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Split Utility/IdentityType and Functional/OverloadedFunction tests into smaller tests.

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Updated docs for ScopeExit, LocalFunction, Utility/IdentityType, and Functional/OverloadedFunction.

[SVN r77484]
This commit is contained in:
Lorenzo Caminiti
2012-03-22 20:54:20 +00:00
parent 6932e9b1dc
commit b2dd5d8ac5
14 changed files with 167 additions and 121 deletions
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2
overloaded_function/doc/html/BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX.html
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@ -33,7 +33,7 @@
</span>BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX</pre></div>
<div class="refsect1">
<a name="id833145"></a><h2>Description</h2>
<a name="id872024"></a><h2>Description</h2>
<p>If this macro is left undefined by the user, it has a default value of 5 (increasing this number might increase compilation time). When specified by the user, this macro must be a non-negative integer number.</p>
<p><span class="bold"><strong>See:</strong></span> <a class="link" href="boost_functional_overloadedfunction/Getting_Started.html" title="Getting Started"> Getting Started</a>, <code class="computeroutput"><a class="link" href="boost/overloaded_function.html" title="Class template overloaded_function">boost::overloaded_function</a></code>. </p>
</div>

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@ -33,7 +33,7 @@
</span>BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX</pre></div>
<div class="refsect1">
<a name="id833202"></a><h2>Description</h2>
<a name="id872082"></a><h2>Description</h2>
<p>If this macro is left undefined by the user, it has a default value of 5 (increasing this number might increase compilation time). When defined by the user, this macro must be an integer number greater or equal than 2 (because at least two distinct functions need to be specified in order to define an overload).</p>
<p><span class="bold"><strong>See:</strong></span> <a class="link" href="boost_functional_overloadedfunction/Getting_Started.html" title="Getting Started"> Getting Started</a>, <code class="computeroutput"><a class="link" href="boost/overloaded_function.html" title="Class template overloaded_function">boost::overloaded_function</a></code>. </p>
</div>

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@ -36,7 +36,7 @@
<a class="link" href="overloaded_function.html" title="Class template overloaded_function">overloaded_function</a><span class="special">&lt;</span> <span class="identifier">__function_type__</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">__function_type__</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">,</span><span class="special">...</span><span class="special">&gt;</span>
<span class="identifier">make_overloaded_function</span><span class="special">(</span><span class="identifier">F1</span> f1<span class="special">,</span> <span class="identifier">F2</span> f2<span class="special">,</span> <span class="special">...</span><span class="special">)</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id832964"></a><h2>Description</h2>
<a name="id871843"></a><h2>Description</h2>
<p>This function template creates and returns an <code class="computeroutput"><code class="computeroutput"><a class="link" href="overloaded_function.html" title="Class template overloaded_function">overloaded_function</a></code></code> function object that overloads all the specified functions <code class="computeroutput">f1</code>, <code class="computeroutput">f2</code>, etc.</p>
<p>The function types are internally determined from the template parameter types so they do not need to be explicitly specified. Therefore, this function template usually has a more concise syntax when compared with <code class="computeroutput"><code class="computeroutput"><a class="link" href="overloaded_function.html" title="Class template overloaded_function">overloaded_function</a></code></code>. This is especially useful when the explicit type of the returned <code class="computeroutput"><code class="computeroutput"><a class="link" href="overloaded_function.html" title="Class template overloaded_function">overloaded_function</a></code></code> does not need to be known (e.g., when used with Boost.Typeof's <code class="computeroutput">BOOST_AUTO</code> (or C++11 <code class="computeroutput">auto</code>) or when the overloaded function object is handled using a function template parameter, see the <a class="link" href="../boost_functional_overloadedfunction/Tutorial.html" title="Tutorial">Tutorial</a> section).</p>
<p>The maximum number of functions to overload is given by the <code class="computeroutput"><code class="computeroutput"><a class="link" href="../BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX.html" title="Macro BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX">BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX</a></code></code> configuration macro.</p>

