Remove code for computing summaries based on the Fasta parser.

pkg/analyzer/lib/src/summary/fasta/stack_listener.dart

Index: pkg/analyzer/lib/src/summary/fasta/stack_listener.dart
diff --git a/pkg/analyzer/lib/src/summary/fasta/stack_listener.dart b/pkg/analyzer/lib/src/summary/fasta/stack_listener.dart
deleted file mode 100644
index d8b29ea7d4148d9a4b933890f3eabd8fb577fde1..0000000000000000000000000000000000000000
--- a/pkg/analyzer/lib/src/summary/fasta/stack_listener.dart
+++ /dev/null
@@ -1,140 +0,0 @@
-// Copyright (c) 2016, 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 fe.stack_listener;
-
-import 'dart:collection' show Queue;
-
-import 'package:front_end/src/fasta/parser.dart'
-    show IdentifierContext, Listener, MemberKind;
-
-import 'package:front_end/src/fasta/scanner.dart' show Token;
-
-import 'package:front_end/src/scanner/token.dart' show BeginToken;
-
-enum NullValue {
-  Arguments,
-  Combinators,
-  FormalParameters,
-  FunctionBody,
-  IdentifierList,
-  Initializers,
-  Metadata,
-  Modifiers,
-  Type,
-  TypeArguments,
-  TypeList,
-  TypeVariable,
-  TypeVariables,
-}
-
-abstract class StackListener extends Listener {
-  final Queue<Object> stack = new Queue<Object>();
-
-  Uri get uri;
-
-  void checkEmpty() {
-    if (stack.isNotEmpty) {
-      throw "Stack not empty $uri:\n"
-          "  ${stack.join('\n  ')}";
-    }
-  }
-
-  void debugEvent(String name) {
-    // print("  ${stack.join('\n  ')}");
-    // print(name);
-  }
-
-  void endCompilationUnit(int count, Token token) {
-    debugEvent("CompilationUnit");
-    checkEmpty();
-  }
-
-  void endTopLevelDeclaration(Token token) {
-    debugEvent("TopLevelDeclaration");
-    checkEmpty();
-  }
-
-  void handleIdentifier(Token token, IdentifierContext context) {
-    debugEvent("handleIdentifier");
-    push(token.lexeme);
-  }
-
-  void handleNoArguments(Token token) {
-    debugEvent("NoArguments");
-    var typeArguments = pop();
-    assert(typeArguments == null);
-    push(NullValue.Arguments);
-  }
-
-  void handleNoFormalParameters(Token token, MemberKind kind) {
-    debugEvent("NoFormalParameters");
-    push(NullValue.FormalParameters);
-  }
-
-  void handleNoFunctionBody(Token token) {
-    debugEvent("NoFunctionBody");
-    push(NullValue.FunctionBody);
-  }
-
-  void handleNoInitializers() {
-    debugEvent("NoInitializers");
-    push(NullValue.Initializers);
-  }
-
-  void handleNoType(Token token) {
-    debugEvent("NoType");
-    push(NullValue.Type);
-  }
-
-  void handleNoTypeArguments(Token token) {
-    debugEvent("NoTypeArguments");
-    push(NullValue.TypeArguments);
-  }
-
-  void handleNoTypeVariables(Token token) {
-    debugEvent("NoTypeVariables");
-    push(NullValue.TypeVariables);
-  }
-
-  void handleParenthesizedExpression(BeginToken token) {
-    debugEvent("ParenthesizedExpression");
-  }
-
-  void logEvent(String name) {
-    print("  ${stack.join('\n  ')}");
-    throw "Unhandled event: $name in $runtimeType $uri.";
-  }
-
-  Object peek() {
-    Object node = stack.last;
-    return node is NullValue ? null : node;
-  }
-
-  Object pop({NullValue expect: null}) {
-    Object node = stack.removeLast();
-    if (expect != null && expect != node) {
-      throw "unexpected value: $expect vs $node";
-    }
-    return node is NullValue ? null : node;
-  }
-
-  Object popIfNotNull(Object value) {
-    return value == null ? null : pop();
-  }
-
-  List popList(int n) {
-    if (n == 0) return null;
-    List list = new List(n);
-    for (int i = n - 1; i >= 0; i--) {
-      list[i] = pop();
-    }
-    return list;
-  }
-
-  void push(Object node) {
-    if (node == null) throw "null not allowed.";
-    stack.addLast(node);
-  }
-}