Alexander Markov
828a168622
Change-Id: If47ef9ef4ff5ac3cb3f4f6737590370b647fc9ff Reviewed-on: https://dart-review.googlesource.com/59180 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Régis Crelier <regis@google.com>
42 lines
1.3 KiB
Dart
42 lines
1.3 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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/// Returns external (native) name of given [Member].
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String getExternalName(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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// 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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if (annotation is ConstructorInvocation) {
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if (_isExternalName(annotation.target.enclosingClass)) {
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return (annotation.arguments.positional.single as StringLiteral).value;
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}
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} else if (annotation is ConstantExpression) {
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final constant = annotation.constant;
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if (constant is InstanceConstant) {
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if (_isExternalName(constant.klass)) {
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return (constant.fieldValues.values.single as StringConstant).value;
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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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