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@ -35,19 +35,19 @@
<span class="keyword">class</span> <a class="link" href="overloaded_function.html" title="Class template overloaded_function">overloaded_function</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// <a class="link" href="overloaded_function.html#boost.overloaded_functionconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="overloaded_function.html#id294124-bb"><span class="identifier">overloaded_function</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<a class="link" href="overloaded_function.html#id299641-bb"><span class="identifier">overloaded_function</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="overloaded_function.html#id294054-bb">public member functions</a></span>
<span class="comment">// <a class="link" href="overloaded_function.html#id299571-bb">public member functions</a></span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">result_type</span>
<a class="link" href="overloaded_function.html#id294056-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<a class="link" href="overloaded_function.html#id299574-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg2_type</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">result_type</span>
<a class="link" href="overloaded_function.html#id294083-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<a class="link" href="overloaded_function.html#id299600-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg2_type</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id832217"></a><h2>Description</h2>
<a name="id870004"></a><h2>Description</h2>
<p>This function object aggregates together calls to functions of all the specified function types <code class="computeroutput">F1</code>, <code class="computeroutput">F2</code>, etc. The specified function types must have distinct parameters from one another and they must be in the following format (which is the Boost.Function preferred syntax): </p>
<pre class="programlisting"> <span class="identifier">result_type</span> <span class="special">(</span><span class="identifier">argument1_type</span><span class="special">,</span> <span class="identifier">argumgnet2_type</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span>
</pre>
@ -55,27 +55,27 @@
<p>The maximum number of functions to overload is given by the <code class="computeroutput"><a class="link" href="../BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX.html" title="Macro BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX">BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX</a></code> configuration macro. The maximum number of function parameters for each of the specified function types is given by the <code class="computeroutput"><a class="link" href="../BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX.html" title="Macro BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX">BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX</a></code> configuration macro.</p>
<p><span class="bold"><strong>See:</strong></span> <a class="link" href="../boost_functional_overloadedfunction/Tutorial.html" title="Tutorial">Tutorial</a> section, <code class="computeroutput"><a class="link" href="make_overloaded_function.html" title="Function template make_overloaded_function">make_overloaded_function</a></code>, <code class="computeroutput"><a class="link" href="../BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX.html" title="Macro BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX">BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_OVERLOAD_MAX</a></code>, <code class="computeroutput"><a class="link" href="../BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX.html" title="Macro BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX">BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX</a></code>, Boost.Function. </p>
<div class="refsect2">
<a name="id832337"></a><h3>
<a name="id871216"></a><h3>
<a name="boost.overloaded_functionconstruct-copy-destruct"></a><code class="computeroutput">overloaded_function</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><a name="id294124-bb"></a><span class="identifier">overloaded_function</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<pre class="literallayout"><a name="id299641-bb"></a><span class="identifier">overloaded_function</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span><span class="special">;</span></pre>Construct the overloaded function object. <p>Any function pointer, function reference, and monomorphic function object that can be converted to a <code class="computeroutput">boost::function</code> function object can be specified as parameter. </p>
</li></ol></div>
</div>
<div class="refsect2">
<a name="id832462"></a><h3>
<a name="id294054-bb"></a><code class="computeroutput">overloaded_function</code> public member functions</h3>
<a name="id871341"></a><h3>
<a name="id299571-bb"></a><code class="computeroutput">overloaded_function</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">result_type</span>
<a name="id294056-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<a name="id299574-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F1</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg2_type</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Call operator matching the signature of the function type specified as 1st template parameter. <p>This will in turn invoke the call operator of the 1st function passed to the constructor. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">result_type</span>
<a name="id294083-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<a name="id299600-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg1_type</span><span class="special">,</span>
<span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">function_traits</span><span class="special">&lt;</span> <span class="identifier">F2</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">arg2_type</span><span class="special">,</span> <span class="special">...</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Call operator matching the signature of the function type specified as 2nd template parameter. <p>This will in turn invoke the call operator of the 2nd function passed to the constructor.</p>
<p><span class="bold"><strong>Note:</strong></span> Similar call operators are present for all specified function types <code class="computeroutput">F1</code>, <code class="computeroutput">F2</code>, etc (even if not exhaustively listed by this documentation). </p>
</li>

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@ -41,9 +41,22 @@
and Platforms</a>
</h3></div></div></div>
<p>
The library was tested by the authors on GCC 4.5.3 (with and without C++11
features <code class="literal">-std=c++0x</code>) and MSVC 8.0 under Linux, Cygwin,
and Windows 7.
The authors originally developed and tested the library on:
</p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
GNU Compiler Collection (GCC) C++ 4.5.3 (with and without C++11 features
enabled <code class="computeroutput"><span class="special">-</span><span class="identifier">std</span><span class="special">=</span><span class="identifier">c</span><span class="special">++</span><span class="number">0</span><span class="identifier">x</span></code>)
on Cygwin.
</li>
<li class="listitem">
Miscrosoft Visual C++ (MSVC) 8.0 on Windows 7.
</li>
</ol></div>
<p>
See the library <a href="http://www.boost.org/development/tests/release/developer/functional-overloaded_function.html" target="_top">regressions
test results</a> for detailed information on supported compilers and
platforms.
</p>
</div>
<div class="section boost_functional_overloadedfunction_Getting_Started_installation">

