Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/reflection_data_parser.dart

Index: sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/reflection_data_parser.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/reflection_data_parser.dart b/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/reflection_data_parser.dart
deleted file mode 100644
index a1d3610313a000087529643d0c114996f2b51616..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/reflection_data_parser.dart
+++ /dev/null
@@ -1,409 +0,0 @@
-// Copyright (c) 2013, 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.
-
-part of dart2js.js_emitter;
-
-// TODO(ahe): Share these with js_helper.dart.
-const FUNCTION_INDEX = 0;
-const NAME_INDEX = 1;
-const CALL_NAME_INDEX = 2;
-const REQUIRED_PARAMETER_INDEX = 3;
-const OPTIONAL_PARAMETER_INDEX = 4;
-const DEFAULT_ARGUMENTS_INDEX = 5;
-
-const bool VALIDATE_DATA = false;
-
-// TODO(ahe): This code should be integrated in CodeEmitterTask.finishClasses.
-jsAst.Expression getReflectionDataParser(String classesCollector,
-                                        JavaScriptBackend backend) {
-  Namer namer = backend.namer;
-  Compiler compiler = backend.compiler;
-  CodeEmitterTask emitter = backend.emitter;
-
-  String metadataField = '"${namer.metadataField}"';
-  String reflectableField = namer.reflectableField;
-
-  // TODO(ahe): Move this string constants to namer.
-  String reflectionInfoField = r'$reflectionInfo';
-  String reflectionNameField = r'$reflectionName';
-  String metadataIndexField = r'$metadataIndex';
-
-  String defaultValuesField = namer.defaultValuesField;
-  String methodsWithOptionalArgumentsField =
-      namer.methodsWithOptionalArgumentsField;
-
-  String unmangledNameIndex = backend.mustRetainMetadata
-      ? ' 3 * optionalParameterCount + 2 * requiredParameterCount + 3'
-      : ' 2 * optionalParameterCount + requiredParameterCount + 3';
-
-  jsAst.Expression typeInformationAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.TYPE_INFORMATION);
-  jsAst.Expression globalFunctionsAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.GLOBAL_FUNCTIONS);
-  jsAst.Expression staticsAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.STATICS);
-  jsAst.Expression interceptedNamesAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.INTERCEPTED_NAMES);
-  jsAst.Expression mangledGlobalNamesAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.MANGLED_GLOBAL_NAMES);
-  jsAst.Expression mangledNamesAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.MANGLED_NAMES);
-  jsAst.Expression librariesAccess =
-      emitter.generateEmbeddedGlobalAccess(embeddedNames.LIBRARIES);
-
-  jsAst.Statement header = js.statement('''
-// [map] returns an object literal that V8 shouldn not try to optimize with a
-// hidden class. This prevents a potential performance problem where V8 tries
-// to build a hidden class for an object used as a hashMap.
-// It requires fewer characters to declare a variable as a parameter than
-// with `var`.
-  function map(x){x=Object.create(null);x.x=0;delete x.x;return x}
-''');
-
-  jsAst.Statement processStatics = js.statement('''
-    function processStatics(descriptor) {
-      for (var property in descriptor) {
-        if (!hasOwnProperty.call(descriptor, property)) continue;
-        if (property === "${namer.classDescriptorProperty}") continue;
-        var element = descriptor[property];
-        var firstChar = property.substring(0, 1);
-        var previousProperty;
-        if (firstChar === "+") {
-          mangledGlobalNames[previousProperty] = property.substring(1);
-          var flag = descriptor[property];
-          if (flag > 0)
-            descriptor[previousProperty].$reflectableField = flag;
-          if (element && element.length)
-            #[previousProperty] = element;  // embedded typeInformation.
-        } else if (firstChar === "@") {
-          property = property.substring(1);
-          ${namer.currentIsolate}[property][$metadataField] = element;
-        } else if (firstChar === "*") {
-          globalObject[previousProperty].$defaultValuesField = element;
-          var optionalMethods = descriptor.$methodsWithOptionalArgumentsField;
-          if (!optionalMethods) {
-            descriptor.$methodsWithOptionalArgumentsField = optionalMethods = {}
-          }
-          optionalMethods[property] = previousProperty;
-        } else if (typeof element === "function") {
-          globalObject[previousProperty = property] = element;
-          functions.push(property);
-          #[property] = element;  // embedded globalFunctions.
