1 files changed, 92 insertions, 0 deletions
diff --git a/tests/ui/cfg/cfg_stmt_expr.rs b/tests/ui/cfg/cfg_stmt_expr.rs
new file mode 100644
index 000000000..6381bb2d5
--- /dev/null
+++ b/tests/ui/cfg/cfg_stmt_expr.rs
@@ -0,0 +1,92 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_mut)]
+#![allow(unused_variables)]
+#![deny(non_snake_case)]
+#![feature(stmt_expr_attributes)]
+
+fn main() {
+    let a = 413;
+    #[cfg(unset)]
+    let a = ();
+    assert_eq!(a, 413);
+
+    let mut b = 612;
+    #[cfg(unset)]
+    {
+        b = 1111;
+    }
+    assert_eq!(b, 612);
+
+    #[cfg(unset)]
+    undefined_fn();
+
+    #[cfg(unset)]
+    undefined_macro!();
+    #[cfg(unset)]
+    undefined_macro![];
+    #[cfg(unset)]
+    undefined_macro!{};
+
+    // pretty printer bug...
+    // #[cfg(unset)]
+    // undefined_macro!{}
+
+    let () = (#[cfg(unset)] 341,); // Should this also work on parens?
+    let t = (1, #[cfg(unset)] 3, 4);
+    assert_eq!(t, (1, 4));
+
+    let f = |_: u32, _: u32| ();
+    f(2, 1, #[cfg(unset)] 6);
+
+    let _: u32 = a.clone(#[cfg(unset)] undefined);
+
+    let _: [(); 0] = [#[cfg(unset)] 126];
+    let t = [#[cfg(unset)] 1, 2, 6];
+    assert_eq!(t, [2, 6]);
+
+    {
+        let r;
+        #[cfg(unset)]
+        (r = 5);
+        #[cfg(not(unset))]
+        (r = 10);
+        assert_eq!(r, 10);
+    }
+
+    // check that macro expanded code works
+
+    macro_rules! if_cfg {
+        ($cfg:meta? $ib:block else $eb:block) => {
+            {
+                let r;
+                #[cfg($cfg)]
+                (r = $ib);
+                #[cfg(not($cfg))]
+                (r = $eb);
+                r
+            }
+        }
+    }
+
+    let n = if_cfg!(unset? {
+        413
+    } else {
+        612
+    });
+
+    assert_eq!((#[cfg(unset)] 1, #[cfg(not(unset))] 2), (2,));
+    assert_eq!(n, 612);
+
+    // check that lints work
+
+    #[allow(non_snake_case)]
+    let FOOBAR = {
+        fn SYLADEX() {}
+    };
+
+    #[allow(non_snake_case)]
+    {
+        fn CRUXTRUDER() {}
+    }
+}