Annotation for `@optionalTypeArgs` (linter#196).

pkg/meta/lib/meta.dart

Index: pkg/meta/lib/meta.dart
diff --git a/pkg/meta/lib/meta.dart b/pkg/meta/lib/meta.dart
index 16411b5def992b9c278a7e8a2e3ed2de5a38ab50..d089aa48faea9f2816c2b68936be8665971fbff3 100644
--- a/pkg/meta/lib/meta.dart
+++ b/pkg/meta/lib/meta.dart
@@ -56,6 +56,12 @@ const _Literal literal = const _Literal();
 ///   without invoking the overridden method.
 const _MustCallSuper mustCallSuper = const _MustCallSuper();
 
+/// Used to annotate a class declaration `c`. Indicates that any type arguments

[Brian Wilkerson, 2016/04/11 23:51:24]

nit: class names are typically capitalized

[pquitslund, 2016/04/11 23:58:21]

Fixed!

+/// declared on `c` are to be treated as optional.  Tools such as the analyzer
+/// and linter can use this information to suppress warnings that would
+/// otherwise require type arguments to be provided for instances of `c`.
+const _OptionalTypeArgs optionalTypeArgs = const _OptionalTypeArgs();
+
 /// Used to annotate an instance member (method, getter, setter, operator, or
 /// field) `m` in a class `C`. If the annotation is on a field it applies to the
 /// getter, and setter if appropriate, that are induced by the field. Indicates
@@ -117,6 +123,10 @@ class _MustCallSuper {
   const _MustCallSuper();
 }
 
+class _OptionalTypeArgs {
+  const _OptionalTypeArgs();
+}
+
 class _Protected {
   const _Protected();
 }