mirror of
https://github.com/boostorg/function.git
synced 2025-07-03 07:46:42 +02:00
Compare commits
23 Commits
boost-1.31
...
svn-branch
| Author | SHA1 | Date | |
|---|---|---|---|
| 955cf95601 | |||
| e4f632e5ca | |||
| 5b4dc38727 | |||
| 22fd23b00f | |||
| d929aaf814 | |||
| ae11f21513 | |||
| dc14c35c38 | |||
| 1b27dc8f86 | |||
| 2c0e633307 | |||
| e80a00545c | |||
| 1a142a2f94 | |||
| f0c5e5e95b | |||
| 2fb242eae1 | |||
| 03c7fdcf37 | |||
| b7608dff24 | |||
| 5f0426a80d | |||
| fdb37c35ff | |||
| b7650282df | |||
| c5d8d03b76 | |||
| 746676d274 | |||
| c31ad8700e | |||
| cb1bcd5410 | |||
| 7d30d98efd |
@ -1,5 +0,0 @@
|
||||
project boost/doc ;
|
||||
import boostbook : boostbook ;
|
||||
|
||||
boostbook function-doc : function.xml ;
|
||||
|
||||
137
doc/faq.xml
137
doc/faq.xml
@ -1,137 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!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="$Date$">
|
||||
<title>Frequently Asked Questions</title>
|
||||
|
||||
<qandaset>
|
||||
<qandaentry>
|
||||
<question><para>Why can't I compare
|
||||
<classname>boost::function</classname> objects with
|
||||
<code>operator==</code> or
|
||||
<code>operator!=</code>?</para></question>
|
||||
|
||||
<answer>
|
||||
<para>Comparison between <classname>boost::function</classname>
|
||||
objects cannot be implemented "well", and therefore will not be
|
||||
implemented. The typical semantics requested for <code>f ==
|
||||
g</code> given <classname>boost::function</classname> objects
|
||||
<code>f</code> and <code>g</code> are:</para>
|
||||
<itemizedlist>
|
||||
<listitem><simpara>If <code>f</code> and <code>g</code>
|
||||
store function objects of the same type, use that type's
|
||||
<code>operator==</code> to compare
|
||||
them.</simpara></listitem>
|
||||
|
||||
<listitem><simpara>If <code>f</code> and <code>g</code>
|
||||
store function objects of different types, return
|
||||
<code>false</code>.</simpara></listitem>
|
||||
</itemizedlist>
|
||||
<para>The problem occurs when the type of the function objects
|
||||
stored by both <code>f</code> and <code>g</code> doesn't have an
|
||||
<code>operator==</code>: we would like the expression <code>f ==
|
||||
g</code> to fail to compile, as occurs with, e.g., the standard
|
||||
containers. However, this is not implementable for
|
||||
<classname>boost::function</classname> because it necessarily
|
||||
"erases" some type information after it has been assigned a
|
||||
function object, so it cannot try to call
|
||||
<code>operator==</code> later: it must either find a way to call
|
||||
<code>operator==</code> now, or it will never be able to call it
|
||||
later. Note, for instance, what happens if you try to put a
|
||||
<code>float</code> value into a
|
||||
<classname>boost::function</classname> object: you will get an
|
||||
error at the assignment operator or constructor, not in
|
||||
<code>operator()</code>, because the function-call expression
|
||||
must be bound in the constructor or assignment operator.</para>
|
||||
|
||||
<para>The most promising approach is to find a method of
|
||||
determining if <code>operator==</code> can be called for a
|
||||
particular type, and then supporting it only when it is
|
||||
available; in other situations, an exception would be
|
||||
thrown. However, to date there is no known way to detect if an
|
||||
arbitrary operator expression <code>f == g</code> is suitably
|
||||
defined. The best solution known has the following undesirable
|
||||
qualities:</para>
|
||||
|
||||
<orderedlist>
|
||||
<listitem><simpara>Fails at compile-time for objects where
|
||||
<code>operator==</code> is not accessible (e.g., because it is
|
||||
<code>private</code>).</simpara></listitem>
|
||||
|
||||
<listitem><simpara>Fails at compile-time if calling
|
||||
<code>operator==</code> is ambiguous.</simpara></listitem>
|
||||
|
||||
<listitem><simpara>Appears to be correct if the
|
||||
<code>operator==</code> declaration is correct, even though
|
||||
<code>operator==</code> may not compile.</simpara></listitem>
|
||||
</orderedlist>
|
||||
|
||||
<para>All of these problems translate into failures in the
|
||||
<classname>boost::function</classname> constructors or
|
||||
assignment operator, <emphasis>even if the user never invokes
|
||||
operator==</emphasis>. We can't do that to users.</para>
|
||||
|
||||
<para>The other option is to place the burden on users that want
|
||||
to use <code>operator==</code>, e.g., by providing an
|
||||
<code>is_equality_comparable</code> trait they may
|
||||
specialize. This is a workable solution, but is dangerous in
|
||||
practice, because forgetting to specialize the trait will result
|
||||
in unexpected exceptions being thrown from
|
||||
<classname>boost::function</classname>'s
|
||||
<code>operator==</code>. This essentially negates the usefulness
|
||||
of <code>operator==</code> in the context in which it is most
|
||||
desired: multitarget callbacks. The
|
||||
<libraryname>Signals</libraryname> library has a way around
|
||||
this.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
<qandaentry>
|
||||
<question><para>I see void pointers; is this [mess] type safe?</para></question>
|
||||
<answer>
|
||||
<para>Yes, <computeroutput>boost::function</computeroutput> is type
|
||||
safe even though it uses void pointers and pointers to functions
|
||||
returning void and taking no arguments. Essentially, all type
|
||||
information is encoded in the functions that manage and invoke
|
||||
function pointers and function objects. Only these functions are
|
||||
instantiated with the exact type that is pointed to by the void
|
||||
pointer or pointer to void function. The reason that both are required
|
||||
is that one may cast between void pointers and object pointers safely
|
||||
or between different types of function pointers (provided you don't
|
||||
invoke a function pointer with the wrong type). </para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
<qandaentry>
|
||||
<question><para>Why are there workarounds for void returns? C++ allows them!</para></question>
|
||||
<answer><para>Void returns are permitted by the C++ standard, as in this code snippet:
|
||||
<programlisting>void f();
|
||||
void g() { return f(); }</programlisting>
|
||||
</para>
|
||||
|
||||
<para> This is a valid usage of <computeroutput>boost::function</computeroutput> because void returns are not used. With void returns, we would attempting to compile ill-formed code similar to:
|
||||
<programlisting>int f();
|
||||
void g() { return f(); }</programlisting>
|
||||
</para>
|
||||
|
||||
<para> In essence, not using void returns allows
|
||||
<computeroutput>boost::function</computeroutput> to swallow a return value. This is
|
||||
consistent with allowing the user to assign and invoke functions and
|
||||
function objects with parameters that don't exactly match.</para>
|
||||
|
||||
</answer>
|
||||
</qandaentry>
|
||||
|
||||
<qandaentry>
|
||||
<question><para>Why (function) cloning?</para></question>
|
||||
<answer>
|
||||
<para>In November and December of 2000, the issue of cloning
|
||||
vs. reference counting was debated at length and it was decided
|
||||
that cloning gave more predictable semantics. I won't rehash the
|
||||
discussion here, but if it cloning is incorrect for a particular
|
||||
application a reference-counting allocator could be used.</para>
|
||||
</answer>
|
||||
</qandaentry>
|
||||
</qandaset>
|
||||
|
||||
</section>
|
||||
@ -1,60 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
|
||||
<library name="Function" dirname="function" id="function"
|
||||
last-revision="$Date$"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<libraryinfo>
|
||||
<author>
|
||||
<firstname>Douglas</firstname>
|
||||
<surname>Gregor</surname>
|
||||
<email>gregod@cs.rpi.edu</email>
|
||||
</author>
|
||||
|
||||
<copyright>
|
||||
<year>2001</year>
|
||||
<year>2002</year>
|
||||
<year>2003</year>
|
||||
<holder>Douglas Gregor</holder>
|
||||
</copyright>
|
||||
|
||||
<legalnotice>
|
||||
<para>Use, modification and distribution is subject to the Boost
|
||||
Software License, Version 1.0. (See accompanying file
|
||||
<filename>LICENSE_1_0.txt</filename> or copy at <ulink
|
||||
url="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</ulink>)</para>
|
||||
</legalnotice>
|
||||
|
||||
<librarypurpose>Function object wrappers for deferred calls or callbacks</librarypurpose>
|
||||
<librarycategory name="category:higher-order"/>
|
||||
</libraryinfo>
|
||||
|
||||
<title>Boost.Function</title>
|
||||
|
||||
<section id="function.intro">
|
||||
<title>Introduction</title>
|
||||
<para>The Boost.Function library contains a family of class templates
|
||||
that are function object wrappers. The notion is similar to a
|
||||
generalized callback. It shares features with function pointers in
|
||||
that both define a call interface (e.g., a function taking two integer
|
||||
arguments and returning a floating-point value) through which some
|
||||
implementation can be called, and the implementation that is invoked
|
||||
may change throughout the course of the program.</para>
|
||||
|
||||
<para> Generally, any place in which a function pointer would be used
|
||||
to defer a call or make a callback, Boost.Function can be used instead
|
||||
to allow the user greater flexibility in the implementation of the
|
||||
target. Targets can be any 'compatible' function object (or function
|
||||
pointer), meaning that the arguments to the interface designated by
|
||||
Boost.Function can be converted to the arguments of the target
|
||||
function object.</para>
|
||||
</section>
|
||||
|
||||
<xi:include href="history.xml"/>
|
||||
<xi:include href="tutorial.xml"/>
|
||||
<xi:include href="reference.xml"/>
|
||||
<xi:include href="faq.xml"/>
|
||||
<xi:include href="misc.xml"/>
|
||||
<xi:include href="tests.xml"/>
|
||||
|
||||
</library>
|
||||
@ -1,87 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!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="$Date$">
|
||||
<title>History & Compatibility Notes</title>
|
||||
|
||||
<itemizedlist spacing="compact">
|
||||
<listitem><para><emphasis role="bold">Version 1.30.0</emphasis>: </para>
|
||||
<itemizedlist spacing="compact">
|
||||
<listitem><para>All features deprecated in version 1.29.0 have
|
||||
been removed from Boost.Function.</para></listitem>
|
||||
|
||||
<listitem><para><code><classname>boost::function</classname></code>
|
||||
and <code><classname>boost::functionN</classname></code> objects
|
||||
can be assigned to 0 (semantically equivalent to calling
|
||||
<code><methodname
|
||||
alt="boost::function::clear">clear</methodname>()</code>) and
|
||||
compared against 0 (semantically equivalent to calling
|
||||
<code><methodname
|
||||
alt="boost::function::empty">empty</methodname>()</code>).</para></listitem>
|
||||
|
||||
<listitem><para>The Boost.Function code is now generated
|
||||
entirely by the <libraryname>Preprocessor</libraryname> library,
|
||||
so it is now possible to generate
|
||||
<code><classname>boost::function</classname></code> and
|
||||
<code><classname>boost::functionN</classname></code> class
|
||||
templates for any number of arguments.</para></listitem>
|
||||
|
||||
<listitem><para>The
|
||||
<classname>boost::bad_function_call</classname> exception class
|
||||
was introduced.</para></listitem>
|
||||
</itemizedlist>
|
||||
</listitem>
|
||||
|
||||
<listitem><para><emphasis role="bold">Version 1.29.0</emphasis>:
|
||||
Boost.Function has been partially redesigned to minimize the
|
||||
interface and make it cleaner. Several seldom- or never-used
|
||||
features of the older Boost.Function have been deprecated and will
|
||||
be removed in the near future. Here is a list of features that have
|
||||
been deprecated, the likely impact of the deprecations, and how to
|
||||
adjust your code:
|
||||
|
||||
<itemizedlist spacing="compact">
|
||||
<listitem><para>The <computeroutput>boost::function</computeroutput> class template syntax has
|
||||
changed. The old syntax, e.g., <computeroutput>boost::function<int, float,
|
||||
double, std::string></computeroutput>, has been changed to a more natural
|
||||
syntax <computeroutput>boost::function<int (float, double,
|
||||
std::string)></computeroutput>, where all return and argument types are
|
||||
encoded in a single function type parameter. Any other template
|
||||
parameters (e.g., the <computeroutput>Allocator</computeroutput>) follow this single
|
||||
parameter.</para>
|
||||
|
||||
<para> The resolution to this change depends on the
|
||||
abilities of your compiler: if your compiler supports template
|
||||
partial specialization and can parse function types (most do), modify
|
||||
your code to use the newer
|
||||
syntax (preferable) or directly use one of the
|
||||
<computeroutput>functionN</computeroutput> classes whose syntax has not
|
||||
changed. If your compiler does not support template partial
|
||||
specialization or function types, you must take the latter option and
|
||||
use the numbered Boost.Function classes. This option merely requires
|
||||
changing types such as <computeroutput>boost::function<void, int, int></computeroutput>
|
||||
to <computeroutput>boost::function2<void, int, int></computeroutput> (adding the number of
|
||||
function arguments to the end of the class name).</para>
|
||||
|
||||
<para> Support for the old syntax with the
|
||||
<computeroutput>boost::function</computeroutput> class template will persist for a short
|
||||
while, but will eventually be removed so that we can provide better
|
||||
error messages and link compatibility. </para></listitem>
|
||||
|
||||
<listitem><para>The invocation
|
||||
policy template parameter (<computeroutput>Policy</computeroutput>) has been deprecated
|
||||
and will be removed. There is no direct equivalent to this rarely
|
||||
used feature.</para></listitem>
|
||||
|
||||
<listitem><para>The mixin template parameter
|
||||
(<computeroutput>Mixin</computeroutput>) has been deprecated and will be removed. There
|
||||
is not direct equivalent to this rarely used feature.</para></listitem>
|
||||
|
||||
<listitem><para>The
|
||||
<computeroutput>set</computeroutput> methods have been deprecated and will be
|
||||
removed. Use the assignment operator instead.</para></listitem>
|
||||
</itemizedlist>
|
||||
</para>
|
||||
</listitem>
|
||||
</itemizedlist>
|
||||
</section>
|
||||
65
doc/misc.xml
65
doc/misc.xml
@ -1,65 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!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="$Date$">
|
||||
<title>Miscellaneous Notes</title>
|
||||
|
||||
<section>
|
||||
<title>Boost.Function vs. Function Pointers</title>
|
||||
<para>Boost.Function has several advantages over function pointers, namely:
|
||||
|
||||
<itemizedlist spacing="compact">
|
||||
<listitem><para>Boost.Function allows arbitrary compatible function objects to be targets (instead of requiring an exact function signature).</para></listitem>
|
||||
<listitem><para>Boost.Function may be used with argument-binding and other function object construction libraries.</para></listitem>
|
||||
<listitem><para>Boost.Function has predictible behavior when an empty function object is called. </para></listitem>
|
||||
</itemizedlist></para>
|
||||
|
||||
<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 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>
|
||||
</itemizedlist>
|
||||
</para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Performance</title>
|
||||
|
||||
<section>
|
||||
<title>Function object wrapper size</title>
|
||||
<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.</para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Invocation efficiency</title>
|
||||
