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<h1>bitset_type
<small>Derived Type</small>
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<h3>Contents</h3>
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<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-all">all</a>
<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-any">any</a>
<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-bit_count">bit_count</a>
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<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-clear">clear</a>
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<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-flip_bit">flip_bit</a>
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<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-init">init</a>
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<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-output">output</a>
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<a class="list-group-item" href="../type/bitset_type.html#boundprocedure-read_bitset_string">read_bitset_string</a>
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<h2>
type, public :: bitset_type</h2>
<p>Parent type for bitset_64 and bitset_large (<a href="../page/specs/stdlib_bitsets.html#the-stdlib_bitsets-derived-types">Specification</a>)</p>
<br>
<section>
<h2>Type-Bound Procedures</h2>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-all"></span>
<h3>
procedure(all_abstract), public, deferred, pass(self) ::
<strong>all</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
elemental function all_abstract(self) result(all)
<small>Prototype</small></h3>
<p>Returns <code>.true.</code> if all bits in <code>self</code> are 1, <code>.false.</code> otherwise.</p>
<h4 id="example">Example</h4>
<div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="k">program </span><span class="n">example_all</span>
<span class="w"> </span><span class="k">use </span><span class="n">stdlib_bitsets</span>
<span class="w"> </span><span class="kt">character</span><span class="p">(</span><span class="o">*</span><span class="p">),</span><span class="w"> </span><span class="k">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="n">bits_all</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'111111111111111111111111111111111'</span>
<span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">bitset_64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">set0</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">from_string</span><span class="p">(</span><span class="w"> </span><span class="n">bits_all</span><span class="w"> </span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">bits</span><span class="p">(</span><span class="n">set0</span><span class="p">)</span><span class="w"> </span><span class="o">/=</span><span class="w"> </span><span class="mi">33</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k"> error stop</span><span class="w"> </span><span class="s2">"FROM_STRING failed to interpret "</span><span class="w"> </span><span class="o">//</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="s1">'BITS_ALL'</span><span class="n">s</span><span class="w"> </span><span class="n">size</span><span class="w"> </span><span class="n">properly</span><span class="p">.</span><span class="s2">"</span>
<span class="s2"> else if ( .not. set0 % all() ) then</span>
<span class="s2"> error stop "</span><span class="n">FROM_STRING</span><span class="w"> </span><span class="n">failed</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">interpret</span><span class="s2">" // &</span>
<span class="s2"> "</span><span class="n">BITS_ALL</span><span class="err">'</span><span class="n">s</span><span class="w"> </span><span class="k">value </span><span class="n">properly</span><span class="p">.</span><span class="s2">"</span>
<span class="s2"> else</span>
<span class="s2"> write(*,*) "</span><span class="n">FROM_STRING</span><span class="w"> </span><span class="n">transferred</span><span class="w"> </span><span class="n">BITS_ALL</span><span class="w"> </span><span class="n">properly</span><span class="s2">" // &</span>
<span class="s2"> "</span><span class="w"> </span><span class="n">into</span><span class="w"> </span><span class="n">set0</span><span class="p">.</span><span class="err">"</span>
<span class="w"> </span><span class="k">end if</span>
<span class="k"> end program </span><span class="n">example_all</span>
</code></pre></div>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
<h4>
Return Value
<small>logical</small>
</h4>
</li>
</ul>
</div>
</div>
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<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-any"></span>
<h3>
procedure(any_abstract), public, deferred, pass(self) ::
<strong>any</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
elemental function any_abstract(self) result(any)
<small>Prototype</small></h3>
<p>Returns <code>.true.</code> if any bit in <code>self</code> is 1, <code>.false.</code> otherwise.</p>
<h4 id="example">Example</h4>
<div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="k">program </span><span class="n">example_any</span>
<span class="w"> </span><span class="k">use </span><span class="n">stdlib_bitsets</span>
<span class="w"> </span><span class="kt">character</span><span class="p">(</span><span class="o">*</span><span class="p">),</span><span class="w"> </span><span class="k">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="n">bits_0</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'0000000000000000000'</span>
