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44
doc/faq.html
44
doc/faq.html
@ -1,44 +0,0 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<html>
|
||||
<head>
|
||||
<title>Boost.Function Frequently Asked Questions</title>
|
||||
</head>
|
||||
|
||||
<body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080">
|
||||
<h1><IMG SRC="../../../c++boost.gif" WIDTH="276" HEIGHT="86">boost::function Frequently Asked Questions</h1>
|
||||
|
||||
<h2>Q: I see void pointers; is this [mess] type safe?</h2>
|
||||
<p>Yes, <code>boost::function</code> 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).
|
||||
|
||||
<h2>Q: Why are there workarounds for void returns? C++ allows them!</h2>
|
||||
<p>Void returns are permitted by the C++ standard, as in this code snippet:
|
||||
<pre>
|
||||
void f();
|
||||
void g() { return f(); }
|
||||
</pre>
|
||||
|
||||
<p> One reason for not using void returns is that not all compilers support them. In fact, very few compilers seem to support this trivial feature. Additionally, <code>boost::function</code> is more flexible because it does not use void returns. Consider the following code:
|
||||
<pre>
|
||||
int do_something(int);
|
||||
|
||||
boost::function<void, int> f;
|
||||
f = do_something;
|
||||
</pre>
|
||||
<p> This is a valid usage of <code>boost::function</code> because void returns are not used. With void returns, we would attempting to compile ill-formed code similar to:
|
||||
<pre>
|
||||
int f();
|
||||
void g() { return f(); }
|
||||
</pre>
|
||||
<p> In essence, not using void returns allows <code>boost::function</code> 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.
|
||||
|
||||
<h2>Q: Why (function) cloning? </h2>
|
||||
<p> 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.
|
||||
|
||||
<hr>
|
||||
<address><a href="mailto:gregod@cs.rpi.edu">Doug Gregor</a></address>
|
||||
<!-- Created: Fri Feb 16 09:30:41 EST 2001 -->
|
||||
<!-- hhmts start -->
|
||||
Last modified: Wed Nov 7 15:11:52 EST 2001
|
||||
<!-- hhmts end -->
|
||||
</body>
|
||||
</html>
|
||||
@ -1,299 +0,0 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<html>
|
||||
<head>
|
||||
<title>Boost.Function Reference Manual</title>
|
||||
</head>
|
||||
|
||||
<body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080">
|
||||
|
||||
<h1><IMG SRC="../../../c++boost.gif" WIDTH="276" HEIGHT="86">Boost.Function Reference Manual</h1>
|
||||
|
||||
<h2><a name="header">Header <code><<a href="../../../boost/function.hpp">boost/function.hpp</a>></code> synopsis</a></h2>
|
||||
<p> Here <code><i>MAX_ARGS</i></code> is an implementation-defined constant that defines the maximum number of function arguments supported by Boost.Function and will be at least 10. The <code><i>MAX_ARGS</i></code> constant referred to in this document need not have any direct representation in the library.
|
||||
|
||||
<pre>
|
||||
<b>namespace</b> boost {
|
||||
<b>class</b> <a href="#function_base">function_base</a>
|
||||
{
|
||||
<b>typedef</b> <em>implementation-defined</em> safe_bool;
|
||||
<a href="#empty"><b>bool</b> empty() <b>const</b></a>;
|
||||
<a href="#bool"><b>operator</b> safe_bool() <b>const</b></a>;
|
||||
<a href="#not">safe_bool <b>operator!</b>() <b>const</b></a>;
|
||||
};
|
||||
|
||||
// For <i>N</i> in [0, <i>MAX_ARGS</i>]
|
||||
<b>template</b><<b>typename</b> ResultType,
|
||||
<b>typename</b> Arg1,
|
||||
<b>typename</b> Arg2,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>N</i>,
|
||||
<b>typename</b> Policy = empty_function_policy,
|
||||
<b>typename</b> Mixin = empty_function_mixin,
|
||||
<b>typename</b> Allocator = std::allocator<function_base> >
|
||||
<b>class</b> <a href="#functionN">function<i>N</i></a> : <b>public</b> <a href="#function_base">function_base</a>, <b>public</b> Mixin
|
||||
{
|
||||
<b>typedef</b> ResultType result_type; <em>// <a href="#novoid">[1]</a></em>
|
||||
<b>typedef</b> Policy policy_type;
|
||||
<b>typedef</b> Mixin mixin_type;
|
||||
<b>typedef</b> Allocator allocator_type;
|
||||
|
||||
<b>typedef</b> Arg1 argument_type; <i>// If N == 1</i>
|
||||
|
||||
<b>typedef</b> Arg1 first_argument_type; <i>// If N == 2</i>
|
||||
<b>typedef</b> Arg2 second_argument_type; <i>// If N == 2</i>
|
||||
|
||||
<i>// Construction</i>
|
||||
<a href="#functionN_default"><b>explicit</b> function<i>N</i>(<b>const</b> Mixin<b>&</b> = Mixin())</a>;
|
||||
<a href="#functionN_copy">function<i>N</i>(<b>const</b> function<i>N</i><b>&</b>)</a>;
|
||||
<a href="#functionN_target"><b>template</b><<b>typename</b> F> function<i>N</i>(F, <b>const</b> Mixin<b>&</b> = Mixin())</a>;
|
||||
<a href="#functionN_target_ref"><b>template</b><<b>typename</b> F> function<i>N</i>(reference_wrapper<F>)</a>;
|
||||
|
||||
<i>// Assignment</i>
|
||||
<a href="#functionN_copy_assn">function<i>N</i><b>&</b> <b>operator</b>=(<b>const</b> function<i>N</i><b>&</b>)</a>;
|
||||
<a href="#functionN_target_assn"><b>template</b><<b>typename</b> F> function<i>N</i><b>&</b> <b>operator</b>=(F)</a>;
|
||||
<a href="#functionN_target_ref_assn"><b>template</b><<b>typename</b> F> function<i>N</i><b>&</b> <b>operator</b>=(reference_wrapper<F>)</a>;
|
||||
<a href="#functionN_copy_set"><b>void</b> set(<b>const</b> function<i>N</i><b>&</b>)</a>;
|
||||
<a href="#functionN_target_set"><b>template</b><<b>typename</b> F> <b>void</b> set(F)</a>;
|
||||
<a href="#functionN_swap"><b>void</b> swap(function<i>N</i><b>&</b>)</a>;
|
||||
<a href="#functionN_clear"><b>void</b> clear()</a>;
|
||||
|
||||
<i>// Invocation</i>
|
||||
<a href="#functionN_call_const">result_type <b>operator</b>()(Arg1 a1, Arg2 a2, <i>...</i>, Arg<i>N</i> a<i>N</i>) <b>const</b></a>;
|
||||
};
|
||||
|
||||
<b>template</b><<b>typename</b> ResultType,
|
||||
<b>typename</b> Arg1,
|
||||
<b>typename</b> Arg2,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>N</i>,
|
||||
<b>typename</b> Policy,
|
||||
<b>typename</b> Mixin,
|
||||
<b>typename</b> Allocator>
|
||||
<b>void</b> <a href="#swap_functionN">swap</a>(function<em>N</em><ResultType, Arg1, Arg2, <i>...</i>, Arg<i>N</i>, Policy, Mixin, Allocator><b>&</b>,
|
||||
function<em>N</em><ResultType, Arg1, Arg2, <i>...</i>, Arg<i>N</i>, Policy, Mixin, Allocator><b>&</b>);
|
||||
|
||||
// For any <i>N</i> in [0, <i>MAX_ARGS</i>]
|
||||
<b>template</b><<b>typename</b> ResultType,
|
||||
<b>typename</b> Arg1,
|
||||
<b>typename</b> Arg2,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>N</i>,
|
||||
<b>typename</b> Arg<i>N+1</i> = <i>implementation-defined</i>,
|
||||
<b>typename</b> Arg<i>N+2</i> = <i>implementation-defined</i>,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>MAX_ARGS</i> = <i>implementation-defined</i>>
|
||||
<b>class</b> <a href="#function">function</a> : <b>public</b> <a href="#functionN">function<i>N</i></a><ResultType, Arg1, Arg2, <i>...</i>, Arg<i>N</i>>
|
||||
{
|
||||
<i>// Construction</i>
|
||||
function();
|
||||
function(<b>const</b> function<b>&</b>);
|
||||
function(<b>const</b> function<i>N</i><ResultType, Arg1, Arg2, ..., Arg<i>N</i>><b>&</b>);
|
||||
<b>template</b><<b>typename</b> F> function<i>N</i>(F);
|
||||
|
||||
<i>// Assignment</i>
|
||||
function<b>&</b> <b>operator</b>=(<b>const</b> function<b>&</b>);
|
||||
function<b>&</b> <b>operator</b>=(<b>const</b> function<i>N</i><ResultType, Arg1, Arg2, ..., Arg<i>N</i>><b>&</b>);
|
||||
<b>template</b><<b>typename</b> F> function<b>&</b> <b>operator</b>=(F);
|
||||
<b>void</b> set(<b>const</b> function<b>&</b>);
|
||||
<b>void</b> set(<b>const</b> function<i>N</i><ResultType, Arg1, Arg2, ..., Arg<i>N</i>><b>&</b>);
|
||||
<b>template</b><<b>typename</b> F> <b>void</b> set(F);
|
||||
};
|
||||
|
||||
<b>template</b><<b>typename</b> ResultType,
|
||||
<b>typename</b> Arg1,
|
||||
<b>typename</b> Arg2,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>MAX_ARGS</i>>
|
||||
<b>void</b> <a href="#swap_function">swap</a>(function<ResultType, Arg1, Arg2, <i>...</i>, Arg<i>MAX_ARGS</i>><b>&</b>,
|
||||
function<ResultType, Arg1, Arg2, <i>...</i>, Arg<i>MAX_ARGS</i>><b>&</b>);
|
||||
}
|
||||
</pre>
|
||||
|
||||
<h2>Definitions</h2>
|
||||
<p>
|
||||
<ul>
|
||||
<li><a name="compatible"></a>A function object <code>f</code> is <em>compatible</em> if for the given set of argument types <code>Arg1</code>, <code>Arg2</code>, ..., <code>Arg<em>N</em></code> and a return type <code>ResultType</code>, the appropriate following function is well-formed:
|
||||
<pre>
|
||||
<em>// if ResultType is not <b>void</b></em>
|
||||
ResultType foo(Arg1 arg1, Arg2 arg2, ..., Arg<em>N</em> arg<em>N</em>)
|
||||
{
|
||||
<b>return</b> f(arg1, arg2, ..., arg<em>N</em>);
|
||||
}
|
||||
|
||||
<em>// if ResultType is <b>void</b></em>
|
||||
ResultType foo(Arg1 arg1, Arg2 arg2, ..., Arg<em>N</em> arg<em>N</em>)
|
||||
{
|
||||
f(arg1, arg2, ..., arg<em>N</em>);
|
||||
}
|
||||
</pre>
|
||||
<p> 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, ..., Arg<em>N</em>) <em>cv-quals</em></code> be adapted to a function object with the following function call operator overloads:
|
||||
<pre>
|
||||
<b>template</b><<b>typename P</b>>
|
||||
R <b>operator</b>()(<em>cv-quals</em> P& x, Arg1 arg1, Arg2 arg2, ..., Arg<em>N</em> arg<em>N</em>) <b>const</b>
|
||||
{
|
||||
<b>return</b> (*x).*mf(arg1, arg2, ..., arg<em>N</em>);
|
||||
}
|
||||
</pre>
|
||||
<li><a name="stateless"></a>A function object <code>f</code> of type <code>F</code> is <em>stateless</em> if it is a function pointer or if <a href="../../type_traits/index.htm#properties"><code>boost::is_stateless<T></code></a> 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.</li>
|
||||
</ul>
|
||||
|
||||
<h2><a name="function_base">Class <code>function_base</code></a></h2>
|
||||
<p> Class <code>function_base</code> is the common base class for all Boost.Function objects. Objects of type <code>function_base</code> may not be created directly.
