Remove pkg/front_end's remaining dependencies on pkg/analyzer.

pkg/front_end/lib/src/libraries_reader.dart

Index: pkg/front_end/lib/src/libraries_reader.dart
diff --git a/pkg/front_end/lib/src/libraries_reader.dart b/pkg/front_end/lib/src/libraries_reader.dart
deleted file mode 100644
index ded5d9feee7795a893229d44c6ff5c468a331153..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/libraries_reader.dart
+++ /dev/null
@@ -1,201 +0,0 @@
-import 'package:analyzer/src/summary/idl.dart';
-import 'package:front_end/src/base/library_info.dart';
-
-/// Decodes the contents of the SDK's "libraries.dart" file.
-///
-/// Caller should pass in the unlinked summary of the libraries.dart file.  This
-/// function will materialize the "libraries" constant based on information in
-/// the summary.
-///
-/// Note that this code is not intended to be fully general; it makes some
-/// assumptions about the structure of the "libraries.dart" file (such as what
-/// declarations are expected to be present in it, and the types of those
-/// declarations).
-Map<String, LibraryInfo> readLibraries(UnlinkedUnit librariesUnit) {
-  var constContext = new _ConstContext(librariesUnit.references);
-  for (var variable in librariesUnit.variables) {
-    if (!variable.isConst) continue;
-    constContext.topLevelConstants[variable.name] =
-        new _ConstVariable(variable.initializer.bodyExpr, constContext);
-  }
-  for (var cls in librariesUnit.classes) {
-    if (cls.name == 'Maturity') {
-      for (var field in cls.fields) {
-        if (!field.isConst) continue;
-        constContext.maturityConstants[field.name] =
-            new _ConstVariable(field.initializer.bodyExpr, constContext);
-      }
-    }
-  }
-  return constContext.topLevelConstants['libraries'].value;
-}
-
-/// Function type used to invoke a constructor based on dynamic information.
-///
-/// Caller supplies two callbacks ([positional] and [named]) which can be used
-/// to query the arguments passed to the constructor.  These callbacks will
-/// return the requested argument if it was provided; otherwise they will return
-/// the supplied default value.
-typedef dynamic _Constructor(dynamic positional(int i, [dynamic defaultValue]),
-    dynamic named(String name, [dynamic defaultValue]));
-
-/// Contextual information used to evaluate constants in the "libraries.dart"
-/// file.
-class _ConstContext {
-  /// Top level constants in the "libraries.dart" file.
-  final topLevelConstants = <String, _ConstVariable>{};
-
-  /// Static constants in "libraries.dart"'s "Maturity" class.
-  final maturityConstants = <String, _ConstVariable>{};
-
-  /// References from the unlinked summary of the "libraries.dart" file.
-  final List<UnlinkedReference> references;
-
-  _ConstContext(this.references);
-}
-
-/// Information necessary to evaluate a single constant from the
-/// "libraries.dart" file.
-class _ConstVariable {
-  /// The constant expression from the unlinked summary.
-  final UnlinkedExpr expr;
-
-  /// Contextual information necessary to evaluate the constant.
-  final _ConstContext context;
-
-  /// The evaluated value, or `null` if it hasn't been evaluated yet.
-  dynamic _value;
-
-  _ConstVariable(this.expr, this.context);
-
-  /// Evaluate the constant (if necessary) and return it.
-  dynamic get value => _value ??= _materialize();
-
-  /// Find the constructor referred to by [entityRef] and return a function
-  /// which may be used to invoke it.
-  _Constructor _findConstructor(EntityRef entityRef) {
-    // This method is not fully general; we only support the constructor
-    // invocations that we expect to find in LibraryInfo.
