1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/parser/fn-body-optional-semantic-fail.rs b/tests/ui/parser/fn-body-optional-semantic-fail.rs
new file mode 100644
index 00000000000..12df488802e
--- /dev/null
+++ b/tests/ui/parser/fn-body-optional-semantic-fail.rs
@@ -0,0 +1,27 @@
+// Tests the different rules for `fn` forms requiring the presence or lack of a body.
+
+fn main() {
+    fn f1(); //~ ERROR free function without a body
+    fn f2() {} // OK.
+
+    trait X {
+        fn f1(); // OK.
+        fn f2() {} // OK.
+    }
+
+    struct Y;
+    impl X for Y {
+        fn f1(); //~ ERROR associated function in `impl` without body
+        fn f2() {} // OK.
+    }
+
+    impl Y {
+        fn f3(); //~ ERROR associated function in `impl` without body
+        fn f4() {} // OK.
+    }
+
+    extern "C" {
+        fn f5(); // OK.
+        fn f6() {} //~ ERROR incorrect function inside `extern` block
+    }
+}