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-rw-r--r--doc/sphinx/addendum/implicit-coercions.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/sphinx/addendum/implicit-coercions.rst b/doc/sphinx/addendum/implicit-coercions.rst
index c3b197288f..19b33f0d90 100644
--- a/doc/sphinx/addendum/implicit-coercions.rst
+++ b/doc/sphinx/addendum/implicit-coercions.rst
@@ -165,6 +165,12 @@ Declaring Coercions
convertible with existing ones when they have coercions that don't satisfy
the uniform inheritance condition.
+ .. warn:: ... is not definitionally an identity function.
+
+ If a coercion path has the same source and target class, that is said to be
+ circular. When a new circular coercion path is not convertible with the
+ identity function, it will be reported as ambiguous.
+
.. cmdv:: Local Coercion @qualid : @class >-> @class
Declares the construction denoted by :token:`qualid` as a coercion local to