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| 23 | <a accesskey="p" href="tutorial.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../function.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="../bad_function_call.html"><img src="../images/next.png" alt="Next"></a> |
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| 24 | </div> |
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| 25 | <div class="section" lang="en"> |
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| 26 | <div class="titlepage"><div><div><h3 class="title"> |
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| 27 | <a name="function.reference"></a>Reference</h3></div></div></div> |
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| 28 | <div class="toc"><dl> |
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| 29 | <dt><span class="section"><a href="reference.html#function.definitions">Definitions</a></span></dt> |
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| 30 | <dt><span class="section"><a href="reference.html#header.boost.function.hpp">Header <boost/function.hpp></a></span></dt> |
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| 31 | <dt><span class="section"><a href="reference.html#id2358074">Header <boost/function_equal.hpp></a></span></dt> |
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| 32 | </dl></div> |
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| 33 | <div class="section" lang="en"> |
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| 34 | <div class="titlepage"><div><div><h4 class="title"> |
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| 35 | <a name="function.definitions"></a>Definitions</h4></div></div></div> |
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| 36 | <div class="itemizedlist"><ul type="disc"> |
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| 37 | <li> |
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| 38 | <p>A function object <code class="computeroutput">f</code> is |
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| 39 | <span class="emphasis"><em>compatible</em></span> if for the given set of argument |
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| 40 | types <code class="computeroutput">Arg1</code>, |
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| 41 | <code class="computeroutput">Arg2</code>, ..., |
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| 42 | <code class="computeroutput">ArgN</code> and a |
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| 43 | return type <code class="computeroutput">ResultType</code>, the |
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| 44 | appropriate following function is well-formed: |
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| 45 | </p> |
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| 46 | <pre class="programlisting"><span class="emphasis"><em>// if ResultType is not <span class="bold"><strong>void</strong></span></em></span> |
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| 47 | ResultType foo(Arg1 arg1, Arg2 arg2, ..., Arg<span class="emphasis"><em>N</em></span> arg<span class="emphasis"><em>N</em></span>) |
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| 48 | { |
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| 49 | <span class="bold"><strong>return</strong></span> f(arg1, arg2, ..., arg<span class="emphasis"><em>N</em></span>); |
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| 50 | } |
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| 51 | |
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| 52 | <span class="emphasis"><em>// if ResultType is <span class="bold"><strong>void</strong></span></em></span> |
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| 53 | ResultType foo(Arg1 arg1, Arg2 arg2, ..., Arg<span class="emphasis"><em>N</em></span> arg<span class="emphasis"><em>N</em></span>) |
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| 54 | { |
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| 55 | f(arg1, arg2, ..., arg<span class="emphasis"><em>N</em></span>); |
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| 56 | } |
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| 57 | </pre> |
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| 58 | <p> A special provision is made for pointers to member |
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| 59 | functions. Though they are not function objects, Boost.Function |
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| 60 | will adapt them internally to function objects. This requires |
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| 61 | that a pointer to member function of the form <code class="computeroutput">R |
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| 62 | (X::*mf)(Arg1, Arg2, ..., ArgN) |
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| 63 | cv-quals</code> be adapted to a |
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| 64 | function object with the following function call operator |
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| 65 | overloads: |
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| 66 | </p> |
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| 67 | <pre class="programlisting"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename P</strong></span>> |
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| 68 | R <span class="bold"><strong>operator</strong></span>()(<span class="emphasis"><em>cv-quals</em></span> P& x, Arg1 arg1, Arg2 arg2, ..., Arg<span class="emphasis"><em>N</em></span> arg<span class="emphasis"><em>N</em></span>) <span class="bold"><strong>const</strong></span> |
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| 69 | { |
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| 70 | <span class="bold"><strong>return</strong></span> (*x).*mf(arg1, arg2, ..., arg<span class="emphasis"><em>N</em></span>); |
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| 71 | } |
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| 72 | </pre> |
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| 73 | </li> |
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| 74 | <li><p>A function object <code class="computeroutput">f</code> of |
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| 75 | type <code class="computeroutput">F</code> is |
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| 76 | <span class="emphasis"><em>stateless</em></span> if it is a function pointer or if |
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| 77 | <code class="computeroutput">boost::is_stateless<T></code> |
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| 78 | is true. The construction of or copy to a Boost.Function object |
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| 79 | from a stateless function object will not cause exceptions to be |
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| 80 | thrown and will not allocate any storage. |
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| 81 | </p></li> |
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| 82 | </ul></div> |
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| 83 | </div> |
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| 84 | <div class="section" lang="en"> |
