SI-8266 Deprecate octal escapes in f-interpolator

Also turns the f-interpolator into a migration
assistant by suggesting alternatives for the
standard escapes.

2 files changed, 19 insertions, 0 deletions

diff --git a/test/files/neg/t8266-invalid-interp.check b/test/files/neg/t8266-invalid-interp.check
new file mode 100644
index 0000000000..70dd4081b0
--- /dev/null
+++ b/test/files/neg/t8266-invalid-interp.check
@@ -0,0 +1,10 @@
+t8266-invalid-interp.scala:4: error: Trailing '\' escapes nothing.
+    f"a\",
+       ^
+t8266-invalid-interp.scala:5: error: invalid escape character at index 1 in "a\xc"
+    f"a\xc",
+       ^
+t8266-invalid-interp.scala:7: error: invalid escape character at index 1 in "a\vc"
+    f"a\vc"
+       ^
+three errors found
diff --git a/test/files/neg/t8266-invalid-interp.scala b/test/files/neg/t8266-invalid-interp.scala
new file mode 100644
index 0000000000..4b26546880
--- /dev/null
+++ b/test/files/neg/t8266-invalid-interp.scala
@@ -0,0 +1,9 @@
+
+trait X {
+  def f = Seq(
+    f"a\",
+    f"a\xc",
+    // following could suggest \u000b for vertical tab, similar for \a alert
+    f"a\vc"
+  )
+}