Move MacroKind into libsyntax_pos

So it can be eventually used in `ExpnInfo`

Author: petrochenkov

src/libsyntax/ext/base.rs

@@ -24,6 +24,7 @@ use std::path::PathBuf;
 use std::rc::Rc;
 use std::default::Default;
 
+pub use syntax_pos::hygiene::MacroKind;
 
 #[derive(Debug,Clone)]
 pub enum Annotatable {
@@ -518,34 +519,6 @@ impl MacResult for DummyResult {
     }
 }
 
-/// Represents different kinds of macro invocations that can be resolved.
-#[derive(Clone, Copy, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
-pub enum MacroKind {
-    /// A bang macro - foo!()
-    Bang,
-    /// An attribute macro - #[foo]
-    Attr,
-    /// A derive attribute macro - #[derive(Foo)]
-    Derive,
-}
-
-impl MacroKind {
-    pub fn descr(self) -> &'static str {
-        match self {
-            MacroKind::Bang => "macro",
-            MacroKind::Attr => "attribute macro",
-            MacroKind::Derive => "derive macro",
-        }
-    }
-
-    pub fn article(self) -> &'static str {
-        match self {
-            MacroKind::Attr => "an",
-            _ => "a",
-        }
-    }
-}
-
 /// A syntax extension kind.
 pub enum SyntaxExtensionKind {
     /// A token-based function-like macro.

src/libsyntax_pos/hygiene.rs

@@ -723,6 +723,34 @@ impl ExpnFormat {
     }
 }
 
+/// The kind of macro invocation or definition.
+#[derive(Clone, Copy, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
+pub enum MacroKind {
+    /// A bang macro `foo!()`.
+    Bang,
+    /// An attribute macro `#[foo]`.
+    Attr,
+    /// A derive macro `#[derive(Foo)]`
+    Derive,
+}
+
+impl MacroKind {
+    pub fn descr(self) -> &'static str {
+        match self {
+            MacroKind::Bang => "macro",
+            MacroKind::Attr => "attribute macro",
+            MacroKind::Derive => "derive macro",
+        }
+    }
+
+    pub fn article(self) -> &'static str {
+        match self {
+            MacroKind::Attr => "an",
+            _ => "a",
+        }
+    }
+}
+
 /// The kind of compiler desugaring.
 #[derive(Clone, Copy, Hash, Debug, PartialEq, Eq, RustcEncodable, RustcDecodable)]
 pub enum CompilerDesugaringKind {