SI-6549 Improve escaping in REPL codegen.

 - Escape the LHS of an assign when printing results
   - e.g. X("").foo = bar
 - Escape val names
   - e.g. val `"` = 0`

1 files changed, 22 insertions, 0 deletions

diff --git a/test/files/run/t6549.scala b/test/files/run/t6549.scala
new file mode 100644
index 0000000000..7335661dc7
--- /dev/null
+++ b/test/files/run/t6549.scala
@@ -0,0 +1,22 @@
+import scala.tools.partest.ReplTest
+
+// Check that the fragments of code generated in
+// in the REPL correctly escape values added to
+// literal strings.
+//
+// Before, we saw:
+// scala> m("").x = 77
+// <console>:10: error: ')' expected but string literal found.
+//  + "m("").x: Int = " + `$ires8` + "\n"
+object Test extends ReplTest {
+  def code = """
+    |case class `X"`(var xxx: Any)
+    |val m = Map(("": Any) -> `X"`("\""), ('s: Any) -> `X"`("\""))
+    |m("")
+    |m("").xxx
+    |m("").xxx = 0
+    |m("").xxx = "\""
+    |m('s).xxx = 's
+    |val `"` = 0
+  """.stripMargin
+}