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@ -42,23 +42,15 @@
Consider the following functions with distinct signatures:
</p>
<p>
</p>
<pre class="programlisting"><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">identity_s</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span> <span class="comment">// As pointer.</span>
<span class="keyword">int</span> <span class="identifier">identity_i_impl</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span>
<span class="keyword">int</span> <span class="special">(&amp;</span><span class="identifier">identity_i</span><span class="special">)(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">identity_i_impl</span><span class="special">;</span> <span class="comment">// Function reference.</span>
<span class="keyword">double</span> <span class="identifier">identity_d_impl</span><span class="special">(</span><span class="keyword">double</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span><span class="keyword">double</span> <span class="special">(</span><span class="keyword">double</span><span class="special">)&gt;</span> <span class="identifier">identity_d</span> <span class="special">=</span> <span class="identifier">identity_d_impl</span><span class="special">;</span> <span class="comment">// Functor.</span>
</pre>
<p>
[identity_decls]
</p>
<p>
This library header <code class="computeroutput"><a class="link" href="../reference.html#header.boost.functional.overloaded_function_hpp" title="Header &lt;boost/functional/overloaded_function.hpp&gt;">boost/functional/overloaded_function.hpp</a></code>
provides a <code class="computeroutput"><a class="link" href="../boost/overloaded_function.html" title="Class template overloaded_function">boost::overloaded_function</a></code>
class template that creates a single overloaded function object that can
be used to call the specified functions instead of using the separate function
names (see also <a href="../../../test/identity.cpp" target="_top"><code class="literal">identity.cpp</code></a>):
names (see also <a href="../../../test/functor.cpp" target="_top"><code class="literal">functor.cpp</code></a>
and <a href="../../../test/identity.hpp" target="_top"><code class="literal">identity.hpp</code></a>):
</p>
<p>
</p>
@ -114,7 +106,8 @@
<p>
The <code class="computeroutput"><a class="link" href="../boost/make_overloaded_function.html" title="Function template make_overloaded_function">boost::make_overloaded_function</a></code>
function template can be useful when used together with <a href="http://www.boost.org/doc/libs/typeof" target="_top">Boost.Typeof</a>'s
<code class="computeroutput"><span class="identifier">BOOST_AUTO</span></code> (or C++11 <code class="computeroutput"><span class="keyword">auto</span></code>). For example (see also <a href="../../../test/identity.cpp" target="_top"><code class="literal">identity.cpp</code></a>):
<code class="computeroutput"><span class="identifier">BOOST_AUTO</span></code> (or C++11 <code class="computeroutput"><span class="keyword">auto</span></code>). For example (see also <a href="../../../test/make_decl.cpp" target="_top"><code class="literal">make_decl.cpp</code></a>
and <a href="../../../test/identity.hpp" target="_top"><code class="literal">identity.hpp</code></a>):
</p>
<p>
</p>
@ -143,7 +136,8 @@
Another case where <code class="computeroutput"><a class="link" href="../boost/make_overloaded_function.html" title="Function template make_overloaded_function">boost::make_overloaded_function</a></code>
can be useful is when the overloaded function object is passed to a function
template which can hide the specific <code class="computeroutput"><a class="link" href="../boost/overloaded_function.html" title="Class template overloaded_function">boost::overloaded_function</a></code>
type using a template parameter. For example (see also <a href="../../../test/identity.cpp" target="_top"><code class="literal">identity.cpp</code></a>):
type using a template parameter. For example (see also <a href="../../../test/make_call.cpp" target="_top"><code class="literal">make_call.cpp</code></a>
and <a href="../../../test/identity.hpp" target="_top"><code class="literal">identity.hpp</code></a>):
</p>
<p>
</p>

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@ -69,16 +69,7 @@
Consider the following functions with distinct signatures:
</p>
<p>
</p>
<pre class="programlisting"><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">identity_s</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span> <span class="comment">// As pointer.</span>
<span class="keyword">int</span> <span class="identifier">identity_i_impl</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span>
<span class="keyword">int</span> <span class="special">(&amp;</span><span class="identifier">identity_i</span><span class="special">)(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">identity_i_impl</span><span class="special">;</span> <span class="comment">// Function reference.</span>
<span class="keyword">double</span> <span class="identifier">identity_d_impl</span><span class="special">(</span><span class="keyword">double</span> <span class="identifier">x</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">x</span><span class="special">;</span> <span class="special">}</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span><span class="special">&lt;</span><span class="keyword">double</span> <span class="special">(</span><span class="keyword">double</span><span class="special">)&gt;</span> <span class="identifier">identity_d</span> <span class="special">=</span> <span class="identifier">identity_d_impl</span><span class="special">;</span> <span class="comment">// Functor.</span>
</pre>
<p>
[identity_decls]
</p>
<p>
Instead of calling them using their separate names (here <code class="computeroutput"><span class="identifier">BOOST_CHECK</span></code>
@ -97,7 +88,8 @@
It is possible to use this library to create a single <a href="http://en.wikipedia.org/wiki/Function_overloading" target="_top">overloaded</a>
function object (or <a href="http://en.wikipedia.org/wiki/Functor" target="_top">functor</a>)
named <code class="computeroutput"><span class="identifier">identity</span></code> that aggregates
together the calls to the specific functions (see also <a href="../../test/identity.cpp" target="_top"><code class="literal">identity.cpp</code></a>):
together the calls to the specific functions (see also <a href="../../test/functor.cpp" target="_top"><code class="literal">functor.cpp</code></a>
and <a href="../../test/identity.hpp" target="_top"><code class="literal">identity.hpp</code></a>):
</p>
<p>
</p>
@ -133,7 +125,7 @@
</div>
</div>
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<td align="left"><p><small>Last revised: February 20, 2012 at 20:10:59 GMT</small></p></td>
<td align="left"><p><small>Last revised: March 22, 2012 at 20:51:03 GMT</small></p></td>
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