182 lines
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182 lines
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<title>Character-Set Algebra (Guile Reference Manual)</title>
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<div class="subsubsection-level-extent" id="Character_002dSet-Algebra">
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Next: <a href="Standard-Character-Sets.html" accesskey="n" rel="next">Standard Character Sets</a>, Previous: <a href="Querying-Character-Sets.html" accesskey="p" rel="prev">Querying Character Sets</a>, Up: <a href="Character-Sets.html" accesskey="u" rel="up">Character Sets</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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<h4 class="subsubsection" id="Character_002dSet-Algebra-1"><span>6.6.4.5 Character-Set Algebra<a class="copiable-link" href="#Character_002dSet-Algebra-1"> ¶</a></span></h4>
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<p>Character sets can be manipulated with the common set algebra operation,
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such as union, complement, intersection etc. All of these procedures
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provide side-effecting variants, which modify their character set
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argument(s).
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dadjoin"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-adjoin</strong> <var class="def-var-arguments">cs chr …</var><a class="copiable-link" href="#index-char_002dset_002dadjoin"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fadjoin"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_adjoin</strong> <var class="def-var-arguments">(cs, chrs)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fadjoin"> ¶</a></span></dt>
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<dd><p>Add all character arguments to the first argument, which must
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be a character set.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002ddelete"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-delete</strong> <var class="def-var-arguments">cs chr …</var><a class="copiable-link" href="#index-char_002dset_002ddelete"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fdelete"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_delete</strong> <var class="def-var-arguments">(cs, chrs)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fdelete"> ¶</a></span></dt>
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<dd><p>Delete all character arguments from the first argument, which
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must be a character set.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dadjoin_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-adjoin!</strong> <var class="def-var-arguments">cs chr …</var><a class="copiable-link" href="#index-char_002dset_002dadjoin_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fadjoin_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_adjoin_x</strong> <var class="def-var-arguments">(cs, chrs)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fadjoin_005fx"> ¶</a></span></dt>
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<dd><p>Add all character arguments to the first argument, which must
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be a character set.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002ddelete_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-delete!</strong> <var class="def-var-arguments">cs chr …</var><a class="copiable-link" href="#index-char_002dset_002ddelete_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fdelete_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_delete_x</strong> <var class="def-var-arguments">(cs, chrs)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fdelete_005fx"> ¶</a></span></dt>
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<dd><p>Delete all character arguments from the first argument, which
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must be a character set.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dcomplement"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-complement</strong> <var class="def-var-arguments">cs</var><a class="copiable-link" href="#index-char_002dset_002dcomplement"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fcomplement"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_complement</strong> <var class="def-var-arguments">(cs)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fcomplement"> ¶</a></span></dt>
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<dd><p>Return the complement of the character set <var class="var">cs</var>.
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</p></dd></dl>
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<p>Note that the complement of a character set is likely to contain many
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reserved code points (code points that are not associated with
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characters). It may be helpful to modify the output of
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<code class="code">char-set-complement</code> by computing its intersection with the set
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of designated code points, <code class="code">char-set:designated</code>.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dunion"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-union</strong> <var class="def-var-arguments">cs …</var><a class="copiable-link" href="#index-char_002dset_002dunion"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005funion"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_union</strong> <var class="def-var-arguments">(char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005funion"> ¶</a></span></dt>
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<dd><p>Return the union of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dintersection"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-intersection</strong> <var class="def-var-arguments">cs …</var><a class="copiable-link" href="#index-char_002dset_002dintersection"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fintersection"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_intersection</strong> <var class="def-var-arguments">(char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fintersection"> ¶</a></span></dt>
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<dd><p>Return the intersection of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002ddifference"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-difference</strong> <var class="def-var-arguments">cs1 cs …</var><a class="copiable-link" href="#index-char_002dset_002ddifference"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fdifference"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_difference</strong> <var class="def-var-arguments">(cs1, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fdifference"> ¶</a></span></dt>
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<dd><p>Return the difference of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dxor"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-xor</strong> <var class="def-var-arguments">cs …</var><a class="copiable-link" href="#index-char_002dset_002dxor"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fxor"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_xor</strong> <var class="def-var-arguments">(char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fxor"> ¶</a></span></dt>
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<dd><p>Return the exclusive-or of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002ddiff_002bintersection"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-diff+intersection</strong> <var class="def-var-arguments">cs1 cs …</var><a class="copiable-link" href="#index-char_002dset_002ddiff_002bintersection"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fdiff_005fplus_005fintersection"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_diff_plus_intersection</strong> <var class="def-var-arguments">(cs1, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fdiff_005fplus_005fintersection"> ¶</a></span></dt>
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<dd><p>Return the difference and the intersection of all argument
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character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dcomplement_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-complement!</strong> <var class="def-var-arguments">cs</var><a class="copiable-link" href="#index-char_002dset_002dcomplement_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fcomplement_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_complement_x</strong> <var class="def-var-arguments">(cs)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fcomplement_005fx"> ¶</a></span></dt>
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<dd><p>Return the complement of the character set <var class="var">cs</var>.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dunion_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-union!</strong> <var class="def-var-arguments">cs1 cs …</var><a class="copiable-link" href="#index-char_002dset_002dunion_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005funion_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_union_x</strong> <var class="def-var-arguments">(cs1, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005funion_005fx"> ¶</a></span></dt>
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<dd><p>Return the union of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dintersection_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-intersection!</strong> <var class="def-var-arguments">cs1 cs …</var><a class="copiable-link" href="#index-char_002dset_002dintersection_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fintersection_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_intersection_x</strong> <var class="def-var-arguments">(cs1, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fintersection_005fx"> ¶</a></span></dt>
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<dd><p>Return the intersection of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002ddifference_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-difference!</strong> <var class="def-var-arguments">cs1 cs …</var><a class="copiable-link" href="#index-char_002dset_002ddifference_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fdifference_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_difference_x</strong> <var class="def-var-arguments">(cs1, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fdifference_005fx"> ¶</a></span></dt>
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<dd><p>Return the difference of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002dxor_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-xor!</strong> <var class="def-var-arguments">cs1 cs …</var><a class="copiable-link" href="#index-char_002dset_002dxor_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fxor_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_xor_x</strong> <var class="def-var-arguments">(cs1, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fxor_005fx"> ¶</a></span></dt>
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<dd><p>Return the exclusive-or of all argument character sets.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_002dset_002ddiff_002bintersection_0021"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char-set-diff+intersection!</strong> <var class="def-var-arguments">cs1 cs2 cs …</var><a class="copiable-link" href="#index-char_002dset_002ddiff_002bintersection_0021"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fchar_005fset_005fdiff_005fplus_005fintersection_005fx"><span class="category-def">C Function: </span><span><strong class="def-name">scm_char_set_diff_plus_intersection_x</strong> <var class="def-var-arguments">(cs1, cs2, char_sets)</var><a class="copiable-link" href="#index-scm_005fchar_005fset_005fdiff_005fplus_005fintersection_005fx"> ¶</a></span></dt>
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<dd><p>Return the difference and the intersection of all argument
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character sets.
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</p></dd></dl>
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</div>
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<p>
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Next: <a href="Standard-Character-Sets.html">Standard Character Sets</a>, Previous: <a href="Querying-Character-Sets.html">Querying Character Sets</a>, Up: <a href="Character-Sets.html">Character Sets</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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