source: webkit/trunk/Source/JavaScriptCore/parser/NodesAnalyzeModule.cpp

Last change on this file was 267186, checked in by [email protected], 5 years ago

Support export namespace export * as ns
​https://bugs.webkit.org/show_bug.cgi?id=214379

Reviewed by Ross Kirsling.

JSTests:

  • stress/modules-syntax-error.js:
  • stress/modules-syntax.js:
  • test262/expectations.yaml:

Source/JavaScriptCore:

This patch supports export * as ns from "module" syntax. If it is used, we expose "module"'s namespace object as "ns".
For each module environment, we create *namespace* (starNamespace) private symbol scope variable. And we fill it later
with module namespace object. This way allows us to use module namespace object IC and super fast imported module binding
lookup though environment variable lookup mechanism.

  • builtins/BuiltinNames.h:
  • bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::BytecodeGenerator):

  • parser/NodesAnalyzeModule.cpp:

(JSC::ExportNamedDeclarationNode::analyzeModule):

  • parser/Parser.cpp:

(JSC::Parser<LexerType>::parseExportDeclaration):

  • runtime/AbstractModuleRecord.cpp:

(JSC::AbstractModuleRecord::ExportEntry::createNamespace):
(JSC::AbstractModuleRecord::resolveExportImpl):
(JSC::AbstractModuleRecord::getModuleNamespace):
(JSC::AbstractModuleRecord::setModuleEnvironment):
(JSC::AbstractModuleRecord::dump):

  • runtime/AbstractModuleRecord.h:
  • runtime/CommonIdentifiers.h:
  • runtime/JSFunction.cpp:

(JSC::JSFunction::name):
(JSC::JSFunction::reifyName):

  • runtime/JSModuleNamespaceObject.cpp:

(JSC::JSModuleNamespaceObject::getOwnPropertySlotCommon):

  • runtime/JSModuleRecord.cpp:

(JSC::JSModuleRecord::instantiateDeclarations):
(JSC::JSModuleRecord::evaluate):

  • wasm/js/JSWebAssemblyModule.cpp:

(JSC::JSWebAssemblyModule::finishCreation):

  • wasm/js/WebAssemblyModuleRecord.cpp:

(JSC::WebAssemblyModuleRecord::link):
File size: 4.0 KB
Line 
1/*
2 * Copyright (C) 2015 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "Nodes.h"
28
29#include "JSCJSValueInlines.h"
30#include "JSModuleRecord.h"
31#include "ModuleAnalyzer.h"
32
33namespace JSC {
34
35void ScopeNode::analyzeModule(ModuleAnalyzer& analyzer)
36{
37 m_statements->analyzeModule(analyzer);
38}
39
40void SourceElements::analyzeModule(ModuleAnalyzer& analyzer)
41{
42 // In the module analyzer phase, only module declarations are included in the top-level SourceElements.
43 for (StatementNode* statement = m_head; statement; statement = statement->next()) {
44 ASSERT(statement->isModuleDeclarationNode());
45 static_cast<ModuleDeclarationNode*>(statement)->analyzeModule(analyzer);
46 }
47}
48
49void ImportDeclarationNode::analyzeModule(ModuleAnalyzer& analyzer)
50{
51 analyzer.moduleRecord()->appendRequestedModule(m_moduleName->moduleName());
52 for (auto* specifier : m_specifierList->specifiers()) {
53 analyzer.moduleRecord()->addImportEntry(JSModuleRecord::ImportEntry {
54 specifier->importedName() == analyzer.vm().propertyNames->timesIdentifier
55 ? JSModuleRecord::ImportEntryType::Namespace : JSModuleRecord::ImportEntryType::Single,
56 m_moduleName->moduleName(),
57 specifier->importedName(),
58 specifier->localName(),
59 });
60 }
61}
62
63void ExportAllDeclarationNode::analyzeModule(ModuleAnalyzer& analyzer)
64{
65 analyzer.moduleRecord()->appendRequestedModule(m_moduleName->moduleName());
66 analyzer.moduleRecord()->addStarExportEntry(m_moduleName->moduleName());
67}
68
69void ExportDefaultDeclarationNode::analyzeModule(ModuleAnalyzer&)
70{
71}
72
73void ExportLocalDeclarationNode::analyzeModule(ModuleAnalyzer&)
74{
75}
76
77void ExportNamedDeclarationNode::analyzeModule(ModuleAnalyzer& analyzer)
78{
79 if (m_moduleName)
80 analyzer.moduleRecord()->appendRequestedModule(m_moduleName->moduleName());
81
82 for (auto* specifier : m_specifierList->specifiers()) {
83 if (m_moduleName) {
84 // export { v } from "mod"
85 //
86 // In this case, no local variable names are imported into the current module.
87 // "v" indirectly points the binding in "mod".
88 //
89 // export * as v from "mod"
90 //
91 // If it is namespace export, we should use createNamespace.
92 if (specifier->localName() == analyzer.vm().propertyNames->starNamespacePrivateName)
93 analyzer.moduleRecord()->addExportEntry(JSModuleRecord::ExportEntry::createNamespace(specifier->exportedName(), m_moduleName->moduleName()));
94 else
95 analyzer.moduleRecord()->addExportEntry(JSModuleRecord::ExportEntry::createIndirect(specifier->exportedName(), specifier->localName(), m_moduleName->moduleName()));
96 }
97 }
98}
99
100} // namespace JSC
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