Focus pin mut opaque message on Pin suggestion
In common usage the Pin<&mut T> is going to be the right fix most of the
time. In all of these cases the user is *also* going to receive a
suggestion to implement ExternType. That suggestion will appear pointing
to the opaque extern `type` item.
diff --git a/syntax/check.rs b/syntax/check.rs
index 65c0288..32d147b 100644
--- a/syntax/check.rs
+++ b/syntax/check.rs
@@ -188,7 +188,7 @@
cx.error(
ty,
format!(
- "mutable reference to C++ type requires a pin -- use Pin<&mut {}> or declare the type Trivial in a cxx::ExternType impl",
+ "mutable reference to C++ type requires a pin -- use Pin<&mut {}>",
requires_pin,
),
);
@@ -380,7 +380,7 @@
cx.error(
span,
format!(
- "mutable reference to opaque C++ type requires a pin -- use `self: Pin<&mut {}>` or declare the type Trivial in a cxx::ExternType impl",
+ "mutable reference to opaque C++ type requires a pin -- use `self: Pin<&mut {}>`",
receiver.ty.rust,
),
);