review comments

[rust.git] / src / librustc / hir / mod.rs

diff --git a/src/librustc/hir/mod.rs b/src/librustc/hir/mod.rs
index 0edc41e6b4881390b8134d6244c73fc01ebbeea9..77713312ceca41dbb1e8329cf461b1b16215fd68 100644 (file)
--- a/src/librustc/hir/mod.rs
+++ b/src/librustc/hir/mod.rs
@@ -1075,6 +1075,13 @@ pub fn invert(self) -> Self {
             MutImmutable => MutMutable,
         }
     }
+
+    pub fn prefix_str(&self) -> &'static str {
+        match self {
+            MutMutable => "mut ",
+            MutImmutable => "",
+        }
+    }
 }
 
 #[derive(Copy, Clone, PartialEq, RustcEncodable, RustcDecodable, Debug, HashStable)]
@@ -2175,6 +2182,15 @@ pub enum Unsafety {
     Normal,
 }
 
+impl Unsafety {
+    pub fn prefix_str(&self) -> &'static str {
+        match self {
+            Unsafety::Unsafe => "unsafe ",
+            Unsafety::Normal => "",
+        }
+    }
+}
+
 #[derive(Copy, Clone, PartialEq, RustcEncodable, RustcDecodable, Debug, HashStable)]
 pub enum Constness {
     Const,