1 files changed, 27 insertions, 0 deletions
diff --git a/third_party/rust/cubeb-sys/src/macros.rs b/third_party/rust/cubeb-sys/src/macros.rs
new file mode 100644
index 0000000000..02f1b7a8af
--- /dev/null
+++ b/third_party/rust/cubeb-sys/src/macros.rs
@@ -0,0 +1,27 @@
+// Copyright © 2017-2018 Mozilla Foundation
+//
+// This program is made available under an ISC-style license.  See the
+// accompanying file LICENSE for details.
+
+macro_rules! cubeb_enum {
+    (pub enum $name:ident { $($variants:tt)* }) => {
+        #[cfg(target_env = "msvc")]
+        pub type $name = i32;
+        #[cfg(not(target_env = "msvc"))]
+        pub type $name = u32;
+        cubeb_enum!(gen, $name, 0, $($variants)*);
+    };
+    (pub enum $name:ident: $t:ty { $($variants:tt)* }) => {
+        pub type $name = $t;
+        cubeb_enum!(gen, $name, 0, $($variants)*);
+    };
+    (gen, $name:ident, $val:expr, $variant:ident, $($rest:tt)*) => {
+        pub const $variant: $name = $val;
+        cubeb_enum!(gen, $name, $val+1, $($rest)*);
+    };
+    (gen, $name:ident, $val:expr, $variant:ident = $e:expr, $($rest:tt)*) => {
+        pub const $variant: $name = $e;
+        cubeb_enum!(gen, $name, $e+1, $($rest)*);
+    };
+    (gen, $name:ident, $val:expr, ) => {}
+}