-        } else if (element.constructor === Array) {
-          addStubs(globalObject, element, property,
-                   true, descriptor, functions);
-        } else {
-          previousProperty = property;
-          var newDesc = {};
-          var previousProp;
-          for (var prop in element) {
-            if (!hasOwnProperty.call(element, prop)) continue;
-            firstChar = prop.substring(0, 1);
-            if (prop === "static") {
-              processStatics(#[property] = element[prop]);  // embedded statics.
-            } else if (firstChar === "+") {
-              mangledNames[previousProp] = prop.substring(1);
-              var flag = element[prop];
-              if (flag > 0)
-                element[previousProp].$reflectableField = flag;
-            } else if (firstChar === "@" && prop !== "@") {
-              newDesc[prop.substring(1)][$metadataField] = element[prop];
-            } else if (firstChar === "*") {
-              newDesc[previousProp].$defaultValuesField = element[prop];
-              var optionalMethods = newDesc.$methodsWithOptionalArgumentsField;
-              if (!optionalMethods) {
-                newDesc.$methodsWithOptionalArgumentsField = optionalMethods={}
-              }
-              optionalMethods[prop] = previousProp;
-            } else {
-              var elem = element[prop];
-              if (prop !== "${namer.classDescriptorProperty}" &&
-                  elem != null &&
-                  elem.constructor === Array &&
-                  prop !== "<>") {
-                addStubs(newDesc, elem, prop, false, element, []);
-              } else {
-                newDesc[previousProp = prop] = elem;
-              }
-            }
-          }
-          $classesCollector[property] = [globalObject, newDesc];
-          classes.push(property);
-        }
-      }
-    }
-''', [typeInformationAccess, globalFunctionsAccess, staticsAccess]);
-
-
-  /**
-   * See [dart2js.js_emitter.ContainerBuilder.addMemberMethod] for format of
-   * [array].
-   */
-  jsAst.Statement addStubs = js.statement('''
-  function addStubs(descriptor, array, name, isStatic,
-                    originalDescriptor, functions) {
-    var f, funcs =
-        [originalDescriptor[name] =
-        descriptor[name] = f = ${readFunction("array", "$FUNCTION_INDEX")}];
-    f.\$stubName = name;
-    functions.push(name);
-    for (var index = $FUNCTION_INDEX; index < array.length; index += 2) {
-      f = array[index + 1];
-      if (typeof f != "function") break;
-      f.\$stubName = ${readString("array", "index + 2")};
-      funcs.push(f);
-      if (f.\$stubName) {
-        originalDescriptor[f.\$stubName] = descriptor[f.\$stubName] = f;
-        functions.push(f.\$stubName);
-      }
-    }
-    for (var i = 0; i < funcs.length; index++, i++) {
-      funcs[i].\$callName = ${readString("array", "index + 1")};
-    }
-    var getterStubName = ${readString("array", "++index")};
-    array = array.slice(++index);
-    var requiredParameterInfo = ${readInt("array", "0")};
-    var requiredParameterCount = requiredParameterInfo >> 1;
-    var isAccessor = (requiredParameterInfo & 1) === 1;
-    var isSetter = requiredParameterInfo === 3;
-    var isGetter = requiredParameterInfo === 1;
-    var optionalParameterInfo = ${readInt("array", "1")};
-    var optionalParameterCount = optionalParameterInfo >> 1;
-    var optionalParametersAreNamed = (optionalParameterInfo & 1) === 1;
-    var isIntercepted =
-           requiredParameterCount + optionalParameterCount != funcs[0].length;
-    var functionTypeIndex = ${readFunctionType("array", "2")};
-    var unmangledNameIndex = $unmangledNameIndex;
-    var isReflectable = array.length > unmangledNameIndex;
-
-    if (getterStubName) {
-      f = tearOff(funcs, array, isStatic, name, isIntercepted);
-      descriptor[name].\$getter = f;
-      f.\$getterStub = true;
-      // Used to create an isolate using spawnFunction.
-      if (isStatic) #[name] = f;  // embedded globalFunctions.
-      originalDescriptor[getterStubName] = descriptor[getterStubName] = f;
-      funcs.push(f);
-      if (getterStubName) functions.push(getterStubName);
-      f.\$stubName = getterStubName;
-      f.\$callName = null;
-      if (isIntercepted) #[getterStubName] = true; // embedded interceptedNames.
