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Copy pathNodes.cpp
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343 lines (296 loc) · 15.1 KB
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/*
* Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003-2009, 2013, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
* Copyright (C) 2007 Maks Orlovich
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "Nodes.h"
#include "NodeConstructors.h"
#include "ExecutableInfo.h"
#include "IdentifierInlines.h"
#include "JSCJSValueInlines.h"
#include "ModuleScopeData.h"
#include <wtf/Assertions.h>
namespace JSC {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(ParserArenaRoot);
// ------------------------------ SourceElements --------------------------------
void SourceElements::append(StatementNode* statement)
{
if (statement->isEmptyStatement())
return;
if (!m_head) {
m_head = statement;
m_tail = statement;
return;
}
m_tail->setNext(statement);
m_tail = statement;
}
StatementNode* SourceElements::singleStatement() const
{
return m_head == m_tail ? m_head : nullptr;
}
StatementNode* SourceElements::lastStatement() const
{
return m_tail;
}
bool SourceElements::hasCompletionValue() const
{
for (StatementNode* statement = m_head; statement; statement = statement->next()) {
if (statement->hasCompletionValue())
return true;
}
return false;
}
bool SourceElements::hasEarlyBreakOrContinue() const
{
for (StatementNode* statement = m_head; statement; statement = statement->next()) {
if (statement->hasEarlyBreakOrContinue())
return true;
if (statement->hasCompletionValue())
return false;
}
return false;
}
// ------------------------------ BlockNode ------------------------------------
StatementNode* BlockNode::lastStatement() const
{
return m_statements ? m_statements->lastStatement() : nullptr;
}
StatementNode* BlockNode::singleStatement() const
{
return m_statements ? m_statements->singleStatement() : nullptr;
}
bool BlockNode::hasCompletionValue() const
{
return m_statements && m_statements->hasCompletionValue();
}
bool BlockNode::hasEarlyBreakOrContinue() const
{
return m_statements && m_statements->hasEarlyBreakOrContinue();
}
// ------------------------------ ScopeNode -----------------------------
ScopeNode::ScopeNode(ParserArena& parserArena, const JSTokenLocation& startLocation, const JSTokenLocation& endLocation, LexicallyScopedFeatures lexicallyScopedFeatures)
: StatementNode(endLocation)
, ParserArenaRoot(parserArena)
, m_startStartOffset(startLocation.startOffset)
, m_features(NoFeatures)
, m_lexicallyScopedFeatures(lexicallyScopedFeatures)
, m_innerArrowFunctionCodeFeatures(NoInnerArrowFunctionFeatures)
, m_statements(nullptr)
{
}
ScopeNode::ScopeNode(ParserArena& parserArena, const JSTokenLocation& startLocation, const JSTokenLocation& endLocation, const SourceCode& source, SourceElements* children, VariableEnvironment&& varEnvironment, FunctionStack&& funcStack, VariableEnvironment&& lexicalVariables, CodeFeatures features, LexicallyScopedFeatures lexicallyScopedFeatures, InnerArrowFunctionCodeFeatures innerArrowFunctionCodeFeatures)
: StatementNode(endLocation)
, ParserArenaRoot(parserArena)
, VariableEnvironmentNode(WTF::move(lexicalVariables), WTF::move(funcStack))
, m_startStartOffset(startLocation.startOffset)
, m_features(features)
, m_lexicallyScopedFeatures(lexicallyScopedFeatures)
, m_innerArrowFunctionCodeFeatures(innerArrowFunctionCodeFeatures)
, m_source(source)
, m_varDeclarations(WTF::move(varEnvironment))
, m_statements(children)
{
}
StatementNode* ScopeNode::singleStatement() const
{
return m_statements ? m_statements->singleStatement() : nullptr;
}
bool ScopeNode::hasCompletionValue() const
{
return m_statements && m_statements->hasCompletionValue();
}
bool ScopeNode::hasEarlyBreakOrContinue() const
{
return m_statements && m_statements->hasEarlyBreakOrContinue();
}
// ------------------------------ ProgramNode -----------------------------
ProgramNode::ProgramNode(ParserArena& parserArena, const JSTokenLocation& startLocation, const JSTokenLocation& endLocation, SourceElements* children, VariableEnvironment&& varEnvironment, FunctionStack&& funcStack, VariableEnvironment&& lexicalVariables, FunctionParameters*, const SourceCode& source, CodeFeatures features, LexicallyScopedFeatures lexicallyScopedFeatures, InnerArrowFunctionCodeFeatures innerArrowFunctionCodeFeatures, RefPtr<ModuleScopeData>&&)
: ScopeNode(parserArena, startLocation, endLocation, source, children, WTF::move(varEnvironment), WTF::move(funcStack), WTF::move(lexicalVariables), features, lexicallyScopedFeatures, innerArrowFunctionCodeFeatures)
