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Author SHA1 Message Date
927e259e11 Branch for developing Bitten client/server testing
[SVN r41004]
2007-11-10 22:53:12 +00:00
22 changed files with 390 additions and 1127 deletions

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@ -1,16 +1,5 @@
# Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
project boost/doc ;
import boostbook : boostbook ;
boostbook function-doc
:
function.xml
:
<xsl:param>boost.root=../../../..
<format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/doc/html
;
boostbook function-doc : function.xml ;

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@ -1,11 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<section id="function.faq" last-revision="$Date$">

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@ -1,11 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<section id="function.history" last-revision="$Date$">
@ -13,42 +6,6 @@
<itemizedlist spacing="compact">
<listitem><para><bold>Version 1.37.0</bold>: </para>
<itemizedlist spacing="compact">
<listitem><para>Improved the performance of Boost.Function's
swap() operation for large function objects. Original patch
contributed by Niels Dekker.</para></listitem>
<listitem><para>Added a new header &lt;boost/function/function_typeof.hpp&gt; that provides support for using the Boost.Typeof library on Boost.Function objects.</para></listitem>
<listitem><para>Added a new header &lt;boost/function/function_fwd.hpp&gt; that provides support for using the Boost.Typeof library on Boost.Function objects.</para></listitem>
<listitem><para>The <methodname alt="boost::function::target">target</methodname>()
function now respects the cv-qualifiers of function objects
stored by reference
(using <classname>boost::reference_wrapper</classname>), such
that a reference to a <code>const</code> function object cannot
be accessed as a reference to a non-<code>const</code> function
object.</para></listitem>
</itemizedlist>
</listitem>
<listitem><para><bold>Version 1.36.0</bold>: </para>
<itemizedlist spacing="compact">
<listitem><para>Boost.Function now implements allocator support
in the same way that is is provided in C++0x, based on C++
committee
proposal <ulink url="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2308.html">N2308</ulink>. This
change removes the <computeroutput>Allocator</computeroutput>
template parameter of <classname>boost::function</classname> in
favor of a constructor that takes an argument. While this is a
backward-incompatible change, it is likely to affect only a few
users. This change to Function was contributed by Emil
Dotchevski, which also authored the corresponding C++ committee
proposal.</para></listitem>
</itemizedlist>
</listitem>
<listitem><para><bold>Version 1.34.0</bold>: </para>
<itemizedlist spacing="compact">
<listitem><para>Boost.Function now implements a small buffer optimization, which can drastically improve the performance when copying or construction Boost.Function objects storing small function objects. For instance, <code>bind(&amp;X:foo, &amp;x, _1, _2)</code> requires no heap allocation when placed into a Boost.Function object. Note that some exception-safety guarantees have changed: assignment provides the basic exception guarantee and <code>swap()</code> may throw.</para></listitem>

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@ -1,11 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<section id="function.misc" last-revision="$Date$">
@ -24,7 +17,7 @@
<para> And, of course, function pointers have several advantages over Boost.Function:
<itemizedlist spacing="compact">
<listitem><para> Function pointers are smaller (the size of one pointer instead of four or more) </para></listitem>
<listitem><para> Function pointers are smaller (the size of one pointer instead of three) </para></listitem>
<listitem><para> Function pointers are faster (Boost.Function may require two calls through function pointers) </para></listitem>
<listitem><para> Function pointers are backward-compatible with C libraries.</para></listitem>
<listitem><para> More readable error messages. </para></listitem>
@ -37,12 +30,12 @@
<section>
<title>Function object wrapper size</title>
<para> Function object wrappers will be the size of a struct containing a member function pointer and two data pointers. The actual size can vary significantly depending on the underlying platform; on 32-bit Mac OS X with GCC, this amounts to 16 bytes, while it is 32 bytes Windows with Visual C++. Additionally, the function object target may be allocated on the heap, if it cannot be placed into the small-object buffer in the <code>boost::function</code> object.</para>
<para> Function object wrappers will be the size of two function pointers plus one function pointer or data pointer (whichever is larger). On common 32-bit platforms, this amounts to 12 bytes per wrapper. Additionally, the function object target will be allocated on the heap.</para>
</section>
<section>
<title>Copying efficiency</title>
<para> Copying function object wrappers may require allocating memory for a copy of the function object target. The default allocator may be replaced with a faster custom allocator or one may choose to allow the function object wrappers to only store function object targets by reference (using <computeroutput>ref</computeroutput>) if the cost of this cloning becomes prohibitive. Small function objects can be stored within the <code>boost::function</code> object itself, improving copying efficiency.</para>
<para> Copying function object wrappers may require allocating memory for a copy of the function object target. The default allocator may be replaced with a faster custom allocator or one may choose to allow the function object wrappers to only store function object targets by reference (using <computeroutput>ref</computeroutput>) if the cost of this cloning becomes prohibitive.</para>
</section>
<section>

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@ -1,11 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
@ -141,6 +134,9 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator">
<default><classname>std::allocator</classname>&lt;void&gt;</default>
</template-type-parameter>
</template>
<inherit access="public"><classname>function_base</classname></inherit>
@ -157,6 +153,7 @@
</description>
<typedef name="result_type"><type>R</type></typedef>
<typedef name="allocator_type"><type>Allocator</type></typedef>
<typedef name="argument_type">
<type>T1</type><purpose>If N == 1</purpose>
</typedef>
@ -212,19 +209,6 @@
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code> if <code>f</code> is nonempty, or <code>this-&gt;<methodname>empty</methodname>()</code> if <code>f</code> is empty.</simpara></postconditions>
</constructor>
<constructor>
<template>
<template-type-parameter name="F"/>
<template-type-parameter name="Allocator"/>
</template>
<parameter name="f"><paramtype>F</paramtype></parameter>
<parameter name="alloc"><paramtype>Allocator</paramtype></parameter>
<requires><simpara>F is a function object Callable from <code>this</code>, Allocator is an allocator. The copy constructor and destructor of Allocator shall not throw.</simpara></requires>
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code> if <code>f</code> is nonempty, or <code>this-&gt;<methodname>empty</methodname>()</code> if <code>f</code> is empty.</simpara></postconditions>
<effects><simpara>If memory allocation is required, the given allocator (or a copy of it) will be used to allocate that memory.</simpara></effects>
</constructor>
<destructor>
<effects><simpara>If <code>!this-&gt;<methodname>empty</methodname>()</code>, destroys the target of this.</simpara></effects>
@ -333,10 +317,11 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
</template>
<type>void</type>
<parameter name="f1"><paramtype><classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype><classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f1"><paramtype><classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype><classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
<effects><simpara><code>f1.<methodname>swap</methodname>(f2)</code></simpara></effects>
</function>
</free-function-group>
@ -349,10 +334,11 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
</signature>
<signature>
@ -361,11 +347,12 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
@ -373,10 +360,11 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
</signature>
<signature>
@ -385,11 +373,12 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
@ -397,14 +386,16 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator1"/>
<template-type-parameter name="U1"/>
<template-type-parameter name="U2"/>
<template-varargs/>
<template-type-parameter name="UN"/>
<template-type-parameter name="Allocator2"/>
</template>
<type>void</type>
<parameter name="f1"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>functionN</classname>&lt;U1, U2, ..., UN&gt;&amp;</paramtype></parameter>
<parameter name="f1"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator1&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>functionN</classname>&lt;U1, U2, ..., UN, Allocator2&gt;&amp;</paramtype></parameter>
</signature>
<returns><simpara>True when <code>f</code> stores an object of
@ -444,10 +435,11 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
</signature>
<signature>
@ -456,11 +448,12 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
@ -468,10 +461,11 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
</signature>
<signature>
@ -480,11 +474,12 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
@ -492,14 +487,16 @@
<template-type-parameter name="T2"/>
<template-varargs/>
<template-type-parameter name="TN"/>
<template-type-parameter name="Allocator1"/>
<template-type-parameter name="U1"/>
<template-type-parameter name="U2"/>
<template-varargs/>
<template-type-parameter name="UN"/>
<template-type-parameter name="Allocator2"/>
</template>
<type>void</type>
<parameter name="f1"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>functionN</classname>&lt;U1, U2, ..., UN&gt;&amp;</paramtype></parameter>
<parameter name="f1"><paramtype>const <classname>functionN</classname>&lt;T1, T2, ..., TN, Allocator1&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>functionN</classname>&lt;U1, U2, ..., UN, Allocator2&gt;&amp;</paramtype></parameter>
</signature>
<returns><simpara>True when <code>f</code> does not store an
@ -539,8 +536,11 @@
<template-type-parameter name="Signature">
<purpose>Function type R (T1, T2, ..., TN)</purpose>
</template-type-parameter>
<template-type-parameter name="Allocator">
<default><classname>std::allocator</classname>&lt;void&gt;</default>
</template-type-parameter>
</template>
<inherit access="public"><classname>functionN</classname>&lt;R, T1, T2, ..., TN&gt;</inherit>
<inherit access="public"><classname>functionN</classname>&lt;R, T1, T2, ..., TN, Allocator&gt;</inherit>
<purpose>A generalized function pointer that can be used for
callbacks or wrapping function objects.</purpose>
@ -562,6 +562,7 @@
</description>
<typedef name="result_type"><type>R</type></typedef>
<typedef name="allocator_type"><type>Allocator</type></typedef>
<typedef name="argument_type">
<type>T1</type><purpose>If N == 1</purpose>
</typedef>
@ -625,19 +626,6 @@
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code> if <code>f</code> is nonempty, or <code>this-&gt;<methodname>empty</methodname>()</code> if <code>f</code> is empty.</simpara></postconditions>
</constructor>
<constructor>
<template>
<template-type-parameter name="F"/>
<template-type-parameter name="Allocator"/>
</template>
<parameter name="f"><paramtype>F</paramtype></parameter>
<parameter name="alloc"><paramtype>Allocator</paramtype></parameter>
<requires><simpara>F is a function object Callable from <code>this</code>, Allocator is an allocator. The copy constructor and destructor of Allocator shall not throw.</simpara></requires>
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code> if <code>f</code> is nonempty, or <code>this-&gt;<methodname>empty</methodname>()</code> if <code>f</code> is empty.</simpara></postconditions>
<effects><simpara>If memory allocation is required, the given allocator (or a copy of it) will be used to allocate that memory.</simpara></effects>
</constructor>
<destructor>
<effects><simpara>If <code>!this-&gt;<methodname>empty</methodname>()</code>, destroys the target of <code>this</code>.</simpara></effects>
@ -750,10 +738,11 @@
<function name="swap">
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
</template>
<type>void</type>
<parameter name="f1"><paramtype><classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype><classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f1"><paramtype><classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype><classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
<effects><simpara><code>f1.<methodname>swap</methodname>(f2)</code></simpara></effects>
</function>
</free-function-group>
@ -763,47 +752,53 @@
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature1"/>
<template-type-parameter name="Allocator1"/>
<template-type-parameter name="Signature2"/>
<template-type-parameter name="Allocator2"/>
</template>
<type>void</type>
<parameter name="f1"><paramtype>const <classname>function</classname>&lt;Signature1&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>function</classname>&lt;Signature2&gt;&amp;</paramtype></parameter>
<parameter name="f1"><paramtype>const <classname>function</classname>&lt;Signature1, Allocator1&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>function</classname>&lt;Signature2, Allocator2&gt;&amp;</paramtype></parameter>
</signature>
<returns><simpara>True when <code>f</code> stores an object of
@ -838,47 +833,53 @@
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype>Functor</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature"/>
<template-type-parameter name="Allocator"/>
<template-type-parameter name="Functor"/>
</template>
<type>bool</type>
<parameter name="g"><paramtype><classname>reference_wrapper</classname>&lt;Functor&gt;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature&gt;&amp;</paramtype></parameter>
<parameter name="f"><paramtype>const <classname>function</classname>&lt;Signature, Allocator&gt;&amp;</paramtype></parameter>
</signature>
<signature>
<template>
<template-type-parameter name="Signature1"/>
<template-type-parameter name="Allocator1"/>
<template-type-parameter name="Signature2"/>
<template-type-parameter name="Allocator2"/>
</template>
<type>void</type>
<parameter name="f1"><paramtype>const <classname>function</classname>&lt;Signature1&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>function</classname>&lt;Signature2&gt;&amp;</paramtype></parameter>
<parameter name="f1"><paramtype>const <classname>function</classname>&lt;Signature1, Allocator1&gt;&amp;</paramtype></parameter>
<parameter name="f2"><paramtype>const <classname>function</classname>&lt;Signature2, Allocator2&gt;&amp;</paramtype></parameter>
</signature>
<returns><simpara>True when <code>f</code> does not store an

