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webkit / WebKit / 4cc720436197cbbb8e4c48226df34e98d98509ab / . / Source / JavaScriptCore / parser / Nodes.h
blob: fad5328a2b94437db2dae7f1c86b289c1a341fab [file] [log] [blame]
/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003-2019 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.
*
*/
#pragma once
#include "BytecodeIntrinsicRegistry.h"
#include "JITCode.h"
#include "Label.h"
#include "ParserArena.h"
#include "ParserModes.h"
#include "ParserTokens.h"
#include "ResultType.h"
#include "SourceCode.h"
#include "SymbolTable.h"
#include "VariableEnvironment.h"
#include <wtf/MathExtras.h>
#include <wtf/SmallPtrSet.h>
namespace JSC {
enum OpcodeID : unsigned;
class ArgumentListNode;
class BytecodeGenerator;
class FunctionMetadataNode;
class FunctionParameters;
class ModuleAnalyzer;
class ModuleScopeData;
class PropertyListNode;
class ReadModifyResolveNode;
class RegisterID;
class ScopeNode;
typedef SmallPtrSet<UniquedStringImpl*> UniquedStringImplPtrSet;
enum Operator : uint8_t {
OpEqual,
OpPlusEq,
OpMinusEq,
OpMultEq,
OpDivEq,
OpPlusPlus,
OpMinusMinus,
OpAndEq,
OpXOrEq,
OpOrEq,
OpModEq,
OpPowEq,
OpLShift,
OpRShift,
OpURShift
};
enum LogicalOperator : uint8_t {
OpLogicalAnd,
OpLogicalOr
};
enum FallThroughMode : uint8_t {
FallThroughMeansTrue = 0,
FallThroughMeansFalse = 1
};
inline FallThroughMode invert(FallThroughMode fallThroughMode) { return static_cast<FallThroughMode>(!fallThroughMode); }
namespace DeclarationStacks {
typedef Vector<FunctionMetadataNode*> FunctionStack;
}
struct SwitchInfo {
enum SwitchType : uint8_t { SwitchNone, SwitchImmediate, SwitchCharacter, SwitchString };
uint32_t bytecodeOffset;
SwitchType switchType;
};
enum class AssignmentContext : uint8_t {
DeclarationStatement,
ConstDeclarationStatement,
AssignmentExpression
};
class ParserArenaFreeable {
public:
// ParserArenaFreeable objects are freed when the arena is deleted.
// Destructors are not called. Clients must not call delete on such objects.
void* operator new(size_t, ParserArena&);
};
class ParserArenaDeletable {
public:
virtual ~ParserArenaDeletable() { }
// ParserArenaDeletable objects are deleted when the arena is deleted.
// Clients must not call delete directly on such objects.
template<typename T> void* operator new(size_t, ParserArena&);
};
#define JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED_IMPL(__classToNew) \
void* operator new(size_t size, ParserArena& parserArena) \
{ \
return ParserArenaDeletable::operator new<__classToNew>(size, parserArena); \
}
#define JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(__classToNew) \
public: \
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED_IMPL(__classToNew) \
private: \
typedef int __thisIsHereToForceASemicolonAfterThisMacro
class ParserArenaRoot {
WTF_MAKE_FAST_ALLOCATED;
protected:
ParserArenaRoot(ParserArena&);
public:
ParserArena& parserArena() { return m_arena; }
virtual ~ParserArenaRoot() { }
protected:
ParserArena m_arena;
};
class Node : public ParserArenaFreeable {
protected:
Node(const JSTokenLocation&);
public:
virtual ~Node() { }
int firstLine() const { return m_position.line; }
int startOffset() const { return m_position.offset; }
int endOffset() const { return m_endOffset; }
int lineStartOffset() const { return m_position.lineStartOffset; }
const JSTextPosition& position() const { return m_position; }
void setEndOffset(int offset) { m_endOffset = offset; }
void setStartOffset(int offset) { m_position.offset = offset; }
bool needsDebugHook() const { return m_needsDebugHook; }
void setNeedsDebugHook() { m_needsDebugHook = true; }
protected:
JSTextPosition m_position;
int m_endOffset { -1 };
bool m_needsDebugHook { false };
};
class ExpressionNode : public Node {
protected:
ExpressionNode(const JSTokenLocation&, ResultType = ResultType::unknownType());
public:
virtual RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* destination = 0) = 0;
virtual bool isNumber() const { return false; }
virtual bool isString() const { return false; }
virtual bool isBigInt() const { return false; }
virtual bool isObjectLiteral() const { return false; }
virtual bool isArrayLiteral() const { return false; }
virtual bool isNull() const { return false; }
virtual bool isPure(BytecodeGenerator&) const { return false; }
virtual bool isConstant() const { return false; }
virtual bool isLocation() const { return false; }
virtual bool isAssignmentLocation() const { return isLocation(); }
virtual bool isResolveNode() const { return false; }
virtual bool isAssignResolveNode() const { return false; }
virtual bool isBracketAccessorNode() const { return false; }
virtual bool isDotAccessorNode() const { return false; }
virtual bool isDestructuringNode() const { return false; }
virtual bool isBaseFuncExprNode() const { return false; }
virtual bool isFuncExprNode() const { return false; }
virtual bool isArrowFuncExprNode() const { return false; }
virtual bool isClassExprNode() const { return false; }
virtual bool isCommaNode() const { return false; }
virtual bool isSimpleArray() const { return false; }
