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Add \Q, \E and \K to the PCRE escape sequences #5964

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Merged
lacatoire merged 2 commits into from
Oct 19, 2026
Merged

Add \Q, \E and \K to the PCRE escape sequences #5964

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9efa590
Add \Q, \E and \K to the PCRE escape sequences
qodelicious Oct 18, 2026
4a86131
Use simpara for the sequences intro
qodelicious Oct 18, 2026
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19 changes: 19 additions & 0 deletions reference/pcre/pattern.syntax.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -610,6 +610,25 @@
<function>preg_match</function>. It differs from <literal>\A</literal>
when the value of <parameter>offset</parameter> is non-zero.
</para>
<simpara>
Backslash is also used for the following sequences:
</simpara>
<para>
<variablelist>
<varlistentry>
<term><emphasis>\Q</emphasis></term>
<listitem><simpara>start of a quoted sequence, metacharacters up to <literal>\E</literal> are treated as literals</simpara></listitem>
</varlistentry>
<varlistentry>
<term><emphasis>\E</emphasis></term>
<listitem><simpara>end of a quoted sequence started by <literal>\Q</literal></simpara></listitem>
</varlistentry>
<varlistentry>
<term><emphasis>\K</emphasis></term>
<listitem><simpara>reset the start of the reported match</simpara></listitem>
</varlistentry>
</variablelist>
</para>

<para>
<literal>\Q</literal> and <literal>\E</literal> can be used to ignore
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