-    }
-    if (isReflectable) {
-      for (var i = 0; i < funcs.length; i++) {
-        funcs[i].$reflectableField = 1;
-        funcs[i].$reflectionInfoField = array;
-      }
-      var mangledNames = isStatic ? # : #;  // embedded mangledGlobalNames, mangledNames
-      var unmangledName = ${readString("array", "unmangledNameIndex")};
-      // The function is either a getter, a setter, or a method.
-      // If it is a method, it might also have a tear-off closure.
-      // The unmangledName is the same as the getter-name.
-      var reflectionName = unmangledName;
-      if (getterStubName) mangledNames[getterStubName] = reflectionName;
-      if (isSetter) {
-        reflectionName += "=";
-      } else if (!isGetter) {
-        reflectionName += ":" + requiredParameterCount +
-          ":" + optionalParameterCount;
-      }
-      mangledNames[name] = reflectionName;
-      funcs[0].$reflectionNameField = reflectionName;
-      funcs[0].$metadataIndexField = unmangledNameIndex + 1;
-      if (optionalParameterCount) descriptor[unmangledName + "*"] = funcs[0];
-    }
-  }
-''', [globalFunctionsAccess, interceptedNamesAccess,
-      mangledGlobalNamesAccess, mangledNamesAccess]);
-
-  List<jsAst.Statement> tearOffCode = buildTearOffCode(backend);
-
-  jsAst.Statement init = js.statement('''{
-  var functionCounter = 0;
-  var tearOffGetter = (typeof dart_precompiled == "function")
-      ? tearOffGetterCsp : tearOffGetterNoCsp;
-  if (!#) # = [];  // embedded libraries.
-  if (!#) # = map();  // embedded mangledNames.
-  if (!#) # = map();  // embedded mangledGlobalNames.
-  if (!#) # = map();  // embedded statics.
-  if (!#) # = map();  // embedded typeInformation.
-  if (!#) # = map();  // embedded globalFunctions.
-  if (!#) # = map();  // embedded interceptedNames.
-  var libraries = #;  // embeded libraries.
-  var mangledNames = #;  // embedded mangledNames.
-  var mangledGlobalNames = #;  // embedded mangledGlobalNames.
-  var hasOwnProperty = Object.prototype.hasOwnProperty;
-  var length = reflectionData.length;
-  for (var i = 0; i < length; i++) {
-    var data = reflectionData[i];
-
-// [data] contains these elements:
-// 0. The library name (not unique).
-// 1. The library URI (unique).
-// 2. A function returning the metadata associated with this library.
-// 3. The global object to use for this library.
-// 4. An object literal listing the members of the library.
-// 5. This element is optional and if present it is true and signals that this
-// library is the root library (see dart:mirrors IsolateMirror.rootLibrary).
-//
-// The entries of [data] are built in [assembleProgram] above.
-
-    var name = data[0];
-    var uri = data[1];
-    var metadata = data[2];
-    var globalObject = data[3];
-    var descriptor = data[4];
-    var isRoot = !!data[5];
-    var fields = descriptor && descriptor["${namer.classDescriptorProperty}"];
-    if (fields instanceof Array) fields = fields[0];
-    var classes = [];
-    var functions = [];
-    processStatics(descriptor);
-    libraries.push([name, uri, classes, functions, metadata, fields, isRoot,
-                    globalObject]);
-  }
-}''', [librariesAccess, librariesAccess,
-       mangledNamesAccess, mangledNamesAccess,
-       mangledGlobalNamesAccess, mangledGlobalNamesAccess,
-       staticsAccess, staticsAccess,
-       typeInformationAccess, typeInformationAccess,
-       globalFunctionsAccess, globalFunctionsAccess,
-       interceptedNamesAccess, interceptedNamesAccess,
-       librariesAccess,
-       mangledNamesAccess,
-       mangledGlobalNamesAccess]);
-
-  return js('''
-(function (reflectionData) {
-  "use strict";
-  #; // header
-  #; // processStatics
-  #; // addStubs
-  #; // tearOffCode
-  #; // init
-})''', [header, processStatics, addStubs, tearOffCode, init]);
-}
-
-
-List<jsAst.Statement> buildTearOffCode(JavaScriptBackend backend) {
-  Namer namer = backend.namer;
-  Compiler compiler = backend.compiler;
-
-  Element closureFromTearOff = backend.findHelper('closureFromTearOff');
-  String tearOffAccessText;
-  jsAst.Expression tearOffAccessExpression;
-  String tearOffGlobalObjectName;
-  String tearOffGlobalObject;
-  if (closureFromTearOff != null) {
-    // We need both the AST that references [closureFromTearOff] and a string
-    // for the NoCsp version that constructs a function.
