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<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Numeric Properties</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><meta name="keywords" content=" ISO C++ , library " /><link rel="home" href="../spine.html" title="The GNU C++ Library Documentation" /><link rel="up" href="fundamental_types.html" title="Chapter 4. Types" /><link rel="prev" href="fundamental_types.html" title="Chapter 4. Types" /><link rel="next" href="bk01pt02ch04s03.html" title="NULL" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Numeric Properties</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="fundamental_types.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Types</th><td width="20%" align="right"> <a accesskey="n" href="bk01pt02ch04s03.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Numeric Properties"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="manual.support.types.numeric_limits"></a>Numeric Properties</h2></div></div></div><p> The header <code class="filename">limits</code> defines traits classes to give access to various implementation defined-aspects of the fundamental types. The traits classes -- fourteen in total -- are all specializations of the template class <code class="classname">numeric_limits</code>, documented <a class="ulink" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a00593.html" target="_top">here</a> and defined as follows: </p><pre class="programlisting"> template<typename T> struct class { static const bool is_specialized; static T max() throw(); static T min() throw(); static const int digits; static const int digits10; static const bool is_signed; static const bool is_integer; static const bool is_exact; static const int radix; static T epsilon() throw(); static T round_error() throw(); static const int min_exponent; static const int min_exponent10; static const int max_exponent; static const int max_exponent10; static const bool has_infinity; static const bool has_quiet_NaN; static const bool has_signaling_NaN; static const float_denorm_style has_denorm; static const bool has_denorm_loss; static T infinity() throw(); static T quiet_NaN() throw(); static T denorm_min() throw(); static const bool is_iec559; static const bool is_bounded; static const bool is_modulo; static const bool traps; static const bool tinyness_before; static const float_round_style round_style; }; </pre></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="fundamental_types.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="fundamental_types.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="bk01pt02ch04s03.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 4. Types </td><td width="20%" align="center"><a accesskey="h" href="../spine.html">Home</a></td><td width="40%" align="right" valign="top"> NULL</td></tr></table></div></body></html>