SI-7848 Xlint no warn on $sym with params

This idea brought to you by retronym.

Also improve implicitNotFound detection at typer;
and avoid checking the standard interpolation
expression for cases like s"some $$x".

Some minor refactorings of implicitNotFound strings.

The intersobralator allows extra spaces, i.e., trims.

1 files changed, 25 insertions, 0 deletions

diff --git a/test/files/neg/t2462c.scala b/test/files/neg/t2462c.scala
new file mode 100644
index 0000000000..acf04afba9
--- /dev/null
+++ b/test/files/neg/t2462c.scala
@@ -0,0 +1,25 @@
+
+import annotation._
+
+@implicitNotFound("No C of ${ A }")
+class C[A]
+
+trait X$Y
+/* using the $$ separator for expanded names is unwise
+trait X$$Y
+trait X$$$Y
+trait X$$$$Y
+ */
+
+trait Foo[A]
+
+class Test {
+  def f[A: C] = ???
+  f[X$Y]
+/* using the $$ separator for expanded names is unwise
+  f[X$$Y]
+  f[X$$$Y]
+  f[X$$$$Y]
+ */
+  f[Foo[Int]]
+}