View File

@ -1,11 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<testsuite id="function.testsuite" last-revision="$Date$">

View File

@ -1,11 +1,4 @@
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<section xmlns:xi="http://www.w3.org/2001/XInclude" id="function.tutorial"
@ -35,12 +28,12 @@ form to use for your compiler.
<row>
<entry>
<itemizedlist spacing="compact">
<listitem><simpara>GNU C++ 2.95.x, 3.0.x and later versions</simpara></listitem>
<listitem><simpara>GNU C++ 2.95.x, 3.0.x, 3.1.x</simpara></listitem>
<listitem><simpara>Comeau C++ 4.2.45.2</simpara></listitem>
<listitem><simpara>SGI MIPSpro 7.3.0</simpara></listitem>
<listitem><simpara>Intel C++ 5.0, 6.0</simpara></listitem>
<listitem><simpara>Compaq's cxx 6.2</simpara></listitem>
<listitem><simpara>Microsoft Visual C++ 7.1 and later versions</simpara></listitem>
<listitem><simpara>Microsoft Visual C++ 7.1</simpara></listitem>
</itemizedlist>
</entry>
<entry>

View File

@ -23,8 +23,8 @@
// in anything that may be included by function_template.hpp doesn't break
#include <boost/function/detail/prologue.hpp>
// Older Visual Age C++ version do not handle the file iteration well
#if BOOST_WORKAROUND(__IBMCPP__, >= 500) && BOOST_WORKAROUND(__IBMCPP__, < 800)
// Visual Age C++ doesn't handle the file iteration well
#if BOOST_WORKAROUND(__IBMCPP__, >= 500)
# if BOOST_FUNCTION_MAX_ARGS >= 0
# include <boost/function/function0.hpp>
# endif

View File

@ -11,7 +11,7 @@
#define BOOST_FUNCTION_PROLOGUE_HPP
# include <cassert>
# include <algorithm>
# include <boost/config/no_tr1/functional.hpp> // unary_function, binary_function
# include <functional> // unary_function, binary_function
# include <boost/throw_exception.hpp>
# include <boost/config.hpp>
# include <boost/function/function_base.hpp>
@ -22,5 +22,4 @@
# include <boost/preprocessor/cat.hpp>
# include <boost/preprocessor/repeat.hpp>
# include <boost/preprocessor/inc.hpp>
# include <boost/type_traits/is_void.hpp>
#endif // BOOST_FUNCTION_PROLOGUE_HPP