<para> With a properly inlining compiler, an invocation of a function object requires one call through a function pointer. If the call is to a free function pointer, an additional call must be made to that function pointer (unless the compiler has very powerful interprocedural analysis).</para>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Combatting virtual function "bloat"</title>
|
||||
<para> The use of virtual functions tends to cause 'code bloat' on many compilers. When a class contains a virtual function, it is necessary to emit an additional function that classifies the type of the object. It has been our experience that these auxiliary functions increase the size of the executable significantly when many <computeroutput>boost::function</computeroutput> objects are used. </para>
|
||||
|
||||
<para> In Boost.Function, an alternative but equivalent approach was taken using free functions instead of virtual functions. The Boost.Function object essentially holds two pointers to make a valid target call: a void pointer to the function object it contains and a void pointer to an "invoker" that can call the function object, given the function pointer. This invoker function performs the argument and return value conversions Boost.Function provides. A third pointer points to a free function called the "manager", which handles the cloning and destruction of function objects. The scheme is typesafe because the only functions that actually handle the function object, the invoker and the manager, are instantiated given the type of the function object, so they can safely cast the incoming void pointer (the function object pointer) to the appropriate type.</para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Acknowledgements</title>
|
||||
|
||||
<para> Many people were involved in the construction of this
|
||||
library. William Kempf, Jesse Jones and Karl Nelson were all
|
||||
extremely helpful in isolating an interface and scope for the
|
||||
library. John Maddock managed the formal review, and many
|
||||
reviewers gave excellent comments on interface, implementation,
|
||||
and documentation. Peter Dimov led us to the function
|
||||
declarator-based syntax.</para>
|
||||
</section>
|
||||
</section>
|
||||
@ -1,503 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
|
||||
"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
|
||||
|
||||
<library-reference id="function.reference" last-revision="$Date$">
|
||||
|
||||
<section id="function.definitions">
|
||||
<title>Definitions</title>
|
||||
<para>
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para>A function object <computeroutput>f</computeroutput> is
|
||||
<emphasis>compatible</emphasis> if for the given set of argument
|
||||
types <computeroutput>Arg1</computeroutput>,
|
||||
<computeroutput>Arg2</computeroutput>, ...,
|
||||
<computeroutput>ArgN</computeroutput> and a
|
||||
return type <computeroutput>ResultType</computeroutput>, the
|
||||
appropriate following function is well-formed:
|
||||
<programlisting>
|
||||
<emphasis>// if ResultType is not <emphasis role="bold">void</emphasis></emphasis>
|
||||
ResultType foo(Arg1 arg1, Arg2 arg2, ..., Arg<emphasis>N</emphasis> arg<emphasis>N</emphasis>)
|
||||
{
|
||||
<emphasis role="bold">return</emphasis> f(arg1, arg2, ..., arg<emphasis>N</emphasis>);
|
||||
}
|
||||
|
||||
<emphasis>// if ResultType is <emphasis role="bold">void</emphasis></emphasis>
|
||||
ResultType foo(Arg1 arg1, Arg2 arg2, ..., Arg<emphasis>N</emphasis> arg<emphasis>N</emphasis>)
|
||||
{
|
||||
f(arg1, arg2, ..., arg<emphasis>N</emphasis>);
|
||||
}
|
||||
</programlisting></para>
|
||||
|
||||
<para> A special provision is made for pointers to member
|
||||
functions. Though they are not function objects, Boost.Function
|
||||
will adapt them internally to function objects. This requires
|
||||
that a pointer to member function of the form <code>R
|
||||
(X::*mf)(Arg1, Arg2, ..., ArgN)
|
||||
cv-quals</code> be adapted to a
|
||||
function object with the following function call operator
|
||||
overloads:
|
||||
<programlisting>
|
||||
<emphasis role="bold">template</emphasis><<emphasis role="bold">typename P</emphasis>>
|
||||
R <emphasis role="bold">operator</emphasis>()(<emphasis>cv-quals</emphasis> P& x, Arg1 arg1, Arg2 arg2, ..., Arg<emphasis>N</emphasis> arg<emphasis>N</emphasis>) <emphasis role="bold">const</emphasis>
|
||||
{
|
||||
<emphasis role="bold">return</emphasis> (*x).*mf(arg1, arg2, ..., arg<emphasis>N</emphasis>);
|
||||
}
|
||||
</programlisting>
|
||||
</para>
|
||||
</listitem>
|
||||
<listitem>
|
||||
<para>A function object <code>f</code> of
|
||||
type <code>F</code> is
|
||||
<emphasis>stateless</emphasis> if it is a function pointer or if
|
||||
<code><classname>boost::is_stateless</classname><T></code>
|
||||
is true. The construction of or copy to a Boost.Function object
|
||||
from a stateless function object will not cause exceptions to be
|
||||
thrown and will not allocate any storage.
|
||||
</para>
|
||||
</listitem>
|
||||
</itemizedlist>
|
||||
</para>
|
||||
</section>
|
||||
|
||||
<header name="boost/function.hpp">
|
||||
<namespace name="boost">
|
||||
<class name="bad_function_call">
|
||||
<inherit access="public"><classname>std::runtime_error</classname></inherit>
|
||||
<purpose>An exception type thrown when an instance of a <code>function</code> object is empty when invoked.</purpose>
|
||||
<constructor>
|
||||
<effects><simpara>Constructs a <code><classname>bad_function_call</classname></code> exception object.</simpara></effects>
|
||||
</constructor>
|
||||
</class>
|
||||
|
||||
<class name="function_base">
|
||||
<purpose>The common base class for all Boost.Function
|
||||
objects. Objects of type function_base may not be created
|
||||
directly.</purpose>
|
||||
|
||||
<method-group name="capacity">
|
||||
<method name="empty" cv="const">
|
||||
<type>bool</type>
|
||||
<returns><simpara><code>true</code> if <code>this</code> has a target, and <code>false</code> otherwise.</simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
</class>
|
||||
|
||||
<class name="functionN">
|
||||
<template>
|
||||
<template-type-parameter name="R"/>
|
||||
<template-type-parameter name="T1"/>
|
||||
<template-type-parameter name="T2"/>
|
||||
<template-varargs/>
|
||||
<template-type-parameter name="TN"/>
|
||||
<template-type-parameter name="Allocator">
|
||||
<default><classname>std::allocator</classname><void></default>
|
||||
</template-type-parameter>
|
||||
</template>
|
||||
|
||||
<inherit access="public"><classname>function_base</classname></inherit>
|
||||
|
||||
<purpose>A set of generalized function pointers that can be used for callbacks or wrapping function objects.</purpose>
|
||||
|
||||
<description>
|
||||
<para>Class template <classname>functionN</classname> is
|
||||
actually a family of related classes <classname
|
||||
alt="functionN">function0</classname>, <classname
|
||||
alt="functionN">function1</classname>, etc., up to some
|
||||
implementation-defined maximum. In this context, <code>N</code>
|
||||
refers to the number of parameters.</para>
|
||||
</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>
|
||||
<typedef name="first_argument_type">
|
||||
<type>T1</type>
|
||||
<purpose>If N == 2</purpose>
|
||||
</typedef>
|
||||
<typedef name="second_argument_type">
|
||||
<type>T2</type>
|
||||
<purpose>If N == 2</purpose>
|
||||
</typedef>
|
||||
<typedef name="arg1_type"><type>T1</type></typedef>
|
||||
<typedef name="arg2_type"><type>T2</type></typedef>
|
||||
<typedef name="..."><type/></typedef>
|
||||
<typedef name="argN_type"><type>TN</type></typedef>
|
||||
|
||||
<static-constant name="arity">
|
||||
<type>int</type>
|
||||
<default>N</default>
|
||||
</static-constant>
|
||||
|
||||
<struct name="sig">
|
||||
<template>
|
||||
<template-type-parameter name="Args"/>
|
||||
</template>
|
||||
|
||||
<purpose>
|
||||
<simpara><libraryname>Lambda</libraryname> library support</simpara>
|
||||
</purpose>
|
||||
|
||||
<typedef name="type"><type>result_type</type></typedef>
|
||||
</struct>
|
||||
|
||||
<constructor>
|
||||
<postconditions><simpara><code>this-><methodname>empty</methodname>()</code></simpara></postconditions>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<constructor>
|
||||
<parameter name="f">
|
||||
<paramtype>const <classname>functionN</classname>&</paramtype>
|
||||
</parameter>
|
||||
<postconditions><simpara>Contains a copy of the <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code>.</simpara></postconditions>
|
||||
<throws><simpara>Will not throw unless copying the target of <code>f</code> throws.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<constructor>
|
||||
<template>
|
||||
<template-type-parameter name="F"/>
|
||||
</template>
|
||||
<parameter name="f"><paramtype>F</paramtype></parameter>
|
||||
<requires><simpara>F is a function object Callable from <code>this</code>.</simpara></requires>
|
||||
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code> if <code>f</code> is nonempty, or <code>this-><methodname>empty</methodname>()</code> if <code>f</code> is empty.</simpara></postconditions>
|
||||
<throws><simpara>Will not throw when <code>f</code> is a stateless function object.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects><simpara>If <code>!this-><methodname>empty</methodname>()</code>, destroys the target of this.</simpara></effects>
|
||||
|
||||
</destructor>
|
||||
|
||||
<copy-assignment>
|
||||
<parameter name="f">
|
||||
<paramtype>const <classname>functionN</classname>&</paramtype>
|
||||
</parameter>
|
||||
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code>.</simpara></postconditions>
|
||||
<throws><simpara>Will not throw when the target of <code>f</code> is a stateless function object or a reference to the function object.</simpara></throws>
|
||||
</copy-assignment>
|
||||
|
||||
<method-group name="modifiers">
|
||||
<method name="swap">
|
||||
<type>void</type>
|
||||
<parameter name="f"><paramtype>const <classname>functionN</classname>&</paramtype></parameter>
|
||||
<effects><simpara>Interchanges the targets of <code>*this</code> and <code>f</code>.</simpara></effects>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="clear">
|
||||
<type>void</type>
|
||||
<postconditions><simpara>this-><methodname>empty</methodname>()</simpara></postconditions>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="capacity">
|
||||
<method name="empty" cv="const">
|
||||
<type>bool</type>
|
||||
<returns><simpara><code>true</code> if <code>this</code> has a target, and <code>false</code> otherwise.</simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="conversion-operator" cv="const">
|
||||
<type>safe_bool</type>
|
||||
<returns><simpara>A <code>safe_bool</code> that evaluates <code>false</code> in a boolean context when <code>this-><methodname>empty</methodname>()</code>, and <code>true</code> otherwise.</simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="operator!" cv="const">
|
||||
<type>bool</type>
|
||||
<returns><simpara><code>this-><methodname>empty</methodname>()</code></simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="invocation">
|
||||
<method name="operator()" cv="const">
|
||||
<type>result_type</type>
|
||||
<parameter name="a1"><paramtype>arg1_type</paramtype></parameter>
|
||||
<parameter name="a2"><paramtype>arg2_type</paramtype></parameter>
|
||||
<parameter><paramtype>...</paramtype></parameter>
|
||||
<parameter name="aN"><paramtype>argN_type</paramtype></parameter>
|
||||
<effects><simpara><code>f(a1, a2, ..., aN)</code>, where <code>f</code> is the target of <code>*this</code>.</simpara></effects>
|
||||
<returns><simpara>if <code>R</code> is <code>void</code>, nothing is returned; otherwise, the return value of the call to <code>f</code> is returned.</simpara></returns>
|
||||
<throws><simpara><code><classname>bad_function_call</classname></code> if <code>!this-><methodname>empty</methodname>()</code>. Otherwise, may through any exception thrown by the target function <code>f</code>.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<free-function-group name="specialized algorithms">
|
||||
<function name="swap">
|
||||
<template>
|
||||
<template-type-parameter name="T1"/>
|
||||
<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><T1, T2, ..., TN, Allocator>&</paramtype></parameter>
|
||||
<parameter name="f2"><paramtype><classname>functionN</classname><T1, T2, ..., TN, Allocator>&</paramtype></parameter>
|
||||
<effects><simpara><code>f1.<methodname>swap</methodname>(f2)</code></simpara></effects>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</function>
|
||||
</free-function-group>
|
||||
|
||||
<free-function-group name="undefined operators">
|
||||
<function name="operator==">
|
||||
<template>
|
||||
<template-type-parameter name="T1"/>
|
||||
<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><T1, T2, ..., TN, Allocator1>&</paramtype></parameter>
|
||||
<parameter name="f2"><paramtype>const <classname>functionN</classname><U1, U2, ..., UN, Allocator2>&</paramtype></parameter>
|
||||
<notes><simpara>This function must be left undefined.</simpara></notes>
|
||||
<rationale><simpara>The <code>safe_bool</code> conversion opens a loophole whereby two function instances can be compared via <code>==</code>. This undefined <code>void operator ==</code> closes the loophole and ensures a compile-time or link-time error.</simpara></rationale>
|
||||
</function>
|
||||
|
||||
<function name="operator!=">
|
||||
<template>
|
||||
<template-type-parameter name="T1"/>
|
||||
<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><T1, T2, ..., TN, Allocator1>&</paramtype></parameter>
|
||||
<parameter name="f2"><paramtype>const <classname>functionN</classname><U1, U2, ..., UN, Allocator2>&</paramtype></parameter>
|
||||
<notes><simpara>This function must be left undefined.</simpara></notes>
|
||||
<rationale><simpara>The <code>safe_bool</code> conversion opens a loophole whereby two function instances can be compared via <code>!=</code>. This undefined <code>void operator !=</code> closes the loophole and ensures a compile-time or link-time error.</simpara></rationale>
|
||||
</function>
|
||||
</free-function-group>
|
||||
</class>
|
||||
|
||||
<class name="function">
|
||||
<template>
|
||||
<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><void></default>
|
||||
</template-type-parameter>
|
||||
</template>
|
||||
<inherit access="public"><classname>functionN</classname><R, T1, T2, ..., TN, Allocator></inherit>
|
||||
|
||||
<purpose>A generalized function pointer that can be used for
|
||||
callbacks or wrapping function objects.</purpose>
|
||||
|
||||
<description>
|
||||
<para>Class template <classname>function</classname> is a thin
|
||||
wrapper around the numbered class templates <classname
|
||||
alt="functionN">function0</classname>, <classname
|
||||
alt="functionN">function1</classname>, etc. It accepts a
|
||||
function type with N arguments and will will derive from
|
||||
<classname>functionN</classname> instantiated with the arguments
|
||||
it receives.</para>
|
||||
|
||||
<para>The semantics of all operations in class template
|
||||
<classname>function</classname> are equivalent to that of the
|
||||
underlying <classname>functionN</classname> object, although
|
||||
additional member functions are required to allow proper copy
|
||||
construction and copy assignment of function objects.</para>
|
||||
</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>
|
||||
<typedef name="first_argument_type">
|
||||
<type>T1</type>
|
||||
<purpose>If N == 2</purpose>
|
||||
</typedef>
|
||||
<typedef name="second_argument_type">
|
||||
<type>T2</type>
|
||||
<purpose>If N == 2</purpose>
|
||||
</typedef>
|
||||
<typedef name="arg1_type"><type>T1</type></typedef>
|
||||