-    assert(entityRef.implicitFunctionTypeIndices.isEmpty);
-    assert(entityRef.paramReference == 0);
-    assert(entityRef.syntheticParams.isEmpty);
-    assert(entityRef.syntheticReturnType == null);
-    assert(entityRef.typeArguments.isEmpty);
-    var reference = context.references[entityRef.reference];
-    assert(reference.prefixReference == 0);
-    switch (reference.name) {
-      case 'LibraryInfo':
-        return (dynamic positional(int i, [dynamic defaultValue]),
-                dynamic named(String name, [dynamic defaultValue])) =>
-            new LibraryInfo(positional(0),
-                categories: named('categories', ''),
-                dart2jsPath: named('dart2jsPath'),
-                dart2jsPatchPath: named('dart2jsPatchPath'),
-                implementation: named('implementation', false),
-                documented: named('documented', true),
-                maturity: named('maturity', Maturity.UNSPECIFIED),
-                platforms: named('platforms', DART2JS_PLATFORM | VM_PLATFORM));
-      case 'Maturity':
-        return (dynamic positional(int i, [dynamic defaultValue]),
-                dynamic named(String name, [dynamic defaultValue])) =>
-            new Maturity(positional(0), positional(1), positional(2));
-      default:
-        throw new UnimplementedError(
-            'Unexpected constructor reference: ${reference.name}');
-    }
-  }
-
-  /// Compute the value referred to by [entityRef].
-  dynamic _findReference(EntityRef entityRef) {
-    // This method is not fully general; we only support the references that we
-    // expect to find in LibraryInfo.
-    assert(entityRef.implicitFunctionTypeIndices.isEmpty);
-    assert(entityRef.paramReference == 0);
-    assert(entityRef.syntheticParams.isEmpty);
-    assert(entityRef.syntheticReturnType == null);
-    assert(entityRef.typeArguments.isEmpty);
-    var reference = context.references[entityRef.reference];
-    if (reference.prefixReference == 0) {
-      return context.topLevelConstants[reference.name].value;
-    } else {
-      assert(reference.prefixReference != 0);
-      var prefixReference = context.references[reference.prefixReference];
-      assert(prefixReference.name == 'Maturity');
-      assert(prefixReference.prefixReference == 0);
-      return context.maturityConstants[reference.name].value;
-    }
-  }
-
-  /// Compute the value of the constant.
-  dynamic _materialize() {
-    var stack = [];
-    var stringIndex = 0;
-    var intIndex = 0;
-    var referenceIndex = 0;
-    List popItems(int count) {
-      var items = stack.sublist(stack.length - count, stack.length);
-      stack.length -= count;
-      return items;
-    }
-
-    for (var operation in expr.operations) {
-      switch (operation) {
-        case UnlinkedExprOperation.pushString:
-          stack.add(expr.strings[stringIndex++]);
-          break;
-        case UnlinkedExprOperation.invokeConstructor:
-          var namedArgumentList = popItems(expr.ints[intIndex++]);
-          var namedArguments = <String, dynamic>{};
-          for (var namedArgument in namedArgumentList) {
-            namedArguments[expr.strings[stringIndex++]] = namedArgument;
-          }
-          var positionalArguments = popItems(expr.ints[intIndex++]);
-          stack.add(_findConstructor(expr.references[referenceIndex++])(
-              (i, [defaultValue]) => i < positionalArguments.length
-                  ? positionalArguments[i]
-                  : defaultValue,
-              (name, [defaultValue]) => namedArguments.containsKey(name)
-                  ? namedArguments[name]
-                  : defaultValue));
-          break;
-        case UnlinkedExprOperation.makeUntypedMap:
-          var map = {};
-          var numKeyValuePairs = expr.ints[intIndex++];
-          var keyValueList = popItems(numKeyValuePairs * 2);
-          for (var i = 0; i < numKeyValuePairs; i++) {
-            map[keyValueList[2 * i]] = keyValueList[2 * i + 1];
-          }
-          stack.add(map);
-          break;
-        case UnlinkedExprOperation.pushReference:
-          stack.add(_findReference(expr.references[referenceIndex++]));
-          break;
-        case UnlinkedExprOperation.pushInt:
-          stack.add(expr.ints[intIndex++]);
-          break;
-        case UnlinkedExprOperation.pushFalse:
-          stack.add(false);
-          break;
-        case UnlinkedExprOperation.pushTrue:
-          stack.add(true);
-          break;
-        case UnlinkedExprOperation.bitOr:
-          var y = stack.removeLast();
-          var x = stack.removeLast();
-          stack.add(x | y);
-          break;
-        default:
-          throw new UnimplementedError(
-              'Unexpected expression in libraries.dart: $operation');
-      }
-    }
-    assert(stringIndex == expr.strings.length);
-    assert(intIndex == expr.ints.length);
-    assert(referenceIndex == expr.references.length);
-    assert(stack.length == 1);
-    if (stack[0] == null) {
-      throw new StateError('Unexpected null constant in libraries.dart');
-    }
-    return stack[0];
-  }
-}