<!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>Data.UUID.V1</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Data-UUID-V1.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">uuid-1.2.13: For creating, comparing, parsing and printing Universally Unique Identifiers</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Portability</th><td>portable</td></tr><tr><th>Stability</th><td>experimental</td></tr><tr><th>Maintainer</th><td>aslatter@gmail.com</td></tr><tr><th>Safe Haskell</th><td>Safe-Infered</td></tr></table><p class="caption">Data.UUID.V1</p></div><div id="description"><p class="caption">Description</p><div class="doc"><p>RFC 4122 Version 1 UUID state machine.
</p><p>The generated UUID is based on the hardware MAC
address and the system clock.
</p><p>If we cannot lookup the MAC address we seed the
generator with a psuedo-random number.
</p></div></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><a href="#v:nextUUID">nextUUID</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.5.0.0/System-IO.html#t:IO">IO</a> (<a href="/usr/share/doc/ghc/html/libraries/base-4.5.0.0/Data-Maybe.html#t:Maybe">Maybe</a> <a href="Data-UUID.html#t:UUID">UUID</a>)</li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><a name="v:nextUUID" class="def">nextUUID</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.5.0.0/System-IO.html#t:IO">IO</a> (<a href="/usr/share/doc/ghc/html/libraries/base-4.5.0.0/Data-Maybe.html#t:Maybe">Maybe</a> <a href="Data-UUID.html#t:UUID">UUID</a>)<a href="src/Data-UUID-V1.html#nextUUID" class="link">Source</a></p><div class="doc"><p>Returns a new UUID derived from the local hardware MAC
address and the current system time.
Is generated according to the Version 1 UUID sepcified in
RFC 4122.
</p><p>Returns <code><a href="/usr/share/doc/ghc/html/libraries/base-4.5.0.0/Data-Maybe.html#v:Nothing">Nothing</a></code> if you request UUIDs too quickly.
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