View File

@ -1,9 +1,8 @@
// Boost.Function library
// Copyright Douglas Gregor 2001-2006
// Copyright Emil Dotchevski 2007
// Use, modification and distribution is subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// Copyright Douglas Gregor 2001-2006. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
@ -15,17 +14,11 @@
#include <string>
#include <memory>
#include <new>
#include <typeinfo>
#include <boost/config.hpp>
#include <boost/detail/sp_typeinfo.hpp>
#include <boost/assert.hpp>
#include <boost/integer.hpp>
#include <boost/type_traits/has_trivial_copy.hpp>
#include <boost/type_traits/has_trivial_destructor.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_volatile.hpp>
#include <boost/type_traits/composite_traits.hpp>
#include <boost/type_traits/ice.hpp>
#include <boost/ref.hpp>
#include <boost/mpl/if.hpp>
#include <boost/detail/workaround.hpp>
@ -36,16 +29,14 @@
# include "boost/mpl/bool.hpp"
#endif
#include <boost/function_equal.hpp>
#include <boost/function/function_fwd.hpp>
#if defined(BOOST_MSVC)
# pragma warning( push )
# pragma warning( disable : 4793 ) // complaint about native code generation
# pragma warning( disable : 4127 ) // "conditional expression is constant"
#endif
// Define BOOST_FUNCTION_STD_NS to the namespace that contains type_info.
#ifdef BOOST_NO_STD_TYPEINFO
#ifdef BOOST_NO_EXCEPTION_STD_NAMESPACE
// Embedded VC++ does not have type_info in namespace std
# define BOOST_FUNCTION_STD_NS
#else
@ -54,9 +45,7 @@
// Borrowed from Boost.Python library: determines the cases where we
// need to use std::type_info::name to compare instead of operator==.
#if defined( BOOST_NO_TYPEID )
# define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) ((X)==(Y))
#elif (defined(__GNUC__) && __GNUC__ >= 3) \
# if (defined(__GNUC__) && __GNUC__ >= 3) \
|| defined(_AIX) \
|| ( defined(__sgi) && defined(__host_mips))
# include <cstring>
@ -72,7 +61,22 @@
# define BOOST_FUNCTION_TARGET_FIX(x)
#endif // not MSVC
#if !BOOST_WORKAROUND(__BORLANDC__, < 0x5A0)
#if defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730 && !defined(BOOST_STRICT_CONFIG)
// Work around a compiler bug.
// boost::python::objects::function has to be seen by the compiler before the
// boost::function class template.
namespace boost { namespace python { namespace objects {
class function;
}}}
#endif
#if defined (BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
|| defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG) \
|| !(defined(BOOST_STRICT_CONFIG) || !defined(__SUNPRO_CC) || __SUNPRO_CC > 0x540)
# define BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX
#endif
#if !BOOST_WORKAROUND(__BORLANDC__, < 0x600)
# define BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor,Type) \
typename ::boost::enable_if_c<(::boost::type_traits::ice_not< \
(::boost::is_integral<Functor>::value)>::value), \
@ -86,6 +90,31 @@
Type>::type
#endif
#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
namespace boost {
#if defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730 && !defined(BOOST_STRICT_CONFIG)
// The library shipping with MIPSpro 7.3.1.3m has a broken allocator<void>
class function_base;
template<typename Signature,
typename Allocator = std::allocator<function_base> >
class function;
#else
template<typename Signature, typename Allocator = std::allocator<void> >
class function;
#endif
template<typename Signature, typename Allocator>
inline void swap(function<Signature, Allocator>& f1,
function<Signature, Allocator>& f2)
{
f1.swap(f2);
}
} // end namespace boost
#endif // have partial specialization
namespace boost {
namespace detail {
namespace function {
@ -100,18 +129,11 @@ namespace boost {
union function_buffer
{
// For pointers to function objects
mutable void* obj_ptr;
void* obj_ptr;
// For pointers to std::type_info objects
struct type_t {
// (get_functor_type_tag, check_functor_type_tag).
const detail::sp_typeinfo* type;
// Whether the type is const-qualified.
bool const_qualified;
// Whether the type is volatile-qualified.
bool volatile_qualified;
} type;
// (get_functor_type_tag, check_functor_type_tag).
const void* const_obj_ptr;
// For function pointers of all kinds
mutable void (*func_ptr)();
@ -122,14 +144,6 @@ namespace boost {
void* obj_ptr;
} bound_memfunc_ptr;
// For references to function objects. We explicitly keep
// track of the cv-qualifiers on the object referenced.
struct obj_ref_t {
mutable void* obj_ptr;
bool is_const_qualified;
bool is_volatile_qualified;
} obj_ref;
// To relax aliasing constraints
mutable char data;
};
@ -161,7 +175,6 @@ namespace boost {
// The operation type to perform on the given functor/function pointer
enum functor_manager_operation_type {
clone_functor_tag,
move_functor_tag,
destroy_functor_tag,
check_functor_type_tag,
get_functor_type_tag
@ -203,40 +216,29 @@ namespace boost {
{
switch (op) {
case clone_functor_tag:
out_buffer.obj_ref = in_buffer.obj_ref;
return;
case move_functor_tag:
out_buffer.obj_ref = in_buffer.obj_ref;
in_buffer.obj_ref.obj_ptr = 0;
out_buffer.obj_ptr = in_buffer.obj_ptr;
return;
case destroy_functor_tag:
out_buffer.obj_ref.obj_ptr = 0;
out_buffer.obj_ptr = 0;
return;
case check_functor_type_tag:
{
const detail::sp_typeinfo& check_type
= *out_buffer.type.type;
// Check whether we have the same type. We can add
// cv-qualifiers, but we can't take them away.
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, BOOST_SP_TYPEID(F))
&& (!in_buffer.obj_ref.is_const_qualified
|| out_buffer.type.const_qualified)
&& (!in_buffer.obj_ref.is_volatile_qualified
|| out_buffer.type.volatile_qualified))
out_buffer.obj_ptr = in_buffer.obj_ref.obj_ptr;
// DPG TBD: Since we're only storing a pointer, it's
// possible that the user could ask for a base class or
// derived class. Is that okay?
const BOOST_FUNCTION_STD_NS::type_info& check_type =
*static_cast<const BOOST_FUNCTION_STD_NS::type_info*>(out_buffer.const_obj_ptr);
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(F)))
out_buffer.obj_ptr = in_buffer.obj_ptr;
else
out_buffer.obj_ptr = 0;
}
return;
case get_functor_type_tag:
out_buffer.type.type = &BOOST_SP_TYPEID(F);
out_buffer.type.const_qualified = in_buffer.obj_ref.is_const_qualified;
out_buffer.type.volatile_qualified = in_buffer.obj_ref.is_volatile_qualified;
out_buffer.const_obj_ptr = &typeid(F);
return;
}
}
@ -256,104 +258,33 @@ namespace boost {
% alignment_of<F>::value == 0))));
};
template <typename F,typename A>
struct functor_wrapper: public F, public A
{
functor_wrapper( F f, A a ):
F(f),
A(a)
{
}
functor_wrapper(const functor_wrapper& f) :
F(static_cast<const F&>(f)),
A(static_cast<const A&>(f))
{
}
};
/**
* The functor_manager class contains a static function "manage" which
* can clone or destroy the given function/function object pointer.
*/
template<typename Functor>
struct functor_manager_common
{
typedef Functor functor_type;
// Function pointers
static inline void
manage_ptr(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op)
{
if (op == clone_functor_tag)
out_buffer.func_ptr = in_buffer.func_ptr;
else if (op == move_functor_tag) {
out_buffer.func_ptr = in_buffer.func_ptr;
in_buffer.func_ptr = 0;
} else if (op == destroy_functor_tag)
out_buffer.func_ptr = 0;
else if (op == check_functor_type_tag) {
const detail::sp_typeinfo& check_type
= *out_buffer.type.type;
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, BOOST_SP_TYPEID(Functor)))
out_buffer.obj_ptr = &in_buffer.func_ptr;
else
out_buffer.obj_ptr = 0;
} else /* op == get_functor_type_tag */ {
out_buffer.type.type = &BOOST_SP_TYPEID(Functor);
out_buffer.type.const_qualified = false;
out_buffer.type.volatile_qualified = false;
}
}
// Function objects that fit in the small-object buffer.
static inline void
manage_small(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op)
{
if (op == clone_functor_tag || op == move_functor_tag) {
const functor_type* in_functor =
reinterpret_cast<const functor_type*>(&in_buffer.data);
new (reinterpret_cast<void*>(&out_buffer.data)) functor_type(*in_functor);
if (op == move_functor_tag) {
functor_type* f = reinterpret_cast<functor_type*>(&in_buffer.data);
(void)f; // suppress warning about the value of f not being used (MSVC)
f->~Functor();
}
} else if (op == destroy_functor_tag) {
// Some compilers (Borland, vc6, ...) are unhappy with ~functor_type.
functor_type* f = reinterpret_cast<functor_type*>(&out_buffer.data);
(void)f; // suppress warning about the value of f not being used (MSVC)
f->~Functor();
} else if (op == check_functor_type_tag) {
const detail::sp_typeinfo& check_type
= *out_buffer.type.type;
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, BOOST_SP_TYPEID(Functor)))
out_buffer.obj_ptr = &in_buffer.data;
else
out_buffer.obj_ptr = 0;
} else /* op == get_functor_type_tag */ {
out_buffer.type.type = &BOOST_SP_TYPEID(Functor);
out_buffer.type.const_qualified = false;
out_buffer.type.volatile_qualified = false;
}
}
};
template<typename Functor>
template<typename Functor, typename Allocator>
struct functor_manager
{
private:
typedef Functor functor_type;
// Function pointers
// For function pointers, the manager is trivial
static inline void
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, function_ptr_tag)
{
functor_manager_common<Functor>::manage_ptr(in_buffer,out_buffer,op);
if (op == clone_functor_tag)
out_buffer.func_ptr = in_buffer.func_ptr;
else if (op == destroy_functor_tag)
out_buffer.func_ptr = 0;
else /* op == check_functor_type_tag */ {
const BOOST_FUNCTION_STD_NS::type_info& check_type =
*static_cast<const BOOST_FUNCTION_STD_NS::type_info*>(out_buffer.const_obj_ptr);
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor)))
out_buffer.obj_ptr = &in_buffer.func_ptr;
else
out_buffer.obj_ptr = 0;
}
}
// Function objects that fit in the small-object buffer.
@ -361,7 +292,21 @@ namespace boost {
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, mpl::true_)
{
functor_manager_common<Functor>::manage_small(in_buffer,out_buffer,op);
if (op == clone_functor_tag) {
const functor_type* in_functor =
reinterpret_cast<const functor_type*>(&in_buffer.data);
new ((void*)&out_buffer.data) functor_type(*in_functor);
} else if (op == destroy_functor_tag) {
// Some compilers (Borland, vc6, ...) are unhappy with ~functor_type.
reinterpret_cast<functor_type*>(&out_buffer.data)->~Functor();
} else /* op == check_functor_type_tag */ {
const BOOST_FUNCTION_STD_NS::type_info& check_type =
*static_cast<const BOOST_FUNCTION_STD_NS::type_info*>(out_buffer.const_obj_ptr);
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor)))
out_buffer.obj_ptr = &in_buffer.data;
else
out_buffer.obj_ptr = 0;
}
}
// Function objects that require heap allocation
@ -369,36 +314,59 @@ namespace boost {
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, mpl::false_)
{
#ifndef BOOST_NO_STD_ALLOCATOR
typedef typename Allocator::template rebind<functor_type>::other
allocator_type;
typedef typename allocator_type::pointer pointer_type;
#else
typedef functor_type* pointer_type;
#endif // BOOST_NO_STD_ALLOCATOR
# ifndef BOOST_NO_STD_ALLOCATOR
allocator_type allocator;
# endif // BOOST_NO_STD_ALLOCATOR
if (op == clone_functor_tag) {
// Clone the functor
// GCC 2.95.3 gets the CV qualifiers wrong here, so we
// can't do the static_cast that we should do.
// jewillco: Changing this to static_cast because GCC 2.95.3 is
// obsolete.
const functor_type* f =
static_cast<const functor_type*>(in_buffer.obj_ptr);
(const functor_type*)(in_buffer.obj_ptr);
// Clone the functor
# ifndef BOOST_NO_STD_ALLOCATOR
pointer_type copy = allocator.allocate(1);
allocator.construct(copy, *f);
// Get back to the original pointer type
functor_type* new_f = static_cast<functor_type*>(copy);
# else
functor_type* new_f = new functor_type(*f);
# endif // BOOST_NO_STD_ALLOCATOR
out_buffer.obj_ptr = new_f;
} else if (op == move_functor_tag) {
out_buffer.obj_ptr = in_buffer.obj_ptr;
in_buffer.obj_ptr = 0;
} else if (op == destroy_functor_tag) {
/* Cast from the void pointer to the functor pointer type */
functor_type* f =
static_cast<functor_type*>(out_buffer.obj_ptr);
# ifndef BOOST_NO_STD_ALLOCATOR
/* Cast from the functor pointer type to the allocator's pointer
type */
pointer_type victim = static_cast<pointer_type>(f);
// Destroy and deallocate the functor
allocator.destroy(victim);
allocator.deallocate(victim, 1);
# else
delete f;
# endif // BOOST_NO_STD_ALLOCATOR
out_buffer.obj_ptr = 0;
} else if (op == check_functor_type_tag) {
const detail::sp_typeinfo& check_type
= *out_buffer.type.type;
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, BOOST_SP_TYPEID(Functor)))
} else /* op == check_functor_type_tag */ {
const BOOST_FUNCTION_STD_NS::type_info& check_type =
*static_cast<const BOOST_FUNCTION_STD_NS::type_info*>(out_buffer.const_obj_ptr);
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor)))
out_buffer.obj_ptr = in_buffer.obj_ptr;
else
out_buffer.obj_ptr = 0;
} else /* op == get_functor_type_tag */ {
out_buffer.type.type = &BOOST_SP_TYPEID(Functor);
out_buffer.type.const_qualified = false;
out_buffer.type.volatile_qualified = false;
}
}
@ -413,7 +381,8 @@ namespace boost {
mpl::bool_<(function_allows_small_object_optimization<functor_type>::value)>());
}
// For member pointers, we use the small-object optimization buffer.
// For member pointers, we treat them as function objects with
// the small-object optimization always enabled.
static inline void
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, member_ptr_tag)
@ -431,112 +400,7 @@ namespace boost {
typedef typename get_function_tag<functor_type>::type tag_type;
switch (op) {
case get_functor_type_tag:
out_buffer.type.type = &BOOST_SP_TYPEID(functor_type);
out_buffer.type.const_qualified = false;
out_buffer.type.volatile_qualified = false;
return;
default:
manager(in_buffer, out_buffer, op, tag_type());
return;
}
}
};
template<typename Functor, typename Allocator>
struct functor_manager_a
{
private:
typedef Functor functor_type;
// Function pointers
static inline void
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, function_ptr_tag)
{
functor_manager_common<Functor>::manage_ptr(in_buffer,out_buffer,op);
}
// Function objects that fit in the small-object buffer.
static inline void
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, mpl::true_)
{
functor_manager_common<Functor>::manage_small(in_buffer,out_buffer,op);
}
// Function objects that require heap allocation
static inline void
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, mpl::false_)
{
typedef functor_wrapper<Functor,Allocator> functor_wrapper_type;
typedef typename Allocator::template rebind<functor_wrapper_type>::other
wrapper_allocator_type;
typedef typename wrapper_allocator_type::pointer wrapper_allocator_pointer_type;
if (op == clone_functor_tag) {
// Clone the functor
// GCC 2.95.3 gets the CV qualifiers wrong here, so we
// can't do the static_cast that we should do.
const functor_wrapper_type* f =
static_cast<const functor_wrapper_type*>(in_buffer.obj_ptr);
wrapper_allocator_type wrapper_allocator(static_cast<Allocator const &>(*f));
wrapper_allocator_pointer_type copy = wrapper_allocator.allocate(1);
wrapper_allocator.construct(copy, *f);
// Get back to the original pointer type
functor_wrapper_type* new_f = static_cast<functor_wrapper_type*>(copy);
out_buffer.obj_ptr = new_f;
} else if (op == move_functor_tag) {
out_buffer.obj_ptr = in_buffer.obj_ptr;
in_buffer.obj_ptr = 0;
} else if (op == destroy_functor_tag) {
/* Cast from the void pointer to the functor_wrapper_type */
functor_wrapper_type* victim =
static_cast<functor_wrapper_type*>(in_buffer.obj_ptr);
wrapper_allocator_type wrapper_allocator(static_cast<Allocator const &>(*victim));
wrapper_allocator.destroy(victim);
wrapper_allocator.deallocate(victim,1);
out_buffer.obj_ptr = 0;
} else if (op == check_functor_type_tag) {
const detail::sp_typeinfo& check_type
= *out_buffer.type.type;
if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, BOOST_SP_TYPEID(Functor)))
out_buffer.obj_ptr = in_buffer.obj_ptr;
else
out_buffer.obj_ptr = 0;
} else /* op == get_functor_type_tag */ {
out_buffer.type.type = &BOOST_SP_TYPEID(Functor);
out_buffer.type.const_qualified = false;
out_buffer.type.volatile_qualified = false;
}
}
// For function objects, we determine whether the function
// object can use the small-object optimization buffer or
// whether we need to allocate it on the heap.
static inline void
manager(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op, function_obj_tag)
{
manager(in_buffer, out_buffer, op,
mpl::bool_<(function_allows_small_object_optimization<functor_type>::value)>());
}
public:
/* Dispatch to an appropriate manager based on whether we have a
function pointer or a function object pointer. */
static inline void
manage(const function_buffer& in_buffer, function_buffer& out_buffer,
functor_manager_operation_type op)
{
typedef typename get_function_tag<functor_type>::type tag_type;
switch (op) {
case get_functor_type_tag:
out_buffer.type.type = &BOOST_SP_TYPEID(functor_type);
out_buffer.type.const_qualified = false;
out_buffer.type.volatile_qualified = false;
out_buffer.const_obj_ptr = &typeid(functor_type);
return;
default:
@ -635,15 +499,15 @@ public:
/** Determine if the function is empty (i.e., has no target). */
bool empty() const { return !vtable; }
/** Retrieve the type of the stored function object, or BOOST_SP_TYPEID(void)
/** Retrieve the type of the stored function object, or typeid(void)
if this is empty. */
const detail::sp_typeinfo& target_type() const
const BOOST_FUNCTION_STD_NS::type_info& target_type() const
{
if (!vtable) return BOOST_SP_TYPEID(void);
if (!vtable) return typeid(void);
detail::function::function_buffer type;
get_vtable()->manager(functor, type, detail::function::get_functor_type_tag);
return *type.type.type;
vtable->manager(functor, type, detail::function::get_functor_type_tag);
return *static_cast<const BOOST_FUNCTION_STD_NS::type_info*>(type.const_obj_ptr);
}
template<typename Functor>
@ -652,10 +516,8 @@ public:
if (!vtable) return 0;
detail::function::function_buffer type_result;
type_result.type.type = &BOOST_SP_TYPEID(Functor);
type_result.type.const_qualified = is_const<Functor>::value;
type_result.type.volatile_qualified = is_volatile<Functor>::value;
get_vtable()->manager(functor, type_result,
type_result.const_obj_ptr = &typeid(Functor);
vtable->manager(functor, type_result,
detail::function::check_functor_type_tag);
return static_cast<Functor*>(type_result.obj_ptr);
}
@ -670,14 +532,12 @@ public:
if (!vtable) return 0;
detail::function::function_buffer type_result;
type_result.type.type = &BOOST_SP_TYPEID(Functor);
type_result.type.const_qualified = true;
type_result.type.volatile_qualified = is_volatile<Functor>::value;
get_vtable()->manager(functor, type_result,
type_result.const_obj_ptr = &typeid(Functor);
vtable->manager(functor, type_result,
detail::function::check_functor_type_tag);
// GCC 2.95.3 gets the CV qualifiers wrong here, so we
// can't do the static_cast that we should do.
return static_cast<const Functor*>(type_result.obj_ptr);
return (const Functor*)(type_result.obj_ptr);
}
template<typename F>
@ -719,16 +579,7 @@ public:
#endif
public: // should be protected, but GCC 2.95.3 will fail to allow access
detail::function::vtable_base* get_vtable() const {
return reinterpret_cast<detail::function::vtable_base*>(
reinterpret_cast<std::size_t>(vtable) & ~static_cast<std::size_t>(0x01));
}
bool has_trivial_copy_and_destroy() const {
return reinterpret_cast<std::size_t>(vtable) & 0x01;
}
detail::function::vtable_base* vtable;
const detail::function::vtable_base* vtable;
mutable detail::function::function_buffer functor;
};

