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Joel de Guzman
2007-09-22 01:05:29 +00:00
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Functional</title>
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<link rel="start" href="../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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@ -62,14 +62,14 @@
through a function object interface.
</p>
<a name="fusion.functional.header"></a><h3>
<a name="id1241027"></a>
<a name="id641172"></a>
<a href="functional.html#fusion.functional.header">Header</a>
</h3>
<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">fusion</span><span class="special">/</span><span class="identifier">functional</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.functional.fused_and_unfused_forms"></a><h3>
<a name="id1241101"></a>
<a name="id641256"></a>
<a href="functional.html#fusion.functional.fused_and_unfused_forms">Fused and unfused
forms</a>
</h3>
@ -83,7 +83,7 @@
It is a name and a tuple written next to each other, left-to-right.
</p>
<p>
Although the C++ syntax does not allow to replace <code class="literal">(a,b,c)</code>
Although the C++ syntax does not allow to replace <tt class="literal">(a,b,c)</tt>
with some Fusion <a href="sequences.html" title="Sequences">Sequence</a>, introducing
yet another function provides a solution:
</p>
@ -91,22 +91,22 @@
<span class="identifier">invoke</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span><span class="identifier">my_sequence</span><span class="special">)</span>
</pre>
<p>
Alternatively it is possible to apply a simple transformation to <code class="literal">f</code>
Alternatively it is possible to apply a simple transformation to <tt class="literal">f</tt>
in order to achieve the same effect:
</p>
<pre class="programlisting">
<span class="identifier">f</span> <span class="identifier">tuple</span> <span class="special">&lt;=&gt;</span> f' <span class="special">(</span><span class="identifier">tuple</span><span class="special">)</span>
</pre>
<p>
Now, <code class="literal">f'</code> is an unary function that takes the arguments to
<code class="computeroutput"><span class="identifier">f</span></code> as a tuple; <code class="literal">f'</code>
is the <span class="emphasis"><em>fused</em></span> form of <code class="computeroutput"><span class="identifier">f</span></code>.
Now, <tt class="literal">f'</tt> is an unary function that takes the arguments to
<tt class="computeroutput"><span class="identifier">f</span></tt> as a tuple; <tt class="literal">f'</tt>
is the <span class="emphasis"><em>fused</em></span> form of <tt class="computeroutput"><span class="identifier">f</span></tt>.
Reading the above equivalence right-to-left to get the inverse transformation,
<code class="computeroutput"><span class="identifier">f</span></code> is the <span class="emphasis"><em>unfused</em></span>
form of <code class="literal">f'</code>.
<tt class="computeroutput"><span class="identifier">f</span></tt> is the <span class="emphasis"><em>unfused</em></span>
form of <tt class="literal">f'</tt>.
</p>
<a name="fusion.functional.calling_functions_and_function_objects"></a><h3>
<a name="id1241336"></a>
<a name="id641521"></a>
<a href="functional.html#fusion.functional.calling_functions_and_function_objects">Calling
functions and function objects</a>
</h3>
@ -134,7 +134,7 @@
instance for the given argument.
</p>
<a name="fusion.functional.making_fusion_code_callable_through_a_function_object_interface"></a><h3>
<a name="id1241396"></a>
<a name="id641592"></a>
<a href="functional.html#fusion.functional.making_fusion_code_callable_through_a_function_object_interface">Making
Fusion code callable through a function object interface</a>
</h3>
@ -159,7 +159,7 @@
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