<typedef name="arg2_type"><type>T2</type></typedef>
|
||||
<typedef name="..."><type/></typedef>
|
||||
<typedef name="argN_type"><type>TN</type></typedef>
|
||||
|
||||
<static-constant name="arity">
|
||||
<type>int</type>
|
||||
<default>N</default>
|
||||
</static-constant>
|
||||
|
||||
<struct name="sig">
|
||||
<template>
|
||||
<template-type-parameter name="Args"/>
|
||||
</template>
|
||||
|
||||
<purpose>
|
||||
<simpara><libraryname>Lambda</libraryname> library support</simpara>
|
||||
</purpose>
|
||||
|
||||
<typedef name="type"><type>result_type</type></typedef>
|
||||
</struct>
|
||||
|
||||
<constructor>
|
||||
<postconditions><simpara><code>this-><methodname>empty</methodname>()</code></simpara></postconditions>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<constructor>
|
||||
<parameter name="f">
|
||||
<paramtype>const <classname>functionN</classname>&</paramtype>
|
||||
</parameter>
|
||||
<postconditions><simpara>Contains a copy of the <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code>.</simpara></postconditions>
|
||||
<throws><simpara>Will not throw unless copying the target of <code>f</code> throws.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<constructor>
|
||||
<parameter name="f">
|
||||
<paramtype>const <classname>function</classname>&</paramtype>
|
||||
</parameter>
|
||||
<postconditions><simpara>Contains a copy of the <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code>.</simpara></postconditions>
|
||||
<throws><simpara>Will not throw unless copying the target of <code>f</code> throws.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<constructor>
|
||||
<template>
|
||||
<template-type-parameter name="F"/>
|
||||
</template>
|
||||
<parameter name="f"><paramtype>F</paramtype></parameter>
|
||||
<requires><simpara>F is a function object Callable from <code>this</code>.</simpara></requires>
|
||||
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code> if <code>f</code> is nonempty, or <code>this-><methodname>empty</methodname>()</code> if <code>f</code> is empty.</simpara></postconditions>
|
||||
<throws><simpara>Will not throw when <code>f</code> is a stateless function object.</simpara></throws>
|
||||
</constructor>
|
||||
|
||||
<destructor>
|
||||
<effects><simpara>If <code>!this-><methodname>empty</methodname>()</code>, destroys the target of <code>this</code>.</simpara></effects>
|
||||
|
||||
</destructor>
|
||||
|
||||
<copy-assignment>
|
||||
<parameter name="f">
|
||||
<paramtype>const <classname>functionN</classname>&</paramtype>
|
||||
</parameter>
|
||||
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code></simpara></postconditions>
|
||||
<throws><simpara>Will not throw when the target of <code>f</code> is a stateless function object or a reference to the function object.</simpara></throws>
|
||||
</copy-assignment>
|
||||
|
||||
<copy-assignment>
|
||||
<parameter name="f">
|
||||
<paramtype>const <classname>function</classname>&</paramtype>
|
||||
</parameter>
|
||||
<postconditions><simpara><code>*this</code> targets a copy of <code>f</code>'s target, if it has one, or is empty if <code>f.<methodname>empty</methodname>()</code></simpara></postconditions>
|
||||
<throws><simpara>Will not throw when the target of <code>f</code> is a stateless function object or a reference to the function object.</simpara></throws>
|
||||
</copy-assignment>
|
||||
|
||||
<method-group name="modifiers">
|
||||
<method name="swap">
|
||||
<type>void</type>
|
||||
<parameter name="f"><paramtype>const <classname>function</classname>&</paramtype></parameter>
|
||||
<effects><simpara>Interchanges the targets of <code>*this</code> and <code>f</code>.</simpara></effects>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="clear">
|
||||
<type>void</type>
|
||||
<postconditions><simpara><code>this-><methodname>empty</methodname>()</code></simpara></postconditions>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="capacity">
|
||||
<method name="empty" cv="const">
|
||||
<type>bool</type>
|
||||
<returns><simpara><code>true</code> if <code>this</code> has a target, and <code>false</code> otherwise.</simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="conversion-operator" cv="const">
|
||||
<type>safe_bool</type>
|
||||
<returns><simpara>A <code>safe_bool</code> that evaluates <code>false</code> in a boolean context when <code>this-><methodname>empty</methodname>()</code>, and <code>true</code> otherwise.</simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
|
||||
<method name="operator!" cv="const">
|
||||
<type>bool</type>
|
||||
<returns><simpara><code>this-><methodname>empty</methodname>()</code></simpara></returns>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<method-group name="invocation">
|
||||
<method name="operator()" cv="const">
|
||||
<type>result_type</type>
|
||||
<parameter name="a1"><paramtype>arg1_type</paramtype></parameter>
|
||||
<parameter name="a2"><paramtype>arg2_type</paramtype></parameter>
|
||||
<parameter><paramtype>...</paramtype></parameter>
|
||||
<parameter name="aN"><paramtype>argN_type</paramtype></parameter>
|
||||
<effects><simpara><code>f(a1, a2, ..., aN)</code>, where <code>f</code> is the target of <code>*this</code>.</simpara></effects>
|
||||
<returns><simpara>if <code>R</code> is <code>void</code>, nothing is returned; otherwise, the return value of the call to <code>f</code> is returned.</simpara></returns>
|
||||
<throws><simpara><code><classname>bad_function_call</classname></code> if <code>!this-><methodname>empty</methodname>()</code>. Otherwise, may through any exception thrown by the target function <code>f</code>.</simpara></throws>
|
||||
</method>
|
||||
</method-group>
|
||||
|
||||
<free-function-group name="specialized algorithms">
|
||||
<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><Signature, Allocator>&</paramtype></parameter>
|
||||
<parameter name="f2"><paramtype><classname>function</classname><Signature, Allocator>&</paramtype></parameter>
|
||||
<effects><simpara><code>f1.<methodname>swap</methodname>(f2)</code></simpara></effects>
|
||||
<throws><simpara>Will not throw.</simpara></throws>
|
||||
</function>
|
||||
</free-function-group>
|
||||
|
||||
<free-function-group name="undefined operators">
|
||||
<function name="operator==">
|
||||
<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><Signature1, Allocator1>&</paramtype></parameter>
|
||||
<parameter name="f2"><paramtype>const <classname>function</classname><Signature2, Allocator2>&</paramtype></parameter>
|
||||
<notes><simpara>This function must be left undefined.</simpara></notes>
|
||||
<rationale><simpara>The <code>safe_bool</code> conversion opens a loophole whereby two function instances can be compared via <code>==</code>. This undefined <code>void operator ==</code> closes the loophole and ensures a compile-time or link-time error.</simpara></rationale>
|
||||
</function>
|
||||
|
||||
<function name="operator!=">
|
||||
<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><Signature1, Allocator1>&</paramtype></parameter>
|
||||
<parameter name="f2"><paramtype>const <classname>function</classname><Signature2, Allocator2>&</paramtype></parameter>
|
||||
<notes><simpara>This function must be left undefined.</simpara></notes>
|
||||
<rationale><simpara>The <code>safe_bool</code> conversion opens a loophole whereby two function instances can be compared via <code>!=</code>. This undefined <code>void operator !=</code> closes the loophole and ensures a compile-time or link-time error.</simpara></rationale>
|
||||
</function>
|
||||
</free-function-group>
|
||||
</class>
|
||||
</namespace>
|
||||
</header>
|
||||
</library-reference>
|
||||
245
doc/tests.xml
245
doc/tests.xml
@ -1,245 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!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="$Date$">
|
||||
<run-test filename="function_test.cpp" name="lib_function_test">
|
||||
<purpose><para>Test the capabilities of the <classname>boost::function</classname> class template.</para></purpose>
|
||||
<if-fails><para>The <classname>boost::function</classname> class template may not be usable on your compiler. However, the library may still be usable via the <classname>boost::functionN</classname> class templates.</para></if-fails>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="function_n_test.cpp">
|
||||
<purpose><para>Test the capabilities of the <classname>boost::functionN</classname> class templates.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="allocator_test.cpp">
|
||||
<purpose><para>Test the use of custom allocators.</para></purpose>
|
||||
<if-fails><para>Allocators are ignored by the implementation.</para></if-fails>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="stateless_test.cpp">
|
||||
<purpose><para>Test the optimization of stateless function objects in the Boost.Function library.</para></purpose>
|
||||
<if-fails><para>The exception-safety and performance guarantees given for stateless function objects may not be met by the implementation.</para></if-fails>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="lambda_test.cpp">
|
||||
<purpose><para>Test the interaction between Boost.Function and Boost.Lambda.</para></purpose>
|
||||
<if-fails><para>Either Boost.Lambda does not work on the platform, or Boost.Function cannot safely be applied without the use of <functionname>boost::unlambda</functionname>.</para></if-fails>
|
||||
</run-test>
|
||||
|
||||
<compile-fail-test filename="function_test_fail1.cpp">
|
||||
<purpose><para>Test the (incorrect!) use of comparisons between Boost.Function function objects.</para></purpose>
|
||||
<if-fails><para>Intuitive (but incorrect!) code may compile and will give meaningless results.</para></if-fails>
|
||||
</compile-fail-test>
|
||||
|
||||
<compile-fail-test filename="function_test_fail2.cpp">
|
||||
<purpose><para>Test the use of an incompatible function object with Boost.Function</para></purpose>
|
||||
<if-fails><para>Incorrect code may compile (with potentially unexpected results).</para></if-fails>
|
||||
</compile-fail-test>
|
||||
|
||||
<compile-test filename="function_30.cpp">
|
||||
<purpose><para>Test the generation of a Boost.Function function object adaptor accepting 30 arguments.</para></purpose>
|
||||
<if-fails><para>The Boost.Function library may work for function object adaptors of up to 10 parameters, but will be unable to generate adaptors for an arbitrary number of parameters. Failure often indicates an error in the compiler's preprocessor.</para></if-fails>
|
||||
</compile-test>
|
||||
|
||||
<run-test filename="function_arith_cxx98.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
]]>
|
||||
|
||||
<snippet name="function.tutorial.mul_ints"/>
|
||||
<snippet name="function.tutorial.int_div"/>
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.arith.cxx98"/>
|
||||
<snippet name="function.tutorial.use_int_div"/>
|
||||
<snippet name="function.tutorial.call_int_div"/>
|
||||
<snippet name="function.tutorial.check_empty"/>
|
||||
<snippet name="function.tutorial.clear"/>
|
||||
<snippet name="function.tutorial.use_mul_ints"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test the first tutorial example.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="function_arith_portable.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
]]>
|
||||
<snippet name="function.tutorial.mul_ints"/>
|
||||
<snippet name="function.tutorial.int_div"/>
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.arith.portable"/>
|
||||
<snippet name="function.tutorial.use_int_div"/>
|
||||
<snippet name="function.tutorial.call_int_div"/>
|
||||
<snippet name="function.tutorial.check_empty"/>
|
||||
<snippet name="function.tutorial.clear"/>
|
||||
<snippet name="function.tutorial.use_mul_ints"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test the first tutorial example.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="sum_avg_cxx98.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
]]>
|
||||
<snippet name="function.tutorial.sum_avg"/>
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.sum_avg_decl.cxx98"/>
|
||||
<snippet name="function.tutorial.use_sum_avg"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test the second tutorial example.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="sum_avg_portable.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
]]>
|
||||
<snippet name="function.tutorial.sum_avg"/>
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.sum_avg_decl.portable"/>
|
||||
<snippet name="function.tutorial.use_sum_avg"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test the second tutorial example.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="mem_fun_cxx98.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
]]>
|
||||
<snippet name="function.tutorial.X"/>
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.mem_fun.cxx98"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test member function example from tutorial.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="mem_fun_portable.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
]]>
|
||||
<snippet name="function.tutorial.X"/>
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.mem_fun.portable"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test member function example from tutorial.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="std_bind_cxx98.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
]]>
|
||||
<snippet name="function.tutorial.X"/>
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.std_bind.cxx98"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test standard binders example from tutorial.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="std_bind_portable.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
]]>
|
||||
<snippet name="function.tutorial.X"/>
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.std_bind.portable"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test standard binders example from tutorial.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="function_ref_cxx98.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
]]>
|
||||
|
||||
struct stateful_type { int operator()(int) const { return 0; } };
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.ref.cxx98"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test <functionname>boost::ref</functionname> example from tutorial.</para></purpose>
|
||||
</run-test>
|
||||
|
||||
<run-test filename="function_ref_portable.cpp">
|
||||
<source>
|
||||
<![CDATA[
|
||||
#include <boost/function.hpp>
|
||||
#include <iostream>
|
||||
]]>
|
||||
|
||||
struct stateful_type { int operator()(int) const { return 0; } };
|
||||
|
||||
int main()
|
||||
{
|
||||
<snippet name="function.tutorial.ref.portable"/>
|
||||
|
||||
return 0;
|
||||
}
|
||||
</source>
|
||||
<purpose><para>Test <functionname>boost::ref</functionname> example from tutorial.</para></purpose>
|
||||
</run-test>
|
||||
</testsuite>
|
||||
325
doc/tutorial.xml
325
doc/tutorial.xml
@ -1,325 +0,0 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<!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"
|
||||
last-revision="$Date$">
|
||||
<title>Tutorial</title>
|
||||
|
||||
<using-namespace name="boost"/>
|
||||
|
||||
<para> Boost.Function has two syntactical forms: the preferred form
|
||||
and the portable form. The preferred form fits more closely with the
|
||||
C++ language and reduces the number of separate template parameters
|
||||
that need to be considered, often improving readability; however, the
|
||||
preferred form is not supported on all platforms due to compiler
|
||||
bugs. The compatible form will work on all compilers supported by
|
||||
Boost.Function. Consult the table below to determine which syntactic
|
||||
form to use for your compiler.
