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-rw-r--r--book/src/blacklisting.md4
1 files changed, 4 insertions, 0 deletions
diff --git a/book/src/blacklisting.md b/book/src/blacklisting.md
index 990947ab..3553d8b2 100644
--- a/book/src/blacklisting.md
+++ b/book/src/blacklisting.md
@@ -8,6 +8,10 @@ appear in the bindings at
all, [make it opaque](./opaque.html) instead of
blacklisting it.)
+Blacklisted types are pessimistically assumed not to be able to `derive` any
+traits, which can transitively affect other types' ability to `derive` traits or
+not.
+
### Library
* [`bindgen::Builder::hide_type`](https://docs.rs/bindgen/0.23.1/bindgen/struct.Builder.html#method.hide_type)