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-rw-r--r--src/libsyntax/ptr.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax/ptr.rs b/src/libsyntax/ptr.rs
index c3f8a977a65..58750158931 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 an empty `P<[T]>`.
     fn default() -> P<[T]> {
         P::new()
     }