Reapply "Tweak public APIs and use them in patch_sdk, dart2js, and kernel-service.""

pkg/compiler/lib/src/kernel/fasta_support.dart

Index: pkg/compiler/lib/src/kernel/fasta_support.dart
diff --git a/pkg/compiler/lib/src/kernel/fasta_support.dart b/pkg/compiler/lib/src/kernel/fasta_support.dart
deleted file mode 100644
index 9fbe3f450314f8244f938f0a759529d7ba9df500..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/kernel/fasta_support.dart
+++ /dev/null
@@ -1,201 +0,0 @@
-// Copyright (c) 2017, 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.
-
-/// Additions to Fasta for generating .dill (Kernel IR) files with dart2js patch
-/// files and native hooks.
-library compiler.src.kernel.fasta_support;
-
-// TODO(sigmund): get rid of this file. Fasta should be agnostic of the
-// target platform, at which point this should not be necessary. In particular,
-// we need to:
-//  - add a fasta flag to configure the platform library location.
-//  - add a fasta flag to specify which sdk libraries should be built-in
-//    (that would replace `loadExtraRequiredLibraries`).
-//  - add flags to fasta to turn on various transformations.
-//  - get rid of `native` in dart2js patches or unify the syntax with the VM.
-
-import 'dart:async' show Future;
-import 'dart:io' show exitCode;
-
-import 'package:front_end/file_system.dart';
-import 'package:front_end/physical_file_system.dart';
-import 'package:front_end/src/fasta/kernel/utils.dart';
-import 'package:kernel/ast.dart' show Source, Library;
-import 'package:kernel/target/targets.dart' show TargetFlags, NoneTarget;
-
-import 'package:front_end/src/fasta/builder/builder.dart' show LibraryBuilder;
-import 'package:front_end/src/fasta/compiler_context.dart' show CompilerContext;
-import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget;
-import 'package:front_end/src/fasta/fasta.dart' show CompileTask;
-import 'package:front_end/src/fasta/kernel/kernel_target.dart'
-    show KernelTarget;
-import 'package:front_end/src/fasta/loader.dart' show Loader;
-import 'package:front_end/src/fasta/parser/parser.dart' show optional;
-import 'package:front_end/src/fasta/source/source_loader.dart'
-    show SourceLoader;
-import 'package:front_end/src/scanner/token.dart' show Token;
-import 'package:front_end/src/fasta/ticker.dart' show Ticker;
-import 'package:front_end/src/fasta/translate_uri.dart' show TranslateUri;
-
-import 'package:compiler/src/native/native.dart' show maybeEnableNative;
-
-/// Generates a platform.dill file containing the compiled Kernel IR of the
-/// dart2js SDK.
-Future compilePlatform(Uri patchedSdk, Uri fullOutput,
-    {Uri outlineOutput, Uri packages}) async {
-  Uri deps = Uri.base.resolveUri(new Uri.file("${fullOutput.toFilePath()}.d"));
-  TranslateUri uriTranslator = await TranslateUri
-      .parse(PhysicalFileSystem.instance, patchedSdk, packages: packages);
-  var ticker = new Ticker(isVerbose: false);
-  var dillTarget = new DillTargetForDart2js(ticker, uriTranslator);
-  var kernelTarget =
-      new KernelTargetForDart2js(dillTarget, uriTranslator, false);
-
-  kernelTarget.read(Uri.parse("dart:core"));
-  await dillTarget.buildOutlines();
-  var outline = await kernelTarget.buildOutlines();
-  await writeProgramToFile(outline, outlineOutput);
-  ticker.logMs("Wrote outline to ${outlineOutput.toFilePath()}");
-
-  if (exitCode != 0) return null;
-  var program = await kernelTarget.buildProgram();
-  await writeProgramToFile(program, fullOutput);
-  ticker.logMs("Wrote program to ${fullOutput.toFilePath()}");
-  await kernelTarget.writeDepsFile(fullOutput, deps);
-}
-
-/// Extends the internal fasta [CompileTask] to use a dart2js-aware [DillTarget]
-/// and [KernelTarget].