|
||||
|
||||
<p> <a name="empty"><code><b>bool</b> empty() <b>const</b></code></a>
|
||||
<ul>
|
||||
<li><b>Returns</b>: <code>true</code> if the function object has a target, <code>false</code> otherwise.</li>
|
||||
<li><b>Throws</b>: will not throw.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="bool"><code><b>operator</b> safe_bool() <b>const</b></code></a>
|
||||
<ul>
|
||||
<li><b>Returns</b>: <code>safe_bool</code> equivalent of <code>!<a href="#empty">empty</a>()</code></li>
|
||||
<li><b>Throws</b>: will not throw.</li>
|
||||
<li><b>Notes</b>: The <code>safe_bool</code> type can be used in contexts where a <b>bool</b> is expected (e.g., an <b>if</b> condition); however, implicit conversions (e.g., to <b>int</b>) that can occur with <b>bool</b> are not allowed, eliminating some sources of user error.
|
||||
</ul>
|
||||
|
||||
<p> <a name="not"><code>safe_bool <b>operator!</b>() <b>const</b></code></a>
|
||||
<ul>
|
||||
<li><b>Returns</b>: <code>safe_bool</code> equivalent of <code><a href="#empty">empty</a>()</code></li>
|
||||
<li><b>Throws</b>: will not throw.</li>
|
||||
<li><b>Notes</b>: See <a href="#bool"><code>safe_bool</code> conversion</a>
|
||||
</ul>
|
||||
|
||||
<h2><a name="functionN">Class template <code>function<i>N</i></code></a></h2>
|
||||
<p> Class template <code>function<i>N</i></code> is actually a family of related classes <code>function0</code>, <code>function1</code>, etc., up to some implementation-defined maximum. In this context, <code><i>N</i></code> refers to the number of parameters and <code>f</code> refers to the implicit object parameter.
|
||||
|
||||
<p> <a name="functionN_default"><code><b>explicit</b> function<i>N</i>(<b>const</b> Mixin<b>&</b> = Mixin());</code></a>
|
||||
<ul>
|
||||
<li><b>Effects</b>: Constructs the <code>Mixin</code> subobject with the given mixin.</li>
|
||||
<li><b>Postconditions</b>: <code>f.<a href="#empty">empty</a>()</code>.</li>
|
||||
<li><b>Throws</b>: will not throw unless construction of the <code>Mixin</code> subobject throws.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_copy"><code>function<i>N</i>(<b>const</b> function<i>N</i><b>&</b> g);</code></a>
|
||||
<ul>
|
||||
<li><b>Postconditions</b>: <code>f</code> contains a copy of the <code>g</code>'s target, if it has one, or is empty if <code>g.<a href="#empty">empty</a>()</code>. The mixin for the <code>f</code> is copy-constructed from the mixin of <code>g</code>.</li>
|
||||
<li><b>Throws</b>: will not throw unless copying the target of <code>g</code> or construction of the <code>Mixin</code> subobject throws.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_target"><code><b>template</b><<b>typename</b> F> function<i>N</i>(F g, <b>const</b> Mixin<b>&</b> = Mixin());</code></a>
|
||||
<ul>
|
||||
<li><b>Requires</b>: <code>g</code> is a <a href="#compatible">compatible</a> function object.</li>
|
||||
<li><b>Effects</b>: Constructs the <code>Mixin</code> subobject from the given mixin.</li>
|
||||
<li><b>Postconditions</b>: <code>f</code> targets a copy of <code>g</code> if <code>g</code> is nonempty, or <code>f.<a href="#empty">empty</a>()</code> if <code>g</code> is empty.</li>
|
||||
<li><b>Throws</b>: will not throw when <code>g</code> is a <a href="#stateless">stateless</a> function object unless construction of the <code>Mixin</code> subobject throws.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_target_ref"><code><b>template</b><<b>typename</b> F> function<i>N</i>(<a href="../../bind/ref.html">reference_wrapper</a><F> g);</code></a>
|
||||
<ul>
|
||||
<li><b>Requires</b>: <code>g.get()</code> is a <a href="#compatible">compatible</a> function object.</li>
|
||||
<li><b>Effects</b>: Constructs the <code>Mixin</code> subobject from the given mixin.</li>
|
||||
<li><b>Postconditions</b>: <code>this</code> object targets <code>g</code> (<em>not</em> a copy of <code>g.get()</code>) if <code>g.get()</code> is nonempty, or <code>this->empty()</code> if <code>g.get()</code> is empty.</li>
|
||||
<li><b>Throws</b>: will not throw unless the construction of the <code>Mixin</code> subobject throws.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_copy_assn"><code>function<i>N</i><b>&</b> <b>operator</b>=(<b>const</b> function<i>N</i><b>&</b> g);</code></a>
|
||||
<ul>
|
||||
<li><b>Postconditions</b>: <code>f</code> targets a copy of <code>g</code>'s target, if it has one, or is empty if <code>g.<a href="#empty">empty</a>()</code>. The mixin for <code>f</code> is assigned the value of the mixin for <code>g</code>.</li>
|
||||
<li><b>Returns</b>: <code>*this</code>.</li>
|
||||
<li><b>Throws</b>: will not throw when the target of <code>g</code> is a <a href="#stateless">stateless</a> function object or a reference to the function object, unless the copy of the <code>Mixin</code> subobject throws.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_target_assn"><code><b>template</b><<b>typename</b> F> function<i>N</i><b>&</b> <b>operator</b>=(F g);</code></a>
|
||||
<ul>
|
||||
<li><b>Requires</b>: <code>g</code> is a <a href="#compatible">compatible</a> function object.</li>
|
||||
<li><b>Postconditions</b>: <code>f</code> targets a copy of <code>g</code> if <code>g</code> is nonempty, or <code>f.<a href="#empty">empty</a>()</code> if <code>g</code> is empty.</li>
|
||||
<li><b>Returns</b>: <code>*this</code>.</li>
|
||||
<li><b>Throws</b>: will not throw when <code>g</code> is a <a href="#stateless">stateless</a> function object.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_target_ref_assn"><code><b>template</b><<b>typename</b> F> function<i>N</i><b>&</b> <b>operator</b>=(<a href="../../bind/ref.html">reference_wrapper</a><F> g);</code></a>
|
||||
<ul>
|
||||
<li><b>Requires</b>: <code>g.get()</code> is a <a href="#compatible">compatible</a> function object.</li>
|
||||
<li><b>Postconditions</b>: <code>f</code> targets <code>g.get()</code> (not a copy of <code>g.get()</code>) if <code>g.get()</code> is nonempty, or <code>f.<a href="#empty">empty</a>()</code> if <code>g.get()</code> is empty.</li>
|
||||
<li><b>Returns</b>: <code>*this</code>.</li>
|
||||
<li><b>Throws</b>: will throw only if the destruction or deallocation of the target of <code>this</code> throws.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_copy_set"><code><b>void</b> set(<b>const</b> function<i>N</i><b>&</b> g);</code></a>
|
||||
<ul>
|
||||
<li><b>Effects</b>: <code><a href="#functionN_copy_assn">*this = g</a></code>.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_target_set"><code><b>template</b><<b>typename</b> F> <b>void</b> set(F g);</code></a>
|
||||
<ul>
|
||||
<li><b>Effects</b>: <code><a href="#functionN_target_assn">*this = g</a></code>.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_swap"><code><b>void</b> swap(function<i>N</i><b>&</b> g);</code></a>
|
||||
<ul>
|
||||
<li><b>Effects</b>: interchanges the targets of <code>f</code> and <code>g</code> and swaps the mixins of <code>f</code> and <code>g</code>.</li>
|
||||
<li><b>Throws</b>: will not throw.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_clear"><code><b>void</b> clear(); </code></a>
|
||||
<ul>
|
||||
<li><b>Effects</b>: If <code>!<a href="#empty">empty</a>()</code>, deallocates current target.</li>
|
||||
<li><b>Postconditions</b>: <code><a href="#empty">empty</a>()</code>.</li>
|
||||
</ul>
|
||||
|
||||
<p> <a name="functionN_call_const"><code> result_type <b>operator</b>()(Arg1 a1, Arg2 a2, <i>...</i>, Arg<i>N</i> a<i>N</i>) <b>const</b>;</code></a>
|
||||
<ul>
|
||||
<li><b>Requires</b>: <code>!<a href="#empty">empty</a>()</code>.</li>
|
||||
<li><b>Effects</b>: <i>target</i> is the underlying function target. It is not <code><b>const</b></code> or <code><b>volatile</b></code> qualified.
|
||||
<ol>
|
||||
<li><code>policy_type policy;</code></li>
|
||||
<li><code>policy.precall(this);</code></li>
|
||||
<li><code><i>target</i>(a1, a2, <i>...</i>, a<i>N</i>);</code></li>
|
||||
<li><code>policy.postcall(this);</code></li>
|
||||
</ol>
|
||||
<li><b>Returns</b>: the value returned by <i>target</i>.</li>
|
||||
</ul>
|
||||
|
||||
<h2><a name="function">Class template <code>function</code></a></h2>
|
||||
<p> Class template <code>function</code> is a thin wrapper around the numbered class templates <code>function0</code>, <code>function1</code>, etc. It accepts up to <i>MAX_ARGS</i> arguments, but when passed <i>N</i> arguments it will derive from <code>function<i>N</i></code> specialized with the arguments it receives.
|
||||
|
||||
<p> The semantics of all operations in class template <code>function</code> are equivalent to that of the underlying <code>function<i>N</i></code> object, although additional member functions are required to allow proper copy construction and copy assignment of <code>function</code> objects.
