Merge pull request #13419 from dotty-staging/add-regression-tests-for-experimental

Add regression tests

Author: anatoliykmetyuk

tests/neg-custom-args/no-experimental/experimental-erased.scala

@@ -0,0 +1,7 @@
+import language.experimental.erasedDefinitions // error
+import annotation.experimental
+
+@experimental
+erased class CanThrow[-E <: Exception]
+
+def other = 1

tests/pos/experimental-erased-2.scala

@@ -0,0 +1,8 @@
+import language.experimental.erasedDefinitions
+import annotation.experimental
+
+@experimental object Test:
+
+  erased class CanThrow[-E <: Exception]
+
+  def other = 1

tests/pos/experimental-erased.scala

@@ -0,0 +1,11 @@
+import language.experimental.erasedDefinitions
+import annotation.experimental
+
+@experimental
+erased class CanThrow[-E <: Exception](val i: Int = 0)
+
+@experimental
+object Foo
+
+@experimental
+def bar = 1