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Preferred syntax</entry>
|
||||
<entry>Portable syntax</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<itemizedlist spacing="compact">
|
||||
<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</simpara></listitem>
|
||||
</itemizedlist>
|
||||
</entry>
|
||||
<entry>
|
||||
<itemizedlist spacing="compact">
|
||||
<listitem><simpara><emphasis>Any compiler supporting the preferred syntax</emphasis></simpara></listitem>
|
||||
<listitem><simpara>Microsoft Visual C++ 6.0, 7.0</simpara></listitem>
|
||||
<listitem><simpara>Borland C++ 5.5.1</simpara></listitem>
|
||||
<listitem><simpara>Sun WorkShop 6 update 2 C++ 5.3</simpara></listitem>
|
||||
<listitem><simpara>Metrowerks CodeWarrior 8.1</simpara></listitem>
|
||||
</itemizedlist>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
|
||||
</para>
|
||||
|
||||
<para> If your compiler does not appear in this list, please try the preferred syntax and report your results to the Boost list so that we can keep this table up-to-date.</para>
|
||||
|
||||
<using-class name="boost::function"/>
|
||||
|
||||
<section>
|
||||
<title>Basic Usage</title> <para> A function wrapper is defined simply
|
||||
by instantiating the <computeroutput>function</computeroutput> class
|
||||
template with the desired return type and argument types, formulated
|
||||
as a C++ function type. Any number of arguments may be supplied, up to
|
||||
some implementation-defined limit (10 is the default maximum). The
|
||||
following declares a function object wrapper
|
||||
<computeroutput>f</computeroutput> that takes two
|
||||
<computeroutput>int</computeroutput> parameters and returns a
|
||||
<computeroutput>float</computeroutput>:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Preferred syntax</entry>
|
||||
<entry>Portable syntax</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.arith.cxx98"><classname>boost::function</classname><float (int x, int y)> f;</programlisting>
|
||||
</entry>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.arith.portable"><classname alt="functionN">boost::function2</classname><float, int, int> f;</programlisting>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para> By default, function object wrappers are empty, so we can create a
|
||||
function object to assign to <computeroutput>f</computeroutput>:
|
||||
|
||||
<programlisting name="function.tutorial.int_div">struct int_div {
|
||||
float operator()(int x, int y) const { return ((float)x)/y; };
|
||||
};</programlisting>
|
||||
<programlisting name="function.tutorial.use_int_div">f = int_div();</programlisting>
|
||||
</para>
|
||||
|
||||
<para> Now we can use <computeroutput>f</computeroutput> to execute
|
||||
the underlying function object
|
||||
<computeroutput>int_div</computeroutput>:
|
||||
|
||||
<programlisting name="function.tutorial.call_int_div">std::cout << f(5, 3) << std::endl;</programlisting>
|
||||
</para>
|
||||
|
||||
<para> We are free to assign any compatible function object to
|
||||
<computeroutput>f</computeroutput>. If
|
||||
<computeroutput>int_div</computeroutput> had been declared to take two
|
||||
<computeroutput>long</computeroutput> operands, the implicit
|
||||
conversions would have been applied to the arguments without any user
|
||||
interference. The only limit on the types of arguments is that they be
|
||||
CopyConstructible, so we can even use references and arrays:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="1" align="left">
|
||||
<thead><row><entry>Preferred syntax</entry></row></thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.sum_avg_decl.cxx98"><classname>boost::function</classname><void (int values[], int n, int& sum, float& avg)> sum_avg;</programlisting>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
<informaltable>
|
||||
<tgroup cols="1" align="left">
|
||||
<thead><row><entry>Portable syntax</entry></row></thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.sum_avg_decl.portable"><classname alt="functionN">boost::function4</classname><void, int*, int, int&, float&> sum_avg;</programlisting>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
|
||||
<programlisting name="function.tutorial.sum_avg">void do_sum_avg(int values[], int n, int& sum, float& avg)
|
||||
{
|
||||
sum = 0;
|
||||
for (int i = 0; i < n; i++)
|
||||
sum += values[i];
|
||||
avg = (float)sum / n;
|
||||
}</programlisting>
|
||||
|
||||
|
||||
<programlisting name="function.tutorial.use_sum_avg">sum_avg = &do_sum_avg;</programlisting>
|
||||
</para>
|
||||
|
||||
<para> Invoking a function object wrapper that does not actually
|
||||
contain a function object is a precondition violation, much like
|
||||
trying to call through a null function pointer, and will throw a <classname>bad_function_call</classname> exception). We can check for an
|
||||
empty function object wrapper by using it in a boolean context (it evaluates <computeroutput>true</computeroutput> if the wrapper is not empty) or compare it against <computeroutput>0</computeroutput>. For instance:
|
||||
<programlisting name="function.tutorial.check_empty">if (f)
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
else
|
||||
std::cout << "f has no target, so it is unsafe to call" << std::endl;</programlisting>
|
||||
</para>
|
||||
|
||||
<para> Alternatively,
|
||||
<computeroutput><methodname>empty</methodname>()</computeroutput>
|
||||
method will return whether or not the wrapper is empty. </para>
|
||||
|
||||
<para> Finally, we can clear out a function target by assigning it to <computeroutput>0</computeroutput> or by calling the <computeroutput><methodname>clear</methodname>()</computeroutput> member function, e.g.,
|
||||
<programlisting name="function.tutorial.clear">f = 0;</programlisting>
|
||||
</para>
|
||||
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Free functions</title>
|
||||
<para> Free function pointers can be considered singleton function objects with const function call operators, and can therefore be directly used with the function object wrappers:
|
||||
<programlisting name="function.tutorial.mul_ints">float mul_ints(int x, int y) { return ((float)x) * y; }</programlisting>
|
||||
<programlisting name="function.tutorial.use_mul_ints">f = &mul_ints;</programlisting>
|
||||
</para>
|
||||
|
||||
<para> Note that the <computeroutput>&</computeroutput> isn't really necessary unless you happen to be using Microsoft Visual C++ version 6. </para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Member functions</title>
|
||||
|
||||
<para> In many systems, callbacks often call to member functions of a
|
||||
particular object. This is often referred to as "argument binding",
|
||||
and is beyond the scope of Boost.Function. The use of member functions
|
||||
directly, however, is supported, so the following code is valid:
|
||||
|
||||
<programlisting name="function.tutorial.X">struct X {
|
||||
int foo(int);
|
||||
};</programlisting>
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Preferred syntax</entry>
|
||||
<entry>Portable syntax</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.mem_fun.cxx98"><classname>boost::function</classname><int (X*, int)> f;
|
||||
|
||||
f = &X::foo;
|
||||
|
||||
X x;
|
||||
f(&x, 5);</programlisting>
|
||||
</entry>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.mem_fun.portable"><classname alt="functionN">boost::function2</classname><int, X*, int> f;
|
||||
|
||||
f = &X::foo;
|
||||
|
||||
X x;
|
||||
f(&x, 5);</programlisting>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para> Several libraries exist that support argument binding. Three such libraries are summarized below:
|
||||
<itemizedlist>
|
||||
<listitem> <para><libraryname>Bind</libraryname>. This library allows binding of
|
||||
arguments for any function object. It is lightweight and very
|
||||
portable.</para></listitem>
|
||||
|
||||
<listitem> <para>The C++ Standard library. Using
|
||||
<computeroutput>std::bind1st</computeroutput> and
|
||||
<computeroutput>std::mem_fun</computeroutput> together one can bind
|
||||
the object of a pointer-to-member function for use with
|
||||
Boost.Function:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Preferred syntax</entry>
|
||||
<entry>Portable syntax</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.std_bind.cxx98"> <classname>boost::function</classname><int (int)> f;
|
||||
X x;
|
||||
f = std::bind1st(
|
||||
std::mem_fun(&X::foo), &x);
|
||||
f(5); // Call x.foo(5)</programlisting>
|
||||
</entry>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.std_bind.portable"> <classname alt="functionN">boost::function1</classname><int, int> f;
|
||||
X x;
|
||||
f = std::bind1st(
|
||||
std::mem_fun(&X::foo), &x);
|
||||
f(5); // Call x.foo(5)</programlisting>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
</listitem>
|
||||
|
||||
<listitem><para>The <libraryname>Lambda</libraryname> library. This library provides a powerful composition mechanism to construct function objects that uses very natural C++ syntax. Lambda requires a compiler that is reasonably conformant to the C++ standard. </para></listitem>
|
||||
</itemizedlist>
|
||||
</para>
|
||||
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>References to Functions</title> <para> In some cases it is
|
||||
expensive (or semantically incorrect) to have Boost.Function clone a
|
||||
function object. In such cases, it is possible to request that
|
||||
Boost.Function keep only a reference to the actual function
|
||||
object. This is done using the <computeroutput>ref</computeroutput>
|
||||
and <computeroutput>cref</computeroutput> functions to wrap a
|
||||
reference to a function object:
|
||||
|
||||
<informaltable>
|
||||
<tgroup cols="2" align="left">
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Preferred syntax</entry>
|
||||
<entry>Portable syntax</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.ref.cxx98"> stateful_type a_function_object;
|
||||
<classname>boost::function</classname><int (int)> f;
|
||||
f = <functionname>boost::ref</functionname>(a_function_object);
|
||||
|
||||
<classname>boost::function</classname><int (int)> f2(f);</programlisting>
|
||||
</entry>
|
||||
<entry>
|
||||
<programlisting name="function.tutorial.ref.portable"> stateful_type a_function_object;
|
||||
<classname alt="functionN">boost::function1</classname><int, int> f;
|
||||
f = <functionname>boost::ref</functionname>(a_function_object);
|
||||
|
||||
<classname alt="functionN">boost::function1</classname><int, int> f2(f);</programlisting>
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
</para>
|
||||
|
||||
<para> Here, <computeroutput>f</computeroutput> will not make a copy
|
||||
of <computeroutput>a_function_object</computeroutput>, nor will
|
||||
<computeroutput>f2</computeroutput> when it is targeted to
|
||||
<computeroutput>f</computeroutput>'s reference to
|
||||
<computeroutput>a_function_object</computeroutput>. Additionally, when
|
||||
using references to function objects, Boost.Function will not throw
|
||||
exceptions during assignment or construction.
|
||||
</para>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
@ -1,32 +0,0 @@
|
||||
// Boost.Function library examples
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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 <iostream>
|
||||
#include <boost/function.hpp>
|
||||
#include <functional>
|
||||
|
||||
struct X {
|
||||
X(int val) : value(val) {}
|
||||
|
||||
int foo(int x) { return x * value; }
|
||||
|
||||
int value;
|
||||
};
|
||||
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
boost::function<int (int)> f;
|
||||
X x(7);
|
||||
f = std::bind1st(std::mem_fun(&X::foo), &x);
|
||||
|
||||
std::cout << f(5) << std::endl; // Call x.foo(5)
|
||||
return 0;
|
||||
}
|
||||
@ -1,26 +0,0 @@
|
||||
// Boost.Function library examples
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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 <iostream>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
struct int_div {
|
||||
float operator()(int x, int y) const { return ((float)x)/y; };
|
||||
};
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
boost::function<float (int, int)> f;
|
||||
f = int_div();
|
||||
|
||||
std::cout << f(5, 3) << std::endl; // 1.66667
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,38 +0,0 @@
|
||||
// Boost.Function library examples
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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 <iostream>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
void do_sum_avg(int values[], int n, int& sum, float& avg)
|
||||
{
|
||||
sum = 0;
|
||||
for (int i = 0; i < n; i++)
|
||||
sum += values[i];
|
||||
avg = (float)sum / n;
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
// The second parameter should be int[], but some compilers (e.g., GCC)
|
||||
// complain about this
|
||||
boost::function<void (int*, int, int&, float&)> sum_avg;
|
||||
|
||||
sum_avg = &do_sum_avg;
|
||||
|
||||
int values[5] = { 1, 1, 2, 3, 5 };
|
||||
int sum;
|
||||
float avg;
|
||||
sum_avg(values, 5, sum, avg);
|
||||
|
||||
std::cout << "sum = " << sum << std::endl;
|
||||
std::cout << "avg = " << avg << std::endl;
|
||||
return 0;
|
||||
}
|
||||
@ -1,6 +1,6 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. Use, modification and
|
||||
// Copyright Doug Gregor 2001-2004. 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)
|
||||
@ -14,17 +14,32 @@
|
||||
#include <string>
|
||||
#include <memory>
|
||||
#include <new>
|
||||
#include <typeinfo>
|
||||
#include <boost/config.hpp>
|
||||
#include <boost/assert.hpp>
|
||||
#include <boost/type_traits/arithmetic_traits.hpp>
|
||||
#include <boost/type_traits/is_integral.hpp>
|
||||
#include <boost/type_traits/composite_traits.hpp>
|
||||
#include <boost/type_traits/is_stateless.hpp>
|
||||
#include <boost/ref.hpp>
|
||||
#include <boost/pending/ct_if.hpp>
|
||||
#include <boost/detail/workaround.hpp>
|
||||
|
||||
#ifndef BOOST_NO_SFINAE
|
||||
# include "boost/utility/enable_if.hpp"
|
||||
#else
|
||||
# include "boost/mpl/bool.hpp"
|
||||
#endif
|
||||
#include <boost/function_equal.hpp>
|
||||
|
||||
// Borrowed from Boost.Python library: determines the cases where we
|
||||
// need to use std::type_info::name to compare instead of operator==.
