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