View File

@ -1,70 +0,0 @@
// Boost.Function library
// Copyright (C) Douglas Gregor 2008
//
// Use, modification and distribution is subject to the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// For more information, see http://www.boost.org
#ifndef BOOST_FUNCTION_FWD_HPP
#define BOOST_FUNCTION_FWD_HPP
#include <boost/config.hpp>
#if defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730 && !defined(BOOST_STRICT_CONFIG)
// Work around a compiler bug.
// boost::python::objects::function has to be seen by the compiler before the
// boost::function class template.
namespace boost { namespace python { namespace objects {
class function;
}}}
#endif
#if defined (BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
|| defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG) \
|| !(defined(BOOST_STRICT_CONFIG) || !defined(__SUNPRO_CC) || __SUNPRO_CC > 0x540)
# define BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX
#endif
namespace boost {
class bad_function_call;
#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
// Preferred syntax
template<typename Signature> class function;
template<typename Signature>
inline void swap(function<Signature>& f1, function<Signature>& f2)
{
f1.swap(f2);
}
#endif // have partial specialization
// Portable syntax
template<typename R> class function0;
template<typename R, typename T1> class function1;
template<typename R, typename T1, typename T2> class function2;
template<typename R, typename T1, typename T2, typename T3> class function3;
template<typename R, typename T1, typename T2, typename T3, typename T4>
class function4;
template<typename R, typename T1, typename T2, typename T3, typename T4,
typename T5>
class function5;
template<typename R, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6>
class function6;
template<typename R, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7>
class function7;
template<typename R, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8>
class function8;
template<typename R, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9>
class function9;
template<typename R, typename T1, typename T2, typename T3, typename T4,
typename T5, typename T6, typename T7, typename T8, typename T9,
typename T10>
class function10;
}
#endif

