Johnni Winther
5b7968346d
This adds a third reference to Field declaration, so that we know have three references, one for each use case: 1) fieldReference used for initialization; in FieldInitializer and as the key in the InstanceConstant.fieldValues map. 2) getterReference used for reading; in InstanceGet, StaticGet and SuperPropertyGet 3) setterReference used for writing; in InstanceSet, StaticSet and SuperPropertySet TEST=existing Change-Id: I223f130e808e7f19a831c1fe5e3a4725d1bcdc3b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/203770 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Jens Johansen <jensj@google.com>
73 lines
2.4 KiB
Dart
73 lines
2.4 KiB
Dart
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library kernel.external_name;
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import 'ast.dart';
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import 'core_types.dart';
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/// Returns external (native) name of given [Member].
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String? getExternalName(CoreTypes coreTypes, Member procedure) {
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// Native procedures are marked as external and have an annotation,
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// which looks like this:
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//
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// @pragma("vm:external-name", "<name-of-native>")
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// external Object foo(arg0, ...);
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//
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// Previously the following encoding was used, which is still supported
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// until all users are migrated away from it:
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//
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// import 'dart:_internal' as internal;
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//
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// @internal.ExternalName("<name-of-native>")
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// external Object foo(arg0, ...);
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//
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if (!procedure.isExternal) {
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return null;
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}
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for (final Expression annotation in procedure.annotations) {
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final String? value = _getExternalNameValue(coreTypes, annotation);
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if (value != null) {
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return value;
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}
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}
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return null;
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}
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String? _getExternalNameValue(CoreTypes coreTypes, Expression annotation) {
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if (annotation is ConstantExpression) {
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final Constant constant = annotation.constant;
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if (constant is InstanceConstant) {
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if (_isExternalName(constant.classNode)) {
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return (constant.fieldValues.values.single as StringConstant).value;
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} else if (_isPragma(constant.classNode)) {
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final String pragmaName =
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(constant.fieldValues[coreTypes.pragmaName.fieldReference]
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as StringConstant)
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.value;
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final Constant? pragmaOptionsValue =
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constant.fieldValues[coreTypes.pragmaOptions.fieldReference];
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final String? pragmaOptions = pragmaOptionsValue is StringConstant
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? pragmaOptionsValue.value
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: null;
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if (pragmaName == _externalNamePragma && pragmaOptions != null) {
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return pragmaOptions;
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}
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}
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}
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}
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return null;
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}
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bool _isExternalName(Class klass) =>
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klass.name == 'ExternalName' &&
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klass.enclosingLibrary.importUri.toString() == 'dart:_internal';
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bool _isPragma(Class klass) =>
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klass.name == 'pragma' &&
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klass.enclosingLibrary.importUri.toString() == 'dart:core';
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const String _externalNamePragma = 'vm:external-name';
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