syntax: struct field attributes and cfg

src/test/compile-fail/struct-field-attr-feature-gate.rs

@@ -0,0 +1,20 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+struct Foo {
+    present: (),
+}
+
+fn main() {
+    let foo = Foo { #[cfg(all())] present: () };
+    //~^ ERROR attributes on struct pattern or literal fields are unstable
+    let Foo { #[cfg(all())] present: () } = foo;
+    //~^ ERROR attributes on struct pattern or literal fields are unstable
+}

src/test/compile-fail/struct-field-cfg.rs

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+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(struct_field_attributes)]
+
+struct Foo {
+    present: (),
+}
+
+fn main() {
+    let foo = Foo { #[cfg(all())] present: () };
+    let _ = Foo { #[cfg(any())] present: () };
+    //~^ ERROR missing field `present` in initializer of `Foo`
+    let _ = Foo { present: (), #[cfg(any())] absent: () };
+    let _ = Foo { present: (), #[cfg(all())] absent: () };
+    //~^ ERROR struct `Foo` has no field named `absent`
+    let Foo { #[cfg(all())] present: () } = foo;
+    let Foo { #[cfg(any())] present: () } = foo;
+    //~^ ERROR pattern does not mention field `present`
+    let Foo { present: (), #[cfg(any())] absent: () } = foo;
+    let Foo { present: (), #[cfg(all())] absent: () } = foo;
+    //~^ ERROR struct `Foo` does not have a field named `absent`
+}