SI-5905 Sanity check -language options

The option names are hardcoded, but checked by a test.

There are no hooks to verify options after the compiler
is constructed.

Introduced a `MultiChoiceSetting` required for the
setting creation framework.

1 files changed, 15 insertions, 0 deletions

diff --git a/test/files/run/t5905b-features.scala b/test/files/run/t5905b-features.scala
new file mode 100644
index 0000000000..627df8334b
--- /dev/null
+++ b/test/files/run/t5905b-features.scala
@@ -0,0 +1,15 @@
+
+import tools.partest.DirectTest
+
+// verify that only languageFeature names are accepted by -language
+object Test extends DirectTest {
+  override def code = "class Code"
+
+  override def extraSettings = s"-usejavacp -d ${testOutput.path}"
+
+  override def show() = {
+    //compile("-language", "--")  // no error
+    compile(s"-language:noob")
+  }
+}
+