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<html>
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<title>Getting Started</title>
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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_localfunction.getting_started"></a><a class="link" href="getting_started.html" title="Getting Started">Getting Started</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="getting_started.html#boost_localfunction.getting_started.this_documentation">This
Documentation</a></span></dt>
<dt><span class="section"><a href="getting_started.html#boost_localfunction.getting_started.compilers_and_platforms">Compilers
and Platforms</a></span></dt>
<dt><span class="section"><a href="getting_started.html#boost_localfunction.getting_started.installation">Installation</a></span></dt>
</dl></div>
<p>
This section explains how to setup a system to use this library.
</p>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_localfunction.getting_started.this_documentation"></a><a class="link" href="getting_started.html#boost_localfunction.getting_started.this_documentation" title="This Documentation">This
Documentation</a>
</h3></div></div></div>
<p>
Programmers should have enough knowledge to use this library after reading
the <a class="link" href="../index.html#boost_localfunction.introduction" title="Introduction">Introduction</a>,
<a class="link" href="getting_started.html" title="Getting Started">Getting Started</a>,
and <a class="link" href="tutorial.html" title="Tutorial">Tutorial</a> sections.
The <a class="link" href="advanced_topics.html" title="Advanced Topics">Advanced Topics</a>
and <a href="../reference.html" target="_top">Reference</a> sections can be consulted
at a later point to gain a more advanced knowledge of the library. All the
other sections of this documentation can be considered optional.
</p>
<p>
Some footnotes are marked by the word "<span class="bold"><strong>Rationale</strong></span>".
They explain reasons behind decisions made during the design and implementation
of this library.
</p>
<p>
In most of the examples presented in this documentation, the Boost.Detail/LightweightTest
(<code class="literal">boost/detail/lightweight_test.hpp</code>) macro <code class="computeroutput"><span class="identifier">BOOST_TEST</span></code> is used to check correctness
conditions. The <code class="computeroutput"><span class="identifier">BOOST_TEST</span></code>
macro is conceptually similar to <code class="computeroutput"><span class="identifier">assert</span></code>
but a failure of the checked condition does not abort the program, instead
it makes <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">report_errors</span></code> return a non-zero program
exit code. <a href="#ftn.boost_localfunction.getting_started.this_documentation.f0" class="footnote" name="boost_localfunction.getting_started.this_documentation.f0"><sup class="footnote">[3]</sup></a>
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_localfunction.getting_started.compilers_and_platforms"></a><a class="link" href="getting_started.html#boost_localfunction.getting_started.compilers_and_platforms" title="Compilers and Platforms">Compilers
and Platforms</a>
</h3></div></div></div>
<p>
The implementation of this library uses preprocessor and template meta-programming
(as supported by <a href="http://www.boost.org/libs/preprocessor" target="_top">Boost.Preprocessor</a>
and <a href="http://www.boost.org/libs/mpl" target="_top">Boost.MPL</a>), templates
with partial specializations and function pointers (similarly to <a href="http://www.boost.org/libs/function" target="_top">Boost.Function</a>),
and automatic type deduction (as supported by <a href="http://www.boost.org/libs/typeof" target="_top">Boost.Typeof</a>).
The authors originally developed and tested the library on:
</p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
GNU Compiler Collection (GCC) C++ 4.5.1 on Ubuntu Linux 10.
</li>
<li class="listitem">
GCC 4.3.4 and 4.5.3 (with and without <a href="http://www.open-std.org/JTC1/SC22/WG21/" target="_top">C++11</a>
features enabled <code class="computeroutput"><span class="special">-</span><span class="identifier">std</span><span class="special">=</span><span class="identifier">c</span><span class="special">++</span><span class="number">0</span><span class="identifier">x</span></code>)
on Cygwin.
</li>
<li class="listitem">
Miscrosoft Visual C++ (MSVC) 8.0 on Windows XP and Windows 7.
</li>
</ol></div>
<p>
See the library <a href="http://www.boost.org/development/tests/release/developer/local_function.html" target="_top">regressions
test results</a> for detailed information on supported compilers and
platforms.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_localfunction.getting_started.installation"></a><a class="link" href="getting_started.html#boost_localfunction.getting_started.installation" title="Installation">Installation</a>
</h3></div></div></div>
<p>
This library is composed of header files only. Therefore there is no pre-compiled
object file which needs to be installed or linked. Programmers can simply
instruct the C++ compiler where to find the library header files (<code class="computeroutput"><span class="special">-</span><span class="identifier">I</span></code> option
for GCC, <code class="computeroutput"><span class="special">/</span><span class="identifier">I</span></code>
option for MSVC, etc) and they can start compiling code using this library.