|
||||
|
||||
<h2><a name="operations">Operations</a></h2>
|
||||
<p>
|
||||
<pre>
|
||||
<b>template</b><<b>typename</b> ResultType,
|
||||
<b>typename</b> Arg1,
|
||||
<b>typename</b> Arg2,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>N</i>,
|
||||
<b>typename</b> Policy,
|
||||
<b>typename</b> Mixin,
|
||||
<b>typename</b> Allocator>
|
||||
<b>void</b> <a name="swap_functionN">swap</a>(function<i>N</i><ResultType, Arg1, Arg2, <i>...</i>, Arg<i>N</i>, Policy, Mixin, Allocator><b>&</b> f,
|
||||
function<i>N</i><ResultType, Arg1, Arg2, <i>...</i>, Arg<i>N</i>, Policy, Mixin, Allocator><b>&</b> g);
|
||||
</pre>
|
||||
<ul>
|
||||
<li><b>Effects</b>: <code>f.<a href="#functionN_swap">swap</a>(g);</code></li>
|
||||
</ul>
|
||||
|
||||
<p>
|
||||
<pre>
|
||||
<b>template</b><<b>typename</b> ResultType,
|
||||
<b>typename</b> Arg1,
|
||||
<b>typename</b> Arg2,
|
||||
<i>...</i>
|
||||
<b>typename</b> Arg<i>MAX_ARGS</i>>
|
||||
<b>void</b> <a name="swap_function">swap</a>(function<ResultType, Arg1, Arg2, <i>...</i>, Arg<i>MAX_ARGS</i>><b>&</b> f,
|
||||
function<ResultType, Arg1, Arg2, <i>...</i>, Arg<i>MAX_ARGS</i>><b>&</b> g);
|
||||
</pre>
|
||||
<ul>
|
||||
<li><b>Effects</b>: <code>f.<a href="#functionN_swap">swap</a>(g);</code></li>
|
||||
</ul>
|
||||
|
||||
<hr>
|
||||
<p><a name="novoid">[1]</a> On compilers not supporting void returns, when the <code>ReturnType</code> is <b>void</b>, the <code>result_type</code> of a Boost.Function object is implementation-defined.
|
||||
<hr>
|
||||
<address><a href="mailto:gregod@cs.rpi.edu">Douglas Gregor</a></address>
|
||||
<!-- Created: Fri Jul 13 10:57:20 EDT 2001 -->
|
||||
<!-- hhmts start -->
|
||||
Last modified: Thu Jan 31 21:55:35 EST 2002
|
||||
<!-- hhmts end -->
|
||||
</body>
|
||||
</html>
|
||||
@ -1,205 +0,0 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<html>
|
||||
<head>
|
||||
<title>Boost.Function Tutorial</title>
|
||||
</head>
|
||||
|
||||
<body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080">
|
||||
|
||||
<h1><IMG SRC="../../../c++boost.gif" WIDTH="276" HEIGHT="86">Boost.Function Tutorial</h1>
|
||||
|
||||
<h2><a name="usage">Basic usage</a></h2>
|
||||
<p> A function wrapper is defined simply by instantiating the <code>function</code> class template with the desired return type and argument types. 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 <code>f</code> that takes two <code>int</code> parameters and returns a <code>float</code>:
|
||||
<pre>
|
||||
boost::<a href="reference.html#function">function</a><float, int, int> f;
|
||||
</pre>
|
||||
|
||||
<p> By default, function object wrappers are empty, so we can create a
|
||||
function object to assign to <code>f</code>:
|
||||
<pre>
|
||||
struct int_div {
|
||||
float operator()(int x, int y) const { return ((float)x)/y; };
|
||||
};
|
||||
|
||||
f = int_div();
|
||||
</pre>
|
||||
|
||||
<p> Now we can use <code>f</code> to execute the underlying function object
|
||||
<code>int_div</code>:
|
||||
<pre>
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
</pre>
|
||||
|
||||
<p> We are free to assign any compatible function object to <code>f</code>. If <code>int_div</code> had been declared to take two <code>long</code> 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:
|
||||
<pre>
|
||||
boost::function<void, int[], int, int&, float&> 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;
|
||||
}
|
||||
|
||||
sum_avg = &do_sum_avg;
|
||||
</pre>
|
||||
|
||||
<p> 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. We can check for an empty function object wrapper by querying its <code><a href="reference.html#empty">empty</a>()</code> method or, more succinctly, by using it in a boolean context: if it evaluates true, it contains a function object target, i.e.,
|
||||
<pre>
|
||||
if (f)
|
||||
std::cout << f(5, 3) << std::endl;
|
||||
else
|
||||
std::cout << "f has no target, so it is unsafe to call" << std::endl;
|
||||
</pre>
|
||||
|
||||
<p> We can clear out a function target using the <code><a href="reference.html#functionN_clear">clear</a>()</code> member function.
|
||||
|
||||
<h3>Free functions</h3>
|
||||
<p> 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:
|
||||
<pre>
|
||||
float mul_ints(int x, int y) { return ((float)x) * y; }
|
||||
f = &mul_ints;
|
||||
</pre>
|
||||
|
||||
<p> Note that the <code>&</code> isn't really necessary unless you happen to be using Microsoft Visual C++ version 6.
|
||||
|
||||
<h3>Member functions</h3>
|
||||
<a name="member_func">
|
||||
<p> 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:
|
||||
<pre>
|
||||
struct X {
|
||||
int foo(int);
|
||||
};
|
||||
|
||||
boost::function<int, X*, int> f;
|
||||
f = &X::foo;
|
||||
|
||||
X x;
|
||||
f(&x, 5);
|
||||
</pre>
|
||||
<p> Several libraries exist that support argument binding. Three such libraries are summarized below:
|
||||
<ul>
|
||||
<li> <a href="../../bind/bind.html">Boost.Bind</a>. This library allows binding of arguments for any function object. It is lightweight and very portable.</li>
|
||||
|
||||
<li> The C++ Standard library. Using <code>std::bind1st</code> and <code>std::mem_fun</code> together one can bind the object of a pointer-to-member function for use with Boost.Function:
|
||||
<pre>
|
||||
struct X {
|
||||
int foo(int);
|
||||
};
|
||||
|
||||
boost::function<int, int> f;
|
||||
X x;
|
||||
f = std::bind1st(std::mem_fun(&X::foo), &x);
|
||||
|
||||
f(5); // Call x.foo(5)</pre></li>
|
||||
|
||||
<li><a href="http://lambda.cs.utu.fi/">The Lambda library</a>. 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. Note that it is not a Boost library.</li>
|
||||
</ul>
|
||||
|
||||
<h3>References to Functions</h3>
|
||||
<p> 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 <a
|
||||
href="../../bind/ref.html"><code>ref</code></a> and <a
|
||||
href="../../bind/ref.html"><code>cref</code></a> functions to wrap a
|
||||
reference to a function object:
|
||||
|
||||
<pre>
|
||||
stateful_type a_function_object;
|
||||
boost::function<int, int> f;
|
||||
f = ref(a_function_object);
|
||||
|
||||
boost::function<int, int> f2(f);
|
||||
</pre>
|
||||
|
||||
Here, <code>f</code> will not make a copy of
|
||||
<code>a_function_object</code>, nor will <code>f2</code> when it is
|
||||
targeted to <code>f</code>'s reference to
|
||||
<code>a_function_object</code>. Additionally, when using references to
|
||||
function objects, Boost.Function will not throw exceptions during
|
||||
assignment or construction.
|
||||
|
||||
<h2><a name="family">The <code>function</code> family</a></h2>
|
||||
<p> The header <<a href="../../../boost/function.hpp">boost/function.hpp</a>> defines the primary entry point to the function object wrappers, the class template <code>boost::function</code>. This class template is essentially a thin wrapper around a set of similar numbered function object wrappers, <code>boost::function0</code>, <code>boost::function1</code>, etc., where the number indicates the number of arguments passed to the function object target. The declaration of <code>f</code> above could also be written as:
|
||||
<pre>
|
||||
boost::function2<float, int, int> f;
|
||||
</pre>
|
||||
|
||||
<p> The numbered class templates contain most of the implementation and are each distinct class templates. They may be helpful if used in shared libraries, where the number of arguments supported by Boost.Function may change between revisions. Additionally, some compilers (e.g., Microsoft Visual C++ 6.0) have been known to be incapable of compiling <code>boost::function</code> in some instances but are able to handle the numbered variants.
|
||||
|
||||
<h2><a name="advanced">Advanced usage</a></h2>
|
||||
<p> The <code>boost::function</code> family supports additional customization by means of policies, mixins, and allocators. The specific usage of each of these will be explained in later sections, but they share a common problem: how to replace each default with your own version.
|
||||
|
||||
<p> With <code>boost::function</code> it is not so clear, because support for an arbitrary number of parameters means that it is impossible to specify just the last parameter, but not 5 of the parameters in between. Therefore, <code>boost::function</code> doubles as a generative interface for the underlying numbered class templates that uses named template parameters. For instance, to specify both a policy and an allocator for a function object wrapper <code>f</code> taking an <code>int</code> and returning an <code>int</code>, use:
|
||||
<pre>
|
||||
function<int, int>::policy<MyPolicy>::allocator<MyAllocator>::type f;
|
||||
</pre>
|
||||
|
||||
<p> The named template parameters <code>policy</code>, <code>mixin</code> and <code>allocator</code> each take one template parameter (the replacement class) and may be nested as above to generate a function object wrapper. The <code>::type</code> at the end accesses the actual type that fits the given properties.
|
||||
|
||||
<h3><a name="policies">Policies</a></h3>
|
||||
<p> Policies define what happens directly before and directly after an invocation of a function object target is made. A policy must have two member functions, <code>precall</code> and <code>postcall</code>, each of which must be able to accept a <code>const</code> function object wrapper pointer. The following policy will print "before" prior to execution and "after" afterwards:
|
||||
|
||||
<pre>
|
||||
struct print_policy {
|
||||
void precall(const boost::function_base*) { std::cout << "before"; }
|
||||
void postcall(const boost::function_base*) { std::cout << "after"; }
|
||||
};
|
||||
</pre>
|
||||
|
||||
<p> A new instance of the policy class will be created prior to calling the function object target and will be preserved until after the call has returned. Therefore, for any invocation the <code>precall</code> and <code>postcall</code> will be executed on the same policy class instance; however, policy class instances will not be kept between target invocations.
|
||||
|
||||
<p> Policies are further <a href="../../../more/generic_programming.html#policy">described</a> in the Boost discussion on <a href="../../../more/generic_programming.html">generic programming techniques</a>.
|
||||
|
||||
<h3><a name="mixins">Mixins</a></h3>
|
||||
<p> The function object wrappers allow any class to be "mixed in" as a base class. This allows extra members and/or functionality to be included by the user. This can be used, for instance, to overcome the limitations of policies by storing data between invocations in a base class instead of in a <code>static</code> member of a policy class.
|
||||
|
||||
<h3><a name="allocators">Allocators</a></h3>
|
||||
<p> The function object wrappers allow the user to specify a new allocator to handle the cloning of function object targets (when the wrappers are copied). The allocators used are the same as the C++ standard library allocators. The wrappers assume the allocators are stateless, and will create a new instance each time they are used (because they are rebound very often). This shares the semantics of most standard library implementations, and is explicitly allowed by the C++ standard.
|
||||
|
||||
<h3><a name="synchronizing">Example: Synchronized callbacks</a></h3>
|
||||
<p> Synchronization of callbacks in a multithreaded environment is extremely important. Using mixins and policies, a Boost.Function object may implement its own synchronization policy that ensures that only one thread can be in the callback function at any given point in time.
