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1 2 3 4 5 6 7 8 9 | <!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.Text.Internal.Unsafe.Shift</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-Text-Internal-Unsafe-Shift.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">text-1.2.2.0: An efficient packed Unicode text type.</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Copyright</th><td>(c) Bryan O'Sullivan 2009</td></tr><tr><th>License</th><td>BSD-style</td></tr><tr><th>Maintainer</th><td>bos@serpentine.com</td></tr><tr><th>Stability</th><td>experimental</td></tr><tr><th>Portability</th><td>GHC</td></tr><tr><th>Safe Haskell</th><td>None</td></tr><tr><th>Language</th><td>Haskell98</td></tr></table><p class="caption">Data.Text.Internal.Unsafe.Shift</p></div><div id="description"><p class="caption">Description</p><div class="doc"><p><em>Warning</em>: this is an internal module, and does not have a stable
API or name. Functions in this module may not check or enforce
preconditions expected by public modules. Use at your own risk!</p><p>Fast, unchecked bit shifting functions.</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"><span class="keyword">class</span> <a href="#t:UnsafeShift">UnsafeShift</a> a <span class="keyword">where</span><ul class="subs"><li><a href="#v:shiftL">shiftL</a> :: a -> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Int.html#t:Int">Int</a> -> a</li><li><a href="#v:shiftR">shiftR</a> :: a -> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Int.html#t:Int">Int</a> -> a</li></ul></li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><span class="keyword">class</span> <a name="t:UnsafeShift" class="def">UnsafeShift</a> a <span class="keyword">where</span> <a href="src/Data-Text-Internal-Unsafe-Shift.html#UnsafeShift" class="link">Source</a></p><div class="doc"><p>This is a workaround for poor optimisation in GHC 6.8.2. It
fails to notice constant-width shifts, and adds a test and branch
to every shift. This imposes about a 10% performance hit.</p><p>These functions are undefined when the amount being shifted by is
greater than the size in bits of a machine Int#.</p></div><div class="subs methods"><p class="caption">Methods</p><p class="src"><a name="v:shiftL" class="def">shiftL</a> :: a -> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Int.html#t:Int">Int</a> -> a <a href="src/Data-Text-Internal-Unsafe-Shift.html#shiftL" class="link">Source</a></p><p class="src"><a name="v:shiftR" class="def">shiftR</a> :: a -> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Int.html#t:Int">Int</a> -> a <a href="src/Data-Text-Internal-Unsafe-Shift.html#shiftR" class="link">Source</a></p></div><div class="subs instances"><p id="control.i:UnsafeShift" class="caption collapser" onclick="toggleSection('i:UnsafeShift')">Instances</p><div id="section.i:UnsafeShift" class="show"><table><tr><td class="src clearfix"><span class="inst-left"><a href="Data-Text-Internal-Unsafe-Shift.html#t:UnsafeShift">UnsafeShift</a> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Int.html#t:Int">Int</a></span> <a href="src/Data-Text-Internal-Unsafe-Shift.html#line-58" class="link">Source</a></td><td class="doc empty"> </td></tr><tr><td class="src clearfix"><span class="inst-left"><a href="Data-Text-Internal-Unsafe-Shift.html#t:UnsafeShift">UnsafeShift</a> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Word.html#t:Word16">Word16</a></span> <a href="src/Data-Text-Internal-Unsafe-Shift.html#line-37" class="link">Source</a></td><td class="doc empty"> </td></tr><tr><td class="src clearfix"><span class="inst-left"><a href="Data-Text-Internal-Unsafe-Shift.html#t:UnsafeShift">UnsafeShift</a> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Word.html#t:Word32">Word32</a></span> <a href="src/Data-Text-Internal-Unsafe-Shift.html#line-44" class="link">Source</a></td><td class="doc empty"> </td></tr><tr><td class="src clearfix"><span class="inst-left"><a href="Data-Text-Internal-Unsafe-Shift.html#t:UnsafeShift">UnsafeShift</a> <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.8.2.0/Data-Word.html#t:Word64">Word64</a></span> <a href="src/Data-Text-Internal-Unsafe-Shift.html#line-51" class="link">Source</a></td><td class="doc empty"> </td></tr></table></div></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.16.1</p></div></body></html>
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