2 files changed, 2 insertions, 0 deletions
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 105f911dd57..40c8ba93bd5 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -362,6 +362,7 @@ impl Generics {
 }
 
 impl Default for Generics {
+    /// Creates an instance of `Generics`.
     fn default() ->  Generics {
         Generics {
             lifetimes: Vec::new(),
diff --git a/src/libsyntax/ptr.rs b/src/libsyntax/ptr.rs
index c3f8a977a65..a65c54ac1e2 100644
--- a/src/libsyntax/ptr.rs
+++ b/src/libsyntax/ptr.rs
@@ -154,6 +154,7 @@ impl<T> P<[T]> {
 }
 
 impl<T> Default for P<[T]> {
+    /// Creates a new `P`, with the `Default` value for T.
     fn default() -> P<[T]> {
         P::new()
     }