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<h4 class="subsubsection" id="Character-Set-Predicates_002fComparison-1"><span>6.6.4.1 Character Set Predicates/Comparison<a class="copiable-link" href="#Character-Set-Predicates_002fComparison-1"> &para;</a></span></h4>
<p>Use these procedures for testing whether an object is a character set,
or whether several character sets are equal or subsets of each other.
<code class="code">char-set-hash</code> can be used for calculating a hash value, maybe for
usage in fast lookup procedures.
</p>
<dl class="first-deffn">
<dt class="deffn" id="index-char_002dset_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-char_002dset_003f"> &para;</a></span></dt>
<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fp"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_p</strong> <var class="def-var-arguments">(obj)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fp"> &para;</a></span></dt>
<dd><p>Return <code class="code">#t</code> if <var class="var">obj</var> is a character set, <code class="code">#f</code>
otherwise.
</p></dd></dl>
<dl class="first-deffn">
<dt class="deffn" id="index-char_002dset_003d"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set=</strong> <var class="def-var-arguments">char_set &hellip;</var><a class="copiable-link" href="#index-char_002dset_003d"> &para;</a></span></dt>
<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005feq"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_eq</strong> <var class="def-var-arguments">(char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005feq"> &para;</a></span></dt>
<dd><p>Return <code class="code">#t</code> if all given character sets are equal.
</p></dd></dl>
<dl class="first-deffn">
<dt class="deffn" id="index-char_002dset_003c_003d"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set&lt;=</strong> <var class="def-var-arguments">char_set &hellip;</var><a class="copiable-link" href="#index-char_002dset_003c_003d"> &para;</a></span></dt>
<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fleq"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_leq</strong> <var class="def-var-arguments">(char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fleq"> &para;</a></span></dt>
<dd><p>Return <code class="code">#t</code> if every character set <var class="var">char_set</var>i is a subset
of character set <var class="var">char_set</var>i+1.
</p></dd></dl>
<dl class="first-deffn">
<dt class="deffn" id="index-char_002dset_002dhash"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-hash</strong> <var class="def-var-arguments">cs [bound]</var><a class="copiable-link" href="#index-char_002dset_002dhash"> &para;</a></span></dt>
<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fhash"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_hash</strong> <var class="def-var-arguments">(cs, bound)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fhash"> &para;</a></span></dt>
<dd><p>Compute a hash value for the character set <var class="var">cs</var>. If
<var class="var">bound</var> is given and non-zero, it restricts the
returned value to the range 0 &hellip; <var class="var">bound</var> - 1.
</p></dd></dl>
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