View File

@ -1,9 +1,8 @@
// Boost.Function library
// Copyright Douglas Gregor 2001-2006
// Copyright Emil Dotchevski 2007
// Use, modification and distribution is subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// Copyright Douglas Gregor 2001-2006. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
@ -11,12 +10,6 @@
// Note: this header is a header template and must NOT have multiple-inclusion
// protection.
#include <boost/function/detail/prologue.hpp>
#include <boost/detail/no_exceptions_support.hpp>
#if defined(BOOST_MSVC)
# pragma warning( push )
# pragma warning( disable : 4127 ) // "conditional expression is constant"
#endif
#define BOOST_FUNCTION_TEMPLATE_PARMS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, typename T)
@ -33,6 +26,13 @@
#define BOOST_FUNCTION_ARG_TYPES BOOST_PP_REPEAT(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_ARG_TYPE,BOOST_PP_EMPTY)
// Type of the default allocator
#ifndef BOOST_NO_STD_ALLOCATOR
# define BOOST_FUNCTION_DEFAULT_ALLOCATOR std::allocator<function_base>
#else
# define BOOST_FUNCTION_DEFAULT_ALLOCATOR int
#endif // BOOST_NO_STD_ALLOCATOR
// Comma if nonzero number of arguments
#if BOOST_FUNCTION_NUM_ARGS == 0
# define BOOST_FUNCTION_COMMA
@ -55,9 +55,9 @@
#define BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER \
BOOST_JOIN(void_function_ref_invoker,BOOST_FUNCTION_NUM_ARGS)
#define BOOST_FUNCTION_MEMBER_INVOKER \
BOOST_JOIN(function_mem_invoker,BOOST_FUNCTION_NUM_ARGS)
BOOST_JOIN(member_invoker,BOOST_FUNCTION_NUM_ARGS)
#define BOOST_FUNCTION_VOID_MEMBER_INVOKER \
BOOST_JOIN(function_void_mem_invoker,BOOST_FUNCTION_NUM_ARGS)
BOOST_JOIN(void_member_invoker,BOOST_FUNCTION_NUM_ARGS)
#define BOOST_FUNCTION_GET_FUNCTION_INVOKER \
BOOST_JOIN(get_function_invoker,BOOST_FUNCTION_NUM_ARGS)
#define BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER \
@ -331,7 +331,8 @@ namespace boost {
struct BOOST_FUNCTION_GET_INVOKER<function_ptr_tag>
{
template<typename FunctionPtr,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply
{
typedef typename BOOST_FUNCTION_GET_FUNCTION_INVOKER<
@ -341,22 +342,7 @@ namespace boost {
>::type
invoker_type;
typedef functor_manager<FunctionPtr> manager_type;
};
template<typename FunctionPtr,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply_a
{
typedef typename BOOST_FUNCTION_GET_FUNCTION_INVOKER<
FunctionPtr,
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS
>::type
invoker_type;
typedef functor_manager<FunctionPtr> manager_type;
typedef functor_manager<FunctionPtr, Allocator> manager_type;
};
};
@ -366,7 +352,8 @@ namespace boost {
struct BOOST_FUNCTION_GET_INVOKER<member_ptr_tag>
{
template<typename MemberPtr,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply
{
typedef typename BOOST_FUNCTION_GET_MEMBER_INVOKER<
@ -376,22 +363,7 @@ namespace boost {
>::type
invoker_type;
typedef functor_manager<MemberPtr> manager_type;
};
template<typename MemberPtr,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply_a
{
typedef typename BOOST_FUNCTION_GET_MEMBER_INVOKER<
MemberPtr,
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS
>::type
invoker_type;
typedef functor_manager<MemberPtr> manager_type;
typedef functor_manager<MemberPtr, Allocator> manager_type;
};
};
#endif
@ -401,7 +373,8 @@ namespace boost {
struct BOOST_FUNCTION_GET_INVOKER<function_obj_tag>
{
template<typename FunctionObj,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply
{
typedef typename BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
@ -411,22 +384,7 @@ namespace boost {
>::type
invoker_type;
typedef functor_manager<FunctionObj> manager_type;
};
template<typename FunctionObj,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply_a
{
typedef typename BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
FunctionObj,
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS
>::type
invoker_type;
typedef functor_manager_a<FunctionObj, Allocator> manager_type;
typedef functor_manager<FunctionObj, Allocator> manager_type;
};
};
@ -434,24 +392,10 @@ namespace boost {
template<>
struct BOOST_FUNCTION_GET_INVOKER<function_obj_ref_tag>
{
template<typename RefWrapper,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
struct apply
{
typedef typename BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER<
typename RefWrapper::type,
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS
>::type
invoker_type;
typedef reference_manager<typename RefWrapper::type> manager_type;
};
template<typename RefWrapper,
typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct apply_a
struct apply
{
typedef typename BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER<
typename RefWrapper::type,
@ -464,15 +408,11 @@ namespace boost {
};
};
/**
* vtable for a specific boost::function instance. This
* structure must be an aggregate so that we can use static
* initialization in boost::function's assign_to and assign_to_a
* members. It therefore cannot have any constructors,
* destructors, base classes, etc.
* vtable for a specific boost::function instance.
*/
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
struct BOOST_FUNCTION_VTABLE
{
#ifndef BOOST_NO_VOID_RETURNS
@ -486,70 +426,47 @@ namespace boost {
BOOST_FUNCTION_TEMPLATE_ARGS);
template<typename F>
bool assign_to(F f, function_buffer& functor)
bool assign_to(const F& f, function_buffer& functor) const
{
typedef typename get_function_tag<F>::type tag;
return assign_to(f, functor, tag());
}
template<typename F,typename Allocator>
bool assign_to_a(F f, function_buffer& functor, Allocator a)
{
typedef typename get_function_tag<F>::type tag;
return assign_to_a(f, functor, a, tag());
}
void clear(function_buffer& functor)
void clear(function_buffer& functor) const
{
if (base.manager)
base.manager(functor, functor, destroy_functor_tag);
}
#ifndef BOOST_NO_PRIVATE_IN_AGGREGATE
private:
#endif
// Function pointers
template<typename FunctionPtr>
bool
assign_to(FunctionPtr f, function_buffer& functor, function_ptr_tag)
assign_to(FunctionPtr f, function_buffer& functor,
function_ptr_tag) const
{
this->clear(functor);
if (f) {
// should be a reinterpret cast, but some compilers insist
// on giving cv-qualifiers to free functions
functor.func_ptr = reinterpret_cast<void (*)()>(f);
functor.func_ptr = (void (*)())(f);
return true;
} else {
return false;
}
}
template<typename FunctionPtr,typename Allocator>
bool
assign_to_a(FunctionPtr f, function_buffer& functor, Allocator, function_ptr_tag)
{
return assign_to(f,functor,function_ptr_tag());
}
// Member pointers
#if BOOST_FUNCTION_NUM_ARGS > 0
template<typename MemberPtr>
bool assign_to(MemberPtr f, function_buffer& functor, member_ptr_tag)
bool
assign_to(MemberPtr f, function_buffer& functor, member_ptr_tag) const
{
// DPG TBD: Add explicit support for member function
// objects, so we invoke through mem_fn() but we retain the
// right target_type() values.
if (f) {
this->assign_to(boost::mem_fn(f), functor);
return true;
} else {
return false;
}
}
template<typename MemberPtr,typename Allocator>
bool assign_to_a(MemberPtr f, function_buffer& functor, Allocator a, member_ptr_tag)
{
// DPG TBD: Add explicit support for member function
// objects, so we invoke through mem_fn() but we retain the
// right target_type() values.
if (f) {
this->assign_to_a(boost::mem_fn(f), functor, a);
// Always use the small-object optimization for member
// pointers.
assign_functor(f, functor, mpl::true_());
return true;
} else {
return false;
@ -561,42 +478,38 @@ namespace boost {
// Assign to a function object using the small object optimization
template<typename FunctionObj>
void
assign_functor(FunctionObj f, function_buffer& functor, mpl::true_)
assign_functor(const FunctionObj& f, function_buffer& functor,
mpl::true_) const
{
new (reinterpret_cast<void*>(&functor.data)) FunctionObj(f);
}
template<typename FunctionObj,typename Allocator>
void
assign_functor_a(FunctionObj f, function_buffer& functor, Allocator, mpl::true_)
{
assign_functor(f,functor,mpl::true_());
new ((void*)&functor.data) FunctionObj(f);
}
// Assign to a function object allocated on the heap.
template<typename FunctionObj>
void
assign_functor(FunctionObj f, function_buffer& functor, mpl::false_)
assign_functor(const FunctionObj& f, function_buffer& functor,
mpl::false_) const
{
#ifndef BOOST_NO_STD_ALLOCATOR
typedef typename Allocator::template rebind<FunctionObj>::other
allocator_type;
typedef typename allocator_type::pointer pointer_type;
allocator_type allocator;
pointer_type copy = allocator.allocate(1);
allocator.construct(copy, f);
// Get back to the original pointer type
functor.obj_ptr = static_cast<FunctionObj*>(copy);
# else
functor.obj_ptr = new FunctionObj(f);
}
template<typename FunctionObj,typename Allocator>
void
assign_functor_a(FunctionObj f, function_buffer& functor, Allocator a, mpl::false_)
{
typedef functor_wrapper<FunctionObj,Allocator> functor_wrapper_type;
typedef typename Allocator::template rebind<functor_wrapper_type>::other
wrapper_allocator_type;
typedef typename wrapper_allocator_type::pointer wrapper_allocator_pointer_type;
wrapper_allocator_type wrapper_allocator(a);
wrapper_allocator_pointer_type copy = wrapper_allocator.allocate(1);
wrapper_allocator.construct(copy, functor_wrapper_type(f,a));
functor_wrapper_type* new_f = static_cast<functor_wrapper_type*>(copy);
functor.obj_ptr = new_f;
# endif // BOOST_NO_STD_ALLOCATOR
}
template<typename FunctionObj>
bool
assign_to(FunctionObj f, function_buffer& functor, function_obj_tag)
assign_to(const FunctionObj& f, function_buffer& functor,
function_obj_tag) const
{
if (!boost::detail::function::has_empty_target(boost::addressof(f))) {
assign_functor(f, functor,
@ -606,36 +519,23 @@ namespace boost {
return false;
}
}
template<typename FunctionObj,typename Allocator>
bool
assign_to_a(FunctionObj f, function_buffer& functor, Allocator a, function_obj_tag)
{
if (!boost::detail::function::has_empty_target(boost::addressof(f))) {
assign_functor_a(f, functor, a,
mpl::bool_<(function_allows_small_object_optimization<FunctionObj>::value)>());
return true;
} else {
return false;
}
}
// Reference to a function object
template<typename FunctionObj>
bool
assign_to(const reference_wrapper<FunctionObj>& f,
function_buffer& functor, function_obj_ref_tag)
function_buffer& functor, function_obj_ref_tag) const
{
functor.obj_ref.obj_ptr = (void *)(f.get_pointer());
functor.obj_ref.is_const_qualified = is_const<FunctionObj>::value;
functor.obj_ref.is_volatile_qualified = is_volatile<FunctionObj>::value;
return true;
}
template<typename FunctionObj,typename Allocator>
bool
assign_to_a(const reference_wrapper<FunctionObj>& f,
function_buffer& functor, Allocator, function_obj_ref_tag)
{
return assign_to(f,functor,function_obj_ref_tag());
if (!boost::detail::function::has_empty_target(f.get_pointer())) {
// DPG TBD: We might need to detect constness of
// FunctionObj to assign into obj_ptr or const_obj_ptr to