{
}
// ------------------------------ ModuleProgramNode -----------------------------
ModuleProgramNode::ModuleProgramNode(ParserArena& parserArena, const JSTokenLocation& startLocation, const JSTokenLocation& endLocation, SourceElements* children, VariableEnvironment&& varEnvironment, FunctionStack&& funcStack, VariableEnvironment&& lexicalVariables, FunctionParameters*, const SourceCode& source, CodeFeatures features, LexicallyScopedFeatures lexicallyScopedFeatures, InnerArrowFunctionCodeFeatures innerArrowFunctionCodeFeatures, RefPtr<ModuleScopeData>&& moduleScopeData)
: ScopeNode(parserArena, startLocation, endLocation, source, children, WTF::move(varEnvironment), WTF::move(funcStack), WTF::move(lexicalVariables), features, lexicallyScopedFeatures, innerArrowFunctionCodeFeatures)
, m_usesAwait(features & AwaitFeature)
, m_moduleScopeData(*WTF::move(moduleScopeData))
{
}
// ------------------------------ EvalNode -----------------------------
EvalNode::EvalNode(ParserArena& parserArena, const JSTokenLocation& startLocation, const JSTokenLocation& endLocation, SourceElements* children, VariableEnvironment&& varEnvironment, FunctionStack&& funcStack, VariableEnvironment&& lexicalVariables, FunctionParameters*, const SourceCode& source, CodeFeatures features, LexicallyScopedFeatures lexicallyScopedFeatures, InnerArrowFunctionCodeFeatures innerArrowFunctionCodeFeatures, RefPtr<ModuleScopeData>&&)
: ScopeNode(parserArena, startLocation, endLocation, source, children, WTF::move(varEnvironment), WTF::move(funcStack), WTF::move(lexicalVariables), features, lexicallyScopedFeatures, innerArrowFunctionCodeFeatures)
{
}
// ------------------------------ FunctionMetadataNode -----------------------------
FunctionMetadataNode::FunctionMetadataNode(
ParserArena&, const JSTokenLocation& startLocation,
const JSTokenLocation& endLocation, unsigned functionStart,
int functionNameStart, int parametersStart, ImplementationVisibility implementationVisibility, LexicallyScopedFeatures lexicallyScopedFeatures,
ConstructorKind constructorKind, SuperBinding superBinding, unsigned parameterCount, SourceParseMode mode, bool isArrowFunctionBodyExpression)
: Node(endLocation)
, m_implementationVisibility(static_cast<unsigned>(implementationVisibility))
, m_lexicallyScopedFeatures(lexicallyScopedFeatures)
, m_superBinding(static_cast<unsigned>(superBinding))
, m_constructorKind(static_cast<unsigned>(constructorKind))
, m_needsClassFieldInitializer(static_cast<unsigned>(NeedsClassFieldInitializer::No))
, m_isArrowFunctionBodyExpression(isArrowFunctionBodyExpression)
, m_privateBrandRequirement(static_cast<unsigned>(PrivateBrandRequirement::None))
, m_parseMode(mode)
, m_functionStart(functionStart)
, m_functionNameStart(functionNameStart)
, m_parametersStart(parametersStart)
, m_startStartOffset(startLocation.startOffset)
, m_parameterCount(parameterCount)
{
ASSERT(m_implementationVisibility == static_cast<unsigned>(implementationVisibility));
ASSERT(m_superBinding == static_cast<unsigned>(superBinding));
ASSERT(m_constructorKind == static_cast<unsigned>(constructorKind));
}
FunctionMetadataNode::FunctionMetadataNode(
const JSTokenLocation& startLocation,
const JSTokenLocation& endLocation, unsigned functionStart,
int functionNameStart, int parametersStart, ImplementationVisibility implementationVisibility, LexicallyScopedFeatures lexicallyScopedFeatures,
ConstructorKind constructorKind, SuperBinding superBinding, unsigned parameterCount, SourceParseMode mode, bool isArrowFunctionBodyExpression)
: Node(endLocation)
, m_implementationVisibility(static_cast<unsigned>(implementationVisibility))
, m_lexicallyScopedFeatures(lexicallyScopedFeatures)
, m_superBinding(static_cast<unsigned>(superBinding))
, m_constructorKind(static_cast<unsigned>(constructorKind))
, m_needsClassFieldInitializer(static_cast<unsigned>(NeedsClassFieldInitializer::No))
, m_isArrowFunctionBodyExpression(isArrowFunctionBodyExpression)
, m_privateBrandRequirement(static_cast<unsigned>(PrivateBrandRequirement::None))
, m_parseMode(mode)
, m_functionStart(functionStart)
, m_functionNameStart(functionNameStart)
, m_parametersStart(parametersStart)
, m_startStartOffset(startLocation.startOffset)
, m_parameterCount(parameterCount)
{
ASSERT(m_implementationVisibility == static_cast<unsigned>(implementationVisibility));
ASSERT(m_superBinding == static_cast<unsigned>(superBinding));
ASSERT(m_constructorKind == static_cast<unsigned>(constructorKind));
}
void FunctionMetadataNode::finishParsing(const SourceCode& source, const Identifier& ident, FunctionMode functionMode)