|
||||
|
||||
<p> We will use the prototype Boost.Threads library for its <code>recursive_mutex</code>. Since the mutex is on a per-callback basis, we will add a mutex to the <code>boost::function</code> by mixin it in with this mixin class:
|
||||
<pre>
|
||||
class SynchronizedMixin {
|
||||
mutable boost::recursive_mutex mutex;
|
||||
};
|
||||
</pre>
|
||||
|
||||
<p> Next, we create a policy that obtains a lock before the target is called (via the <code>precall</code> function) and releases the lock after the target has been called (via the <code>postcall</code> function):
|
||||
|
||||
<pre>
|
||||
class SynchronizedPolicy {
|
||||
std::auto_ptr<boost::recursive_mutex::lock> lock;
|
||||
|
||||
void precall(const SynchronizedMixin* f)
|
||||
{
|
||||
lock.reset(new boost::recursive_mutex::lock(f->mutex));
|
||||
}
|
||||
|
||||
void postcall(const SynchronizedMixin* f)
|
||||
{
|
||||
lock.reset();
|
||||
}
|
||||
};
|
||||
</pre>
|
||||
|
||||
<p>The use of <code>std::auto_ptr</code> ensures that the lock will be destroyed (and therefore released) if an exception is thrown by the target function. Now we can use the policy and mixin together to create a synchronized callback:
|
||||
|
||||
<pre>
|
||||
boost::function2<float, int, int, SynchronizedPolicy, SynchronizedMixin> f;
|
||||
</pre>
|
||||
|
||||
<hr>
|
||||
<address><a href="mailto:gregod@cs.rpi.edu">Douglas Gregor</a></address>
|
||||
<!-- Created: Fri Jul 13 12:47:11 EDT 2001 -->
|
||||
<!-- hhmts start -->
|
||||
Last modified: Fri Dec 14 19:58:14 EST 2001
|
||||
<!-- hhmts end -->
|
||||
</body>
|
||||
</html>
|
||||
@ -1,38 +0,0 @@
|
||||
// Boost.Function library examples
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// 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;
|
||||
}
|
||||
@ -1,32 +0,0 @@
|
||||
// Boost.Function library examples
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// 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;
|
||||
}
|
||||
@ -1,44 +0,0 @@
|
||||
// Boost.Function library examples
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// 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;
|
||||
}
|
||||
@ -1,517 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
// William Kempf, Jesse Jones and Karl Nelson were all very helpful in the
|
||||
// design of this library.
|
||||
|
||||
#ifndef BOOST_FUNCTION_HPP
|
||||
#define BOOST_FUNCTION_HPP
|
||||
|
||||
#include <boost/function/function_base.hpp>
|
||||
#include <boost/function/function0.hpp>
|
||||
#include <boost/function/function1.hpp>
|
||||
#include <boost/function/function2.hpp>
|
||||
#include <boost/function/function3.hpp>
|
||||
#include <boost/function/function4.hpp>
|
||||
#include <boost/function/function5.hpp>
|
||||
#include <boost/function/function6.hpp>
|
||||
#include <boost/function/function7.hpp>
|
||||
#include <boost/function/function8.hpp>
|
||||
#include <boost/function/function9.hpp>
|
||||
#include <boost/function/function10.hpp>
|
||||
|
||||
namespace boost {
|
||||
namespace detail {
|
||||
namespace function {
|
||||
// Choose the appropriate underlying implementation
|
||||
template<int Args> struct real_get_function_impl {};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<0>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function0<R, Policy, Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<1>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function1<R, T1, Policy, Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<2>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function2<R, T1, T2, Policy, Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<3>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function3<R, T1, T2, T3, Policy, Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<4>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function4<R, T1, T2, T3, T4, Policy, Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<5>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function5<R, T1, T2, T3, T4, T5, Policy, Mixin, Allocator>
|
||||
type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<6>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function6<R, T1, T2, T3, T4, T5, T6, Policy, Mixin, Allocator>
|
||||
type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<7>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function7<R, T1, T2, T3, T4, T5, T6, T7, Policy, Mixin,
|
||||
Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<8>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function8<R, T1, T2, T3, T4, T5, T6, T7, T8, Policy, Mixin,
|
||||
Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<9>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function9<R, T1, T2, T3, T4, T5, T6, T7, T8, T9, Policy,
|
||||
Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<>
|
||||
struct real_get_function_impl<10>
|
||||
{
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy,
|
||||
typename Mixin,
|
||||
typename Allocator
|
||||
>
|
||||
struct params
|
||||
{
|
||||
typedef function10<R, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10,
|
||||
Policy, Mixin, Allocator> type;
|
||||
};
|
||||
};
|
||||
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename Policy = empty_function_policy,
|
||||
typename Mixin = empty_function_mixin,
|
||||
typename Allocator = std::allocator<function_base>
|
||||
>
|
||||
struct get_function_impl
|
||||
{
|
||||
typedef typename real_get_function_impl<
|
||||
(count_used_args<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>::value)
|
||||
>::template params<R, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10,
|
||||
Policy, Mixin, Allocator>::type
|
||||
type;
|
||||
};
|
||||
|
||||
template<
|
||||
typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10,
|
||||
typename MyPolicy = empty_function_policy,
|
||||
typename MyMixin = empty_function_mixin,
|
||||
typename MyAllocator = std::allocator<function_base>
|
||||
>
|
||||
struct function_traits_builder
|
||||
{
|
||||
typedef typename get_function_impl<R, T1, T2, T3, T4, T5, T6, T7,
|
||||
T8, T9, T10, MyPolicy, MyMixin,
|
||||
MyAllocator>::type
|
||||
type;
|
||||
|
||||
typedef MyPolicy policy_type;
|
||||
typedef MyMixin mixin_type;
|
||||
typedef MyAllocator allocator_type;
|
||||
|
||||
#ifndef BOOST_NO_DEPENDENT_NESTED_DERIVATIONS
|
||||
template<typename Policy>
|
||||
struct policy :
|
||||
public function_traits_builder<R, T1, T2, T3, T4, T5, T6, T7, T8, T9,
|
||||
T10, Policy, mixin_type,
|
||||
allocator_type> {};
|
||||
|
||||
template<typename Mixin>
|
||||
struct mixin :
|
||||
public function_traits_builder<R, T1, T2, T3, T4, T5, T6, T7, T8, T9,
|
||||
T10, policy_type, Mixin,
|
||||
allocator_type> {};
|
||||
|
||||
template<typename Allocator>
|
||||
struct allocator :
|
||||
public function_traits_builder<R, T1, T2, T3, T4, T5, T6, T7, T8, T9,
|
||||
T10, policy_type, mixin_type,
|
||||
Allocator> {};
|
||||
#else
|
||||
template<typename Policy>
|
||||
struct policy
|
||||
{
|
||||
typedef typename function_traits_builder<R, T1, T2, T3, T4, T5, T6, T7,
|
||||
T8, T9, T10, Policy,
|
||||
mixin_type,
|
||||
allocator_type>::type
|
||||
type;
|
||||
};
|
||||
|
||||
template<typename Mixin>
|
||||
struct mixin
|
||||
{
|
||||
typedef typename function_traits_builder<R, T1, T2, T3, T4, T5, T6, T7,
|
||||
T8, T9, T10, policy_type, Mixin,
|
||||
allocator_type>::type
|
||||
type;
|
||||
};
|
||||
|
||||
template<typename Allocator>
|
||||
struct allocator
|
||||
{
|
||||
typedef typename function_traits_builder<R, T1, T2, T3, T4, T5, T6, T7,
|
||||
T8, T9, T10, policy_type,
|
||||
mixin_type, Allocator>::type
|
||||
type;
|
||||
};
|
||||
#endif
|
||||
};
|
||||
|
||||
} // end namespace function
|
||||
} // end namespace detail
|
||||
|
||||
template<
|
||||
typename R,
|
||||
typename T1 = detail::function::unusable,
|
||||
typename T2 = detail::function::unusable,
|
||||
typename T3 = detail::function::unusable,
|
||||
typename T4 = detail::function::unusable,
|
||||
typename T5 = detail::function::unusable,
|
||||
typename T6 = detail::function::unusable,
|
||||
typename T7 = detail::function::unusable,
|
||||
typename T8 = detail::function::unusable,
|
||||
typename T9 = detail::function::unusable,
|
||||
typename T10 = detail::function::unusable
|
||||
>
|
||||
class function :
|
||||
public detail::function::get_function_impl<R, T1, T2, T3, T4, T5, T6, T7,
|
||||
T8, T9, T10>::type,
|
||||
public detail::function::function_traits_builder<R, T1, T2, T3, T4, T5, T6,
|
||||
T7, T8, T9, T10>
|
||||
{
|
||||
typedef typename detail::function::get_function_impl<R, T1, T2, T3, T4, T5,
|
||||
T6, T7, T8, T9, T10
|
||||
>::type
|
||||
base_type;
|
||||
|
||||
public:
|
||||
typedef typename base_type::policy_type policy_type;
|
||||
typedef typename base_type::mixin_type mixin_type;
|
||||
typedef typename base_type::allocator_type allocator_type;
|
||||
typedef function self_type;
|
||||
|
||||
function() : base_type() {}
|
||||
|
||||
template<typename Functor>
|
||||
function(Functor BOOST_FUNCTION_TARGET_FIX(const &) f) : base_type(f) {}
|
||||
|
||||
function(const self_type& f) : base_type(static_cast<const base_type&>(f)){}
|
||||
|
||||
template<typename Functor>
|
||||
self_type& operator=(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
|
||||
{
|
||||
self_type(f).swap(*this);
|
||||
return *this;
|
||||
}
|
||||
|
||||
self_type& operator=(const base_type& f)
|
||||
{
|
||||
self_type(f).swap(*this);
|
||||
return *this;
|
||||
}
|
||||
|
||||
self_type& operator=(const self_type& f)
|
||||
{
|
||||
self_type(f).swap(*this);
|
||||
return *this;
|
||||
}
|
||||
|
||||
template<typename Functor>
|
||||
void set(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
|
||||
{
|
||||
self_type(f).swap(*this);
|
||||
}
|
||||
|
||||
void set(const base_type& f)
|
||||
{
|
||||
self_type(f).swap(*this);
|
||||
}
|
||||
|
||||
void set(const self_type& f)
|
||||
{
|
||||
self_type(f).swap(*this);
|
||||
}
|
||||
};
|
||||
|
||||
template<typename R,
|
||||
typename T1,
|
||||
typename T2,
|
||||
typename T3,
|
||||
typename T4,
|
||||
typename T5,
|
||||
typename T6,
|
||||
typename T7,
|
||||
typename T8,
|
||||
typename T9,
|
||||
typename T10>
|
||||
inline void swap(function<R, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>& f1,
|
||||
function<R, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>& f2)
|
||||
{
|
||||
f1.swap(f2);
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION0_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION0_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 0
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#define BOOST_FUNCTION_PARMS
|
||||
#define BOOST_FUNCTION_ARGS
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION0_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION1_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION1_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 1
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0
|
||||
#define BOOST_FUNCTION_PARMS T0 a0
|
||||
#define BOOST_FUNCTION_ARGS a0
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION1_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION10_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION10_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 10
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3, T4, T5, T6, T7, T8, T9
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7, T8 a8, T9 a9
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3, a4, a5, a6, a7, a8, a9
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7, T8 a8, T9 a9
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3, a4, a5, a6, a7, a8, a9
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION10_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION2_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION2_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 2
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1
|
||||
#define BOOST_FUNCTION_ARGS a0, a1
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION2_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION3_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION3_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 3
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION3_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION4_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION4_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 4
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION4_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION5_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION5_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 5
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3, typename T4
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3, T4
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3, T4 a4
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3, a4
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3, T4 a4
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3, a4
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION5_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION6_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION6_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 6
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3, typename T4, typename T5
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3, T4, T5
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3, a4, a5
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3, T4 a4, T5 a5
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3, a4, a5
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION6_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION7_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION7_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 7
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3, T4, T5, T6
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3, a4, a5, a6
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3, a4, a5, a6
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION7_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION8_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION8_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 8
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3, T4, T5, T6, T7
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3, a4, a5, a6, a7
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3, a4, a5, a6, a7
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION8_HEADER
|
||||
@ -1,37 +0,0 @@
|
||||
// Boost.Function library
|
||||
//
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_FUNCTION9_HEADER
|
||||
#define BOOST_FUNCTION_FUNCTION9_HEADER
|
||||
|
||||
#define BOOST_FUNCTION_NUM_ARGS 9
|
||||
#define BOOST_FUNCTION_TEMPLATE_PARMS typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8
|
||||
#define BOOST_FUNCTION_TEMPLATE_ARGS T0, T1, T2, T3, T4, T5, T6, T7, T8
|
||||
#define BOOST_FUNCTION_PARMS T0 a0, T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7, T8 a8
|
||||
#define BOOST_FUNCTION_ARGS a0, a1, a2, a3, a4, a5, a6, a7, a8
|
||||
#define BOOST_FUNCTION_NOT_0_PARMS T1 a1, T2 a2, T3 a3, T4 a4, T5 a5, T6 a6, T7 a7, T8 a8
|
||||
#define BOOST_FUNCTION_NOT_0_ARGS a1, a2, a3, a4, a5, a6, a7, a8
|
||||
|
||||
#include <boost/function/function_template.hpp>
|
||||
|
||||
#undef BOOST_FUNCTION_NOT_0_ARGS
|
||||
#undef BOOST_FUNCTION_NOT_0_PARMS
|
||||
#undef BOOST_FUNCTION_ARGS
|
||||
#undef BOOST_FUNCTION_PARMS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_ARGS
|
||||
#undef BOOST_FUNCTION_TEMPLATE_PARMS
|
||||
#undef BOOST_FUNCTION_NUM_ARGS
|
||||
|
||||
#endif // BOOST_FUNCTION_FUNCTION9_HEADER
|
||||
@ -1,384 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#ifndef BOOST_FUNCTION_BASE_HEADER
|
||||
#define BOOST_FUNCTION_BASE_HEADER
|
||||
|
||||
#include <string>
|
||||
#include <stdexcept>
|
||||
#include <memory>
|
||||
#include <new>
|
||||
#include <typeinfo>
|
||||
#include <boost/config.hpp>
|
||||
#include <boost/type_traits.hpp>
|
||||
#include <boost/ref.hpp>
|
||||
|
||||
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 || defined(__ICL) && __ICL <= 600 || defined(__MWERKS__) && __MWERKS__ < 0x2406
|
||||
# define BOOST_FUNCTION_TARGET_FIX(x) x
|
||||
#else
|
||||
# define BOOST_FUNCTION_TARGET_FIX(x)
|
||||
#endif // not MSVC
|
||||
|
||||
namespace boost {
|
||||
namespace detail {
|
||||
namespace function {
|
||||
template<bool> struct truth {};
|
||||
|
||||
/*
|
||||
* The ct_if implementation is temporary code. When a Boost metaprogramming
|
||||
* library is introduced, Boost.Function will use it instead.
