mirror of
https://github.com/boostorg/mp11.git
synced 2025-12-04 23:59:21 +01:00
Revert mp_or; add mp_void; update documentation
This commit is contained in:
Peter Dimov
@@ -166,6 +166,7 @@
|
||||
</dl></dd>
|
||||
<dt><span class="section"><a href="mp11.html#mp11.reference.function">Helper Metafunctions, <code class="computeroutput"><span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">mp11</span><span class="special">/</span><span class="identifier">function</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code></a></span></dt>
|
||||
<dd><dl>
|
||||
<dt><span class="section"><a href="mp11.html#mp11.reference.function.mp_void_t"><code class="computeroutput"><span class="identifier">mp_void</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code></a></span></dt>
|
||||
<dt><span class="section"><a href="mp11.html#mp11.reference.function.mp_and_t"><code class="computeroutput"><span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code></a></span></dt>
|
||||
<dt><span class="section"><a href="mp11.html#mp11.reference.function.mp_all_t"><code class="computeroutput"><span class="identifier">mp_all</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code></a></span></dt>
|
||||
<dt><span class="section"><a href="mp11.html#mp11.reference.function.mp_or_t"><code class="computeroutput"><span class="identifier">mp_or</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code></a></span></dt>
|
||||
@@ -2158,6 +2159,16 @@
|
||||
</h3></div></div></div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="mp11.reference.function.mp_void_t"></a><a class="link" href="mp11.html#mp11.reference.function.mp_void_t" title="mp_void<T...>"><code class="computeroutput"><span class="identifier">mp_void</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code></a>
|
||||
</h4></div></div></div>
|
||||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span><span class="special">...</span> <span class="identifier">T</span><span class="special">></span> <span class="keyword">using</span> <span class="identifier">mp_void</span> <span class="special">=</span> <span class="keyword">void</span><span class="special">;</span>
|
||||
</pre>
|
||||
<p>
|
||||
Same as <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">void_t</span></code> from C++17.
|
||||
</p>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="mp11.reference.function.mp_and_t"></a><a class="link" href="mp11.html#mp11.reference.function.mp_and_t" title="mp_and<T...>"><code class="computeroutput"><span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code></a>
|
||||
</h4></div></div></div>
|
||||
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span><span class="special">...</span> <span class="identifier">T</span><span class="special">></span> <span class="keyword">using</span> <span class="identifier">mp_and</span> <span class="special">=</span> <span class="comment">/*...*/</span><span class="special">;</span>
|
||||
@@ -2168,12 +2179,17 @@
|
||||
if there exists a type <code class="computeroutput"><span class="identifier">U</span></code>
|
||||
in <code class="computeroutput"><span class="identifier">T</span><span class="special">...</span></code>
|
||||
for which <code class="computeroutput"><span class="identifier">mp_to_bool</span><span class="special"><</span><span class="identifier">U</span><span class="special">></span></code>
|
||||
is <code class="computeroutput"><span class="identifier">mp_false</span></code>. <code class="computeroutput"><span class="identifier">mp_to_bool</span><span class="special"><</span><span class="identifier">U</span><span class="special">></span></code>
|
||||
is not <code class="computeroutput"><span class="identifier">mp_true</span></code>. <code class="computeroutput"><span class="identifier">mp_to_bool</span><span class="special"><</span><span class="identifier">U</span><span class="special">></span></code>
|
||||
is not evaluated for types after <code class="computeroutput"><span class="identifier">U</span></code>.
|
||||
If no such type exists, <code class="computeroutput"><span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code> is an alias for <code class="computeroutput"><span class="identifier">mp_true</span></code>.
|
||||
(<code class="computeroutput"><span class="identifier">mp_and</span><span class="special"><></span></code>
|
||||
is <code class="computeroutput"><span class="identifier">mp_true</span></code>.)
|
||||
</p>
|
||||
<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">R1</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">mp_true</span><span class="special">,</span> <span class="identifier">mp_true</span><span class="special">>;</span> <span class="comment">// mp_true</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R2</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">mp_false</span><span class="special">,</span> <span class="keyword">void</span><span class="special">>;</span> <span class="comment">// mp_false, void is not reached</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R3</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">mp_false</span><span class="special">,</span> <span class="identifier">mp_false</span><span class="special">>;</span> <span class="comment">// mp_false</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R4</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="keyword">void</span><span class="special">,</span> <span class="identifier">mp_true</span><span class="special">>;</span> <span class="comment">// mp_false (!)</span>
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
@@ -2194,6 +2210,11 @@
|
||||
The upside is that <code class="computeroutput"><span class="identifier">mp_all</span></code>
|
||||
is faster on legacy compilers.