<span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">bitset_64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">set0</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">from_string</span><span class="p">(</span><span class="w"> </span><span class="n">bits_0</span><span class="w"> </span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="p">.</span><span class="nb">not</span><span class="p">.</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="nb">any</span><span class="p">()</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k"> write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s2">"FROM_STRING interpreted "</span><span class="w"> </span><span class="o">//</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="s2">"BITS_0's value properly."</span>
<span class="w"> </span><span class="k">end if</span>
<span class="k"> call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">set</span><span class="p">(</span><span class="mi">5</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="nb">any</span><span class="p">()</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k"> write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s2">"ANY interpreted SET0's value properly."</span>
<span class="w"> </span><span class="k">end if</span>
<span class="k"> end program </span><span class="n">example_any</span>
</code></pre></div>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
<h4>
Return Value
<small>logical</small>
</h4>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-bit_count"></span>
<h3>
procedure(bit_count_abstract), public, deferred, pass(self) ::
<strong>bit_count</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
elemental function bit_count_abstract(self) result(bit_count)
<small>Prototype</small></h3>
<p>Returns the number of non-zero bits in <code>self</code>.</p>
<h4 id="example">Example</h4>
<div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="k">program </span><span class="n">example_bit_count</span>
<span class="w"> </span><span class="k">use </span><span class="n">stdlib_bitsets</span>
<span class="w"> </span><span class="kt">character</span><span class="p">(</span><span class="o">*</span><span class="p">),</span><span class="w"> </span><span class="k">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="n">bits_0</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'0000000000000000000'</span>
<span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">bitset_64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">set0</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">from_string</span><span class="p">(</span><span class="w"> </span><span class="n">bits_0</span><span class="w"> </span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">bit_count</span><span class="p">()</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k"> write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s2">"FROM_STRING interpreted "</span><span class="w"> </span><span class="o">//</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="s2">"BITS_0's value properly."</span>
<span class="w"> </span><span class="k">end if</span>
<span class="k"> call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">set</span><span class="p">(</span><span class="mi">5</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">bit_count</span><span class="p">()</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k"> write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s2">"BIT_COUNT interpreted SET0's value properly."</span>
<span class="w"> </span><span class="k">end if</span>
<span class="k"> end program </span><span class="n">example_bit_count</span>
</code></pre></div>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
<h4>
Return Value
<small>integer(kind=bits_kind)</small>
</h4>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-bits"></span>
<h3>
procedure, public, pass(self) ::
<strong>bits</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
public elemental function <a href='../proc/bits.html'>bits</a>(self)
</h3>
<dl class="dl-horizontal">
<dt>License</dt><dd><a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-sa/4.0/80x15.png" /></a></dd>
<dt>Version</dt><dd>experimental</dd>
</dl>
<p>Returns the number of bit positions in <code>self</code>.</p>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
<h4>
Return Value
<small>integer(kind=bits_kind)</small>
</h4>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-clear"></span>
<h3>
generic, public ::
<strong>clear</strong> => <a href='/home/runner/work/stdlib/stdlib/API-doc/type/bitset_large.html#boundprocedure-clear_bit~2'>clear_bit</a>, <a href='/home/runner/work/stdlib/stdlib/API-doc/type/bitset_large.html#boundprocedure-clear_range~2'>clear_range</a>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
private interface clear_bit_large()
</h3>
<h4>Arguments</h4>
<em>None</em>
</li>
<li class="list-group-item">
<h3>
private interface clear_range_large()
</h3>
<h4>Arguments</h4>
<em>None</em>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-clear_bit"></span>
<h3>
procedure(clear_bit_abstract), public, deferred, pass(self) ::
<strong>clear_bit</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
elemental subroutine clear_bit_abstract(self, pos)
<small>Prototype</small></h3>
<p>Sets to zero the <code>pos</code> position in <code>self</code>. If <code>pos</code> is less than zero or
