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<p class="MsoNormal">Hi – there is a countLeadingZeros function. It applies to instances of FiniteBits, such as Int (a fixed bit-size integer):</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">GHCi, version 8.10.7: https://www.haskell.org/ghc/ :? for help<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">Loaded package environment from C:\Users\David\AppData\Roaming\ghc\x86_64-mingw32-8.10.7\environments\default<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">> :m +Data.Bits<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">> countLeadingZeros (23 :: Int)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">59<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The Integer type represents unbounded integers, so countLeadingZeros doesn’t really make sense.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">(ps. you can seach for functions like countLeadingZeros on <a href="https://hoogle.haskell.org/">
Hoogle</a>).</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hope that helps, David.</p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0cm"><b>From: </b><a href="mailto:james.faure@epitech.eu">james faure</a><br>
<b>Sent: </b>13 November 2021 00:16<br>
<b>To: </b><a href="mailto:haskell-cafe@haskell.org">haskell-cafe@haskell.org</a><br>
<b>Subject: </b>[Haskell-cafe] clz / bsr functions on Integer</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Why is there no `countLeadingZeros` function for Integer? This seems particularly strange because gmp provides </span><em><span style="font-size:13.5pt;color:black">mp_bitcnt_t</span></em><span style="font-size:13.5pt;font-family:"Times New Roman",serif;color:black"> <strong>mpz_scan0</strong> <em>(const
mpz_t </em><var>op</var><em>, mp_bitcnt_t </em><var>starting_bit</var><em>)</em></span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;color:black">More importantly, what is the recommended way to access it?</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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