-    tearOffAccessExpression = namer.elementAccess(closureFromTearOff);
-    tearOffAccessText =
-        jsAst.prettyPrint(tearOffAccessExpression, compiler).getText();
-    tearOffGlobalObjectName = tearOffGlobalObject =
-        namer.globalObjectFor(closureFromTearOff);
-  } else {
-    // Default values for mocked-up test libraries.
-    tearOffAccessText =
-        r'''function() { throw 'Helper \'closureFromTearOff\' missing.' }''';
-    tearOffAccessExpression = js(tearOffAccessText);
-    tearOffGlobalObjectName = 'MissingHelperFunction';
-    tearOffGlobalObject = '($tearOffAccessText())';
-  }
-
-  // This template is uncached because it is constructed from code fragments
-  // that can change from compilation to compilation.  Some of these could be
-  // avoided, except for the string literals that contain the compiled access
-  // path to 'closureFromTearOff'.
-  jsAst.Statement tearOffGetterNoCsp = js.uncachedStatementTemplate('''
-    function tearOffGetterNoCsp(funcs, reflectionInfo, name, isIntercepted) {
-      return isIntercepted
-          ? new Function("funcs", "reflectionInfo", "name",
-                         "$tearOffGlobalObjectName", "c",
-              "return function tearOff_" + name + (functionCounter++)+ "(x) {" +
-                "if (c === null) c = $tearOffAccessText(" +
-                    "this, funcs, reflectionInfo, false, [x], name);" +
-                "return new c(this, funcs[0], x, name);" +
-              "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null)
-          : new Function("funcs", "reflectionInfo", "name",
-                         "$tearOffGlobalObjectName", "c",
-              "return function tearOff_" + name + (functionCounter++)+ "() {" +
-                "if (c === null) c = $tearOffAccessText(" +
-                    "this, funcs, reflectionInfo, false, [], name);" +
-                "return new c(this, funcs[0], null, name);" +
-              "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null);
-    }''').instantiate([]);
-
-  jsAst.Statement tearOffGetterCsp = js.statement('''
-    function tearOffGetterCsp(funcs, reflectionInfo, name, isIntercepted) {
-      var cache = null;
-      return isIntercepted
-          ? function(x) {
-              if (cache === null) cache = #(
-                  this, funcs, reflectionInfo, false, [x], name);
-              return new cache(this, funcs[0], x, name);
-            }
-          : function() {
-              if (cache === null) cache = #(
-                  this, funcs, reflectionInfo, false, [], name);
-              return new cache(this, funcs[0], null, name);
-            };
-    }''', [tearOffAccessExpression, tearOffAccessExpression]);
-
-  jsAst.Statement tearOff = js.statement('''
-    function tearOff(funcs, reflectionInfo, isStatic, name, isIntercepted) {
-      var cache;
-      return isStatic
-          ? function() {
-              if (cache === void 0) cache = #(
-                  this, funcs, reflectionInfo, true, [], name).prototype;
-              return cache;
-            }
-          : tearOffGetter(funcs, reflectionInfo, name, isIntercepted);
-    }''', tearOffAccessExpression);
-
-  return <jsAst.Statement>[tearOffGetterNoCsp, tearOffGetterCsp, tearOff];
-}
-
-
-String readString(String array, String index) {
-  return readChecked(
-      array, index, 'result != null && typeof result != "string"', 'string');
-}
-
-String readInt(String array, String index) {
-  return readChecked(
-      array, index,
-      'result != null && (typeof result != "number" || (result|0) !== result)',
-      'int');
-}
-
-String readFunction(String array, String index) {
-  return readChecked(
-      array, index, 'result != null && typeof result != "function"',
-      'function');
-}
-
-String readFunctionType(String array, String index) {
-  return readChecked(
-      array, index,
-      'result != null && '
-      '(typeof result != "number" || (result|0) !== result) && '
-      'typeof result != "function"',
-      'function or int');
-}
-
-String readChecked(String array, String index, String check, String type) {
-  if (!VALIDATE_DATA) return '$array[$index]';
-  return '''
-(function() {
-  var result = $array[$index];
-  if ($check) {
-    throw new Error(
-        name + ": expected value of type \'$type\' at index " + ($index) +
-        " but got " + (typeof result));
-  }
-  return result;
-})()''';
-}