greater than <code>bits(self)-1</code> it is ignored.</p>
<h4 id="example">Example</h4>
<div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="k">program </span><span class="n">example_clear</span>
<span class="w"> </span><span class="k">use </span><span class="n">stdlib_bitsets</span>
<span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">bitset_large</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">set0</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">init</span><span class="p">(</span><span class="mi">166</span><span class="p">)</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="nb">not</span><span class="p">()</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="k">all</span><span class="p">()</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s1">'SET0 is properly initialized.'</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">clear</span><span class="p">(</span><span class="mi">165</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="p">.</span><span class="nb">not</span><span class="p">.</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">test</span><span class="p">(</span><span class="mi">165</span><span class="p">)</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s1">'Bit 165 is cleared.'</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">clear</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">164</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="k">none</span><span class="p">()</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s1">'All bits are cleared.'</span>
<span class="w"> </span><span class="k">end program </span><span class="n">example_clear</span>
</code></pre></div>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(inout)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer(kind=bits_kind),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>pos</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-clear_range"></span>
<h3>
procedure(clear_range_abstract), public, deferred, pass(self) ::
<strong>clear_range</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
pure subroutine clear_range_abstract(self, start_pos, stop_pos)
<small>Prototype</small></h3>
<p>Sets to zero all bits from the <code>start_pos</code> to <code>stop_pos</code> positions in <code>set</code>.
If <code>stop_pos < start_pos</code> then no bits are modified. Positions outside
the range 0 to <code>bits(self)-1</code> are ignored.</p>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(inout)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer(kind=bits_kind),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>start_pos</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer(kind=bits_kind),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>stop_pos</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-flip"></span>
<h3>
generic, public ::
<strong>flip</strong> => <a href='/home/runner/work/stdlib/stdlib/API-doc/type/bitset_large.html#boundprocedure-flip_bit~2'>flip_bit</a>, <a href='/home/runner/work/stdlib/stdlib/API-doc/type/bitset_large.html#boundprocedure-flip_range~2'>flip_range</a>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
private interface flip_bit_large()
</h3>
<h4>Arguments</h4>
<em>None</em>
</li>
<li class="list-group-item">
<h3>
private interface flip_range_large()
</h3>
<h4>Arguments</h4>
<em>None</em>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-flip_bit"></span>
<h3>
procedure(flip_bit_abstract), public, deferred, pass(self) ::
<strong>flip_bit</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
elemental subroutine flip_bit_abstract(self, pos)
<small>Prototype</small></h3>
<p>Flips the value at the <code>pos</code> position in <code>self</code>, provided the position is
valid. If <code>pos</code> is less than 0 or greater than <code>bits(self)-1</code>, no value is
changed.</p>
<h4 id="example">Example</h4>
<div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="k">program </span><span class="n">example_flip</span>
<span class="w"> </span><span class="k">use </span><span class="n">stdlib_bitsets</span>
<span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">bitset_large</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">set0</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">init</span><span class="p">(</span><span class="mi">166</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="k">none</span><span class="p">()</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s1">'SET0 is properly initialized.'</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">flip</span><span class="p">(</span><span class="mi">165</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">test</span><span class="p">(</span><span class="mi">165</span><span class="p">)</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s1">'Bit 165 is flipped.'</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">flip</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">164</span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="k">all</span><span class="p">()</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="w"> </span><span class="s1">'All bits are flipped.'</span>
<span class="w"> </span><span class="k">end program </span><span class="n">example_flip</span>
</code></pre></div>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(inout)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer(kind=bits_kind),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>pos</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-flip_range"></span>
