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| <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 V1.74.0" /><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" lang="en" xml:lang="en"><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/structstd_1_1numeric__limits.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; |
| }; |
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