[Syntax Breaking] Rename DefaultImpl to AutoImpl

DefaultImpl is a highly confusing name for what we now call auto impls,
as in `impl Send for ..`. The name auto impl is not formally decided
but for sanity anything is better than `DefaultImpl` which refers
neither to `default impl` nor to `impl Default`.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 30451ec757a..83f5553a792 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -1357,10 +1357,10 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                 }
             }
 
-            ast::ItemKind::DefaultImpl(..) => {
+            ast::ItemKind::AutoImpl(..) => {
                 gate_feature_post!(&self, optin_builtin_traits,
                                    i.span,
-                                   "default trait implementations are experimental \
+                                   "auto trait implementations are experimental \
                                     and possibly buggy");
             }