Add test for try operator with Option

Author: usbalbin

src/test/ui/consts/try-operator.rs

@@ -6,11 +6,18 @@
 #![feature(const_identity_convert)]
 
 fn main() {
-    const fn foo() -> Result<bool, ()> {
+    const fn result() -> Result<bool, ()> {
         Err(())?;
         Ok(true)
     }
 
-    const FOO: Result<bool, ()> = foo();
+    const FOO: Result<bool, ()> = result();
     assert_eq!(Err(()), FOO);
+
+    const fn option() -> Option<()> {
+        None?;
+        Some(())
+    }
+    const BAR: Option<()> = option();
+    assert_eq!(None, BAR);
 }