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59 lines
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<title>Summary</title>
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<a accesskey="p" href="solution.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../introduction.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="requirements.html"><img src="../images/next.png" alt="Next"></a>
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<div class="titlepage"><div><div><h3 class="title">
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<a name="safe_numerics.introduction.summary"></a>Summary</h3></div></div></div>
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<p>Using techniques of C++ including overloading, template
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metaprogramming, and others, this library implements special versions of
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int, unsigned, etc. named <code class="computeroutput">safe<int></code>,
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<code class="computeroutput">safe<unsigned int></code> etc. These behave exactly like the
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original ones EXCEPT that expressions involving these types are checked to
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guarantee any possible arithmetic errors are trapped at compile time (if
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possible) or at runtime. Since these types are meant to be "drop-in"
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replacements - they function in all other ways the same as the built-in
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types they are meant to replace. So things which are legal - such as
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assigning an signed to unsigned value are not trapped at compile time - as
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they are legal C/C++ code - but rather checked at runtime to trap the case
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where this (legal) operation would lead to an arithmetically incorrect
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result.</p>
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<p>Note that the library addresses arithmetical errors generated by
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straightforward C/C++ expressions. Some of these arithmetic errors are
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defined as conforming to C/C++ standard while others are not. So it's
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misleading to characterize this library as addressing undefined behavior
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of C/C++ numeric expressions.</p>
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<td align="right"><div class="copyright-footer">Copyright © 2012 Robert Ramey<p><a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">Subject to Boost
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Software License</a></p>
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