SI-7788 Avoid accidental shadowing of Predef.conforms

Rename `conforms` to `$conforms` and put in a minimal backstop: pos/t7788.scala

TODO: predicate the backwards compatibility shim for `Predef_conforms`
on `-Xsource:2.10`

1 files changed, 8 insertions, 0 deletions

diff --git a/test/files/pos/t7788.scala b/test/files/pos/t7788.scala
new file mode 100644
index 0000000000..81eada962b
--- /dev/null
+++ b/test/files/pos/t7788.scala
@@ -0,0 +1,8 @@
+class Test {
+  // Predef used to define a method `conforms` to produce the implicit evidence below
+  // all this does is ensure we don't rename Predef.$conforms back to conforms when $ goes out of fashion
+  // or that there is some other way of generating the implicit value that witnesses T => U for T <: U
+  def conforms(x: Int, y: Int) = x < y
+  def foo[A](implicit ev: Int => A) = ???
+  foo[Int]
+}
\ No newline at end of file