|
||||
*/
|
||||
namespace intimate {
|
||||
struct SelectThen
|
||||
{
|
||||
template<typename Then, typename Else>
|
||||
struct Result
|
||||
{
|
||||
typedef Then type;
|
||||
};
|
||||
};
|
||||
|
||||
struct SelectElse
|
||||
{
|
||||
template<typename Then, typename Else>
|
||||
struct Result
|
||||
{
|
||||
typedef Else type;
|
||||
};
|
||||
};
|
||||
|
||||
template<bool Condition>
|
||||
struct Selector
|
||||
{
|
||||
typedef SelectThen type;
|
||||
};
|
||||
|
||||
template<>
|
||||
struct Selector<false>
|
||||
{
|
||||
typedef SelectElse type;
|
||||
};
|
||||
} // end namespace intimate
|
||||
|
||||
template<bool Condition, typename Then, typename Else>
|
||||
struct ct_if
|
||||
{
|
||||
typedef typename intimate::Selector<Condition>::type select;
|
||||
typedef typename select::template Result<Then,Else>::type type;
|
||||
};
|
||||
|
||||
/**
|
||||
* A union of a function pointer and a void pointer. This is necessary
|
||||
* because 5.2.10/6 allows reinterpret_cast<> to safely cast between
|
||||
* function pointer types and 5.2.9/10 allows static_cast<> to safely
|
||||
* cast between a void pointer and an object pointer. But it is not legal
|
||||
* to cast between a function pointer and a void* (in either direction),
|
||||
* so function requires a union of the two. */
|
||||
union any_pointer
|
||||
{
|
||||
void* obj_ptr;
|
||||
const void* const_obj_ptr;
|
||||
void (*func_ptr)();
|
||||
|
||||
explicit any_pointer(void* p) : obj_ptr(p) {}
|
||||
explicit any_pointer(const void* p) : const_obj_ptr(p) {}
|
||||
explicit any_pointer(void (*p)()) : func_ptr(p) {}
|
||||
};
|
||||
|
||||
/**
|
||||
* The unusable class is a placeholder for unused function arguments
|
||||
* It is also completely unusable except that it constructable from
|
||||
* anything. This helps compilers without partial specialization to
|
||||
* handle Boost.Function objects returning void.
|
||||
*/
|
||||
struct unusable
|
||||
{
|
||||
unusable() {}
|
||||
template<typename T> unusable(const T&) {}
|
||||
};
|
||||
|
||||
/* Determine the return type. This supports compilers that do not support
|
||||
* void returns or partial specialization by silently changing the return
|
||||
* type to "unusable".
|
||||
*/
|
||||
template<typename T> struct function_return_type { typedef T type; };
|
||||
|
||||
template<>
|
||||
struct function_return_type<void>
|
||||
{
|
||||
typedef unusable type;
|
||||
};
|
||||
|
||||
// The operation type to perform on the given functor/function pointer
|
||||
enum functor_manager_operation_type {
|
||||
clone_functor_tag,
|
||||
destroy_functor_tag
|
||||
};
|
||||
|
||||
// Tags used to decide between different types of functions
|
||||
struct function_ptr_tag {};
|
||||
struct function_obj_tag {};
|
||||
struct member_ptr_tag {};
|
||||
struct function_obj_ref_tag {};
|
||||
struct stateless_function_obj_tag {};
|
||||
|
||||
template<typename F>
|
||||
class get_function_tag
|
||||
{
|
||||
typedef typename ct_if<(is_pointer<F>::value),
|
||||
function_ptr_tag,
|
||||
function_obj_tag>::type ptr_or_obj_tag;
|
||||
|
||||
typedef typename ct_if<(is_member_pointer<F>::value),
|
||||
member_ptr_tag,
|
||||
ptr_or_obj_tag>::type ptr_or_obj_or_mem_tag;
|
||||
|
||||
typedef typename ct_if<(is_reference_wrapper<F>::value),
|
||||
function_obj_ref_tag,
|
||||
ptr_or_obj_or_mem_tag>::type or_ref_tag;
|
||||
|
||||
public:
|
||||
typedef typename ct_if<(is_stateless<F>::value),
|
||||
stateless_function_obj_tag,
|
||||
or_ref_tag>::type type;
|
||||
};
|
||||
|
||||
// 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)
|
||||
{
|
||||
if (op == clone_functor_tag)
|
||||
return f;
|
||||
else
|
||||
return any_pointer(reinterpret_cast<void*>(0));
|
||||
}
|
||||
|
||||
/**
|
||||
* The functor_manager class contains a static function "manage" which
|
||||
* can clone or destroy the given function/function object pointer.
|
||||
*/
|
||||
template<typename Functor, typename Allocator>
|
||||
struct functor_manager
|
||||
{
|
||||
private:
|
||||
typedef Functor functor_type;
|
||||
|
||||
// For function pointers, the manager is trivial
|
||||
static inline any_pointer
|
||||
manager(any_pointer function_ptr,
|
||||
functor_manager_operation_type op,
|
||||
function_ptr_tag)
|
||||
{
|
||||
if (op == clone_functor_tag)
|
||||
return function_ptr;
|
||||
else
|
||||
return any_pointer(static_cast<void (*)()>(0));
|
||||
}
|
||||
|
||||
// For function object pointers, we clone the pointer to each
|
||||
// function has its own version.
|
||||
static inline any_pointer
|
||||
manager(any_pointer function_obj_ptr,
|
||||
functor_manager_operation_type op,
|
||||
function_obj_tag)
|
||||
{
|
||||
#ifndef BOOST_NO_STD_ALLOCATOR
|
||||
typedef typename Allocator::template rebind<functor_type>::other
|
||||
allocator_type;
|
||||
typedef typename allocator_type::pointer pointer_type;
|
||||
#else
|
||||
typedef functor_type* pointer_type;
|
||||
#endif // BOOST_NO_STD_ALLOCATOR
|
||||
|
||||
# ifndef BOOST_NO_STD_ALLOCATOR
|
||||
allocator_type allocator;
|
||||
# endif // BOOST_NO_STD_ALLOCATOR
|
||||
|
||||
if (op == clone_functor_tag) {
|
||||
functor_type* f =
|
||||
static_cast<functor_type*>(function_obj_ptr.obj_ptr);
|
||||
|
||||
// Clone the functor
|
||||
# ifndef BOOST_NO_STD_ALLOCATOR
|
||||
pointer_type copy = allocator.allocate(1);
|
||||
allocator.construct(copy, *f);
|
||||
|
||||
// Get back to the original pointer type
|
||||
functor_type* new_f = static_cast<functor_type*>(copy);
|
||||
# else
|
||||
functor_type* new_f = new functor_type(*f);
|
||||
# endif // BOOST_NO_STD_ALLOCATOR
|
||||
return any_pointer(static_cast<void*>(new_f));
|
||||
}
|
||||
else {
|
||||
/* Cast from the void pointer to the functor pointer type */
|
||||
functor_type* f =
|
||||
reinterpret_cast<functor_type*>(function_obj_ptr.obj_ptr);
|
||||
|
||||
# ifndef BOOST_NO_STD_ALLOCATOR
|
||||
/* Cast from the functor pointer type to the allocator's pointer
|
||||
type */
|
||||
pointer_type victim = static_cast<pointer_type>(f);
|
||||
|
||||
// Destroy and deallocate the functor
|
||||
allocator.destroy(victim);
|
||||
allocator.deallocate(victim, 1);
|
||||
# else
|
||||
delete f;
|
||||
# endif // BOOST_NO_STD_ALLOCATOR
|
||||
|
||||
return any_pointer(static_cast<void*>(0));
|
||||
}
|
||||
}
|
||||
public:
|
||||
/* Dispatch to an appropriate manager based on whether we have a
|
||||
function pointer or a function object pointer. */
|
||||
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());
|
||||
}
|
||||
};
|
||||
|
||||
// value=1 if the given type is not "unusable"
|
||||
template<typename T>
|
||||
struct count_if_used
|
||||
{
|
||||
BOOST_STATIC_CONSTANT(int, value = 1);
|
||||
};
|
||||
|
||||
// value=0 for unusable types
|
||||
template<>
|
||||
struct count_if_used<unusable>
|
||||
{
|
||||
BOOST_STATIC_CONSTANT(int, value = 0);
|
||||
};
|
||||
|
||||
// Count the number of arguments (from the given set) which are not
|
||||
// "unusable" (therefore, count those arguments that are used).