|
||||
</p>
|
||||
<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">R1</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">mp_true</span><span class="special">,</span> <span class="identifier">mp_true</span><span class="special">>;</span> <span class="comment">// mp_true</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R2</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">mp_false</span><span class="special">,</span> <span class="keyword">void</span><span class="special">>;</span> <span class="comment">// compile-time error</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R3</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="identifier">mp_false</span><span class="special">,</span> <span class="identifier">mp_false</span><span class="special">>;</span> <span class="comment">// mp_false</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R4</span> <span class="special">=</span> <span class="identifier">mp_and</span><span class="special"><</span><span class="keyword">void</span><span class="special">,</span> <span class="identifier">mp_true</span><span class="special">>;</span> <span class="comment">// compile-time error</span>
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
@@ -2203,16 +2224,18 @@
|
||||
</pre>
|
||||
<p>
|
||||
<code class="computeroutput"><span class="identifier">mp_or</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code>
|
||||
is an alias for <code class="computeroutput"><span class="identifier">mp_true</span></code>
|
||||
if there exists a type <code class="computeroutput"><span class="identifier">U</span></code>
|
||||
in <code class="computeroutput"><span class="identifier">T</span><span class="special">...</span></code>
|
||||
for which <code class="computeroutput"><span class="identifier">mp_to_bool</span><span class="special"><</span><span class="identifier">U</span><span class="special">></span></code>
|
||||
is <code class="computeroutput"><span class="identifier">mp_true</span></code>. <code class="computeroutput"><span class="identifier">mp_to_bool</span><span class="special"><</span><span class="identifier">U</span><span class="special">></span></code>
|
||||
is not evaluated for types after <code class="computeroutput"><span class="identifier">U</span></code>.
|
||||
If no such type exists, <code class="computeroutput"><span class="identifier">mp_or</span><span class="special"><</span><span class="identifier">T</span><span class="special">...></span></code> is an alias for <code class="computeroutput"><span class="identifier">mp_false</span></code>.
|
||||
(<code class="computeroutput"><span class="identifier">mp_or</span><span class="special"><></span></code>
|
||||
is <code class="computeroutput"><span class="identifier">mp_false</span></code>.)
|
||||
applies <code class="computeroutput"><span class="identifier">mp_to_bool</span></code> to the
|
||||
types in <code class="computeroutput"><span class="identifier">T</span><span class="special">...</span></code>,
|
||||
in order. If the result of an application is <code class="computeroutput"><span class="identifier">mp_true</span></code>,
|
||||
<code class="computeroutput"><span class="identifier">mp_or</span></code> returns <code class="computeroutput"><span class="identifier">mp_true</span></code>. If all results are <code class="computeroutput"><span class="identifier">mp_false</span></code>, returns <code class="computeroutput"><span class="identifier">mp_false</span></code>.
|
||||
<code class="computeroutput"><span class="identifier">mp_or</span><span class="special"><></span></code>
|
||||
is <code class="computeroutput"><span class="identifier">mp_false</span></code>.
|
||||
</p>
|
||||
<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">R1</span> <span class="special">=</span> <span class="identifier">mp_or</span><span class="special"><</span><span class="identifier">mp_true</span><span class="special">,</span> <span class="identifier">mp_false</span><span class="special">>;</span> <span class="comment">// mp_true</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R2</span> <span class="special">=</span> <span class="identifier">mp_or</span><span class="special"><</span><span class="identifier">mp_true</span><span class="special">,</span> <span class="keyword">void</span><span class="special">>;</span> <span class="comment">// mp_true, void is not reached</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R3</span> <span class="special">=</span> <span class="identifier">mp_or</span><span class="special"><</span><span class="identifier">mp_false</span><span class="special">,</span> <span class="identifier">mp_false</span><span class="special">>;</span> <span class="comment">// mp_false</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R4</span> <span class="special">=</span> <span class="identifier">mp_or</span><span class="special"><</span><span class="keyword">void</span><span class="special">,</span> <span class="identifier">mp_true</span><span class="special">>;</span> <span class="comment">// compile-time error</span>
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
@@ -2228,6 +2251,11 @@
|
||||
otherwise. Same as <code class="computeroutput"><span class="identifier">mp_or</span></code>,
|
||||
but does not perform short-circuit evaluation.
|
||||
</p>
|
||||
<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">R1</span> <span class="special">=</span> <span class="identifier">mp_any</span><span class="special"><</span><span class="identifier">mp_true</span><span class="special">,</span> <span class="identifier">mp_false</span><span class="special">>;</span> <span class="comment">// mp_true</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R2</span> <span class="special">=</span> <span class="identifier">mp_any</span><span class="special"><</span><span class="identifier">mp_true</span><span class="special">,</span> <span class="keyword">void</span><span class="special">>;</span> <span class="comment">// compile-time error</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R3</span> <span class="special">=</span> <span class="identifier">mp_any</span><span class="special"><</span><span class="identifier">mp_false</span><span class="special">,</span> <span class="identifier">mp_false</span><span class="special">>;</span> <span class="comment">// mp_false</span>
|
||||
<span class="keyword">using</span> <span class="identifier">R4</span> <span class="special">=</span> <span class="identifier">mp_any</span><span class="special"><</span><span class="keyword">void</span><span class="special">,</span> <span class="identifier">mp_true</span><span class="special">>;</span> <span class="comment">// compile-time error</span>
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
@@ -2450,7 +2478,7 @@
|
||||
</div>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"><p><small>Last revised: May 23, 2017 at 20:23:39 GMT</small></p></td>
|
||||
<td align="left"><p><small>Last revised: May 23, 2017 at 22:20:27 GMT</small></p></td>
|
||||
<td align="right"><div class="copyright-footer"></div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
|
||||
Reference in New Issue
Block a user