Replace `extern mod` with `extern crate`

This patch adds a new keyword `crate` which is intended to replace mod
in the context of `extern mod` as part of the issue #9880. The patch
doesn't replace all `extern mod` cases since it is necessary to first
push a new snapshot 0.

The implementation could've been less invasive than this. However I
preferred to take this chance to split the `parse_item_foreign_mod`
method and pull the `extern crate` part out of there, hence the new
method `parse_item_foreign_crate`.

3 files changed, 42 insertions, 0 deletions

diff --git a/src/test/compile-fail/extern-expected-fn-or-brace.rs b/src/test/compile-fail/extern-expected-fn-or-brace.rs
new file mode 100644
index 00000000000..638253f816a
--- /dev/null
+++ b/src/test/compile-fail/extern-expected-fn-or-brace.rs
@@ -0,0 +1,14 @@
+// Copyright 2014 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.
+
+// Verifies that the expected token errors for `extern crate` are
+// raised
+
+extern "C" mod foo; //~ERROR expected `{` or `fn` but found `mod`
diff --git a/src/test/compile-fail/extern-foreign-crate.rs b/src/test/compile-fail/extern-foreign-crate.rs
new file mode 100644
index 00000000000..ffa6ffb042f
--- /dev/null
+++ b/src/test/compile-fail/extern-foreign-crate.rs
@@ -0,0 +1,14 @@
+// Copyright 2014 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.
+
+// Verifies that the expected token errors for `extern crate` are
+// raised
+
+extern crate foo {} //~ERROR expected one of `=`, `;` but found `{`
diff --git a/src/test/run-pass/extern-foreign-crate.rs b/src/test/run-pass/extern-foreign-crate.rs
new file mode 100644
index 00000000000..8949734b80e
--- /dev/null
+++ b/src/test/run-pass/extern-foreign-crate.rs
@@ -0,0 +1,14 @@
+// Copyright 2013 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.
+
+extern crate extra;
+extern mod mystd = "std";
+
+pub fn main() {}