|
||||
template<typename T1, typename T2, typename T3, typename T4,
|
||||
typename T5, typename T6, typename T7, typename T8,
|
||||
typename T9, typename T10>
|
||||
struct count_used_args
|
||||
{
|
||||
BOOST_STATIC_CONSTANT(int, value =
|
||||
(count_if_used<T1>::value +
|
||||
count_if_used<T2>::value +
|
||||
count_if_used<T3>::value +
|
||||
count_if_used<T4>::value +
|
||||
count_if_used<T5>::value +
|
||||
count_if_used<T6>::value +
|
||||
count_if_used<T7>::value +
|
||||
count_if_used<T8>::value +
|
||||
count_if_used<T9>::value +
|
||||
count_if_used<T10>::value));
|
||||
};
|
||||
} // end namespace function
|
||||
} // end namespace detail
|
||||
|
||||
/**
|
||||
* The function_base class contains the basic elements needed for the
|
||||
* function1, function2, function3, etc. classes. It is common to all
|
||||
* functions (and as such can be used to tell if we have one of the
|
||||
* functionN objects).
|
||||
*/
|
||||
class function_base
|
||||
{
|
||||
public:
|
||||
function_base() : manager(0), functor(static_cast<void*>(0)) {}
|
||||
|
||||
// Is this function empty?
|
||||
bool empty() const { return !manager; }
|
||||
|
||||
public: // should be protected, but GCC 2.95.3 will fail to allow access
|
||||
detail::function::any_pointer (*manager)(
|
||||
detail::function::any_pointer,
|
||||
#if (defined __SUNPRO_CC) && (__SUNPRO_CC <= 0x530) && !(defined BOOST_NO_COMPILER_CONFIG)
|
||||
// Sun C++ 5.3 can't handle the safe_bool idiom, so don't use it
|
||||
operator bool () const { return !this->empty(); }
|
||||
#else
|
||||
detail::function::functor_manager_operation_type);
|
||||
detail::function::any_pointer functor;
|
||||
|
||||
private:
|
||||
struct dummy {
|
||||
void nonnull() {};
|
||||
};
|
||||
|
||||
typedef void (dummy::*safe_bool)();
|
||||
|
||||
public:
|
||||
operator safe_bool () const
|
||||
{ return (this->empty())? 0 : &dummy::nonnull; }
|
||||
#endif
|
||||
|
||||
safe_bool operator!() const
|
||||
{ return (this->empty())? &dummy::nonnull : 0; }
|
||||
};
|
||||
|
||||
/* 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&);
|
||||
|
||||
namespace detail {
|
||||
namespace function {
|
||||
// The result is not a Boost.Function object, so we assume that this
|
||||
// target is not empty
|
||||
template<typename FunctionObj>
|
||||
inline bool has_empty_target(const FunctionObj&, truth<false>)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
// The result is a Boost.Function object, so query whether it is empty
|
||||
// or not
|
||||
template<typename FunctionObj>
|
||||
inline bool has_empty_target(const FunctionObj& f, truth<true>)
|
||||
{
|
||||
return f.empty();
|
||||
}
|
||||
} // end namespace function
|
||||
} // end namespace detail
|
||||
|
||||
// The default function policy is to do nothing before and after the call.
|
||||
struct empty_function_policy
|
||||
{
|
||||
inline void precall(const function_base*) {}
|
||||
inline void postcall(const function_base*) {}
|
||||
};
|
||||
|
||||
// The default function mixin does nothing. The assignment and
|
||||
// copy-construction operators are all defined because MSVC defines broken
|
||||
// versions.
|
||||
struct empty_function_mixin
|
||||
{
|
||||
empty_function_mixin() {}
|
||||
empty_function_mixin(const empty_function_mixin&) {}
|
||||
|
||||
empty_function_mixin& operator=(const empty_function_mixin&)
|
||||
{
|
||||
return *this;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif // BOOST_FUNCTION_BASE_HEADER
|
||||
@ -23,6 +23,7 @@
|
||||
# include <boost/config.hpp>
|
||||
# include <boost/function/function_base.hpp>
|
||||
# include <boost/mem_fn.hpp>
|
||||
# include <boost/type_traits/arithmetic_traits.hpp>
|
||||
#endif // BOOST_FUNCTION_FUNCTION_TEMPLATE_HPP
|
||||
|
||||
// Type of the default allocator
|
||||
@ -167,7 +168,8 @@ namespace boost {
|
||||
>
|
||||
struct BOOST_FUNCTION_GET_FUNCTION_INVOKER
|
||||
{
|
||||
typedef typename ct_if<(is_void<R>::value),
|
||||
BOOST_STATIC_CONSTANT(bool, is_void_ = ::boost::is_void<R>::value);
|
||||
typedef typename ct_if<is_void_,
|
||||
BOOST_FUNCTION_VOID_FUNCTION_INVOKER<
|
||||
FunctionPtr,
|
||||
R BOOST_FUNCTION_COMMA
|
||||
@ -188,7 +190,8 @@ namespace boost {
|
||||
>
|
||||
struct BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER
|
||||
{
|
||||
typedef typename ct_if<(is_void<R>::value),
|
||||
BOOST_STATIC_CONSTANT(bool, is_void_ = ::boost::is_void<R>::value);
|
||||
typedef typename ct_if<is_void_,
|
||||
BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER<
|
||||
FunctionObj,
|
||||
R BOOST_FUNCTION_COMMA
|
||||
@ -209,7 +212,8 @@ namespace boost {
|
||||
>
|
||||
struct BOOST_FUNCTION_GET_STATELESS_FUNCTION_OBJ_INVOKER
|
||||
{
|
||||
typedef typename ct_if<(is_void<R>::value),
|
||||
BOOST_STATIC_CONSTANT(bool, is_void_ = ::boost::is_void<R>::value);
|
||||
typedef typename ct_if<is_void_,
|
||||
BOOST_FUNCTION_STATELESS_VOID_FUNCTION_OBJ_INVOKER<
|
||||
FunctionObj,
|
||||
R BOOST_FUNCTION_COMMA
|
||||
@ -229,11 +233,16 @@ namespace boost {
|
||||
template<
|
||||
typename R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_PARMS,
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
typename Policy = empty_function_policy,
|
||||
typename Mixin = empty_function_mixin,
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
typename Allocator = BOOST_FUNCTION_DEFAULT_ALLOCATOR
|
||||
>
|
||||
class BOOST_FUNCTION_FUNCTION : public function_base, public Mixin
|
||||
class BOOST_FUNCTION_FUNCTION : public function_base
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
, public Mixin
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
{
|
||||
typedef typename detail::function::function_return_type<R>::type
|
||||
internal_result_type;
|
||||
@ -248,41 +257,66 @@ namespace boost {
|
||||
typedef T1 second_argument_type;
|
||||
#endif
|
||||
|
||||
BOOST_STATIC_CONSTANT(int, arity = BOOST_FUNCTION_NUM_ARGS);
|
||||
BOOST_FUNCTION_ARG_TYPES
|
||||
|
||||
#ifndef BOOST_NO_VOID_RETURNS
|
||||
typedef R result_type;
|
||||
#else
|
||||
typedef internal_result_type result_type;
|
||||
#endif // BOOST_NO_VOID_RETURNS
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
typedef Policy policy_type;
|
||||
typedef Mixin mixin_type;
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
typedef Allocator allocator_type;
|
||||
typedef BOOST_FUNCTION_FUNCTION self_type;
|
||||
|
||||
BOOST_FUNCTION_FUNCTION() : function_base(), Mixin(), invoker(0) {}
|
||||
BOOST_FUNCTION_FUNCTION() : function_base()
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
, Mixin()
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
, invoker(0) {}
|
||||
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
explicit BOOST_FUNCTION_FUNCTION(const Mixin& m) :
|
||||
function_base(), Mixin(m), invoker(0)
|
||||
function_base(),
|
||||
Mixin(m),
|
||||
invoker(0)
|
||||
{
|
||||
}
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
|
||||
// MSVC chokes if the following two constructors are collapsed into
|
||||
// one with a default parameter.
