Added run-pass and compile-fail tests.

Author: Alexander Regueiro

src/test/compile-fail/hygiene-optout-1.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 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(decl_macro)]
+
+macro m($mod_name:ident) {
+    pub mod $mod_name {
+        pub const BAR: u32 = 123;
+    }
+}
+
+fn main() {
+    m!(foo);
+    let _ = foo::BAR;
+    //~^ ERROR cannot find value `BAR` in module `foo`
+}

src/test/compile-fail/hygiene-optout-2.rs

@@ -0,0 +1,23 @@
+// Copyright 2018 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(decl_macro)]
+
+macro m() {
+    pub mod #foo {
+        pub const BAR: u32 = 123;
+    }
+}
+
+fn main() {
+    m!();
+    let _ = foo::BAR;
+    //~^ ERROR cannot find value `BAR` in module `foo`
+}

src/test/compile-fail/hygiene-optout-3.rs

@@ -0,0 +1,26 @@
+// Copyright 2018 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(decl_macro)]
+
+macro m_helper() {
+    struct #S;
+}
+
+macro m() {
+    m_helper!();
+    let s = S;
+}
+
+fn main() {
+    m!();
+    let s = S;
+    //~^ ERROR cannot find value `S` in this scope
+}

src/test/run-pass/hygiene-optout-1.rs

@@ -0,0 +1,22 @@
+// Copyright 2018 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(decl_macro)]
+
+macro m($mod_name:ident) {
+    pub mod #$mod_name {
+        pub const #BAR: u32 = 123;
+    }
+}
+
+fn main() {
+    m!(foo);
+    assert_eq!(123, foo::BAR);
+}

src/test/run-pass/hygiene-optout-2.rs

@@ -0,0 +1,22 @@
+// Copyright 2018 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(decl_macro)]
+
+macro m() {
+    pub mod #foo {
+        pub const #BAR: u32 = 123;
+    }
+}
+
+fn main() {
+    m!();
+    assert_eq!(123, foo::BAR);
+}

src/test/run-pass/hygiene-optout-lifetimes.rs

@@ -0,0 +1,22 @@
+// Copyright 2018 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(decl_macro)]
+
+use std::marker::PhantomData;
+
+macro m($lifetime:tt) {
+    pub struct #Foo<$lifetime>(PhantomData<&#'a ()>);
+}
+
+fn main() {
+    m!('a);
+    let _ = Foo(Default::default());
+}