<h3>
procedure(flip_range_abstract), public, deferred, pass(self) ::
<strong>flip_range</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
pure subroutine flip_range_abstract(self, start_pos, stop_pos)
<small>Prototype</small></h3>
<p>Flips all valid bits from the <code>start_pos</code> to the <code>stop_pos</code> positions in
<code>self</code>. If <code>stop_pos < start_pos</code> no bits are flipped. Positions less than
0 or greater than <code>bits(self)-1</code> are ignored.</p>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(inout)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer(kind=bits_kind),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>start_pos</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer(kind=bits_kind),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>stop_pos</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
</li>
</ul>
</div>
</div>
<div class="row">
<div class="card mt-3">
<div class="card-header codesum">
<span class="anchor" id="boundprocedure-from_string"></span>
<h3>
procedure(from_string_abstract), public, deferred, pass(self) ::
<strong>from_string</strong>
</h3>
</div>
<ul class="list-group">
<li class="list-group-item">
<h3>
subroutine from_string_abstract(self, string, status)
<small>Prototype</small></h3>
<p>Initializes the bitset <code>self</code> treating <code>string</code> as a binary literal
<code>status</code> may have the values:
* <code>success</code> - if no problems were found,
* <code>alloc_fault</code> - if allocation of the bitset failed
* <code>char_string_too_large_error</code> - if <code>string</code> was too large, or
* <code>char_string_invalid_error</code> - if string had an invalid character.</p>
<h4 id="example">Example</h4>
<div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="k">program </span><span class="n">example_from_string</span>
<span class="w"> </span><span class="k">use </span><span class="n">stdlib_bitsets</span>
<span class="w"> </span><span class="kt">character</span><span class="p">(</span><span class="o">*</span><span class="p">),</span><span class="w"> </span><span class="k">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="n">bits_all</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s1">'111111111111111111111111111111111'</span>
<span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">bitset_64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">set0</span>
<span class="w"> </span><span class="k">call </span><span class="n">set0</span><span class="w"> </span><span class="p">%</span><span class="w"> </span><span class="n">from_string</span><span class="p">(</span><span class="w"> </span><span class="n">bits_all</span><span class="w"> </span><span class="p">)</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">bits</span><span class="p">(</span><span class="n">set0</span><span class="p">)</span><span class="w"> </span><span class="o">/=</span><span class="w"> </span><span class="mi">33</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<span class="k"> error stop</span><span class="w"> </span><span class="s2">"FROM_STRING failed to interpret "</span><span class="w"> </span><span class="o">//</span><span class="w"> </span><span class="p">&</span>
<span class="w"> </span><span class="s1">'BITS_ALL'</span><span class="n">s</span><span class="w"> </span><span class="n">size</span><span class="w"> </span><span class="n">properly</span><span class="p">.</span><span class="s2">"</span>
<span class="s2"> else if ( .not. set0 % all() ) then</span>
<span class="s2"> error stop "</span><span class="n">FROM_STRING</span><span class="w"> </span><span class="n">failed</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">interpret</span><span class="s2">" // &</span>
<span class="s2"> "</span><span class="n">BITS_ALL</span><span class="err">'</span><span class="n">s</span><span class="w"> </span><span class="k">value </span><span class="n">properly</span><span class="p">.</span><span class="s2">"</span>
<span class="s2"> else</span>
<span class="s2"> write(*,*) "</span><span class="n">FROM_STRING</span><span class="w"> </span><span class="n">transferred</span><span class="w"> </span><span class="n">BITS_ALL</span><span class="w"> </span><span class="n">properly</span><span class="s2">" // &</span>
<span class="s2"> "</span><span class="w"> </span><span class="n">into</span><span class="w"> </span><span class="n">set0</span><span class="p">.</span><span class="err">"</span>
<span class="w"> </span><span class="k">end if</span>
<span class="k"> end program </span><span class="n">example_from_string</span>
</code></pre></div>
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th scope="col">Type</th>
<th scope="col">Intent</th><th scope="col">Optional</th> <th scope="col">Attributes</th>
<th scope="col"></th>
<th scope="col">Name</th>
<th scope="col"></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
class(<a href='bitset_type.html'>bitset_type</a>),
</td>
<td>intent(out)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>self</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
character(len=*),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>string</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
integer,
</td>
<td>intent(out),</td>
<td>optional</td> <td>
</td>
<td>::</td>
<td><strong>status</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
</li>
</ul>
</div>