Add support for metadata on enum cases. (flutter#690)

Fix flutter#688.

Author: munificent

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.0.14
+
+* Support metadata on enum cases (#688).
+
 # 1.0.13
 
 * Support the latest release of `package:analyzer`.

bin/format.dart

@@ -14,7 +14,7 @@ import 'package:dart_style/src/io.dart';
 import 'package:dart_style/src/source_code.dart';
 
 // Note: The following line of code is modified by tool/grind.dart.
-const version = "1.0.13";
+const version = "1.0.14";
 
 void main(List<String> args) {
   var parser = new ArgParser(allowTrailingOptions: true);

lib/src/source_visitor.dart

@@ -886,6 +886,7 @@ class SourceVisitor extends ThrowingAstVisitor {
   }
 
   visitEnumConstantDeclaration(EnumConstantDeclaration node) {
+    visitMetadata(node.metadata);
     visit(node.name);
   }
 

pubspec.lock

@@ -366,4 +366,4 @@ packages:
     source: hosted
     version: "2.1.13"
 sdks:
-  dart: ">=2.0.0-dev.54.0 <=2.0.0-dev.55.0"
+  dart: ">=2.0.0-dev.54.0 <=2.0.0-edge.ba342a94ecd08c183b6ea0b4dab33e47bb8dadd5"

pubspec.yaml

@@ -1,6 +1,6 @@
 name: dart_style
 # Note: See tool/grind.dart for how to bump the version.
-version: 1.0.13
+version: 1.0.14
 author: Dart Team <[email protected]>
 description: Opinionated, automatic Dart source code formatter.
 homepage: https://github.com/dart-lang/dart_style

test/whitespace/metadata.unit

@@ -291,4 +291,26 @@ main() {
           expression) {
     ;
   }
+}
+>>> metadata on enum cases
+enum Foo { a, @meta b, @meta1 @meta2 c}
+<<<
+enum Foo {
+  a,
+  @meta
+  b,
+  @meta1
+  @meta2
+  c
+}
+>>> preserve blank line before enum case with metadata
+enum Foo { a,
+
+@meta b}
+<<<
+enum Foo {
+  a,
+
+  @meta
+  b
 }