Add more tests

Author: liufengyun

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

@@ -17,9 +17,43 @@ class Test1 {
         a == b
 }
 
-class Test1 {
-  import language.experimental.genericNumberLiterals // error
-  val x: BigInt = 13232202002020202020202
-  val y: BigInt = -0xaabb12345ACF12345AC
+class Test2 {
+  import scala.language.experimental.genericNumberLiterals // error
+  val x: BigInt = 13232202002020202020202  // error
+  val y: BigInt = -0xaabb12345ACF12345AC   // error
+}
+
+class Test3 {
+  import scala.language.experimental.namedTypeArguments // error
+  object Foo {
+    inline def f[S, T](x: S): T = ???
+    def g(x: Int) = f[T = Any](x)                 // error
+  }
+}
+
+class Test4 {
+  import scala.language.experimental.erasedDefinitions  // error
+  import scala.compiletime.erasedValue
+  type UnivEq[A]
+  object UnivEq:
+    erased def force[A]: UnivEq[A] = erasedValue  // error // error // error
+    extension [A](erased proof: UnivEq[A])        // error
+      inline def univEq(a: A, b: A): Boolean =
+        a == b
+}
+
+class Test5 {
+  import scala.language.experimental.genericNumberLiterals // error
+  val x: BigInt = 13232202002020202020202  // error
+  val y: BigInt = -0xaabb12345ACF12345AC   // error
+}
+
+class Test6 {
+  import scala.language.experimental
 }
 
+class Test7 {
+  import scala.language.experimental
+  import experimental.genericNumberLiterals // error: no aliases can be used to refer to a language import
+  val x: BigInt = 13232202002020202020202   // error
+}