a class="link" href="ccmath.html#math_toolkit.ccmath.description">Description</a>
</h4>
<p>
<code class="computeroutput"><span class="identifier">Constexpr</span></code> implementations of
the functionality found in <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">cmath</span><span class="special">&gt;</span></code>
and <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">cstdlib</span><span class="special">&gt;</span></code> <a href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0533r9.pdf" target="_top">proposed
for C++23</a>. In a <code class="computeroutput"><span class="keyword">constexpr</span></code>
context the functions will use an implementation defined in boost. If the context
is not <code class="computeroutput"><span class="keyword">constexpr</span></code> the functionality
will be directly from the STL implementation of <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">cmath</span><span class="special">&gt;</span></code>
used by the compiler. All functions that take an <code class="computeroutput"><span class="identifier">Integer</span></code>
type and return a <code class="computeroutput"><span class="keyword">double</span></code> simply
cast the <code class="computeroutput"><span class="identifier">Integer</span></code> argument to
a <code class="computeroutput"><span class="keyword">double</span></code>. All of the following
functions require C++17 or greater.
</p>
<h4>
<a name="math_toolkit.ccmath.h1"></a>
<span class="phrase"><a name="math_toolkit.ccmath.synopsis"></a></span><a class="link" href="ccmath.html#math_toolkit.ccmath.synopsis">Synopsis</a>
</h4>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">math</span><span class="special">/</span><span class="identifier">ccmath</span><span class="special">/</span><span class="identifier">ccmath</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<p>
namespace boost::math::ccmath {
</p>
<pre class="programlisting"> <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isinf</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isnan</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">sqrt</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">sqrt</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">T</span> <span class="identifier">abs</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">enable_if_t</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">is_unsigned_v</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;,</span> <span class="keyword">bool</span><span class="special">&gt;</span> <span class="special">=</span> <span class="keyword">true</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">int</span> <span class="identifier">abs</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">T</span> <span class="identifier">fabs</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isfinite</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isnormal</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">int</span> <span class="identifier">fpclassify</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">frexp</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">,</span> <span class="keyword">int</span><span class="special">*</span> <span class="identifier">exp</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">frexp</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">,</span> <span class="keyword">int</span><span class="special">*</span> <span class="identifier">exp</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">ldexp</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">exp</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">ldexp</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">exp</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">div_t</span> <span class="special">{</span><span class="identifier">Integer</span> <span class="identifier">quot</span><span class="special">;</span> <span class="identifier">Integer</span> <span class="identifier">rem</span><span class="special">;};</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">div_t</span><span class="special">&lt;</span><span class="identifier">Integer</span><span class="special">&gt;</span> <span class="identifier">div</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Integer</span> <span class="identifier">y</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">logb</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">logb</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">int</span> <span class="identifier">ilogb</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">arg</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">scalbn</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">exp</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">scalbn</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">x</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">exp</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">scalbln</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="keyword">long</span> <span class="identifier">exp</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">scalbln</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">x</span><span class="special">,</span> <span class="keyword">long</span> <span class="identifier">exp</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">floor</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">floor</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">ceil</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">ceil</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">trunc</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">trunc</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">modf</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span><span class="special">*</span> <span class="identifier">iptr</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">round</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Integer</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">double</span> <span class="identifier">round</span><span class="special">(</span><span class="identifier">Integer</span> <span class="identifier">arg</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">long</span> <span class="identifier">lround</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">arg</span><span class="special">)</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">long</span> <span class="keyword">long</span> <span class="identifier">llround</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">arg</span><span class="special">)</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">fmod</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">fmod</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="identifier">The</span> <span class="identifier">Promoted</span> <span class="keyword">return</span> <span class="identifier">type</span> <span class="identifier">will</span> <span class="identifier">have</span> <span class="identifier">at</span> <span class="identifier">least</span> <span class="keyword">double</span> <span class="identifier">prescision</span><span class="special">,</span> <span class="identifier">but</span> <span class="identifier">be</span> <span class="identifier">up</span> <span class="identifier">to</span> <span class="identifier">the</span> <span class="identifier">highest</span> <span class="identifier">precision</span> <span class="identifier">argument</span><span class="special">.</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">remainder</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">remainder</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">copysign</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">mag</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">sgn</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">copysign</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">mag</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">sgn</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">hypot</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">hypot</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">fdim</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">fdim</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">fmax</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">fmax</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">fmin</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">fmin</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span> <span class="special">=</span> <span class="identifier">Arithmetic1</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isgreater</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span> <span class="special">=</span> <span class="identifier">Arithmetic1</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isgreaterequal</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span> <span class="special">=</span> <span class="identifier">Arithmetic1</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isless</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span> <span class="special">=</span> <span class="identifier">Arithmetic1</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">islessequal</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">isunordered</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">T</span> <span class="identifier">y</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Real</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Real</span> <span class="identifier">fma</span><span class="special">(</span><span class="identifier">Real</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Real</span> <span class="identifier">z</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="identifier">Requires</span> <span class="identifier">compiling</span> <span class="identifier">with</span> <span class="identifier">fma</span> <span class="identifier">flag</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic3</span><span class="special">&gt;</span>
<span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">fma</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Arithmetic3</span> <span class="identifier">z</span><span class="special">)</span> <span class="keyword">noexcept</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Arithmetic1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Arithmetic2</span><span class="special">&gt;</span>
<span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">nextafter</span><span class="special">(</span><span class="identifier">Arithmetic1</span> <span class="identifier">from</span><span class="special">,</span> <span class="identifier">Arithmetic2</span> <span class="identifier">to</span><span class="special">)</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">constexpr</span> <span class="identifier">Promoted</span> <span class="identifier">nexttoward</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">from</span><span class="special">,</span> <span class="keyword">long</span> <span class="keyword">double</span> <span class="identifier">to</span><span class="special">)</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">constexpr</span> <span class="keyword">bool</span> <span class="identifier">signbit</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">arg</span><span class="special">)</span>
<span class="special">}</span> <span class="comment">// Namespaces</span>
</pre>
</div>
<div class="copyright-footer">Copyright © 2006-2021 Nikhar Agrawal, Anton Bikineev, Matthew Borland,
Paul A. Bristow, Marco Guazzone, Christopher Kormanyos, Hubert Holin, Bruno
Lalande, John Maddock, Evan Miller, Jeremy Murphy, Matthew Pulver, Johan Råde,
Gautam Sewani, Benjamin Sobotta, Nicholas Thompson, Thijs van den Berg, Daryle
Walker and Xiaogang Zhang<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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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