|
||||
# if (defined(__GNUC__) && __GNUC__ >= 3) \
|
||||
|| defined(_AIX) \
|
||||
|| ( defined(__sgi) && defined(__host_mips))
|
||||
# include <cstring>
|
||||
# define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) \
|
||||
(std::strcmp((X).name(),(Y).name()) == 0)
|
||||
# else
|
||||
# define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) ((X)==(Y))
|
||||
#endif
|
||||
|
||||
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 || defined(__ICL) && __ICL <= 600 || defined(__MWERKS__) && __MWERKS__ < 0x2406 && !defined(BOOST_STRICT_CONFIG)
|
||||
@ -48,6 +63,12 @@ namespace boost { namespace python { namespace objects {
|
||||
# define BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX
|
||||
#endif
|
||||
|
||||
#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), \
|
||||
Type>::type
|
||||
|
||||
|
||||
#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
|
||||
namespace boost {
|
||||
|
||||
@ -139,7 +160,8 @@ namespace boost {
|
||||
// The operation type to perform on the given functor/function pointer
|
||||
enum functor_manager_operation_type {
|
||||
clone_functor_tag,
|
||||
destroy_functor_tag
|
||||
destroy_functor_tag,
|
||||
check_functor_type_tag
|
||||
};
|
||||
|
||||
// Tags used to decide between different types of functions
|
||||
@ -172,14 +194,31 @@ namespace boost {
|
||||
|
||||
// The trivial manager does nothing but return the same pointer (if we
|
||||
// are cloning) or return the null pointer (if we are deleting).
|
||||
inline any_pointer trivial_manager(any_pointer f,
|
||||
functor_manager_operation_type op)
|
||||
template<typename F>
|
||||
struct trivial_manager
|
||||
{
|
||||
if (op == clone_functor_tag)
|
||||
return f;
|
||||
else
|
||||
static inline any_pointer
|
||||
get(any_pointer f, functor_manager_operation_type op)
|
||||
{
|
||||
switch (op) {
|
||||
case clone_functor_tag: return f;
|
||||
|
||||
case destroy_functor_tag:
|
||||
return make_any_pointer(reinterpret_cast<void*>(0));
|
||||
|
||||
case check_functor_type_tag:
|
||||
{
|
||||
std::type_info* t = static_cast<std::type_info*>(f.obj_ptr);
|
||||
return BOOST_FUNCTION_COMPARE_TYPE_ID(typeid(F), *t)?
|
||||
f
|
||||
: make_any_pointer(reinterpret_cast<void*>(0));
|
||||
}
|
||||
}
|
||||
|
||||
// Clears up a warning with GCC 3.2.3
|
||||
return make_any_pointer(reinterpret_cast<void*>(0));
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* The functor_manager class contains a static function "manage" which
|
||||
@ -264,13 +303,81 @@ namespace boost {
|
||||
static any_pointer
|
||||
manage(any_pointer functor_ptr, functor_manager_operation_type op)
|
||||
{
|
||||
typedef typename get_function_tag<functor_type>::type tag_type;
|
||||
return manager(functor_ptr, op, tag_type());
|
||||
if (op == check_functor_type_tag) {
|
||||
std::type_info* type =
|
||||
static_cast<std::type_info*>(functor_ptr.obj_ptr);
|
||||
return (BOOST_FUNCTION_COMPARE_TYPE_ID(typeid(Functor), *type)?
|
||||
functor_ptr
|
||||
: make_any_pointer(reinterpret_cast<void*>(0)));
|
||||
}
|
||||
else {
|
||||
typedef typename get_function_tag<functor_type>::type tag_type;
|
||||
return manager(functor_ptr, op, tag_type());
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// A type that is only used for comparisons against zero
|
||||
struct useless_clear_type {};
|
||||
|
||||
#ifdef BOOST_NO_SFINAE
|
||||
// These routines perform comparisons between a Boost.Function
|
||||
// object and an arbitrary function object (when the last
|
||||
// parameter is mpl::bool_<false>) or against zero (when the
|
||||
// last parameter is mpl::bool_<true>). They are only necessary
|
||||
// for compilers that don't support SFINAE.
|
||||
template<typename Function, typename Functor>
|
||||
bool
|
||||
compare_equal(const Function& f, const Functor&, int, mpl::bool_<true>)
|
||||
{ return f.empty(); }
|
||||
|
||||
template<typename Function, typename Functor>
|
||||
bool
|
||||
compare_not_equal(const Function& f, const Functor&, int,
|
||||
mpl::bool_<true>)
|
||||
{ return !f.empty(); }
|
||||
|
||||
template<typename Function, typename Functor>
|
||||
bool
|
||||
compare_equal(const Function& f, const Functor& g, long,
|
||||
mpl::bool_<false>)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return function_equal(*fp, g);
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Function, typename Functor>
|
||||
bool
|
||||
compare_equal(const Function& f, const reference_wrapper<Functor>& g,
|
||||
int, mpl::bool_<false>)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return fp == g.get_pointer();
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Function, typename Functor>
|
||||
bool
|
||||
compare_not_equal(const Function& f, const Functor& g, long,
|
||||
mpl::bool_<false>)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return !function_equal(*fp, g);
|
||||
else return true;
|
||||
}
|
||||
|
||||
template<typename Function, typename Functor>
|
||||
bool
|
||||
compare_not_equal(const Function& f,
|
||||
const reference_wrapper<Functor>& g, int,
|
||||
mpl::bool_<false>)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return fp != g.get_pointer();
|
||||
else return true;
|
||||
}
|
||||
#endif // BOOST_NO_SFINAE
|
||||
} // end namespace function
|
||||
} // end namespace detail
|
||||
|
||||
@ -291,11 +398,92 @@ public:
|
||||
// Is this function empty?
|
||||
bool empty() const { return !manager; }
|
||||
|
||||
template<typename Functor>
|
||||
Functor* target()
|
||||
{
|
||||
if (!manager) return 0;
|
||||
|
||||
detail::function::any_pointer result =
|
||||
manager(detail::function::make_any_pointer(&typeid(Functor)),
|
||||
detail::function::check_functor_type_tag);
|
||||
if (!result.obj_ptr) return 0;
|
||||
else {
|
||||
typedef typename detail::function::get_function_tag<Functor>::type tag;
|
||||
return get_functor_pointer<Functor>(tag(), 0);
|
||||
}
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
const Functor* target() const
|
||||
{
|
||||
if (!manager) return 0;
|
||||
|
||||
detail::function::any_pointer result =
|
||||
manager(detail::function::make_any_pointer(&typeid(Functor)),
|
||||
detail::function::check_functor_type_tag);
|
||||
if (!result.obj_ptr) return 0;
|
||||
else {
|
||||
typedef typename detail::function::get_function_tag<Functor>::type tag;
|
||||
return get_functor_pointer<Functor>(tag(), 0);
|
||||
}
|
||||
}
|
||||
|
||||
template<typename F>
|
||||
bool contains(const F& f) const
|
||||
{
|
||||
if (const F* fp = this->template target<F>()) {
|
||||
return function_equal(*fp, f);
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(__GNUC__) && __GNUC__ == 3 && __GNUC_MINOR__ <= 3
|
||||
// GCC 3.3 and newer cannot copy with the global operator==, due to
|
||||
// problems with instantiation of function return types before it
|
||||
// has been verified that the argument types match up.
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator==(Functor g) const
|
||||
{
|
||||
if (const Functor* fp = target<Functor>())
|
||||
return function_equal(*fp, g);
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator!=(Functor g) const
|
||||
{
|
||||
if (const Functor* fp = target<Functor>())
|
||||
return !function_equal(*fp, g);
|
||||
else return true;
|
||||
}
|
||||
#endif
|
||||
|
||||
public: // should be protected, but GCC 2.95.3 will fail to allow access
|
||||
detail::function::any_pointer (*manager)(
|
||||
detail::function::any_pointer,
|
||||
detail::function::functor_manager_operation_type);
|
||||
detail::function::any_pointer functor;
|
||||
|
||||
private:
|
||||
template<typename Functor>
|
||||
Functor* get_functor_pointer(detail::function::function_ptr_tag, int)
|
||||
{ return reinterpret_cast<Functor*>(&functor.func_ptr); }
|
||||
|
||||
template<typename Functor, typename Tag>
|
||||
Functor* get_functor_pointer(Tag, long)
|
||||
{ return static_cast<Functor*>(functor.obj_ptr); }
|
||||
|
||||
template<typename Functor>
|
||||
const Functor*
|
||||
get_functor_pointer(detail::function::function_ptr_tag, int) const
|
||||
{ return reinterpret_cast<const Functor*>(&functor.func_ptr); }
|
||||
|
||||
template<typename Functor, typename Tag>
|
||||
const Functor* get_functor_pointer(Tag, long) const
|
||||
{ return static_cast<const Functor*>(functor.const_obj_ptr); }
|
||||
};
|
||||
|
||||
/**
|
||||
@ -308,16 +496,7 @@ public:
|
||||
bad_function_call() : std::runtime_error("call to empty boost::function") {}
|
||||
};
|
||||
|
||||
/* Poison comparison between Boost.Function objects (because it is
|
||||
* meaningless). The comparisons would otherwise be allowed because of the
|
||||
* conversion required to allow syntax such as:
|
||||
* boost::function<int, int> f;
|
||||
* if (f) { f(5); }
|
||||
*/
|
||||
void operator==(const function_base&, const function_base&);
|
||||
void operator!=(const function_base&, const function_base&);
|
||||
|
||||
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1310)
|
||||
#ifndef BOOST_NO_SFINAE
|
||||
inline bool operator==(const function_base& f,
|
||||
detail::function::useless_clear_type*)
|
||||
{
|
||||
@ -343,6 +522,116 @@ inline bool operator!=(detail::function::useless_clear_type*,
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef BOOST_NO_SFINAE
|
||||
// Comparisons between boost::function objects and arbitrary function objects
|
||||
template<typename Functor>
|
||||
inline bool operator==(const function_base& f, Functor g)
|
||||
{
|
||||
typedef mpl::bool_<(is_integral<Functor>::value)> integral;
|
||||
return detail::function::compare_equal(f, g, 0, integral());
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
inline bool operator==(Functor g, const function_base& f)
|
||||
{
|
||||
typedef mpl::bool_<(is_integral<Functor>::value)> integral;
|
||||
return detail::function::compare_equal(f, g, 0, integral());
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
inline bool operator!=(const function_base& f, Functor g)
|
||||
{
|
||||
typedef mpl::bool_<(is_integral<Functor>::value)> integral;
|
||||
return detail::function::compare_not_equal(f, g, 0, integral());
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
inline bool operator!=(Functor g, const function_base& f)
|
||||
{
|
||||
typedef mpl::bool_<(is_integral<Functor>::value)> integral;
|
||||
return detail::function::compare_not_equal(f, g, 0, integral());
|
||||
}
|
||||
#else
|
||||
|
||||
# if !(defined(__GNUC__) && __GNUC__ == 3 && __GNUC_MINOR__ <= 3)
|
||||
// Comparisons between boost::function objects and arbitrary function
|
||||
// objects. GCC 3.3 and before has an obnoxious bug that prevents this
|
||||
// from working.
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator==(const function_base& f, Functor g)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return function_equal(*fp, g);
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator==(Functor g, const function_base& f)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return function_equal(g, *fp);
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator!=(const function_base& f, Functor g)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return !function_equal(*fp, g);
|
||||
else return true;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator!=(Functor g, const function_base& f)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return !function_equal(g, *fp);
|
||||
else return true;
|
||||
}
|
||||
# endif
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator==(const function_base& f, reference_wrapper<Functor> g)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return fp == g.get_pointer();
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator==(reference_wrapper<Functor> g, const function_base& f)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return g.get_pointer() == fp;
|
||||
else return false;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator!=(const function_base& f, reference_wrapper<Functor> g)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return fp != g.get_pointer();
|
||||
else return true;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool)
|
||||
operator!=(reference_wrapper<Functor> g, const function_base& f)
|
||||
{
|
||||
if (const Functor* fp = f.template target<Functor>())
|
||||
return g.get_pointer() != fp;
|
||||
else return true;
|
||||
}
|
||||
|
||||
#endif // Compiler supporting SFINAE
|
||||
|
||||
namespace detail {
|
||||
namespace function {
|
||||
inline bool has_empty_target(const function_base* f)
|
||||
@ -350,12 +639,22 @@ namespace detail {
|
||||
return f->empty();
|
||||
}
|
||||
|
||||
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1310)
|
||||
inline bool has_empty_target(const void*)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
#else
|
||||
inline bool has_empty_target(...)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
} // end namespace function
|
||||
} // end namespace detail
|
||||
} // end namespace boost
|
||||
|
||||
#undef BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL
|
||||
#undef BOOST_FUNCTION_COMPARE_TYPE_ID
|
||||
|
||||
#endif // BOOST_FUNCTION_BASE_HEADER
|
||||
|
||||
@ -307,6 +307,9 @@ namespace boost {
|
||||
|
||||
~BOOST_FUNCTION_FUNCTION() { clear(); }
|
||||
|
||||
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
|
||||
// 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())
|
||||
@ -322,6 +325,9 @@ namespace boost {
|
||||
return result;
|
||||
#endif // BOOST_NO_VOID_RETURNS
|
||||
}
|
||||
#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
|
||||
@ -438,9 +444,9 @@ namespace boost {
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
>::type
|
||||
invoker_type;
|
||||
actual_invoker_type;
|
||||
|
||||
invoker = &invoker_type::invoke;
|
||||
invoker = &actual_invoker_type::invoke;
|
||||
this->manager =
|
||||
&detail::function::functor_manager<FunctionPtr, Allocator>::manage;
|
||||
this->functor =
|
||||
@ -471,16 +477,16 @@ namespace boost {
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
>::type
|
||||
invoker_type;
|
||||
actual_invoker_type;
|
||||
|
||||
invoker = &invoker_type::invoke;
|
||||
invoker = &actual_invoker_type::invoke;
|
||||
this->manager = &detail::function::functor_manager<
|
||||
FunctionObj, Allocator>::manage;
|
||||
#ifndef BOOST_NO_STD_ALLOCATOR
|
||||
typedef typename Allocator::template rebind<FunctionObj>::other
|
||||
allocator_type;
|
||||
typedef typename allocator_type::pointer pointer_type;
|
||||
allocator_type allocator;
|
||||
rebound_allocator_type;
|
||||
typedef typename rebound_allocator_type::pointer pointer_type;
|
||||
rebound_allocator_type allocator;
|
||||
pointer_type copy = allocator.allocate(1);
|
||||
allocator.construct(copy, f);
|
||||
|
||||
@ -505,10 +511,10 @@ namespace boost {
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
>::type
|
||||
invoker_type;
|
||||
actual_invoker_type;
|
||||
|
||||
invoker = &invoker_type::invoke;
|
||||
this->manager = &detail::function::trivial_manager;
|
||||
invoker = &actual_invoker_type::invoke;
|
||||
this->manager = &detail::function::trivial_manager<FunctionObj>::get;
|
||||
this->functor =
|
||||
this->manager(
|
||||
detail::function::make_any_pointer(
|
||||
@ -527,9 +533,9 @@ namespace boost {
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
>::type
|
||||
invoker_type;
|
||||
invoker = &invoker_type::invoke;
|
||||
this->manager = &detail::function::trivial_manager;
|
||||
actual_invoker_type;
|
||||
invoker = &actual_invoker_type::invoke;
|
||||
this->manager = &detail::function::trivial_manager<FunctionObj>::get;
|
||||
this->functor = detail::function::make_any_pointer(this);
|
||||
}
|
||||
|
||||
@ -556,6 +562,54 @@ namespace boost {
|
||||
f1.swap(f2);
|
||||
}
|
||||
|
||||
#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
|
||||
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());
|
||||
|
||||
internal_result_type result = invoker(this->functor
|
||||
BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_ARGS);
|
||||
|
||||
# ifndef BOOST_NO_VOID_RETURNS
|
||||
return static_cast<result_type>(result);
|
||||
# else
|
||||
return result;
|
||||
# endif // BOOST_NO_VOID_RETURNS
|
||||
}
|
||||
#endif
|
||||
|
||||
// Poison comparisons between boost::function objects of the same type.
