From 5e91a50eb28a292eb56b8d5e5a268c115ffdc86d Mon Sep 17 00:00:00 2001
From: Louis Pilfold <louis@lpil.uk>
Date: Wed, 20 Dec 2023 15:20:27 +0000
Subject: List lessons

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 lessons/src/lesson028_alternative_patterns/text.html | 17 +++++++++++++++++
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+<p>
+  Alternative patterns can be given for a case clause using the
+  <code>|</code> operator. If any of the patterns match then the clause matches.
+</p>
+<p>
+  When matching on multiple subjects there must be the same number of patterns
+  as there are subjects. Try removing one of the <code>_,</code> sub-patterns to
+  see the compile time error that is returned.
+</p>
+<p>
+  If a pattern defines a variable then all of the alternative patterns for that
+  clause must also define a variable with the same name and same type.
+</p>
+<p>
+  Currently it is not possible to have nested alternative patterns, so the
+  pattern <code>[1 | 2 | 3]</code> is not valid.
+</p>
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