[breaking-change] don't glob export ast::BlockCheckMode variants

src/libsyntax/ast.rs

@@ -10,7 +10,6 @@
 
 // The Rust abstract syntax tree.
 
-pub use self::BlockCheckMode::*;
 pub use self::CaptureClause::*;
 pub use self::Decl_::*;
 pub use self::ExplicitSelf_::*;
@@ -870,8 +869,8 @@ pub type SpannedIdent = Spanned<Ident>;
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
 pub enum BlockCheckMode {
-    DefaultBlock,
-    UnsafeBlock(UnsafeSource),
+    Default,
+    Unsafe(UnsafeSource),
 }
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]