SI-7312 @deprecatedInheritance now ignores same-file subclasses

This allows us to deprecate external inheritances as a prelude
to sealing a class, without enduring the warnings ourselved in
interlude.

2 files changed, 23 insertions, 0 deletions

diff --git a/test/files/pos/t6162-inheritance.flags b/test/files/pos/t6162-inheritance.flags
new file mode 100644
index 0000000000..c6bfaf1f64
--- /dev/null
+++ b/test/files/pos/t6162-inheritance.flags
@@ -0,0 +1 @@
+-deprecation -Xfatal-warnings
diff --git a/test/files/pos/t6162-inheritance.scala b/test/files/pos/t6162-inheritance.scala
new file mode 100644
index 0000000000..fca751edab
--- /dev/null
+++ b/test/files/pos/t6162-inheritance.scala
@@ -0,0 +1,22 @@
+package scala.t6126
+
+// Don't warn about inheritance in the same file.
+// We might use that as a prelude to sealing a class.
+
+@deprecatedInheritance("`Foo` will be made final in a future version.", "2.10.0")
+class Foo
+
+class SubFoo extends Foo
+
+@deprecatedInheritance()
+trait T
+
+object SubT extends T
+
+@deprecatedInheritance()
+trait S
+
+object O {
+  new S {
+  }
+}