Issue 43890. Implement applying resolution to IndexExpression.

Bug: dart-lang/sdk#43890
Change-Id: I537d157ca9ff583b09e7c09ff580202b9dc4ced3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168778
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

Author: scheglov

pkg/analyzer/lib/src/summary2/apply_resolution.dart

@@ -396,6 +396,14 @@ class ApplyResolutionVisitor extends ThrowingAstVisitor<void> {
     _namespaceDirective(node);
   }
 
+  @override
+  void visitIndexExpression(IndexExpression node) {
+    node.target?.accept(this);
+    node.index.accept(this);
+    node.staticElement = _nextElement();
+    _expression(node);
+  }
+
   @override
   void visitInstanceCreationExpression(InstanceCreationExpression node) {
     node.constructorName.accept(this);

pkg/analyzer/lib/src/summary2/ast_binary_writer.dart

@@ -915,11 +915,11 @@ class AstBinaryWriter extends ThrowingAstVisitor<LinkedNodeBuilder> {
   @override
   LinkedNodeBuilder visitIndexExpression(IndexExpression node) {
     var builder = LinkedNodeBuilder.indexExpression(
-      indexExpression_index: node.index.accept(this),
       indexExpression_target: node.target?.accept(this),
-      expression_type: _writeType('staticType', node.staticType),
+      indexExpression_index: node.index.accept(this),
     );
     _componentsOfElement(node.staticElement);
+    _storeExpression(builder, node);
     builder.flags = AstBinaryFlags.encode(
       hasPeriod: node.period != null,
       hasQuestion: node.question != null,

pkg/analyzer/test/src/summary/resynthesize_common.dart

@@ -2830,6 +2830,47 @@ const List<P<dynamic>> values = /*typeArgs=P<dynamic>*/[/*typeArgs=dynamic*/
         withTypes: true);
   }
 
+  test_const_invalid_cascade_indexExpression() async {
+    var library = await checkLibrary(r'''
+class A {
+  int operator[](int _) => 0;
+}
+const b = A()..[0];
+''');
+
+    checkElementText(
+        library,
+        r'''
+class A {
+  int [](int _) {}
+}
+const A b;
+  constantInitializer
+    CascadeExpression
+      cascadeSections
+        IndexExpression
+          index: IntegerLiteral
+            literal: 0
+            staticType: int
+          period: ..
+          staticElement: self::@class::A::@method::[]
+          staticType: int
+      staticType: A
+      target: InstanceCreationExpression
+        argumentList: ArgumentList
+        constructorName: ConstructorName
+          staticElement: self::@class::A::@constructor::•
+          type: TypeName
+            name: SimpleIdentifier
+              staticElement: self::@class::A
+              staticType: null
+              token: A
+            type: A
+        staticType: A
+''',
+        withFullyResolvedAst: true);
+  }
+
   test_const_invalid_field_const() async {
     var library = await checkLibrary(r'''
 class C {
@@ -2861,6 +2902,41 @@ int foo() {}
 ''');
   }
 
+  test_const_invalid_indexExpression() async {
+    var library = await checkLibrary(r'''
+const a = [0];
+const b = a[0];
+''');
+
+    checkElementText(
+        library,
+        r'''
+const List<int> a;
+  constantInitializer
+    ListLiteral
+      elements
+        IntegerLiteral
+          literal: 0
+          staticType: int
+      staticType: List<int>
+const int b;
+  constantInitializer
+    IndexExpression
+      index: IntegerLiteral
+        literal: 0
+        staticType: int
+      staticElement: MethodMember
+        base: dart:core::@class::List::@method::[]
+        substitution: {E: int}
+      staticType: int
+      target: SimpleIdentifier
+        staticElement: self::@getter::a
+        staticType: List<int>
+        token: a
+''',
+        withFullyResolvedAst: true);
+  }
+
   test_const_invalid_intLiteral() async {
     var library = await checkLibrary(r'''
 const int x = 0x;