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| 85 | <div class="titlepage"><div><div><h4 class="title"> |
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| 86 | <a name="header.boost.function.hpp"></a>Header <<a href="../../../boost/function.hpp" target="_top">boost/function.hpp</a>></h4></div></div></div> |
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| 87 | <pre class="synopsis"><span class="bold"><strong>namespace</strong></span> boost { |
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| 88 | <span class="bold"><strong>class</strong></span> <a href="../bad_function_call.html" title="Class bad_function_call">bad_function_call</a>; |
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| 89 | <span class="bold"><strong>class</strong></span> <a href="../function_base.html" title="Class function_base">function_base</a>; |
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| 90 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> R, <span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, |
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| 91 | <span class="bold"><strong>typename</strong></span> Allocator = std::allocator<<span class="bold"><strong>void</strong></span>> > |
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| 92 | <span class="bold"><strong>class</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a>; |
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| 93 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator> |
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| 94 | <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="../functionN.html#id2399780">swap</a>(<a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&, |
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| 95 | <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&); |
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| 96 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 97 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 98 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2513394-bb"><span class="bold"><strong>operator</strong></span>==</a>(<span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&, Functor); |
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| 99 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 100 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 101 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2443650-bb"><span class="bold"><strong>operator</strong></span>==</a>(Functor, <span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&); |
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| 102 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 103 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 104 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2378702-bb"><span class="bold"><strong>operator</strong></span>==</a>(<span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&, |
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| 105 | <a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>); |
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| 106 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 107 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 108 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2361523-bb"><span class="bold"><strong>operator</strong></span>==</a>(<a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>, |
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| 109 | <span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&); |
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| 110 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator1, |
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| 111 | <span class="bold"><strong>typename</strong></span> U1, <span class="bold"><strong>typename</strong></span> U2, ..., <span class="bold"><strong>typename</strong></span> UN, <span class="bold"><strong>typename</strong></span> Allocator2> |
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| 112 | <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="../functionN.html#id2443717-bb"><span class="bold"><strong>operator</strong></span>==</a>(<span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator1>&, |
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| 113 | <span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><U1, U2, ..., UN, Allocator2>&); |
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| 114 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 115 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 116 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2376561-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&, Functor); |
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| 117 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 118 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 119 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2407091-bb"><span class="bold"><strong>operator</strong></span>!=</a>(Functor, <span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&); |
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| 120 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 121 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 122 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2526244-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&, |
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| 123 | <a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>); |
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| 124 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator, |
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| 125 | <span class="bold"><strong>typename</strong></span> Functor> |
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| 126 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../functionN.html#id2361938-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>, |
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| 127 | <span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator>&); |
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| 128 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T1, <span class="bold"><strong>typename</strong></span> T2, ..., <span class="bold"><strong>typename</strong></span> TN, <span class="bold"><strong>typename</strong></span> Allocator1, |
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| 129 | <span class="bold"><strong>typename</strong></span> U1, <span class="bold"><strong>typename</strong></span> U2, ..., <span class="bold"><strong>typename</strong></span> UN, <span class="bold"><strong>typename</strong></span> Allocator2> |
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| 130 | <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="../functionN.html#id2434733-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><T1, T2, ..., TN, Allocator1>&, |
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| 131 | <span class="bold"><strong>const</strong></span> <a href="../functionN.html" title="Class template functionN">functionN</a><U1, U2, ..., UN, Allocator2>&); |
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| 132 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator = std::allocator<<span class="bold"><strong>void</strong></span>> > |
