Nicholas Shahan
4d9b28dc08
When compiling the Dart SDK with the `--canary` flag DDC will include the new shared runtime type library in the compiled SDK. Change-Id: I7a418033fb7397939aa6f4b7fb84820ead99c3be Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/241690 Commit-Queue: Nicholas Shahan <nshahan@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com> Reviewed-by: Anna Gringauze <annagrin@google.com>
75 lines
2.3 KiB
Dart
75 lines
2.3 KiB
Dart
// 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.
|
|
|
|
import 'package:js_shared/synced/embedded_names.dart'
|
|
show RtiUniverseFieldNames;
|
|
|
|
import '../js_ast/js_ast.dart';
|
|
|
|
/// Simplify `(args) => (() => { ... })()` to `(args) => { ... }`.
|
|
// TODO(jmesserly): find a better home for this function
|
|
Fun simplifyPassThroughArrowFunCallBody(Fun fn) {
|
|
if (fn.body.statements.length == 1) {
|
|
var stat = fn.body.statements.single;
|
|
if (stat is Return && stat.value is Call) {
|
|
var call = stat.value as Call;
|
|
var innerFun = call.target;
|
|
if (innerFun is ArrowFun &&
|
|
call.arguments.isEmpty &&
|
|
innerFun.params.isEmpty) {
|
|
var body = innerFun.body;
|
|
if (body is Block) {
|
|
return Fun(fn.params, body);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return fn;
|
|
}
|
|
|
|
Set<String> findMutatedVariables(Node scope) {
|
|
var v = MutationVisitor();
|
|
scope.accept(v);
|
|
return v.mutated;
|
|
}
|
|
|
|
class MutationVisitor extends BaseVisitorVoid {
|
|
/// Using Identifier names instead of a more precise key may result in
|
|
/// mutations being imprecisely reported when variables shadow each other.
|
|
final mutated = <String>{};
|
|
@override
|
|
void visitAssignment(node) {
|
|
var id = node.leftHandSide;
|
|
if (id is Identifier) mutated.add(id.name);
|
|
super.visitAssignment(node);
|
|
}
|
|
}
|
|
|
|
/// Recursively clears all source information from all visited nodes.
|
|
class SourceInformationClearer extends BaseVisitorVoid {
|
|
@override
|
|
void visitNode(Node node) {
|
|
node.visitChildren(this);
|
|
node.sourceInformation = null;
|
|
}
|
|
}
|
|
|
|
/// Returns an expression that creates the initial Rti Universe.
|
|
///
|
|
/// This needs to be kept in sync with `_Universe.create` in `dart:_rti`.
|
|
Expression createRtiUniverse() {
|
|
Property initField(String name, String value) =>
|
|
Property(js.string(name), js(value));
|
|
|
|
var universeFields = [
|
|
initField(RtiUniverseFieldNames.evalCache, 'new Map()'),
|
|
initField(RtiUniverseFieldNames.typeRules, '{}'),
|
|
initField(RtiUniverseFieldNames.erasedTypes, '{}'),
|
|
initField(RtiUniverseFieldNames.typeParameterVariances, '{}'),
|
|
initField(RtiUniverseFieldNames.sharedEmptyArray, '[]'),
|
|
];
|
|
|
|
return ObjectInitializer(universeFields);
|
|
}
|