|
||||
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 ,
|
||||
Allocator>&,
|
||||
const BOOST_FUNCTION_FUNCTION<
|
||||
R BOOST_FUNCTION_COMMA
|
||||
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 ,
|
||||
Allocator>&,
|
||||
const BOOST_FUNCTION_FUNCTION<
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS ,
|
||||
Allocator>&);
|
||||
|
||||
#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX)
|
||||
|
||||
#if BOOST_FUNCTION_NUM_ARGS == 0
|
||||
|
||||
24
include/boost/function_equal.hpp
Normal file
24
include/boost/function_equal.hpp
Normal file
@ -0,0 +1,24 @@
|
||||
// Copyright Doug Gregor 2004. 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_EQUAL_HPP
|
||||
#define BOOST_FUNCTION_EQUAL_HPP
|
||||
|
||||
namespace boost {
|
||||
|
||||
namespace detail {
|
||||
template<typename F, typename G>
|
||||
bool function_equal_impl(const F& f, const G& g, long)
|
||||
{ return f == g; }
|
||||
} // end namespace boost::function
|
||||
|
||||
template<typename F, typename G>
|
||||
bool function_equal(const F& f, const G& g)
|
||||
{ return ::boost::detail::function_equal_impl(f, g, 0); }
|
||||
|
||||
} // end namespace boost
|
||||
|
||||
#endif // BOOST_FUNCTION_EQUAL_HPP
|
||||
@ -1,9 +0,0 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0; URL=../../doc/html/function.html">
|
||||
</head>
|
||||
<body>
|
||||
Automatic redirection failed, please go to
|
||||
<a href="../../doc/html/function.html">../../doc/html/function.html</a>
|
||||
</body>
|
||||
</html>
|
||||
65
test/Jamfile
65
test/Jamfile
@ -1,65 +0,0 @@
|
||||
# Function library
|
||||
|
||||
# Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
# 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/
|
||||
|
||||
|
||||
# Testing Jamfile autogenerated from XML source
|
||||
subproject libs/function/test ;
|
||||
|
||||
# bring in rules for testing
|
||||
SEARCH on testing.jam = $(BOOST_BUILD_PATH) ;
|
||||
include testing.jam ;
|
||||
|
||||
# Make tests run by default.
|
||||
DEPENDS all : test ;
|
||||
|
||||
{
|
||||
# look in BOOST_ROOT for sources first, just in this Jamfile
|
||||
local SEARCH_SOURCE = $(BOOST_ROOT) $(SEARCH_SOURCE) ;
|
||||
|
||||
test-suite function
|
||||
:
|
||||
[ run libs/function/test/function_test.cpp : : : : lib_function_test ]
|
||||
|
||||
[ run libs/function/test/function_n_test.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/allocator_test.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/stateless_test.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/lambda_test.cpp : : : : ]
|
||||
|
||||
[ compile-fail libs/function/test/function_test_fail1.cpp : : : : ]
|
||||
|
||||
[ compile-fail libs/function/test/function_test_fail2.cpp : : : : ]
|
||||
|
||||
[ compile libs/function/test/function_30.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_arith_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_arith_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/sum_avg_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/sum_avg_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/mem_fun_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/mem_fun_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/std_bind_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/std_bind_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_ref_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_ref_portable.cpp : : : : ]
|
||||
;
|
||||
}
|
||||
|
||||
@ -1,58 +0,0 @@
|
||||
# Function library
|
||||
|
||||
# Copyright Doug Gregor 2001-2003. 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/
|
||||
|
||||
project
|
||||
: source-location $(BOOST_ROOT)
|
||||
;
|
||||
|
||||
# bring in rules for testing
|
||||
import testing ;
|
||||
|
||||
{
|
||||
|
||||
test-suite function
|
||||
:
|
||||
[ run libs/function/test/function_test.cpp : : : : lib_function_test ]
|
||||
|
||||
[ run libs/function/test/function_n_test.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/allocator_test.cpp ../../../libs/test/build//boost_test_exec_monitor : : : : ]
|
||||
|
||||
[ run libs/function/test/stateless_test.cpp ../../../libs/test/build//boost_test_exec_monitor : : : : ]
|
||||
|
||||
[ run libs/function/test/lambda_test.cpp ../../../libs/test/build//boost_test_exec_monitor : : : : ]
|
||||
|
||||
[ compile-fail libs/function/test/function_test_fail1.cpp : : : : ]
|
||||
|
||||
[ compile-fail libs/function/test/function_test_fail2.cpp : : : : ]
|
||||
|
||||
[ compile libs/function/test/function_30.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_arith_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_arith_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/sum_avg_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/sum_avg_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/mem_fun_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/mem_fun_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/std_bind_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/std_bind_portable.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_ref_cxx98.cpp : : : : ]
|
||||
|
||||
[ run libs/function/test/function_ref_portable.cpp : : : : ]
|
||||
;
|
||||
}
|
||||
|
||||
@ -1,81 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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 <cassert>
|
||||
#include <functional>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
using namespace std;
|
||||
using namespace boost;
|
||||
|
||||
static int alloc_count = 0;
|
||||
static int dealloc_count = 0;
|
||||
|
||||
template<typename T>
|
||||
struct counting_allocator : public std::allocator<T>
|
||||
{
|
||||
template<typename U>
|
||||
struct rebind
|
||||
{
|
||||
typedef counting_allocator<U> other;
|
||||
};
|
||||
|
||||
|
||||
T* allocate(std::size_t n)
|
||||
{
|
||||
alloc_count++;
|
||||
return std::allocator<T>::allocate(n);
|
||||
}
|
||||
|
||||
void deallocate(T* p, std::size_t n)
|
||||
{
|
||||
dealloc_count++;
|
||||
std::allocator<T>::deallocate(p, n);
|
||||
}
|
||||
};
|
||||
|
||||
static int do_minus(int x, int y) { return x-y; }
|
||||
|
||||
struct DoNothing
|
||||
{
|
||||
void operator()() const {}
|
||||
};
|
||||
|
||||
static void do_nothing() {}
|
||||
|
||||
int
|
||||
test_main(int, char*[])
|
||||
{
|
||||
function2<int, int, int, counting_allocator<int> > f;
|
||||
f = plus<int>();
|
||||
f.clear();
|
||||
BOOST_TEST(alloc_count == 1);
|
||||
BOOST_TEST(dealloc_count == 1);
|
||||
|
||||
alloc_count = 0;
|
||||
dealloc_count = 0;
|
||||
f = &do_minus;
|
||||
f.clear();
|
||||
|
||||
function0<void, counting_allocator<int> > fv;
|
||||
alloc_count = 0;
|
||||
dealloc_count = 0;
|
||||
fv = DoNothing();
|
||||
fv.clear();
|
||||
BOOST_TEST(alloc_count == 1);
|
||||
BOOST_TEST(dealloc_count == 1);
|
||||
|
||||
alloc_count = 0;
|
||||
dealloc_count = 0;
|
||||
fv = &do_nothing;
|
||||
fv.clear();
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,25 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2002-2003. 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
|
||||
|
||||
// Make sure we don't try to redefine function2
|
||||
#include <boost/function/function2.hpp>
|
||||
|
||||
// Define all Boost.Function class templates up to 30 arguments
|
||||
#define BOOST_FUNCTION_MAX_ARGS 30
|
||||
#include <boost/function.hpp>
|
||||
|
||||
int main()
|
||||
{
|
||||
boost::function0<float> f0;
|
||||
|
||||
boost::function30<float, int, int, int, int, int, int, int, int, int, int,
|
||||
int, int, int, int, int, int, int, int, int, int,
|
||||
int, int, int, int, int, int, int, int, int, int> f30;
|
||||
return 0;
|
||||
}
|
||||
@ -1,34 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
|
||||
|
||||
float mul_ints(int x, int y) { return ((float)x) * y; }
|
||||
struct int_div {
|
||||
float operator()(int x, int y) const { return ((float)x)/y; };
|
||||
};
|
||||
|
||||
int main()
|
||||
{
|
||||
boost::function<float (int x, int y)> f;
|
||||
f = int_div();
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
if (f)
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
else
|
||||
std::cout << "f has no target, so it is unsafe to call" << std::endl;
|
||||
f = 0;
|
||||
f = &mul_ints;
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,32 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
|
||||
float mul_ints(int x, int y) { return ((float)x) * y; }
|
||||
struct int_div {
|
||||
float operator()(int x, int y) const { return ((float)x)/y; };
|
||||
};
|
||||
int main()
|
||||
{
|
||||
boost::function2<float, int, int> f;
|
||||
f = int_div();
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
if (f)
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
else
|
||||
std::cout << "f has no target, so it is unsafe to call" << std::endl;
|
||||
f = 0;
|
||||
f = &mul_ints;
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,648 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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>
|
||||
#include <functional>
|
||||
#include <cassert>
|
||||
#include <string>
|
||||
|
||||
using namespace boost;
|
||||
using std::string;
|
||||
using std::negate;
|
||||
|
||||
int global_int;
|
||||
|
||||
struct write_five_obj { void operator()() const { global_int = 5; } };
|
||||
struct write_three_obj { int operator()() const { global_int = 3; return 7; }};
|
||||
static void write_five() { global_int = 5; }
|
||||
static void write_three() { global_int = 3; }
|
||||
struct generate_five_obj { int operator()() const { return 5; } };
|
||||
struct generate_three_obj { int operator()() const { return 3; } };
|
||||
static int generate_five() { return 5; }
|
||||
static int generate_three() { return 3; }
|
||||
static string identity_str(const string& s) { return s; }
|
||||
static string string_cat(const string& s1, const string& s2) { return s1+s2; }
|
||||
static int sum_ints(int x, int y) { return x+y; }
|
||||
|
||||
struct write_const_1_nonconst_2
|
||||
{
|
||||
void operator()() { global_int = 2; }
|
||||
void operator()() const { global_int = 1; }
|
||||
};
|
||||
|
||||
struct add_to_obj
|
||||
{
|
||||
add_to_obj(int v) : value(v) {}
|
||||
|
||||
int operator()(int x) const { return value + x; }
|
||||
|
||||
int value;
|
||||
};
|
||||
|
||||
static void
|
||||
test_zero_args()
|
||||
{
|
||||
typedef function0<void> func_void_type;
|
||||
|
||||
write_five_obj five = write_five_obj(); // Initialization for Borland C++ 5.5
|
||||
write_three_obj three = write_three_obj(); // Ditto
|
||||
|
||||
// Default construction
|
||||
func_void_type v1;
|
||||
BOOST_TEST(v1.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v1 = five;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v1.clear();
|
||||
BOOST_TEST(!v1);
|
||||
|
||||
// Assignment to an empty function
|
||||
v1 = three;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation and self-assignment
|
||||
global_int = 0;
|
||||
v1 = v1;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v1 = five;
|
||||
|
||||
// Invocation and self-assignment
|
||||
global_int = 0;
|
||||
v1 = (v1);
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear
|
||||
v1 = 0;
|
||||
BOOST_TEST(v1.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v1 = &write_five;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v1 = &write_three;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v1 = five;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v1 = write_three;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Construction from another function (that is empty)
|
||||
v1.clear();
|
||||
func_void_type v2(v1);
|
||||
BOOST_TEST(!v2? true : false);
|
||||
|
||||
// Assignment to an empty function
|
||||
v2 = three;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v2 = (five);
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
v2.clear();
|
||||
BOOST_TEST(v2.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v2 = (&write_five);
|
||||
BOOST_TEST(v2? true : false);
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v2 = &write_three;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Swapping
|
||||
v1 = five;
|
||||
swap(v1, v2);
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
swap(v1, v2);
|
||||
v1.clear();
|
||||
|
||||
// Assignment
|
||||
v2 = five;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v2 = &write_three;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a function from an empty function
|
||||
v2 = v1;
|
||||
BOOST_TEST(v2.empty());
|
||||
|
||||
// Assignment to a function from a function with a functor
|
||||
v1 = three;
|
||||
v2 = v1;
|
||||
BOOST_TEST(!v1.empty());
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assign to a function from a function with a function
|
||||
v2 = &write_five;
|
||||
v1 = v2;
|
||||
BOOST_TEST(!v1.empty());
|
||||
BOOST_TEST(!v2.empty());
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construct a function given another function containing a function
|
||||
func_void_type v3(v1);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v3.clear();
|
||||
BOOST_TEST(!v3? true : false);
|
||||
|
||||
// Assignment to an empty function
|
||||
v3 = three;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v3 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v3.clear();
|
||||
BOOST_TEST(v3.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v3 = &write_five;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v3 = &write_three;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v3 = five;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construction of a function from a function containing a functor