// be truly legit, but no platform in existence makes
// const void* different from void*.
functor.const_obj_ptr = f.get_pointer();
return true;
} else {
return false;
}
}
public:
@ -647,7 +547,8 @@ namespace boost {
template<
typename R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_PARMS
BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator = BOOST_FUNCTION_DEFAULT_ALLOCATOR
>
class BOOST_FUNCTION_FUNCTION : public function_base
@ -672,14 +573,9 @@ namespace boost {
private:
typedef boost::detail::function::BOOST_FUNCTION_VTABLE<
R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS>
R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS, Allocator>
vtable_type;
vtable_type* get_vtable() const {
return reinterpret_cast<vtable_type*>(
reinterpret_cast<std::size_t>(vtable) & ~static_cast<size_t>(0x01));
}
struct clear_type {};
public:
@ -702,6 +598,7 @@ namespace boost {
BOOST_STATIC_CONSTANT(int, arity = BOOST_FUNCTION_NUM_ARGS);
BOOST_FUNCTION_ARG_TYPES
typedef Allocator allocator_type;
typedef BOOST_FUNCTION_FUNCTION self_type;
BOOST_FUNCTION_FUNCTION() : function_base() { }
@ -721,19 +618,6 @@ namespace boost {
{
this->assign_to(f);
}
template<typename Functor,typename Allocator>
BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f, Allocator a
#ifndef BOOST_NO_SFINAE
,typename enable_if_c<
(boost::type_traits::ice_not<
(is_integral<Functor>::value)>::value),
int>::type = 0
#endif // BOOST_NO_SFINAE
) :
function_base()
{
this->assign_to_a(f,a);
}
#ifndef BOOST_NO_SFINAE
BOOST_FUNCTION_FUNCTION(clear_type*) : function_base() { }
@ -751,14 +635,20 @@ namespace boost {
~BOOST_FUNCTION_FUNCTION() { clear(); }
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
// MSVC 6.0 and prior require all definitions to be inline, but
// these definitions can become very costly.
result_type operator()(BOOST_FUNCTION_PARMS) const
{
if (this->empty())
boost::throw_exception(bad_function_call());
return get_vtable()->invoker
return reinterpret_cast<const vtable_type*>(vtable)->invoker
(this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS);
}
#else
result_type operator()(BOOST_FUNCTION_PARMS) const;
#endif
// The distinction between when to use BOOST_FUNCTION_FUNCTION and
// when to use self_type is obnoxious. MSVC cannot handle self_type as
@ -777,27 +667,18 @@ namespace boost {
operator=(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
{
this->clear();
BOOST_TRY {
#ifndef BOOST_NO_EXCEPTIONS
try {
this->assign_to(f);
} BOOST_CATCH (...) {
} catch (...) {
vtable = 0;
BOOST_RETHROW;
throw;
}
BOOST_CATCH_END
#else
this->assign_to(f);
#endif
return *this;
}
template<typename Functor,typename Allocator>
void assign(Functor BOOST_FUNCTION_TARGET_FIX(const &) f, Allocator a)
{
this->clear();
BOOST_TRY{
this->assign_to_a(f,a);
} BOOST_CATCH (...) {
vtable = 0;
BOOST_RETHROW;
}
BOOST_CATCH_END
}
#ifndef BOOST_NO_SFINAE
BOOST_FUNCTION_FUNCTION& operator=(clear_type*)
@ -821,13 +702,16 @@ namespace boost {
return *this;
this->clear();
BOOST_TRY {
#ifndef BOOST_NO_EXCEPTIONS
try {
this->assign_to_own(f);
} BOOST_CATCH (...) {
} catch (...) {
vtable = 0;
BOOST_RETHROW;
throw;
}
BOOST_CATCH_END
#else
this->assign_to_own(f);
#endif
return *this;
}
@ -836,18 +720,16 @@ namespace boost {
if (&other == this)
return;
BOOST_FUNCTION_FUNCTION tmp;
tmp.move_assign(*this);
this->move_assign(other);
other.move_assign(tmp);
BOOST_FUNCTION_FUNCTION tmp = *this;
*this = other;
other = tmp;
}
// Clear out a target, if there is one
void clear()
{
if (vtable) {
if (!this->has_trivial_copy_and_destroy())
get_vtable()->clear(this->functor);
reinterpret_cast<const vtable_type*>(vtable)->clear(this->functor);
vtable = 0;
}
}
@ -876,16 +758,13 @@ namespace boost {
{
if (!f.empty()) {
this->vtable = f.vtable;
if (this->has_trivial_copy_and_destroy())
this->functor = f.functor;
else
get_vtable()->base.manager(f.functor, this->functor,
boost::detail::function::clone_functor_tag);
f.vtable->manager(f.functor, this->functor,
boost::detail::function::clone_functor_tag);
}
}
template<typename Functor>
void assign_to(Functor f)
void assign_to(const Functor& f)
{
using detail::function::vtable_base;
@ -893,120 +772,76 @@ namespace boost {
typedef detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker;
typedef typename get_invoker::
template apply<Functor, R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS>
BOOST_FUNCTION_TEMPLATE_ARGS, Allocator>
handler_type;
typedef typename handler_type::invoker_type invoker_type;
typedef typename handler_type::manager_type manager_type;
// Note: it is extremely important that this initialization use
// static initialization. Otherwise, we will have a race
// condition here in multi-threaded code. See
// http://thread.gmane.org/gmane.comp.lib.boost.devel/164902/.
static vtable_type stored_vtable =
{ { &manager_type::manage }, &invoker_type::invoke };
if (stored_vtable.assign_to(f, functor)) {
std::size_t value = reinterpret_cast<std::size_t>(&stored_vtable.base);
if (boost::has_trivial_copy_constructor<Functor>::value &&
boost::has_trivial_destructor<Functor>::value &&
detail::function::function_allows_small_object_optimization<Functor>::value)
value |= static_cast<size_t>(0x01);
vtable = reinterpret_cast<detail::function::vtable_base *>(value);
} else
vtable = 0;
}
template<typename Functor,typename Allocator>
void assign_to_a(Functor f,Allocator a)
{
using detail::function::vtable_base;
typedef typename detail::function::get_function_tag<Functor>::type tag;
typedef detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker;
typedef typename get_invoker::
template apply_a<Functor, R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS,
Allocator>
handler_type;
typedef typename handler_type::invoker_type invoker_type;
typedef typename handler_type::manager_type manager_type;
// Note: it is extremely important that this initialization use
// static initialization. Otherwise, we will have a race
// condition here in multi-threaded code. See
// http://thread.gmane.org/gmane.comp.lib.boost.devel/164902/.
static vtable_type stored_vtable =
static const vtable_type stored_vtable =
{ { &manager_type::manage }, &invoker_type::invoke };
if (stored_vtable.assign_to_a(f, functor, a)) {
std::size_t value = reinterpret_cast<std::size_t>(&stored_vtable.base);
if (boost::has_trivial_copy_constructor<Functor>::value &&
boost::has_trivial_destructor<Functor>::value &&
detail::function::function_allows_small_object_optimization<Functor>::value)
value |= static_cast<std::size_t>(0x01);
vtable = reinterpret_cast<detail::function::vtable_base *>(value);
} else
vtable = 0;
}
// Moves the value from the specified argument to *this. If the argument
// has its function object allocated on the heap, move_assign will pass
// its buffer to *this, and set the argument's buffer pointer to NULL.
void move_assign(BOOST_FUNCTION_FUNCTION& f)
{
if (&f == this)
return;
BOOST_TRY {
if (!f.empty()) {
this->vtable = f.vtable;
if (this->has_trivial_copy_and_destroy())
this->functor = f.functor;
else
get_vtable()->base.manager(f.functor, this->functor,
boost::detail::function::move_functor_tag);
f.vtable = 0;
} else {
clear();
}
} BOOST_CATCH (...) {
vtable = 0;
BOOST_RETHROW;
}
BOOST_CATCH_END
if (stored_vtable.assign_to(f, functor)) vtable = &stored_vtable.base;
else vtable = 0;
}
};
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
typename Allocator>
inline void swap(BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS
BOOST_FUNCTION_TEMPLATE_ARGS ,
Allocator
>& f1,
BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS
BOOST_FUNCTION_TEMPLATE_ARGS,
Allocator
>& f2)
{
f1.swap(f2);
}
#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
typename BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS,
Allocator>::result_type
BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS,
Allocator>
::operator()(BOOST_FUNCTION_PARMS) const
{
if (this->empty())
boost::throw_exception(bad_function_call());
return reinterpret_cast<const vtable_type*>(vtable)->invoker
(this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS);
}
#endif
// Poison comparisons between boost::function objects of the same type.
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
typename Allocator>
void operator==(const BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS>&,
BOOST_FUNCTION_TEMPLATE_ARGS ,
Allocator>&,
const BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS>&);
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
BOOST_FUNCTION_TEMPLATE_ARGS ,
Allocator>&);
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
typename Allocator>
void operator!=(const BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS>&,
BOOST_FUNCTION_TEMPLATE_ARGS ,
Allocator>&,
const BOOST_FUNCTION_FUNCTION<
R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_ARGS>& );
BOOST_FUNCTION_TEMPLATE_ARGS ,
Allocator>&);
#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
@ -1017,16 +852,20 @@ template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS>
#endif
template<typename R BOOST_FUNCTION_COMMA
BOOST_FUNCTION_TEMPLATE_PARMS>
class function<BOOST_FUNCTION_PARTIAL_SPEC>
: public BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS>
BOOST_FUNCTION_TEMPLATE_PARMS,
typename Allocator>
class function<BOOST_FUNCTION_PARTIAL_SPEC, Allocator>
: public BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS
BOOST_FUNCTION_COMMA Allocator>
{
typedef BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS> base_type;
typedef BOOST_FUNCTION_FUNCTION<R, BOOST_FUNCTION_TEMPLATE_ARGS
BOOST_FUNCTION_COMMA Allocator> base_type;
typedef function self_type;
struct clear_type {};
public:
typedef typename base_type::allocator_type allocator_type;
function() : base_type() {}
@ -1042,18 +881,6 @@ public:
base_type(f)
{
}
template<typename Functor,typename Allocator>
function(Functor f, Allocator a
#ifndef BOOST_NO_SFINAE
,typename enable_if_c<
(boost::type_traits::ice_not<
(is_integral<Functor>::value)>::value),
int>::type = 0
#endif
) :
base_type(f,a)
{
}
#ifndef BOOST_NO_SFINAE
function(clear_type*) : base_type() {}
@ -1106,6 +933,8 @@ public:
// Cleanup after ourselves...
#undef BOOST_FUNCTION_VTABLE
#undef BOOST_FUNCTION_GET_INVOKER
#undef BOOST_FUNCTION_DEFAULT_ALLOCATOR
#undef BOOST_FUNCTION_COMMA
#undef BOOST_FUNCTION_FUNCTION
#undef BOOST_FUNCTION_FUNCTION_INVOKER
@ -1119,8 +948,7 @@ public:
#undef BOOST_FUNCTION_GET_FUNCTION_INVOKER
#undef BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER
#undef BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER
#undef BOOST_FUNCTION_GET_MEM_FUNCTION_INVOKER
#undef BOOST_FUNCTION_GET_INVOKER
#undef BOOST_FUNCTION_GET_MEMBER_INVOKER
#undef BOOST_FUNCTION_TEMPLATE_PARMS
#undef BOOST_FUNCTION_TEMPLATE_ARGS
#undef BOOST_FUNCTION_PARMS
@ -1130,7 +958,3 @@ public:
#undef BOOST_FUNCTION_ARG_TYPES
#undef BOOST_FUNCTION_VOID_RETURN_TYPE
#undef BOOST_FUNCTION_RETURN
#if defined(BOOST_MSVC)
# pragma warning( pop )
#endif