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f) :
|
||||
function_base(), Mixin(), invoker(0)
|
||||
function_base(),
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
Mixin(),
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
invoker(0)
|
||||
{
|
||||
this->assign_to(f);
|
||||
}
|
||||
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_FUNCTION(Functor f, const Mixin& m) :
|
||||
function_base(), Mixin(m), invoker(0)
|
||||
function_base(),
|
||||
Mixin(m),
|
||||
invoker(0)
|
||||
{
|
||||
this->assign_to(f);
|
||||
}
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
|
||||
BOOST_FUNCTION_FUNCTION(const BOOST_FUNCTION_FUNCTION& f) :
|
||||
function_base(), Mixin(static_cast<const Mixin&>(f)), invoker(0)
|
||||
function_base(),
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
Mixin(static_cast<const Mixin&>(f)),
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
invoker(0)
|
||||
{
|
||||
this->assign_to_own(f);
|
||||
}
|
||||
@ -293,14 +327,19 @@ namespace boost {
|
||||
{
|
||||
assert(!this->empty());
|
||||
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
policy_type policy;
|
||||
policy.precall(this);
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
|
||||
internal_result_type result = invoker(function_base::functor
|
||||
BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_ARGS);
|
||||
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
policy.postcall(this);
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
|
||||
#ifndef BOOST_NO_VOID_RETURNS
|
||||
return static_cast<result_type>(result);
|
||||
#else
|
||||
@ -317,15 +356,23 @@ namespace boost {
|
||||
BOOST_FUNCTION_FUNCTION&
|
||||
operator=(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
|
||||
{
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
self_type(f, static_cast<const Mixin&>(*this)).swap(*this);
|
||||
#else
|
||||
self_type(f).swap(*this);
|
||||
#endif // BOOST_FUNCTION_NO_DEPRECATED
|
||||
return *this;
|
||||
}
|
||||
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
template<typename Functor>
|
||||
BOOST_FUNCTION_DEPRECATED_PRE
|
||||
void set(Functor BOOST_FUNCTION_TARGET_FIX(const &) f)
|
||||
{
|
||||
BOOST_FUNCTION_DEPRECATED_INNER
|
||||
self_type(f, static_cast<const Mixin&>(*this)).swap(*this);
|
||||
}
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
|
||||
// Assignment from another BOOST_FUNCTION_FUNCTION
|
||||
BOOST_FUNCTION_FUNCTION& operator=(const BOOST_FUNCTION_FUNCTION& f)
|
||||
@ -337,14 +384,18 @@ namespace boost {
|
||||
return *this;
|
||||
}
|
||||
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
// Assignment from another BOOST_FUNCTION_FUNCTION
|
||||
BOOST_FUNCTION_DEPRECATED_PRE
|
||||
void set(const BOOST_FUNCTION_FUNCTION& f)
|
||||
{
|
||||
BOOST_FUNCTION_DEPRECATED_INNER
|
||||
if (&f == this)
|
||||
return;
|
||||
|
||||
self_type(f).swap(*this);
|
||||
}
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
|
||||
void swap(BOOST_FUNCTION_FUNCTION& other)
|
||||
{
|
||||
@ -354,7 +405,9 @@ namespace boost {
|
||||
std::swap(function_base::manager, other.manager);
|
||||
std::swap(function_base::functor, other.functor);
|
||||
std::swap(invoker, other.invoker);
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
std::swap(static_cast<Mixin&>(*this), static_cast<Mixin&>(other));
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
}
|
||||
|
||||
// Clear out a target, if there is one
|
||||
@ -362,8 +415,8 @@ namespace boost {
|
||||
{
|
||||
if (function_base::manager) {
|
||||
function_base::functor =
|
||||
function_base::manager(function_base::functor,
|
||||
detail::function::destroy_functor_tag);
|
||||
function_base::manager(function_base::functor,
|
||||
detail::function::destroy_functor_tag);
|
||||
}
|
||||
|
||||
function_base::manager = 0;
|
||||
@ -377,7 +430,7 @@ namespace boost {
|
||||
invoker = f.invoker;
|
||||
function_base::manager = f.manager;
|
||||
function_base::functor =
|
||||
f.manager(f.functor, detail::function::clone_functor_tag);
|
||||
f.manager(f.functor, detail::function::clone_functor_tag);
|
||||
}
|
||||
}
|
||||
|
||||
@ -403,9 +456,9 @@ namespace boost {
|
||||
|
||||
invoker = &invoker_type::invoke;
|
||||
function_base::manager =
|
||||
&detail::function::functor_manager<FunctionPtr, Allocator>::manage;
|
||||
&detail::function::functor_manager<FunctionPtr, Allocator>::manage;
|
||||
function_base::functor =
|
||||
function_base::manager(detail::function::any_pointer(
|
||||
function_base::manager(detail::function::any_pointer(
|
||||
// should be a reinterpret cast, but some compilers
|
||||
// insist on giving cv-qualifiers to free functions
|
||||
(void (*)())(f)
|
||||
@ -425,11 +478,7 @@ namespace boost {
|
||||
template<typename FunctionObj>
|
||||
void assign_to(FunctionObj f, detail::function::function_obj_tag)
|
||||
{
|
||||
typedef detail::function::truth<
|
||||
boost::is_base_and_derived<function_base, FunctionObj>::value>
|
||||
is_boost_function;
|
||||
|
||||
if (!detail::function::has_empty_target(f, is_boost_function())) {
|
||||
if (!detail::function::has_empty_target(addressof(f))) {
|
||||
typedef
|
||||
typename detail::function::BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
|
||||
FunctionObj,
|
||||
@ -440,22 +489,22 @@ namespace boost {
|
||||
|
||||
invoker = &invoker_type::invoke;
|
||||
function_base::manager = &detail::function::functor_manager<
|
||||
FunctionObj, Allocator>::manage;
|
||||
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;
|
||||
pointer_type copy = allocator.allocate(1);
|
||||
allocator.construct(copy, f);
|
||||
allocator_type allocator;
|
||||
pointer_type copy = allocator.allocate(1);
|
||||
allocator.construct(copy, f);
|
||||
|
||||
// Get back to the original pointer type
|
||||
FunctionObj* new_f = static_cast<FunctionObj*>(copy);
|
||||
// Get back to the original pointer type
|
||||
FunctionObj* new_f = static_cast<FunctionObj*>(copy);
|
||||
#else
|
||||
FunctionObj* new_f = new FunctionObj(f);
|
||||
FunctionObj* new_f = new FunctionObj(f);
|
||||
#endif // BOOST_NO_STD_ALLOCATOR
|
||||
function_base::functor =
|
||||
detail::function::any_pointer(static_cast<void*>(new_f));
|
||||
detail::function::any_pointer(static_cast<void*>(new_f));
|
||||
}
|
||||
}
|
||||
|
||||
@ -463,11 +512,7 @@ namespace boost {
|
||||
void assign_to(const reference_wrapper<FunctionObj>& f,
|
||||
detail::function::function_obj_ref_tag)
|
||||
{
|
||||
typedef detail::function::truth<
|
||||
boost::is_base_and_derived<function_base, FunctionObj>::value>
|
||||
is_boost_function;
|
||||
|
||||
if (!detail::function::has_empty_target(f.get(), is_boost_function())) {
|
||||
if (!detail::function::has_empty_target(f.get_pointer())) {
|
||||
typedef
|
||||
typename detail::function::BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER<
|
||||
FunctionObj,
|
||||
@ -482,7 +527,7 @@ namespace boost {
|
||||
function_base::manager(
|
||||
detail::function::any_pointer(
|
||||
const_cast<FunctionObj*>(f.get_pointer())),
|
||||
detail::function::clone_functor_tag);
|
||||
detail::function::clone_functor_tag);
|
||||
}
|
||||
}
|
||||
|
||||
@ -510,19 +555,26 @@ namespace boost {
|
||||
};
|
||||
|
||||
template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS ,
|
||||
typename Policy, typename Mixin, typename Allocator>
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
typename Policy, typename Mixin,
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
typename Allocator>
|
||||
inline void swap(BOOST_FUNCTION_FUNCTION<
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS ,
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
Policy,
|
||||
Mixin,
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
Allocator
|
||||
>& f1,
|
||||
BOOST_FUNCTION_FUNCTION<
|
||||
R BOOST_FUNCTION_COMMA
|
||||
BOOST_FUNCTION_TEMPLATE_ARGS,
|
||||
#ifndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
Policy,
|
||||
Mixin,
|
||||
#endif // ndef BOOST_FUNCTION_NO_DEPRECATED
|
||||
Allocator
|
||||
>& f2)
|
||||
{
|
||||
|
||||
@ -1,111 +0,0 @@
|
||||
#!/usr/bin/perl -w
|
||||
#
|
||||
# Boost.Function library
|
||||
#
|
||||
# Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
#
|
||||
# Permission to copy, use, sell and distribute this software is granted
|
||||
# provided this copyright notice appears in all copies.
|
||||
# Permission to modify the code and to distribute modified code is granted
|
||||
# provided this copyright notice appears in all copies, and a notice
|
||||
# that the code was modified is included with the copyright notice.
|
||||
#
|
||||
# This software is provided "as is" without express or implied warranty,
|
||||
# and with no claim as to its suitability for any purpose.
|
||||
#
|
||||
# For more information, see http://www.boost.org
|
||||
use English;
|
||||
|
||||
if ($#ARGV < 0) {
|
||||
print "Usage: perl gen_function_N <number of arguments>\n";
|
||||
exit;
|
||||
}
|
||||
|
||||
|
||||
$totalNumArgs = $ARGV[0];
|
||||
for ($numArgs = 0; $numArgs <= $totalNumArgs; ++$numArgs) {
|
||||
open OUT, ">function$numArgs.hpp";
|
||||
print OUT "// Boost.Function library\n";
|
||||
print OUT "//\n";
|
||||
print OUT "// Copyright (C) 2001 Doug Gregor (gregod\@cs.rpi.edu)\n";
|
||||
print OUT "//\n";
|
||||
print OUT "// Permission to copy, use, sell and distribute this software is granted\n";
|
||||
print OUT "// provided this copyright notice appears in all copies.\n";
|
||||
print OUT "// Permission to modify the code and to distribute modified code is granted\n";
|
||||
print OUT "// provided this copyright notice appears in all copies, and a notice\n";
|
||||
print OUT "// that the code was modified is included with the copyright notice.\n";
|
||||
print OUT "//\n";
|
||||
print OUT "// This software is provided \"as is\" without express or implied warranty,\n";
|
||||
print OUT "// and with no claim as to its suitability for any purpose.\n";
|
||||
print OUT " \n";
|
||||
print OUT "// For more information, see http://www.boost.org\n";
|
||||
print OUT "\n";
|
||||
print OUT "#ifndef BOOST_FUNCTION_FUNCTION" . $numArgs . "_HEADER\n";
|
||||
print OUT "#define BOOST_FUNCTION_FUNCTION" , $numArgs . "_HEADER\n";
|
||||
print OUT "\n";
|
||||
print OUT "#define BOOST_FUNCTION_NUM_ARGS $numArgs\n";
|
||||
|
||||
$templateParms = "";
|
||||
for ($i = 0; $i < $numArgs; ++$i) {
|
||||
if ($i > 0) {
|
||||
$templateParms .= ", ";
|
||||
}
|
||||
$templateParms .= "typename T$i";
|
||||
}
|
||||
print OUT "#define BOOST_FUNCTION_TEMPLATE_PARMS $templateParms\n";
|
||||
|
||||
$_ = $templateParms;
|
||||
s/typename //g;
|
||||
$templateArgs = $_;
|
||||
print OUT "#define BOOST_FUNCTION_TEMPLATE_ARGS $templateArgs\n";
|
||||
|
||||
$parms = "";
|
||||
for ($i = 0; $i < $numArgs; ++$i) {
|
||||
if ($i > 0) {
|
||||
$parms .= ", ";
|
||||
}
|
||||
$parms .= "T$i a$i";
|
||||
}
|
||||
print OUT "#define BOOST_FUNCTION_PARMS $parms\n";
|
||||
|
||||
$args = "";
|
||||
for ($i = 0; $i < $numArgs; ++$i) {
|
||||
if ($i > 0) {
|
||||
$args .= ", ";
|
||||
}
|
||||
$args .= "a$i";
|
||||
}
|
||||
print OUT "#define BOOST_FUNCTION_ARGS $args\n";
|
||||
|
||||
$not0Parms = "";
|
||||
for ($i = 1; $i < $numArgs; ++$i) {
|
||||
if ($i > 1) {
|
||||
$not0Parms .= ", ";
|
||||
}
|
||||
$not0Parms .= "T$i a$i";
|
||||
}
|
||||
print OUT "#define BOOST_FUNCTION_NOT_0_PARMS $not0Parms\n";
|
||||
|
||||
$not0Args = "";
|
||||
for ($i = 1; $i < $numArgs; ++$i) {
|
||||
if ($i > 1) {
|
||||
$not0Args .= ", ";
|
||||
}
|
||||
$not0Args .= "a$i";
|
||||
}
|
||||
print OUT "#define BOOST_FUNCTION_NOT_0_ARGS $not0Args\n";
|
||||
|
||||
print OUT "\n";
|
||||
print OUT "#include <boost/function/function_template.hpp>\n";
|
||||
print OUT "\n";
|
||||
print OUT "#undef BOOST_FUNCTION_NOT_0_ARGS\n";
|
||||
print OUT "#undef BOOST_FUNCTION_NOT_0_PARMS\n";
|
||||
print OUT "#undef BOOST_FUNCTION_ARGS\n";
|
||||
print OUT "#undef BOOST_FUNCTION_PARMS\n";
|
||||
print OUT "#undef BOOST_FUNCTION_TEMPLATE_ARGS\n";
|
||||
print OUT "#undef BOOST_FUNCTION_TEMPLATE_PARMS\n";
|
||||
print OUT "#undef BOOST_FUNCTION_NUM_ARGS\n";
|
||||
print OUT "\n";
|
||||
print OUT "#endif // BOOST_FUNCTION_FUNCTION" . $numArgs . "_HEADER\n";
|
||||
close OUT;
|
||||
}
|
||||
89
index.html
89
index.html
@ -1,89 +0,0 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<html>
|
||||
<head>
|
||||
<title>Boost.Function</title>
|
||||
</head>
|
||||
|
||||
<body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080">
|
||||
|
||||
<h1><IMG SRC="../../c++boost.gif" WIDTH="276" HEIGHT="86">Header <<a HREF="../../boost/function.hpp">boost/function.hpp</a>></h1>
|
||||
|
||||
<p> The header <<a HREF="../../boost/function.hpp">boost/function.hpp</a>> includes 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.