|
||||
func_void_type v4(v3);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v4.clear();
|
||||
BOOST_TEST(v4.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v4 = three;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v4 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v4.clear();
|
||||
BOOST_TEST(v4.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v4 = &write_five;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v4 = &write_three;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v4 = five;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construction of a function from a functor
|
||||
func_void_type v5(five);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v5.clear();
|
||||
BOOST_TEST(v5.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v5 = three;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v5 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v5.clear();
|
||||
BOOST_TEST(v5.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v5 = &write_five;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v5 = &write_three;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v5 = five;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construction of a function from a function
|
||||
func_void_type v6(&write_five);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v6.clear();
|
||||
BOOST_TEST(v6.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v6 = three;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v6 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v6.clear();
|
||||
BOOST_TEST(v6.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v6 = &write_five;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v6 = &write_three;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v6 = five;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Const vs. non-const
|
||||
// Initialization for Borland C++ 5.5
|
||||
write_const_1_nonconst_2 one_or_two = write_const_1_nonconst_2();
|
||||
const function0<void> v7(one_or_two);
|
||||
function0<void> v8(one_or_two);
|
||||
|
||||
global_int = 0;
|
||||
v7();
|
||||
BOOST_TEST(global_int == 2);
|
||||
|
||||
global_int = 0;
|
||||
v8();
|
||||
BOOST_TEST(global_int == 2);
|
||||
|
||||
// Test construction from 0 and comparison to 0
|
||||
func_void_type v9(0);
|
||||
BOOST_TEST(v9 == 0);
|
||||
# if !defined(__SUNPRO_CC) || __SUNPRO_CC > 0x540 || defined(BOOST_STRICT_CONFIG)
|
||||
BOOST_TEST(0 == v9);
|
||||
#else
|
||||
BOOST_TEST(v9.empty());
|
||||
#endif
|
||||
|
||||
// Test return values
|
||||
typedef function0<int> func_int_type;
|
||||
// Initialization for Borland C++ 5.5
|
||||
generate_five_obj gen_five = generate_five_obj();
|
||||
generate_three_obj gen_three = generate_three_obj();
|
||||
func_int_type i0(gen_five);
|
||||
|
||||
BOOST_TEST(i0() == 5);
|
||||
i0 = gen_three;
|
||||
BOOST_TEST(i0() == 3);
|
||||
i0 = &generate_five;
|
||||
BOOST_TEST(i0() == 5);
|
||||
i0 = &generate_three;
|
||||
BOOST_TEST(i0() == 3);
|
||||
BOOST_TEST(i0? true : false);
|
||||
i0.clear();
|
||||
BOOST_TEST(!i0? true : false);
|
||||
|
||||
// Test return values with compatible types
|
||||
typedef function0<long> func_long_type;
|
||||
func_long_type i1(gen_five);
|
||||
|
||||
BOOST_TEST(i1() == 5);
|
||||
i1 = gen_three;
|
||||
BOOST_TEST(i1() == 3);
|
||||
i1 = &generate_five;
|
||||
BOOST_TEST(i1() == 5);
|
||||
i1 = &generate_three;
|
||||
BOOST_TEST(i1() == 3);
|
||||
BOOST_TEST(i1? true : false);
|
||||
i1.clear();
|
||||
BOOST_TEST(!i1? true : false);
|
||||
}
|
||||
|
||||
static void
|
||||
test_one_arg()
|
||||
{
|
||||
negate<int> neg = negate<int>(); // Initialization for Borland C++ 5.5
|
||||
|
||||
function1<int, int> f1(neg);
|
||||
BOOST_TEST(f1(5) == -5);
|
||||
|
||||
function1<string, string> id(&identity_str);
|
||||
BOOST_TEST(id("str") == "str");
|
||||
|
||||
function1<std::string, const char*> id2(&identity_str);
|
||||
BOOST_TEST(id2("foo") == "foo");
|
||||
|
||||
add_to_obj add_to(5);
|
||||
function1<int, int> f2(add_to);
|
||||
BOOST_TEST(f2(3) == 8);
|
||||
|
||||
const function1<int, int> cf2(add_to);
|
||||
BOOST_TEST(cf2(3) == 8);
|
||||
}
|
||||
|
||||
static void
|
||||
test_two_args()
|
||||
{
|
||||
function2<string, const string&, const string&> cat(&string_cat);
|
||||
BOOST_TEST(cat("str", "ing") == "string");
|
||||
|
||||
function2<int, short, short> sum(&sum_ints);
|
||||
BOOST_TEST(sum(2, 3) == 5);
|
||||
}
|
||||
|
||||
static void
|
||||
test_emptiness()
|
||||
{
|
||||
function0<float> f1;
|
||||
BOOST_TEST(f1.empty());
|
||||
|
||||
function0<float> f2;
|
||||
f2 = f1;
|
||||
BOOST_TEST(f2.empty());
|
||||
|
||||
function0<double> f3;
|
||||
f3 = f2;
|
||||
BOOST_TEST(f3.empty());
|
||||
}
|
||||
|
||||
struct X {
|
||||
X(int v) : value(v) {}
|
||||
|
||||
int twice() const { return 2*value; }
|
||||
int plus(int v) { return value + v; }
|
||||
|
||||
int value;
|
||||
};
|
||||
|
||||
static void
|
||||
test_member_functions()
|
||||
{
|
||||
|
||||
boost::function1<int, X*> f1(&X::twice);
|
||||
|
||||
X one(1);
|
||||
X five(5);
|
||||
|
||||
BOOST_TEST(f1(&one) == 2);
|
||||
BOOST_TEST(f1(&five) == 10);
|
||||
|
||||
boost::function1<int, X*> f1_2;
|
||||
f1_2 = &X::twice;
|
||||
|
||||
BOOST_TEST(f1_2(&one) == 2);
|
||||
BOOST_TEST(f1_2(&five) == 10);
|
||||
|
||||
boost::function2<int, X&, int> f2(&X::plus);
|
||||
BOOST_TEST(f2(one, 3) == 4);
|
||||
BOOST_TEST(f2(five, 4) == 9);
|
||||
}
|
||||
|
||||
struct add_with_throw_on_copy {
|
||||
int operator()(int x, int y) const { return x+y; }
|
||||
|
||||
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");
|
||||
}
|
||||
|
||||
add_with_throw_on_copy& operator=(const add_with_throw_on_copy&)
|
||||
{
|
||||
throw std::runtime_error("But this CAN'T throw");
|
||||
}
|
||||
};
|
||||
|
||||
static void
|
||||
test_ref()
|
||||
{
|
||||
add_with_throw_on_copy atc;
|
||||
try {
|
||||
boost::function2<int, int, int> f(ref(atc));
|
||||
BOOST_TEST(f(1, 3) == 4);
|
||||
}
|
||||
catch(std::runtime_error e) {
|
||||
BOOST_ERROR("Nonthrowing constructor threw an exception");
|
||||
}
|
||||
}
|
||||
|
||||
int test_main(int, char* [])
|
||||
{
|
||||
test_zero_args();
|
||||
test_one_arg();
|
||||
test_two_args();
|
||||
test_emptiness();
|
||||
test_member_functions();
|
||||
test_ref();
|
||||
return 0;
|
||||
}
|
||||
@ -1,27 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
|
||||
|
||||
struct stateful_type { int operator()(int) const { return 0; } };
|
||||
|
||||
int main()
|
||||
{
|
||||
stateful_type a_function_object;
|
||||
boost::function<int (int)> f;
|
||||
f = boost::ref(a_function_object);
|
||||
|
||||
boost::function<int (int)> f2(f);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,27 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
|
||||
|
||||
struct stateful_type { int operator()(int) const { return 0; } };
|
||||
|
||||
int main()
|
||||
{
|
||||
stateful_type a_function_object;
|
||||
boost::function1<int, int> f;
|
||||
f = boost::ref(a_function_object);
|
||||
|
||||
boost::function1<int, int> f2(f);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,748 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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>
|
||||
#include <functional>
|
||||
#include <cassert>
|
||||
#include <string>
|
||||
#include <utility>
|
||||
|
||||
using namespace boost;
|
||||
using namespace std;
|
||||
|
||||
int global_int;
|
||||
|
||||
struct write_five_obj { void operator()() const { global_int = 5; } };
|
||||
struct write_three_obj { int operator()() const { global_int = 3; return 7; }};
|
||||
static void write_five() { global_int = 5; }
|
||||
static void write_three() { global_int = 3; }
|
||||
struct generate_five_obj { int operator()() const { return 5; } };
|
||||
struct generate_three_obj { int operator()() const { return 3; } };
|
||||
static int generate_five() { return 5; }
|
||||
static int generate_three() { return 3; }
|
||||
static string identity_str(const string& s) { return s; }
|
||||
static string string_cat(const string& s1, const string& s2) { return s1+s2; }
|
||||
static int sum_ints(int x, int y) { return x+y; }
|
||||
|
||||
struct write_const_1_nonconst_2
|
||||
{
|
||||
void operator()() { global_int = 2; }
|
||||
void operator()() const { global_int = 1; }
|
||||
};
|
||||
|
||||
struct add_to_obj
|
||||
{
|
||||
add_to_obj(int v) : value(v) {}
|
||||
|
||||
int operator()(int x) const { return value + x; }
|
||||
|
||||
int value;
|
||||
};
|
||||
|
||||
static void
|
||||
test_zero_args()
|
||||
{
|
||||
typedef function<void ()> func_void_type;
|
||||
|
||||
write_five_obj five;
|
||||
write_three_obj three;
|
||||
|
||||
// Default construction
|
||||
func_void_type v1;
|
||||
BOOST_TEST(v1.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v1 = five;
|
||||
BOOST_TEST(v1 != 0);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v1.clear();
|
||||
BOOST_TEST(v1 == 0);
|
||||
|
||||
// Assignment to an empty function
|
||||
v1 = three;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation and self-assignment
|
||||
global_int = 0;
|
||||
v1 = v1;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v1 = five;
|
||||
|
||||
// Invocation and self-assignment
|
||||
global_int = 0;
|
||||
v1 = (v1);
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear
|
||||
v1 = 0;
|
||||
BOOST_TEST(0 == v1);
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v1 = BOOST_FUNCTION_TARGET_FIX(&) write_five;
|
||||
BOOST_TEST(0 != v1);
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v1 = BOOST_FUNCTION_TARGET_FIX(&) write_three;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v1 = five;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v1 = &write_three;
|
||||
BOOST_TEST(!v1.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Construction from another function (that is empty)
|
||||
v1.clear();
|
||||
func_void_type v2(v1);
|
||||
BOOST_TEST(!v2? true : false);
|
||||
|
||||
// Assignment to an empty function
|
||||
v2 = three;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v2 = (five);
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
v2.clear();
|
||||
BOOST_TEST(v2.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v2 = (BOOST_FUNCTION_TARGET_FIX(&) write_five);
|
||||
BOOST_TEST(v2? true : false);
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v2 = BOOST_FUNCTION_TARGET_FIX(&) write_three;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Swapping
|
||||
v1 = five;
|
||||
swap(v1, v2);
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
swap(v1, v2);
|
||||
v1.clear();
|
||||
|
||||
// Assignment
|
||||
v2 = five;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v2 = &write_three;
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a function from an empty function
|
||||
v2 = v1;
|
||||
BOOST_TEST(v2.empty());
|
||||
|
||||
// Assignment to a function from a function with a functor
|
||||
v1 = three;
|
||||
v2 = v1;
|
||||
BOOST_TEST(!v1.empty());
|
||||
BOOST_TEST(!v2.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 3);
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assign to a function from a function with a function
|
||||
v2 = BOOST_FUNCTION_TARGET_FIX(&) write_five;
|
||||
v1 = v2;
|
||||
BOOST_TEST(!v1.empty());
|
||||
BOOST_TEST(!v2.empty());
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
global_int = 0;
|
||||
v2();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construct a function given another function containing a function
|
||||
func_void_type v3(v1);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v3.clear();
|
||||
BOOST_TEST(!v3? true : false);
|
||||
|
||||
// Assignment to an empty function
|
||||
v3 = three;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v3 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v3.clear();
|
||||
BOOST_TEST(v3.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v3 = &write_five;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v3 = &write_three;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v3 = five;
|
||||
BOOST_TEST(!v3.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v3();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construction of a function from a function containing a functor
|
||||
func_void_type v4(v3);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v4.clear();
|
||||
BOOST_TEST(v4.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v4 = three;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v4 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v4.clear();
|
||||
BOOST_TEST(v4.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v4 = &write_five;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v4 = &write_three;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v4 = five;
|
||||
BOOST_TEST(!v4.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v4();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construction of a function from a functor
|
||||
func_void_type v5(five);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v5.clear();
|
||||
BOOST_TEST(v5.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v5 = three;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v5 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v5.clear();
|
||||