View File

@ -1,45 +0,0 @@
// Boost.Function library - Typeof support
// Copyright (C) Douglas Gregor 2008
//
// Use, modification and distribution is subject to the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// For more information, see http://www.boost.org
#ifndef BOOST_FUNCTION_TYPEOF_HPP
#define BOOST_FUNCTION_TYPEOF_HPP
#include <boost/function/function_fwd.hpp>
#include <boost/typeof/typeof.hpp>
#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
BOOST_TYPEOF_REGISTER_TYPE(boost::bad_function_call)
#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function, (typename))
#endif
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function0, (typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function1, (typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function2, (typename)(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function3,
(typename)(typename)(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function4,
(typename)(typename)(typename)(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function5,
(typename)(typename)(typename)(typename)(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function6,
(typename)(typename)(typename)(typename)(typename)(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function7,
(typename)(typename)(typename)(typename)(typename)(typename)(typename)
(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function8,
(typename)(typename)(typename)(typename)(typename)(typename)(typename)
(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function9,
(typename)(typename)(typename)(typename)(typename)(typename)(typename)
(typename)(typename)(typename))
BOOST_TYPEOF_REGISTER_TEMPLATE(boost::function10,
(typename)(typename)(typename)(typename)(typename)(typename)(typename)
(typename)(typename)(typename)(typename))
#endif

View File

@ -1,11 +1,4 @@
<html>
<!--
Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com>
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
-->
<head>
<meta http-equiv="refresh" content="0; URL=../../doc/html/function.html">
</head>

View File

@ -8,7 +8,6 @@
# For more information, see http://www.boost.org/
project
: requirements <toolset>msvc:<asynch-exceptions>on
: source-location $(BOOST_ROOT)
;
@ -59,9 +58,6 @@ import testing ;
[ run libs/function/test/contains2_test.cpp : : : : ]
[ run libs/function/test/nothrow_swap.cpp : : : : ]
[ compile libs/function/test/function_typeof_test.cpp ]
;
}

