Build elements for FieldFormalParameter(s) even for local functions.

pkg/analyzer/test/dart/element/builder_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.test.dart.element.builder_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_ast_factory.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/ast/ast.dart';
 import 'package:analyzer/src/dart/element/builder.dart';
 import 'package:analyzer/src/dart/element/element.dart';
+import 'package:analyzer/src/dart/error/syntactic_errors.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/testing/ast_test_factory.dart';
 import 'package:analyzer/src/generated/testing/element_factory.dart';
 import 'package:analyzer/src/generated/testing/token_factory.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
@@ skipping 1108 matching lines @@
     FunctionBody mainBody = mainAst.functionExpression.body;
     mainBody.accept(new LocalElementBuilder(holder, compilationUnitElement));
     main.functions = holder.functions;
     main.localVariables = holder.localVariables;
     expect(main.functions, hasLength(1));
     FunctionElement f = main.functions[0];
     expect(f.parameters, hasLength(1));
     expect(f.parameters[0].initializer, isNotNull);
   }
 
+  void test_visitFieldFormalParameter() {
+    CompilationUnit unit = parseCompilationUnit(
+        r'''
+main() {
+  f(a, this.b) {}
+}
+''',
+        [ParserErrorCode.FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR]);
+    var main = unit.declarations[0] as FunctionDeclaration;
+    var mainBody = main.functionExpression.body as BlockFunctionBody;
+    var mainBlock = mainBody.block;
+    var statement = mainBlock.statements[0] as FunctionDeclarationStatement;
+    FunctionDeclaration f = statement.functionDeclaration;
+
+    // Build API elements.
+    {
+      ElementHolder holder = new ElementHolder();
+      unit.accept(new ApiElementBuilder(holder, compilationUnitElement));
+    }
+
+    // Build local elements.
+    ElementHolder holder = new ElementHolder();
+    var builder = new LocalElementBuilder(holder, compilationUnitElement);
+    f.accept(builder);
+
+    List<FormalParameter> parameters =
+        f.functionExpression.parameters.parameters;
+
+    ParameterElement a = parameters[0].element;
+    expect(a, isNotNull);
+    expect(a.name, 'a');
+
+    ParameterElement b = parameters[1].element;
+    expect(b, isNotNull);
+    expect(b.name, 'b');
+  }
+
   void test_visitVariableDeclaration_local() {
     var holder = buildElementsForText('class C { m() { T v = null; } }');
     List<LocalVariableElement> variableElements = holder.localVariables;
     expect(variableElements, hasLength(1));
     LocalVariableElement variableElement = variableElements[0];
     expect(variableElement.hasImplicitType, isFalse);
     expect(variableElement.name, 'v');
     expect(variableElement.initializer, isNotNull);
     _assertVisibleRange(variableElement, 14, 29);
   }
@@ skipping 1468 matching lines @@
     AnalysisEngine.instance.logger = logger;
     try {
       _compilationUnit = parseCompilationUnit(code);
       compilationUnit.accept(visitor);
     } finally {
       expect(logger.log, hasLength(0));
       AnalysisEngine.instance.logger = Logger.NULL;
     }
   }
 }