diff --git a/doc/efun/to_struct b/doc/efun/to_struct
new file mode 100644
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+++ b/doc/efun/to_struct
@@ -0,0 +1,47 @@
+SYNOPSIS
+        mixed to_struct(mixed *|mapping data)
+        mixed to_struct(mixed *|mapping data, struct template)
+        mixed to_struct(struct data)
+        mixed to_struct(struct data, struct template)
+
+DESCRIPTION
+        The given array, mapping or struct <data> is returned as a struct.
+        If a <template> struct is given, the returned struct is of the same
+        type. Without a template, an anonymous struct is returned in case of
+        arrays and mappings and in case of structs <data> is returned
+        unchanged.
+
+        If <data> is an array, its elements are assigned in order to the
+        resulting struct. For an anonymous struct, all elements of <data>
+        are assigned, for a templated struct only as many as fit into
+        the struct.
+
+        If <data> is a mapping and no template is given, the resulting
+        anonymous struct contains all elements from <data> with a string
+        key; the key name is used as struct member name.
+
+        If <data> is a mapping and a template is given, the struct
+        member names are used as keys for lookups in <data>; the found
+        data is assigned to the struct members.
+
+        If <data> is a struct and a template is given, a struct of the type
+        of template is created and all members from <data> are copied to the
+        new struct, which exist in both structs. This conversion is only
+        allowed between a struct and one of its base structs or a base struct
+        and one of its children. Otherwise an error is raised.
+
+        Neither <data> nor <template> will be changed in this process - the
+        result is a new struct value. The actual value of <template> does not
+        matter, only its type.
+
+        Since the returned struct can't be known at compile time, the
+        efun is declared to return 'mixed'.
+
+HISTORY
+        Introduced in LDMud 3.3.250 .
+        LDMud 3.3.344 added the template argument.
+        LDMud 3.3.433 added the conversion from mappings.
+        LDMud 3.3.720 added the conversion of structs into another struct.
+
+SEE ALSO
+        to_array(E), to_string(E), mkmapping(E), structs(LPC)