BOOST_TEST(v5.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v5 = &write_five;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v5 = &write_three;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v5 = five;
|
||||
BOOST_TEST(!v5.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v5();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Construction of a function from a function
|
||||
func_void_type v6(&write_five);
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v6.clear();
|
||||
BOOST_TEST(v6.empty());
|
||||
|
||||
// Assignment to an empty function
|
||||
v6 = three;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment to a non-empty function
|
||||
v6 = five;
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v6.clear();
|
||||
BOOST_TEST(v6.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v6 = &write_five;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Assignment to a non-empty function from a free function
|
||||
v6 = &write_three;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 3);
|
||||
|
||||
// Assignment
|
||||
v6 = five;
|
||||
BOOST_TEST(!v6.empty());
|
||||
|
||||
// Invocation
|
||||
global_int = 0;
|
||||
v6();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// Const vs. non-const
|
||||
write_const_1_nonconst_2 one_or_two;
|
||||
const function<void ()> v7(one_or_two);
|
||||
function<void ()> v8(one_or_two);
|
||||
|
||||
global_int = 0;
|
||||
v7();
|
||||
BOOST_TEST(global_int == 2);
|
||||
|
||||
global_int = 0;
|
||||
v8();
|
||||
BOOST_TEST(global_int == 2);
|
||||
|
||||
// Test construction from 0 and comparison to 0
|
||||
func_void_type v9(0);
|
||||
BOOST_TEST(v9 == 0);
|
||||
BOOST_TEST(0 == v9);
|
||||
|
||||
// Test return values
|
||||
typedef function<int ()> func_int_type;
|
||||
generate_five_obj gen_five;
|
||||
generate_three_obj gen_three;
|
||||
|
||||
func_int_type i0(gen_five);
|
||||
|
||||
BOOST_TEST(i0() == 5);
|
||||
i0 = gen_three;
|
||||
BOOST_TEST(i0() == 3);
|
||||
i0 = &generate_five;
|
||||
BOOST_TEST(i0() == 5);
|
||||
i0 = &generate_three;
|
||||
BOOST_TEST(i0() == 3);
|
||||
BOOST_TEST(i0? true : false);
|
||||
i0.clear();
|
||||
BOOST_TEST(!i0? true : false);
|
||||
|
||||
// Test return values with compatible types
|
||||
typedef function<long ()> func_long_type;
|
||||
func_long_type i1(gen_five);
|
||||
|
||||
BOOST_TEST(i1() == 5);
|
||||
i1 = gen_three;
|
||||
BOOST_TEST(i1() == 3);
|
||||
i1 = &generate_five;
|
||||
BOOST_TEST(i1() == 5);
|
||||
i1 = &generate_three;
|
||||
BOOST_TEST(i1() == 3);
|
||||
BOOST_TEST(i1? true : false);
|
||||
i1.clear();
|
||||
BOOST_TEST(!i1? true : false);
|
||||
}
|
||||
|
||||
static void
|
||||
test_one_arg()
|
||||
{
|
||||
negate<int> neg;
|
||||
|
||||
function<int (int)> f1(neg);
|
||||
BOOST_TEST(f1(5) == -5);
|
||||
|
||||
function<string (string)> id(&identity_str);
|
||||
BOOST_TEST(id("str") == "str");
|
||||
|
||||
function<string (const char*)> id2(&identity_str);
|
||||
BOOST_TEST(id2("foo") == "foo");
|
||||
|
||||
add_to_obj add_to(5);
|
||||
function<int (int)> f2(add_to);
|
||||
BOOST_TEST(f2(3) == 8);
|
||||
|
||||
const function<int (int)> cf2(add_to);
|
||||
BOOST_TEST(cf2(3) == 8);
|
||||
}
|
||||
|
||||
static void
|
||||
test_two_args()
|
||||
{
|
||||
function<string (const string&, const string&)> cat(&string_cat);
|
||||
BOOST_TEST(cat("str", "ing") == "string");
|
||||
|
||||
function<int (short, short)> sum(&sum_ints);
|
||||
BOOST_TEST(sum(2, 3) == 5);
|
||||
}
|
||||
|
||||
static void
|
||||
test_emptiness()
|
||||
{
|
||||
function<float ()> f1;
|
||||
BOOST_TEST(f1.empty());
|
||||
|
||||
function<float ()> f2;
|
||||
f2 = f1;
|
||||
BOOST_TEST(f2.empty());
|
||||
|
||||
function<double ()> f3;
|
||||
f3 = f2;
|
||||
BOOST_TEST(f3.empty());
|
||||
}
|
||||
|
||||
struct X {
|
||||
X(int v) : value(v) {}
|
||||
|
||||
int twice() const { return 2*value; }
|
||||
int plus(int v) { return value + v; }
|
||||
|
||||
int value;
|
||||
};
|
||||
|
||||
static void
|
||||
test_member_functions()
|
||||
{
|
||||
boost::function<int (X*)> f1(&X::twice);
|
||||
|
||||
X one(1);
|
||||
X five(5);
|
||||
|
||||
BOOST_TEST(f1(&one) == 2);
|
||||
BOOST_TEST(f1(&five) == 10);
|
||||
|
||||
boost::function<int (X*)> f1_2;
|
||||
f1_2 = &X::twice;
|
||||
|
||||
BOOST_TEST(f1_2(&one) == 2);
|
||||
BOOST_TEST(f1_2(&five) == 10);
|
||||
|
||||
boost::function<int (X&, int)> f2(&X::plus);
|
||||
BOOST_TEST(f2(one, 3) == 4);
|
||||
BOOST_TEST(f2(five, 4) == 9);
|
||||
}
|
||||
|
||||
struct add_with_throw_on_copy {
|
||||
int operator()(int x, int y) const { return x+y; }
|
||||
|
||||
add_with_throw_on_copy() {}
|
||||
|
||||
add_with_throw_on_copy(const add_with_throw_on_copy&)
|
||||
{
|
||||
throw runtime_error("But this CAN'T throw");
|
||||
}
|
||||
|
||||
add_with_throw_on_copy& operator=(const add_with_throw_on_copy&)
|
||||
{
|
||||
throw runtime_error("But this CAN'T throw");
|
||||
}
|
||||
};
|
||||
|
||||
static void
|
||||
test_ref()
|
||||
{
|
||||
add_with_throw_on_copy atc;
|
||||
try {
|
||||
boost::function<int (int, int)> f(ref(atc));
|
||||
BOOST_TEST(f(1, 3) == 4);
|
||||
}
|
||||
catch(runtime_error e) {
|
||||
BOOST_ERROR("Nonthrowing constructor threw an exception");
|
||||
}
|
||||
}
|
||||
|
||||
static int alloc_count = 0;
|
||||
static int dealloc_count = 0;
|
||||
|
||||
template<typename T>
|
||||
struct counting_allocator : public allocator<T>
|
||||
{
|
||||
template<typename U>
|
||||
struct rebind
|
||||
{
|
||||
typedef counting_allocator<U> other;
|
||||
};
|
||||
|
||||
|
||||
T* allocate(size_t n)
|
||||
{
|
||||
alloc_count++;
|
||||
return allocator<T>::allocate(n);
|
||||
}
|
||||
|
||||
void deallocate(T* p, size_t n)
|
||||
{
|
||||
dealloc_count++;
|
||||
allocator<T>::deallocate(p, n);
|
||||
}
|
||||
};
|
||||
|
||||
static int do_minus(int x, int y) { return x-y; }
|
||||
|
||||
struct DoNothing
|
||||
{
|
||||
void operator()() const {}
|
||||
};
|
||||
|
||||
static void do_nothing() {}
|
||||
|
||||
static void test_allocator()
|
||||
{
|
||||
#ifndef BOOST_NO_STD_ALLOCATOR
|
||||
boost::function<int (int, int), counting_allocator<int> > f;
|
||||
f = plus<int>();
|
||||
f.clear();
|
||||
BOOST_TEST(alloc_count == 1);
|
||||
BOOST_TEST(dealloc_count == 1);
|
||||
|
||||
alloc_count = 0;
|
||||
dealloc_count = 0;
|
||||
f = &do_minus;
|
||||
f.clear();
|
||||
|
||||
boost::function<void (), counting_allocator<int> > fv;
|
||||
alloc_count = 0;
|
||||
dealloc_count = 0;
|
||||
fv = DoNothing();
|
||||
fv.clear();
|
||||
BOOST_TEST(alloc_count == 1);
|
||||
BOOST_TEST(dealloc_count == 1);
|
||||
|
||||
alloc_count = 0;
|
||||
dealloc_count = 0;
|
||||
fv = &do_nothing;
|
||||
fv.clear();
|
||||
#endif // ndef BOOST_NO_STD_ALLOCATOR
|
||||
}
|
||||
|
||||
static void test_exception()
|
||||
{
|
||||
boost::function<int (int, int)> f;
|
||||
try {
|
||||
f(5, 4);
|
||||
BOOST_TEST(false);
|
||||
}
|
||||
catch(boost::bad_function_call) {
|
||||
// okay
|
||||
}
|
||||
}
|
||||
|
||||
typedef boost::function< void * (void * reader) > reader_type;
|
||||
typedef std::pair<int, reader_type> mapped_type;
|
||||
|
||||
static void test_implicit()
|
||||
{
|
||||
mapped_type m;
|
||||
m = mapped_type();
|
||||
}
|
||||
|
||||
static void test_call_obj(boost::function<int (int, int)> f)
|
||||
{
|
||||
assert(!f.empty());
|
||||
}
|
||||
|
||||
static void test_call_cref(const boost::function<int (int, int)>& f)
|
||||
{
|
||||
assert(!f.empty());
|
||||
}
|
||||
|
||||
static void test_call()
|
||||
{
|
||||
test_call_obj(std::plus<int>());
|
||||
test_call_cref(std::plus<int>());
|
||||
}
|
||||
|
||||
int test_main(int, char* [])
|
||||
{
|
||||
test_zero_args();
|
||||
test_one_arg();
|
||||
test_two_args();
|
||||
test_emptiness();
|
||||
test_member_functions();
|
||||
test_ref();
|
||||
test_allocator();
|
||||
test_exception();
|
||||
test_implicit();
|
||||
test_call();
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,28 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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>
|
||||
|
||||
using namespace std;
|
||||
using namespace boost;
|
||||
|
||||
int
|
||||
test_main(int, char*[])
|
||||
{
|
||||
function0<int> f1;
|
||||
function0<int> f2;
|
||||
|
||||
if (f1 == f2) {
|
||||
}
|
||||
|
||||
BOOST_CRITICAL_ERROR("This should not have compiled.");
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,27 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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>
|
||||
|
||||
using namespace std;
|
||||
using namespace boost;
|
||||
|
||||
static int bad_fn(float f) { return static_cast<int>(f); }
|
||||
|
||||
int
|
||||
test_main(int, char*[])
|
||||
{
|
||||
function0<int> f1;
|
||||
f1 = bad_fn;
|
||||
|
||||
BOOST_CRITICAL_ERROR("This should not have compiled.");
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,38 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2002-2003. 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 <iostream>
|
||||
#include <cstdlib>
|
||||
|
||||
#include <boost/test/minimal.hpp>
|
||||
#include <boost/lambda/lambda.hpp>
|
||||
#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)
|
||||
{
|
||||
return abs (static_cast<int>((arg2 ? arg1 : 2 * arg1) * arg3));
|
||||
}
|
||||
|
||||
int test_main(int, char*[])
|
||||
{
|
||||
function <unsigned(bool, double)> f1 = bind(func_impl, 15, _1, _2);
|
||||
function <unsigned(double)> f2 = bind(f1, false, _1);
|
||||
function <unsigned()> f3 = bind(f2, 4.0);
|
||||
|
||||
f3();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1,31 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
|
||||
struct X {
|
||||
int foo(int);
|
||||
};
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
boost::function<int (X*, int)> f;
|
||||
|
||||
f = &X::foo;
|
||||
|
||||
X x;
|
||||
f(&x, 5);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,31 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
|
||||
struct X {
|
||||
int foo(int);
|
||||
};
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
boost::function2<int, X*, int> f;
|
||||
|
||||
f = &X::foo;
|
||||
|
||||
X x;
|
||||
f(&x, 5);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,14 +0,0 @@
|
||||
// Boost.Function regression test configuration file
|
||||
|
||||
// From the boost/status directory, run
|
||||
// ./regression --tests ../libs/function/test/regression.cfg -o function.html
|
||||
|
||||
|
||||
run libs/function/test/allocator_test.cpp
|
||||
run libs/function/test/function_n_test.cpp
|
||||
run libs/function/test/function_test.cpp
|
||||
compile-fail libs/function/test/function_test_fail1.cpp
|
||||
compile-fail libs/function/test/function_test_fail2.cpp
|
||||
run libs/function/test/mixin_test.cpp
|
||||
run libs/function/test/policy_test.cpp
|
||||
run libs/function/test/stateless_test.cpp
|
||||
@ -1,40 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright Doug Gregor 2001-2003. 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>
|
||||
#include <stdexcept>
|
||||
|
||||
struct stateless_integer_add {
|
||||
int operator()(int x, int y) const { return x+y; }
|
||||
|
||||
void* operator new(std::size_t, stateless_integer_add*)
|
||||
{
|
||||
throw std::runtime_error("Cannot allocate a stateless_integer_add");
|
||||
}
|
||||
|
||||
void operator delete(void*, stateless_integer_add*) throw()
|
||||
{
|
||||
}
|
||||
};
|
||||
|
||||
namespace boost {
|
||||
template<>
|
||||
struct is_stateless<stateless_integer_add> {
|
||||
BOOST_STATIC_CONSTANT(bool, value = true);
|
||||
};
|
||||
}
|
||||
|
||||
int test_main(int, char*[])
|
||||
{
|
||||
boost::function2<int, int, int> f;
|
||||
f = stateless_integer_add();
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,30 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
|
||||
struct X {
|
||||
int foo(int);
|
||||
};
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
boost::function<int (int)> f;
|
||||
X x;
|
||||
f = std::bind1st(
|
||||
std::mem_fun(&X::foo), &x);
|
||||
f(5); // Call x.foo(5)
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,30 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
|
||||
struct X {
|
||||
int foo(int);
|
||||
};
|
||||
int X::foo(int x) { return -x; }
|
||||
|
||||
int main()
|
||||
{
|
||||
boost::function1<int, int> f;
|
||||
X x;
|
||||
f = std::bind1st(
|
||||
std::mem_fun(&X::foo), &x);
|
||||
f(5); // Call x.foo(5)
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,28 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
|
||||
void do_sum_avg(int values[], int n, int& sum, float& avg)
|
||||
{
|
||||
sum = 0;
|
||||
for (int i = 0; i < n; i++)
|
||||
sum += values[i];
|
||||
avg = (float)sum / n;
|
||||
}
|
||||
int main()
|
||||
{
|
||||
boost::function<void (int values[], int n, int& sum, float& avg)> sum_avg;
|
||||
sum_avg = &do_sum_avg;
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,28 +0,0 @@
|
||||
// Function library
|
||||
|
||||
// Copyright (C) 2001-2003 Douglas Gregor
|
||||
|
||||
// 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.hpp>
|
||||
#include <iostream>
|
||||
|
||||
void do_sum_avg(int values[], int n, int& sum, float& avg)
|
||||
{
|
||||
sum = 0;
|
||||
for (int i = 0; i < n; i++)
|
||||
sum += values[i];
|
||||
avg = (float)sum / n;
|
||||
}
|
||||
int main()
|
||||
{
|
||||
boost::function4<void, int*, int, int&, float&> sum_avg;
|
||||
sum_avg = &do_sum_avg;
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user