-class Dart2jsCompileTask extends CompileTask {
-  Dart2jsCompileTask(CompilerContext c, Ticker ticker) : super(c, ticker);
-
-  @override
-  DillTarget createDillTarget(TranslateUri uriTranslator) {
-    return new DillTargetForDart2js(ticker, uriTranslator);
-  }
-
-  @override
-  KernelTarget createKernelTarget(
-      DillTarget dillTarget, TranslateUri uriTranslator, bool strongMode) {
-    return new KernelTargetForDart2js(
-        dillTarget, uriTranslator, strongMode, c.uriToSource);
-  }
-}
-
-/// Specializes [KernelTarget] to build kernel for dart2js: no transformations
-/// are run, JS-specific libraries are included in the SDK, and native clauses
-/// have no string parameter.
-class KernelTargetForDart2js extends KernelTarget {
-  KernelTargetForDart2js(
-      DillTarget target, TranslateUri uriTranslator, bool strongMode,
-      [Map<String, Source> uriToSource])
-      : super(PhysicalFileSystem.instance, target, uriTranslator, uriToSource);
-  @override
-  SourceLoader<Library> createLoader() =>
-      new SourceLoaderForDart2js<Library>(fileSystem, this);
-
-  @override
-  bool enableNative(LibraryBuilder library) => maybeEnableNative(library.uri);
-
-  @override
-  Token skipNativeClause(Token token) => _skipNative(token);
-
-  @override
-  String extractNativeMethodName(Token token) => "";
-
-  @override
-  void loadExtraRequiredLibraries(Loader loader) => _loadExtras(loader);
-
-  @override
-  void runBuildTransformations() {}
-}
-
-/// Specializes [SourceLoader] to build kernel for dart2js: dart2js extends
-/// bool, int, num, double, and String in a different platform library than
-/// `dart:core`.
-class SourceLoaderForDart2js<L> extends SourceLoader<L> {
-  LibraryBuilder interceptorsLibrary;
-
-  @override
-  LibraryBuilder read(Uri uri, int charOffset,
-      {Uri fileUri, LibraryBuilder accessor, bool isPatch: false}) {
-    var library = super.read(uri, charOffset,
-        fileUri: fileUri, accessor: accessor, isPatch: isPatch);
-    if (uri.scheme == 'dart' && uri.path == '_interceptors') {
-      interceptorsLibrary = library;
-    }
-    return library;
-  }
-
-  @override
-  bool canImplementRestrictedTypes(LibraryBuilder library) =>
-      library == coreLibrary || library == interceptorsLibrary;
-
-  SourceLoaderForDart2js(FileSystem fs, KernelTarget target)
-      : super(fs, target);
-}
-
-/// Specializes [DillTarget] to build kernel for dart2js: JS-specific libraries
-/// are included in the SDK, and native clauses have no string parameter.
-class DillTargetForDart2js extends DillTarget {
-  DillTargetForDart2js(Ticker ticker, TranslateUri uriTranslator)
-      : super(ticker, uriTranslator, new NoneTarget(new TargetFlags()));
-
-  @override
-  Token skipNativeClause(Token token) => _skipNative(token);
-
-  @override
-  String extractNativeMethodName(Token token) => "";
-
-  @override
-  void loadExtraRequiredLibraries(Loader loader) => _loadExtras(loader);
-}
-
-/// We use native clauses of this form in our dart2js patch files:
-///
-///     methodDeclaration() native;
-///
-/// The default front_end parser doesn't support this, so it will trigger an
-/// error recovery condition. This function is used while parsing to detect this
-/// form and continue parsing.
-///
-/// Note that `native` isn't part of the Dart Language Specification, and the VM
-/// uses it a slightly different form. We hope to remove this syntax in our
-/// dart2js patch files and replace it with the external modifier.
-Token _skipNative(Token token) {
-  if (!optional("native", token)) return null;
-  if (!optional(";", token.next)) return null;
-  return token;
-}
-
-void _loadExtras(Loader loader) {
-  for (String uri in _extraDart2jsLibraries) {
-    loader.read(Uri.parse(uri), -1);
-  }
-}
-
-const _extraDart2jsLibraries = const <String>[
-  'dart:_chrome',
-  'dart:_foreign_helper',
-  'dart:_interceptors',
-  'dart:_internal',
-  'dart:_isolate_helper',
-  'dart:_js_embedded_names',
-  'dart:_js_helper',
-  'dart:_js_mirrors',
-  'dart:_js_names',
-  'dart:_native_typed_data',
-  'dart:async',
-  'dart:collection',
-  'dart:html',
-  'dart:html_common',
-  'dart:indexed_db',
-  'dart:js',
-  'dart:js_util',
-  'dart:mirrors',
-  'dart:svg',
-  'dart:web_audio',
-  'dart:web_gl',
-  'dart:web_sql',
-];