View File

@ -27,14 +27,6 @@ struct counting_allocator : public std::allocator<T>
typedef counting_allocator<U> other;
};
counting_allocator()
{
}
template<typename U>
counting_allocator( counting_allocator<U> )
{
}
T* allocate(std::size_t n)
{
@ -49,27 +41,20 @@ struct counting_allocator : public std::allocator<T>
}
};
struct enable_small_object_optimization
{
};
struct disable_small_object_optimization
{
int unused_state_data[32];
};
template <typename base>
struct plus_int: base
struct plus_int
{
int operator()(int x, int y) const { return x + y; }
int unused_state_data[32];
};
static int do_minus(int x, int y) { return x-y; }
template <typename base>
struct DoNothing: base
struct DoNothing
{
void operator()() const {}
int unused_state_data[32];
};
static void do_nothing() {}
@ -77,61 +62,33 @@ static void do_nothing() {}
int
test_main(int, char*[])
{
function2<int, int, int> f;
f.assign( plus_int<disable_small_object_optimization>(), counting_allocator<int>() );
function2<int, int, int, counting_allocator<int> > f;
f = plus_int();
f.clear();
BOOST_CHECK(alloc_count == 1);
BOOST_CHECK(dealloc_count == 1);
alloc_count = 0;
dealloc_count = 0;
f.assign( plus_int<enable_small_object_optimization>(), counting_allocator<int>() );
f.clear();
BOOST_CHECK(alloc_count == 0);
BOOST_CHECK(dealloc_count == 0);
f.assign( plus_int<disable_small_object_optimization>(), std::allocator<int>() );
f.clear();
f.assign( plus_int<enable_small_object_optimization>(), std::allocator<int>() );
f.clear();
alloc_count = 0;
dealloc_count = 0;
f.assign( &do_minus, counting_allocator<int>() );
f = &do_minus;
f.clear();
BOOST_CHECK(alloc_count == 0);
BOOST_CHECK(dealloc_count == 0);
f.assign( &do_minus, std::allocator<int>() );
f.clear();
function0<void> fv;
function0<void, counting_allocator<int> > fv;
alloc_count = 0;
dealloc_count = 0;
fv.assign( DoNothing<disable_small_object_optimization>(), counting_allocator<int>() );
fv = DoNothing();
fv.clear();
BOOST_CHECK(alloc_count == 1);
BOOST_CHECK(dealloc_count == 1);
alloc_count = 0;
dealloc_count = 0;
fv.assign( DoNothing<enable_small_object_optimization>(), counting_allocator<int>() );
fv.clear();
BOOST_CHECK(alloc_count == 0);
BOOST_CHECK(dealloc_count == 0);
fv.assign( DoNothing<disable_small_object_optimization>(), std::allocator<int>() );
fv.clear();
fv.assign( DoNothing<enable_small_object_optimization>(), std::allocator<int>() );
fv.clear();
alloc_count = 0;
dealloc_count = 0;
fv.assign( &do_nothing, counting_allocator<int>() );
fv = &do_nothing;
fv.clear();
BOOST_CHECK(alloc_count == 0);
BOOST_CHECK(dealloc_count == 0);
fv.assign( &do_nothing, std::allocator<int>() );
fv.clear();
function0<void> fv2;
fv.assign(&do_nothing, std::allocator<int>() );
fv2.assign(fv, std::allocator<int>() );
return 0;
}

View File

@ -88,15 +88,6 @@ static void target_test()
BOOST_CHECK(!f.target<int (*)()>());
BOOST_CHECK(f.target<Seventeen>());
BOOST_CHECK(f.target<Seventeen>() == &this_seventeen);
const Seventeen const_seventeen = this_seventeen;
f = boost::ref(const_seventeen);
BOOST_CHECK(!f.target<int (*)()>());
BOOST_CHECK(f.target<const Seventeen>());
BOOST_CHECK(f.target<const Seventeen>() == &const_seventeen);
BOOST_CHECK(f.target<const volatile Seventeen>());
BOOST_CHECK(!f.target<Seventeen>());
BOOST_CHECK(!f.target<volatile Seventeen>());
}
static void equal_test()

View File

@ -636,54 +636,6 @@ test_ref()
}
}
static unsigned construction_count = 0;
static unsigned destruction_count = 0;
struct MySmallFunctor {
MySmallFunctor() { ++construction_count; }
MySmallFunctor(const MySmallFunctor &) { ++construction_count; }
~MySmallFunctor() { ++destruction_count; }
int operator()() { return 0; }
};
struct MyLargeFunctor {
MyLargeFunctor() { ++construction_count; }
MyLargeFunctor(const MyLargeFunctor &) { ++construction_count; }
~MyLargeFunctor() { ++destruction_count; }
int operator()() { return 0; }
float data[128];
};
void test_construct_destroy_count()
{
{
boost::function0<int> f;
boost::function0<int> g;
f = MySmallFunctor();
g = MySmallFunctor();
f.swap(g);
}
// MySmallFunctor objects should be constructed as many times as
// they are destroyed.
BOOST_CHECK(construction_count == destruction_count);
construction_count = 0;
destruction_count = 0;
{
boost::function0<int> f;
boost::function0<int> g;
f = MyLargeFunctor();
g = MyLargeFunctor();
f.swap(g);
}
// MyLargeFunctor objects should be constructed as many times as
// they are destroyed.
BOOST_CHECK(construction_count == destruction_count);
}
int test_main(int, char* [])
{
test_zero_args();
@ -692,6 +644,5 @@ int test_main(int, char* [])
test_emptiness();
test_member_functions();
test_ref();
test_construct_destroy_count();
return 0;
}

View File

@ -13,8 +13,8 @@
#include <string>
#include <utility>
using boost::function;
using std::string;
using namespace boost;
using namespace std;
int global_int;
@ -525,7 +525,7 @@ test_zero_args()
static void
test_one_arg()
{
std::negate<int> neg;
negate<int> neg;
function<int (int)> f1(neg);
BOOST_CHECK(f1(5) == -5);
@ -607,12 +607,12 @@ struct add_with_throw_on_copy {
add_with_throw_on_copy(const add_with_throw_on_copy&)
{
throw std::runtime_error("But this CAN'T throw");
throw runtime_error("But this CAN'T throw");
}
add_with_throw_on_copy& operator=(const add_with_throw_on_copy&)
{
throw std::runtime_error("But this CAN'T throw");
throw runtime_error("But this CAN'T throw");
}
};
@ -621,38 +621,14 @@ test_ref()
{
add_with_throw_on_copy atc;
try {
boost::function<int (int, int)> f(boost::ref(atc));
boost::function<int (int, int)> f(ref(atc));
BOOST_CHECK(f(1, 3) == 4);
}
catch(std::runtime_error e) {
catch(runtime_error e) {
BOOST_ERROR("Nonthrowing constructor threw an exception");
}
}
static void dummy() {}
static void test_empty_ref()
{
boost::function<void()> f1;
boost::function<void()> f2(boost::ref(f1));
try {
f2();
BOOST_ERROR("Exception didn't throw for reference to empty function.");
}
catch(std::runtime_error e) {}
f1 = dummy;
try {
f2();
}
catch(std::runtime_error e) {
BOOST_ERROR("Error calling referenced function.");
}
}
static void test_exception()
{
boost::function<int (int, int)> f;
@ -698,7 +674,6 @@ int test_main(int, char* [])
test_emptiness();
test_member_functions();
test_ref();
test_empty_ref();
test_exception();
test_implicit();
test_call();

View File

@ -1,18 +0,0 @@
// Boost.Function library
// Copyright Douglas Gregor 2008. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
#include <boost/function/function_typeof.hpp>
#include <boost/function.hpp>
#include <boost/typeof/typeof.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/static_assert.hpp>
void f(boost::function0<void> f, boost::function0<void> g)
{
BOOST_STATIC_ASSERT((boost::is_same<boost::function0<void>, BOOST_TYPEOF(f = g)>::value));
}

View File

@ -15,21 +15,21 @@
#include <boost/lambda/bind.hpp>
#include <boost/function.hpp>
using namespace std;
using namespace boost;
using namespace boost::lambda;
static unsigned
func_impl(int arg1, bool arg2, double arg3)
{
using namespace std;
return abs (static_cast<int>((arg2 ? arg1 : 2 * arg1) * arg3));
}
int test_main(int, char*[])
{
using boost::function;
using namespace boost::lambda;
function <unsigned(bool, double)> f1 = bind(func_impl, 15, _1, _2);
function <unsigned(double)> f2 = boost::lambda::bind(f1, false, _1);
function <unsigned()> f3 = boost::lambda::bind(f2, 4.0);
function <unsigned(double)> f2 = bind(f1, false, _1);
function <unsigned()> f3 = bind(f2, 4.0);
f3();

View File

@ -1,60 +0,0 @@
// Boost.Function library
// Copyright Douglas Gregor 2008. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
#include <boost/test/minimal.hpp>
#include <boost/function.hpp>
struct tried_to_copy { };
struct MaybeThrowOnCopy {
MaybeThrowOnCopy(int value = 0) : value(value) { }
MaybeThrowOnCopy(const MaybeThrowOnCopy& other) : value(other.value) {
if (throwOnCopy)
throw tried_to_copy();
}
MaybeThrowOnCopy& operator=(const MaybeThrowOnCopy& other) {
if (throwOnCopy)
throw tried_to_copy();
value = other.value;
return *this;
}
int operator()() { return value; }
int value;
// Make sure that this function object doesn't trigger the
// small-object optimization in Function.
float padding[100];
static bool throwOnCopy;
};
bool MaybeThrowOnCopy::throwOnCopy = false;
int test_main(int, char* [])
{
boost::function0<int> f;
boost::function0<int> g;
MaybeThrowOnCopy::throwOnCopy = false;
f = MaybeThrowOnCopy(1);
g = MaybeThrowOnCopy(2);
BOOST_CHECK(f() == 1);
BOOST_CHECK(g() == 2);
MaybeThrowOnCopy::throwOnCopy = true;
f.swap(g);
BOOST_CHECK(f() == 2);
BOOST_CHECK(g() == 1);
return 0;
}