{
m_source = source;
m_ident = ident;
m_functionMode = functionMode;
}
bool FunctionMetadataNode::operator==(const FunctionMetadataNode& other) const
{
return m_parseMode == other.m_parseMode
&& m_implementationVisibility == other.m_implementationVisibility
&& m_lexicallyScopedFeatures == other.m_lexicallyScopedFeatures
&& m_superBinding == other.m_superBinding
&& m_constructorKind == other.m_constructorKind
&& m_isArrowFunctionBodyExpression == other.m_isArrowFunctionBodyExpression
&& m_isSloppyModeHoistedFunction == other.m_isSloppyModeHoistedFunction
&& m_ident == other.m_ident
&& m_ecmaName == other.m_ecmaName
&& m_functionMode == other.m_functionMode
&& m_functionStart == other.m_functionStart
&& m_functionNameStart == other.m_functionNameStart
&& m_parametersStart == other.m_parametersStart
&& m_source == other.m_source
&& m_classSource == other.m_classSource
&& m_startStartOffset == other.m_startStartOffset
&& m_parameterCount == other.m_parameterCount
&& m_position == other.m_position;
}
void FunctionMetadataNode::dump(PrintStream& stream) const
{
stream.println("m_parseMode ", static_cast<uint32_t>(m_parseMode));
stream.println("m_implementationVisibility ", m_implementationVisibility);
stream.println("m_lexicallyScopedFeatures ", m_lexicallyScopedFeatures);
stream.println("m_superBinding ", m_superBinding);
stream.println("m_constructorKind ", m_constructorKind);
stream.println("m_isArrowFunctionBodyExpression ", m_isArrowFunctionBodyExpression);
stream.println("m_isSloppyModeHoistedFunction ", m_isSloppyModeHoistedFunction);
stream.println("m_ident ", m_ident);
stream.println("m_ecmaName ", m_ecmaName);
stream.println("m_functionMode ", static_cast<uint32_t>(m_functionMode));
stream.println("m_functionStart ", m_functionStart);
stream.println("m_functionNameStart ", m_functionNameStart);
stream.println("m_parametersStart ", m_parametersStart);
stream.println("m_classSource.isNull() ", m_classSource.isNull());
stream.println("m_startStartOffset ", m_startStartOffset);
stream.println("m_parameterCount ", m_parameterCount);
stream.println("position().offset ", position().offset);
}
// ------------------------------ FunctionNode -----------------------------
FunctionNode::FunctionNode(ParserArena& parserArena, const JSTokenLocation& startLocation, const JSTokenLocation& endLocation, SourceElements* children, VariableEnvironment&& varEnvironment, FunctionStack&& funcStack, VariableEnvironment&& lexicalVariables, FunctionParameters* parameters, const SourceCode& sourceCode, CodeFeatures features, LexicallyScopedFeatures lexicallyScopedFeatures, InnerArrowFunctionCodeFeatures innerArrowFunctionCodeFeatures, RefPtr<ModuleScopeData>&&)
: ScopeNode(parserArena, startLocation, endLocation, sourceCode, children, WTF::move(varEnvironment), WTF::move(funcStack), WTF::move(lexicalVariables), features, lexicallyScopedFeatures, innerArrowFunctionCodeFeatures)
, m_parameters(parameters)
{
}
void FunctionNode::finishParsing(const Identifier& ident, FunctionMode functionMode)
{
ASSERT(!source().isNull());
m_ident = ident;
m_functionMode = functionMode;
}
bool PropertyListNode::hasStaticallyNamedProperty(const Identifier& propName)
{
PropertyListNode* list = this;
while (list) {
if (list->m_node->isStaticClassProperty()) {
const Identifier* currentNodeName = list->m_node->name();
if (currentNodeName && *currentNodeName == propName)
return true;
}
list = list->m_next;
}
return false;
}
// FIXME: calculate this feature once when parsing the property list.
// https://bugs.webkit.org/show_bug.cgi?id=206174
bool PropertyListNode::shouldCreateLexicalScopeForClass(PropertyListNode* list)
{
while (list) {
if (list->m_node->isComputedClassField() || list->m_node->isPrivate())
return true;
list = list->m_next;
}
return false;
}
// ------------------------------ ClassExprNode -----------------------------
// FIXME: calculate this feature once when parsing the property list.
// https://bugs.webkit.org/show_bug.cgi?id=206174
bool PropertyListNode::hasInstanceFields() const
{
for (auto list = this; list; list = list->m_next) {
if (list->m_node->isInstanceClassField())
return true;
}
return false;
}
VariableEnvironmentNode::VariableEnvironmentNode(VariableEnvironment&& lexicalVariables)
: m_lexicalVariables(WTF::move(lexicalVariables))
{
}
VariableEnvironmentNode::VariableEnvironmentNode(VariableEnvironment&& lexicalVariables, FunctionStack&& functionStack)
: m_lexicalVariables(WTF::move(lexicalVariables))
, m_functionStack(WTF::move(functionStack))
{
}
} // namespace JSC