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-rw-r--r--doc/manual/expressions/builtins.xml10
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml
index 14da1c63e..5e88b8856 100644
--- a/doc/manual/expressions/builtins.xml
+++ b/doc/manual/expressions/builtins.xml
@@ -600,6 +600,16 @@ x: x + 456</programlisting>
</varlistentry>
+ <varlistentry><term><function>builtins.isFloat</function>
+ <replaceable>e</replaceable></term>
+
+ <listitem><para>Return <literal>true</literal> if
+ <replaceable>e</replaceable> evaluates to a float, and
+ <literal>false</literal> otherwise.</para></listitem>
+
+ </varlistentry>
+
+
<varlistentry><term><function>builtins.isBool</function>
<replaceable>e</replaceable></term>