|
||||
|
||||
<p> 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.
|
||||
|
||||
<ul>
|
||||
<li><a href="doc/tutorial.html">Tutorial</a></li>
|
||||
<li><a href="doc/reference.html">Reference manual</a></li>
|
||||
<li><a href="#vspointers">Boost.Function vs. Function Pointers</a></li>
|
||||
<li><a href="#performance">Performance</a></li>
|
||||
<li><a href="#portability">Portability</a></li>
|
||||
<li><a href="#design">Design rationale</a></li>
|
||||
<li><a href="#acknowledgements">Acknowledgements</a></li>
|
||||
<li><a href="doc/faq.html">Frequently Asked Questions</a></li>
|
||||
</ul>
|
||||
|
||||
<h2><a name="vspointers">Boost.Function vs. Function Pointers</a></h2>
|
||||
<p>Boost.Function has several advantages over function pointers, namely:
|
||||
|
||||
<ul>
|
||||
<li>Boost.Function allows arbitrary compatible function objects to be targets (instead of requiring an exact function signature).</li>
|
||||
<li>Boost.Function may be used with argument-binding and other function object construction libraries.</li>
|
||||
<li>Boost.Function has predictible debug behavior when an empty function object is called. </li>
|
||||
<li>Boost.Function can be adapted to perform operations before and after each call, allowing, for instance, synchronization primitives to be made part of the function type.</li>
|
||||
</ul>
|
||||
|
||||
And, of course, function pointers have several advantages over Boost.Function:
|
||||
|
||||
<ul>
|
||||
<li> Function pointers are smaller (the size of one pointer instead of three) </li>
|
||||
<li> Function pointers are faster (Boost.Function may require two calls through function pointers) </li>
|
||||
<li> Function pointers are backward-compatible with C libraries.</li>
|
||||
<li> More readable error messages. </li>
|
||||
</ul>
|
||||
|
||||
|
||||
<p> The above two lists were adapted from comments made by Darin Adler.
|
||||
|
||||
<h2><a name="performance">Performance</a></h2>
|
||||
<h3>Function object wrapper size</h3>
|
||||
<p> 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.
|
||||
|
||||
<h3>Copying efficiency</h3>
|
||||
<p> 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 <a href="../bind/ref.html"><code>ref</code></a>) if the cost of this cloning becomes prohibitive.
|
||||
|
||||
<h3>Invocation efficiency</h3>
|
||||
<p> 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).
|
||||
|
||||
<h2><a name="portability">Portability</a></h2>
|
||||
<p> The function object wrappers have been designed to be as portable as possible, and to support many compilers even when they do not support the C++ standard well. The following compilers have passed all of the test cases included with <code>boost::function</code>.
|
||||
<ul>
|
||||
<li>GCC 2.95.3</li>
|
||||
<li>GCC 3.0</li>
|
||||
<li>SGI MIPSpro 7.3.0</li>
|
||||
<li>Borland C++ 5.5.1</li>
|
||||
<li>Comeau C++ 4.2.45.2</li>
|
||||
<li>Metrowerks Codewarrior 6.1</li>
|
||||
</ul>
|
||||
|
||||
<p> The following compilers work with <code>boost::function</code>, but have some problems:
|
||||
<ul>
|
||||
<li>Microsoft Visual C++ 6.0 (service pack 5): allocators not supported, some problems with <code>boost::function</code> class template (numbered variants seem to work)</li>
|
||||
<li>Intel C++ 5.0: allocators not supported</li>
|
||||
</ul>
|
||||
|
||||
<p> If your compiler is not listed, there is a small set of tests to stress the capabilities of the <code>boost::function</code> library. A standards-compliant compiler should compile the code without any modifications, but if you find you run into problems please submit a bug report.
|
||||
|
||||
<h2><a name="design">Design rationale</a></h2>
|
||||
<h3>Combatting virtual function bloat</h3>
|
||||
<p> 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 <code>boost::function</code> objects are used.
|
||||
|
||||
<p> 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.
|
||||
|
||||
<h2><a name="acknowledgements">Acknowledgements</a></h2>
|
||||
<p> 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.
|
||||
|
||||
<hr>
|
||||
<address><a href="mailto:gregod@cs.rpi.edu">Doug Gregor</a></address>
|
||||
</body>
|
||||
</html>
|
||||
@ -1,88 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.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*[])
|
||||
{
|
||||
function<int, int, int>::allocator< counting_allocator<int> >::type 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();
|
||||
|
||||
function<void>::allocator< counting_allocator<int> >::type 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;
|
||||
}
|
||||
@ -1,645 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.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_three_obj three;
|
||||
|
||||
// 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.empty());
|
||||
|
||||
// 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.set(v1);
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v1.clear();
|
||||
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);
|
||||
|
||||
// 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.set(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.set(&write_five);
|
||||
BOOST_TEST(v2);
|
||||
|
||||
// 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);
|
||||
|
||||
// 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 function0<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 return values
|
||||
typedef function0<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);
|
||||
i0.clear();
|
||||
BOOST_TEST(!i0);
|
||||
|
||||
// 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);
|
||||
i1.clear();
|
||||
BOOST_TEST(!i1);
|
||||
}
|
||||
|
||||
static void
|
||||
test_one_arg()
|
||||
{
|
||||
negate<int> neg;
|
||||
|
||||
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;
|
||||
}
|
||||
@ -1,645 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.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 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.empty());
|
||||
|
||||
// Invocation of a function
|
||||
global_int = 0;
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear() method
|
||||
v1.clear();
|
||||
BOOST_TEST(v1.empty());
|
||||
|
||||
// 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.set(v1);
|
||||
v1();
|
||||
BOOST_TEST(global_int == 5);
|
||||
|
||||
// clear()
|
||||
v1.clear();
|
||||
BOOST_TEST(v1.empty());
|
||||
|
||||
// Assignment to an empty function from a free function
|
||||
v1 = BOOST_FUNCTION_TARGET_FIX(&) 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 = 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);
|
||||
|
||||
// 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.set(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.set(BOOST_FUNCTION_TARGET_FIX(&) write_five);
|
||||
BOOST_TEST(v2);
|
||||
|
||||
// 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);
|
||||
|
||||
// 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 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);
|
||||
i0.clear();
|
||||
BOOST_TEST(!i0);
|
||||
|
||||
// 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);
|
||||
i1.clear();
|
||||
BOOST_TEST(!i1);
|
||||
}
|
||||
|
||||
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<std::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 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::function<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;
|
||||
}
|
||||
@ -1,35 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.hpp>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
using namespace std;
|
||||
using namespace boost;
|
||||
|
||||
int
|
||||
test_main(int, char*[])
|
||||
{
|
||||
function<int> f1;
|
||||
function<int> f2;
|
||||
|
||||
if (f1 == f2) {
|
||||
}
|
||||
|
||||
BOOST_CRITICAL_ERROR("This should not have compiled.");
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,34 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.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*[])
|
||||
{
|
||||
function<int> f1;
|
||||
f1 = bad_fn;
|
||||
|
||||
BOOST_CRITICAL_ERROR("This should not have compiled.");
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,60 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.hpp>
|
||||
#include <cassert>
|
||||
#include <functional>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
struct id_mixin
|
||||
{
|
||||
id_mixin(const id_mixin& rhs) : id(rhs.id) {}
|
||||
id_mixin& operator=(const id_mixin& rhs){id = rhs.id; return *this;}
|
||||
id_mixin(int i = 0){ id = i;}
|
||||
int id;
|
||||
};
|
||||
|
||||
static int do_plus(int x, int y) { return x+y; }
|
||||
|
||||
typedef boost::function<int,int,int>::mixin<id_mixin>::type func;
|
||||
|
||||
int test_main(int, char*[])
|
||||
{
|
||||
func f(id_mixin(3));
|
||||
f = std::plus<int>();
|
||||
BOOST_TEST(f.id == 3);
|
||||
|
||||
f = &do_plus;
|
||||
BOOST_TEST(f.id == 3);
|
||||
|
||||
f.clear();
|
||||
f.id = 7;
|
||||
BOOST_TEST(f.id == 7);
|
||||
|
||||
func g(f);
|
||||
BOOST_TEST(g.id == 7);
|
||||
|
||||
f.id = 21;
|
||||
BOOST_TEST(f.id == 21);
|
||||
|
||||
boost::swap(f,g);
|
||||
BOOST_TEST(f.id == 7);
|
||||
BOOST_TEST(g.id == 21);
|
||||
|
||||
g = f;
|
||||
BOOST_TEST(g.id == 7);
|
||||
return 0;
|
||||
}
|
||||
@ -1,47 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.hpp>
|
||||
#include <cassert>
|
||||
#include <iostream>
|
||||
#include <functional>
|
||||
#include <boost/function.hpp>
|
||||
|
||||
using namespace std;
|
||||
using namespace boost;
|
||||
|
||||
struct counting_policy
|
||||
{
|
||||
static int count;
|
||||
|
||||
void precall(const function_base*) { count++; }
|
||||
void postcall(const function_base*) { count+=2; }
|
||||
};
|
||||
|
||||
int counting_policy::count = 0;
|
||||
|
||||
int
|
||||
test_main(int, char*[])
|
||||
{
|
||||
function<int, int, int>::policy<counting_policy>::type f;
|
||||
|
||||
f = plus<int>();
|
||||
|
||||
BOOST_TEST(5 == f(2,3));
|
||||
BOOST_TEST(counting_policy::count==3);
|
||||
|
||||
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
|
||||
@ -1,47 +0,0 @@
|
||||
// Boost.Function library
|
||||
|
||||
// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
|
||||
//
|
||||
// Permission to copy, use, sell and distribute this software is granted
|
||||
// provided this copyright notice appears in all copies.
|
||||
// Permission to modify the code and to distribute modified code is granted
|
||||
// provided this copyright notice appears in all copies, and a notice
|
||||
// that the code was modified is included with the copyright notice.
|
||||
//
|
||||
// This software is provided "as is" without express or implied warranty,
|
||||
// and with no claim as to its suitability for any purpose.
|
||||
|
||||
// For more information, see http://www.boost.org
|
||||
|
||||
#define BOOST_INCLUDE_MAIN
|
||||
#include <boost/test/test_tools.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*)
|
||||
{
|
||||
}
|
||||
};
|
||||
|
||||
namespace boost {
|
||||
template<>
|
||||
struct is_stateless<stateless_integer_add> {
|
||||
BOOST_STATIC_CONSTANT(bool, value = true);
|
||||
};
|
||||
}
|
||||
|
||||
int test_main(int, char*[])
|
||||
{
|
||||
boost::function<int, int, int> f;
|
||||
f = stateless_integer_add();
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user