element model support for @doNotStore

Change-Id: Ic69dcee22de76540d7034a0a9265cb22ea325b4e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/159184
Commit-Queue: Phil Quitslund <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: pq

pkg/analyzer/lib/dart/element/element.dart

@@ -528,6 +528,9 @@ abstract class Element implements AnalysisTarget {
   /// or `@Deprecated('..')`.
   bool get hasDeprecated;
 
+  /// Return `true` if this element has an annotation of the form `@doNotStore`.
+  bool get hasDoNotStore;
+
   /// Return `true` if this element has an annotation of the form `@factory`.
   bool get hasFactory;
 
@@ -702,6 +705,10 @@ abstract class ElementAnnotation implements ConstantEvaluationTarget {
   /// deprecated.
   bool get isDeprecated;
 
+  /// Return `true` if this annotation marks the associated element as not to be
+  /// stored.
+  bool get isDoNotStore;
+
   /// Return `true` if this annotation marks the associated member as a factory.
   bool get isFactory;
 

pkg/analyzer/lib/src/dart/element/element.dart

@@ -2284,6 +2284,10 @@ class ElementAnnotationImpl implements ElementAnnotation {
   /// deprecated.
   static const String _DEPRECATED_VARIABLE_NAME = "deprecated";
 
+  /// The name of the top-level variable used to mark an element as not to be
+  /// stored.
+  static const String _DO_NOT_STORE_VARIABLE_NAME = "doNotStore";
+
   /// The name of the top-level variable used to mark a method as being a
   /// factory.
   static const String _FACTORY_VARIABLE_NAME = "factory";
@@ -2411,6 +2415,12 @@ class ElementAnnotationImpl implements ElementAnnotation {
     return false;
   }
 
+  @override
+  bool get isDoNotStore =>
+      element is PropertyAccessorElement &&
+      element.name == _DO_NOT_STORE_VARIABLE_NAME &&
+      element.library?.name == _META_LIB_NAME;
+
   @override
   bool get isFactory =>
       element is PropertyAccessorElement &&
@@ -2674,6 +2684,18 @@ abstract class ElementImpl implements Element {
     return false;
   }
 
+  @override
+  bool get hasDoNotStore {
+    var metadata = this.metadata;
+    for (var i = 0; i < metadata.length; i++) {
+      var annotation = metadata[i];
+      if (annotation.isDoNotStore) {
+        return true;
+      }
+    }
+    return false;
+  }
+
   @override
   bool get hasFactory {
     var metadata = this.metadata;
@@ -5957,6 +5979,9 @@ class MultiplyDefinedElementImpl implements MultiplyDefinedElement {
   @override
   bool get hasDeprecated => false;
 
+  @override
+  bool get hasDoNotStore => false;
+
   @override
   bool get hasFactory => false;
 

pkg/analyzer/lib/src/dart/element/member.dart

@@ -450,6 +450,9 @@ abstract class Member implements Element {
   @override
   bool get hasDeprecated => _declaration.hasDeprecated;
 
+  @override
+  bool get hasDoNotStore => _declaration.hasDoNotStore;
+
   @override
   bool get hasFactory => _declaration.hasFactory;