</p>
<p>
The library implementation uses <a href="http://www.boost.org/libs/typeof" target="_top">Boost.Typeof</a>
to automatically deduce the types of bound variables (see the <a class="link" href="tutorial.html" title="Tutorial">Tutorial</a>
section). In order to compile code in type-of emulation mode, all types should
be properly registered using <code class="computeroutput"><span class="identifier">BOOST_TYPEOF_REGISTER_TYPE</span></code>
and <code class="computeroutput"><span class="identifier">BOOST_TYPEOF_REGISTER_TEMPLATE</span></code>,
or appropriate <a href="http://www.boost.org/libs/typeof" target="_top">Boost.Typeof</a>
headers should be included (see the source code of most examples presented
in this documentation).
</p>
<p>
The followings are part of the library private API, they are not documented,
and they should not be directly used by programmers: <a href="#ftn.boost_localfunction.getting_started.installation.f0" class="footnote" name="boost_localfunction.getting_started.installation.f0"><sup class="footnote">[4]</sup></a>
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Any symbol defined by files within the <code class="literal">boost/local_function/aux_/</code>
or <code class="literal">boost/local_function/detail/</code> directory (these header
files should not be directly included by programmers).
</li>
<li class="listitem">
Any symbol within the <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">local_function</span><span class="special">::</span><span class="identifier">aux</span></code>
or <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">local_function</span><span class="special">::</span><span class="identifier">detail</span></code> namespace.
</li>
<li class="listitem">
Any symbol prefixed by <code class="computeroutput"><span class="identifier">boost_local_function_aux_</span><span class="special">...</span></code> or <code class="computeroutput"><span class="identifier">boost_local_function_detail_</span><span class="special">...</span></code> (regardless of its namespace).
</li>
<li class="listitem">
Any symbol prefixed by <code class="computeroutput"><span class="identifier">BOOST_LOCAL_FUNCTION_AUX_</span><span class="special">...</span></code> or <code class="computeroutput"><span class="identifier">BOOST_LOCAL_FUNCTION_DETAIL_</span><span class="special">...</span></code> (regardless of its namespace).
</li>
</ul></div>
<p>
Some of the library behaviour can be changed at compile-time by defining
special <span class="emphasis"><em>configuration macros</em></span>. If a configuration macro
is left undefined, the library will use an appropriate default value for
it. All configuration macros are defined in the header file <code class="computeroutput">boost/local_function/config.hpp</code>.
It is strongly recommended not to change the library configuration macro
definitions unless strictly necessary.
</p>
</div>
<div class="footnotes">
<br><hr style="width:100; text-align:left;margin-left: 0">
<div id="ftn.boost_localfunction.getting_started.this_documentation.f0" class="footnote"><p><a href="#boost_localfunction.getting_started.this_documentation.f0" class="para"><sup class="para">[3] </sup></a>
<span class="bold"><strong>Rationale.</strong></span> Using Boost.Detail/LightweightTest
allows to add the examples to the library regression tests so to make sure
that they always compile and run correctly.
</p></div>
<div id="ftn.boost_localfunction.getting_started.installation.f0" class="footnote"><p><a href="#boost_localfunction.getting_started.installation.f0" class="para"><sup class="para">[4] </sup></a>
<span class="bold"><strong>Rationale.</strong></span> This library concatenates symbols
specified by the programmers (e.g., the local function name) with other
symbols (e.g., special prefixes or file line numbers) to make internal
symbols with unique names to avoid name clashes. These symbols are separated
by the letter "<code class="computeroutput"><span class="identifier">X</span></code>"
when they are concatenated so they read more easily during debugging (the
underscore character "<code class="computeroutput"><span class="identifier">_</span></code>"
could not be used instead of the letter "<code class="computeroutput"><span class="identifier">X</span></code>"
because if the original symbols already contained a leading or trailing
underscore, the concatenation could result in a symbol with double underscores
"<code class="computeroutput"><span class="identifier">__</span></code>" which is
reserved by the C++ standard). The "aux" symbols are private
to this library while the "detail" symbols may be used within
Boost by other libraries but they are still not part of this library public
API.
</p></div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2009-2012 Lorenzo
Caminiti<p>
Distributed under the Boost Software License, Version 1.0 (see accompanying
file LICENSE_1_0.txt or a copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
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