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94 lines
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="range.portability"></a><a class="link" href="portability.html" title="Portability">Portability</a>
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</h2></div></div></div>
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<p>
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A huge effort has been made to port the library to as many compilers as possible.
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</p>
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<p>
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Full support for built-in arrays require that the compiler supports class template
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partial specialization. For non-conforming compilers there might be a chance
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that it works anyway thanks to workarounds in the type traits library. Visual
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C++ 6/7.0 has a limited support for arrays: as long as the arrays are of built-in
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type it should work.
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</p>
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<p>
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Notice also that some compilers cannot do function template ordering properly.
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In that case one must rely of <a class="link" href="reference/concept_implementation/semantics/metafunctions.html" title="Metafunctions"><code class="computeroutput"><span class="identifier">range_iterator</span></code></a> and a single function
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definition instead of overloaded versions for const and non-const arguments.
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So if one cares about old compilers, one should not pass rvalues to the functions.
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</p>
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<p>
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For maximum portability you should follow these guidelines:
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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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do not use built-in arrays,
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</li>
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<li class="listitem">
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do not pass rvalues to <a class="link" href="reference/concept_implementation/semantics/functions.html" title="Functions"><code class="computeroutput"><span class="identifier">begin</span></code></a><code class="computeroutput"><span class="special">()</span></code>,
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<a class="link" href="reference/concept_implementation/semantics/functions.html" title="Functions"><code class="computeroutput"><span class="identifier">end</span></code></a><code class="computeroutput"><span class="special">()</span></code>
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and <a class="link" href="reference/utilities/iterator_range.html" title="Class iterator_range"><code class="computeroutput"><span class="identifier">iterator_range</span></code></a> Range constructors
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and assignment operators,
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</li>
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<li class="listitem">
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use <a class="link" href="reference/concept_implementation/semantics/functions.html" title="Functions"><code class="computeroutput"><span class="identifier">const_begin</span></code></a><code class="computeroutput"><span class="special">()</span></code>
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and <a class="link" href="reference/concept_implementation/semantics/functions.html" title="Functions"><code class="computeroutput"><span class="identifier">const_end</span></code></a><code class="computeroutput"><span class="special">()</span></code>
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whenever your code by intention is read-only; this will also solve most
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rvalue problems,
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</li>
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<li class="listitem">
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<p class="simpara">
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do not rely on ADL:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem">
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if you overload functions, include that header before the headers in
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this library,
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</li>
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<li class="listitem">
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put all overloads in namespace boost.
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</li>
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</ul></div>
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</li>
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</ol></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 © 2003 -2010 Thorsten Ottosen, Neil Groves<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 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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