libproc_macro: Add Spacing type interface.

Add spacing type rust interface to the rust part of the libproc_macro.

ChangeLog:

	* librust/proc_macro/rust/lib.rs: Add Spacing type.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/librust/proc_macro/rust/lib.rs b/librust/proc_macro/rust/lib.rs
index 78a302f..cd53d39 100644
--- a/librust/proc_macro/rust/lib.rs
+++ b/librust/proc_macro/rust/lib.rs
@@ -268,3 +268,9 @@ impl FromStr for Literal {
         todo!("Implement this function")
     }
 }
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub enum Spacing {
+    Alone,
+    Joint,
+}