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| 133 | <span class="bold"><strong>class</strong></span> <a href="../boost/function.html" title="Class template function">function</a>; |
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| 134 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator> |
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| 135 | <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="../boost/function.html#id2408551">swap</a>(<a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&, |
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| 136 | <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&); |
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| 137 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 138 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2341297-bb"><span class="bold"><strong>operator</strong></span>==</a>(<span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&, Functor); |
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| 139 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 140 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2399796-bb"><span class="bold"><strong>operator</strong></span>==</a>(Functor, <span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&); |
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| 141 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 142 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2444136-bb"><span class="bold"><strong>operator</strong></span>==</a>(<span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&, |
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| 143 | <a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>); |
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| 144 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 145 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2477463-bb"><span class="bold"><strong>operator</strong></span>==</a>(<a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>, |
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| 146 | <span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&); |
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| 147 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature1, <span class="bold"><strong>typename</strong></span> Allocator1, <span class="bold"><strong>typename</strong></span> Signature2, |
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| 148 | <span class="bold"><strong>typename</strong></span> Allocator2> |
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| 149 | <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="../boost/function.html#id2378044-bb"><span class="bold"><strong>operator</strong></span>==</a>(<span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature1, Allocator1>&, |
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| 150 | <span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature2, Allocator2>&); |
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| 151 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 152 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2336228-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&, Functor); |
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| 153 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 154 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2337224-bb"><span class="bold"><strong>operator</strong></span>!=</a>(Functor, <span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&); |
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| 155 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 156 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2508816-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&, |
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| 157 | <a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>); |
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| 158 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature, <span class="bold"><strong>typename</strong></span> Allocator, <span class="bold"><strong>typename</strong></span> Functor> |
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| 159 | <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../boost/function.html#id2407103-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<a href="../reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a><Functor>, |
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| 160 | <span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature, Allocator>&); |
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| 161 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Signature1, <span class="bold"><strong>typename</strong></span> Allocator1, <span class="bold"><strong>typename</strong></span> Signature2, |
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| 162 | <span class="bold"><strong>typename</strong></span> Allocator2> |
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| 163 | <span class="type"><span class="bold"><strong>void</strong></span></span> <a href="../boost/function.html#id2469309-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature1, Allocator1>&, |
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| 164 | <span class="bold"><strong>const</strong></span> <a href="../boost/function.html" title="Class template function">function</a><Signature2, Allocator2>&); |
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| 165 | }</pre> |
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| 166 | </div> |
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| 167 | <div class="section" lang="en"> |
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| 168 | <div class="titlepage"><div><div><h4 class="title"> |
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| 169 | <a name="id2358074"></a>Header <<a href="../../../boost/function_equal.hpp" target="_top">boost/function_equal.hpp</a>></h4></div></div></div> |
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| 170 | <pre class="synopsis"><span class="bold"><strong>namespace</strong></span> boost { |
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| 171 | <span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> F, <span class="bold"><strong>typename</strong></span> G> <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="../function_equal.html" title="Function template function_equal">function_equal</a>(<span class="bold"><strong>const</strong></span> F&, <span class="bold"><strong>const</strong></span> G&); |
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| 172 | }</pre> |
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| 173 | </div> |
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| 174 | </div> |
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| 175 | <table width="100%"><tr> |
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| 176 | <td align="left"></td> |
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| 177 | <td align="right"><small>Copyright © 2001-2004 Douglas Gregor</small></td> |
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| 178 | </tr></table> |
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| 179 | <hr> |
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| 182 | </div> |
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