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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="intlchar.enumchartypes" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>IntlChar::enumCharTypes</refname>
<refpurpose>Enumerate all code points with their Unicode general categories</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="IntlChar">
<modifier>public</modifier> <modifier>static</modifier> <type>void</type><methodname>IntlChar::enumCharTypes</methodname>
<methodparam><type>callable</type><parameter>callback</parameter></methodparam>
</methodsynopsis>
<para>
Enumerates efficiently all code points with their Unicode general categories. This is useful for building data
structures, for enumerating all assigned code points, etc.
</para>
<para>
For each contiguous range of code points with a given general category ("character type"), the
<parameter>callback</parameter> function is called. Adjacent ranges have different types. The Unicode Standard
guarantees that the numeric value of the type is 0..31.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>callback</parameter></term>
<listitem>
<para>
The function that is to be called for each contiguous range of code points with the same general category.
The following three arguments will be passed into it:
<simplelist>
<member><type>int</type> <literal>$start</literal> - The starting code point of the range</member>
<member><type>int</type> <literal>$end</literal> - The ending code point of the range</member>
<member><type>int</type> <literal>$name</literal> - The category type (one of the <literal>IntlChar::CHAR_CATEGORY_*</literal> constants)</member>
</simplelist>
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title>Enumerating over a sample range of code points</title>
<programlisting role="php">
<![CDATA[
<?php
IntlChar::enumCharTypes(function($start, $end, $type) {
printf("U+%04x through U+%04x are in category %d\n", $start, $end, $type);
});
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
U+0000 through U+0020 are in category 15
U+0020 through U+0021 are in category 12
U+0021 through U+0024 are in category 23
U+0024 through U+0025 are in category 25
U+0025 through U+0028 are in category 23
U+0028 through U+0029 are in category 20
U+0029 through U+002a are in category 21
U+002a through U+002b are in category 23
U+002b through U+002c are in category 24
U+002c through U+002d are in category 23
U+002d through U+002e are in category 19
U+002e through U+0030 are in category 23
U+0030 through U+003a are in category 9
...
]]>
</screen>
</example>
</refsect1>
</refentry>
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