virtual bool isAdd() const { return false; }
virtual bool isSubtract() const { return false; }
virtual bool isBoolean() const { return false; }
virtual bool isSpreadExpression() const { return false; }
virtual bool isSuperNode() const { return false; }
virtual bool isImportNode() const { return false; }
virtual bool isMetaProperty() const { return false; }
virtual bool isNewTarget() const { return false; }
virtual bool isImportMeta() const { return false; }
virtual bool isBytecodeIntrinsicNode() const { return false; }
virtual bool isBinaryOpNode() const { return false; }
virtual bool isFunctionCall() const { return false; }
virtual bool isDeleteNode() const { return false; }
virtual bool isOptionalChain() const { return false; }
virtual void emitBytecodeInConditionContext(BytecodeGenerator&, Label&, Label&, FallThroughMode);
virtual ExpressionNode* stripUnaryPlus() { return this; }
ResultType resultDescriptor() const { return m_resultType; }
bool isOptionalChainBase() const { return m_isOptionalChainBase; }
void setIsOptionalChainBase() { m_isOptionalChainBase = true; }
private:
ResultType m_resultType;
bool m_isOptionalChainBase { false };
};
class StatementNode : public Node {
protected:
StatementNode(const JSTokenLocation&);
public:
virtual void emitBytecode(BytecodeGenerator&, RegisterID* destination = 0) = 0;
void setLoc(unsigned firstLine, unsigned lastLine, int startOffset, int lineStartOffset);
unsigned lastLine() const { return m_lastLine; }
StatementNode* next() const { return m_next; }
void setNext(StatementNode* next) { m_next = next; }
virtual bool hasCompletionValue() const { return true; }
virtual bool hasEarlyBreakOrContinue() const { return false; }
virtual bool isEmptyStatement() const { return false; }
virtual bool isDebuggerStatement() const { return false; }
virtual bool isFunctionNode() const { return false; }
virtual bool isReturnNode() const { return false; }
virtual bool isExprStatement() const { return false; }
virtual bool isBreak() const { return false; }
virtual bool isContinue() const { return false; }
virtual bool isLabel() const { return false; }
virtual bool isBlock() const { return false; }
virtual bool isFuncDeclNode() const { return false; }
virtual bool isModuleDeclarationNode() const { return false; }
virtual bool isForOfNode() const { return false; }
protected:
int m_lastLine { -1 };
StatementNode* m_next { nullptr };
};
class VariableEnvironmentNode : public ParserArenaDeletable {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(VariableEnvironmentNode);
public:
typedef DeclarationStacks::FunctionStack FunctionStack;
VariableEnvironmentNode()
{
}
VariableEnvironmentNode(VariableEnvironment& lexicalDeclaredVariables);
VariableEnvironmentNode(VariableEnvironment& lexicalDeclaredVariables, FunctionStack&&);
VariableEnvironment& lexicalVariables() { return m_lexicalVariables; }
FunctionStack& functionStack() { return m_functionStack; }
protected:
VariableEnvironment m_lexicalVariables;
FunctionStack m_functionStack;
};
class ConstantNode : public ExpressionNode {
public:
ConstantNode(const JSTokenLocation&, ResultType);
bool isPure(BytecodeGenerator&) const override { return true; }
bool isConstant() const override { return true; }
virtual JSValue jsValue(BytecodeGenerator&) const = 0;
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void emitBytecodeInConditionContext(BytecodeGenerator&, Label& trueTarget, Label& falseTarget, FallThroughMode) override;
};
class NullNode final : public ConstantNode {
public:
NullNode(const JSTokenLocation&);
private:
bool isNull() const override { return true; }
JSValue jsValue(BytecodeGenerator&) const override { return jsNull(); }
};
class BooleanNode final : public ConstantNode {
public:
BooleanNode(const JSTokenLocation&, bool value);
bool value() { return m_value; }
private:
bool isBoolean() const override { return true; }
JSValue jsValue(BytecodeGenerator&) const override { return jsBoolean(m_value); }
bool m_value;
};
class NumberNode : public ConstantNode {
public:
NumberNode(const JSTokenLocation&, double value);
double value() const { return m_value; }
virtual bool isIntegerNode() const = 0;
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) final;
private:
bool isNumber() const final { return true; }
JSValue jsValue(BytecodeGenerator&) const override { return jsNumber(m_value); }
double m_value;
};
class DoubleNode : public NumberNode {
public:
DoubleNode(const JSTokenLocation&, double value);
private:
bool isIntegerNode() const override { return false; }
};
// An integer node represent a number represented as an integer (e.g. 42 instead of 42., 42.0, 42e0)
class IntegerNode final : public DoubleNode {
public:
IntegerNode(const JSTokenLocation&, double value);
bool isIntegerNode() const final { return true; }
};
class StringNode final : public ConstantNode {
public:
StringNode(const JSTokenLocation&, const Identifier&);
const Identifier& value() { return m_value; }
private:
bool isString() const override { return true; }
JSValue jsValue(BytecodeGenerator&) const override;
const Identifier& m_value;
};
class BigIntNode final : public ConstantNode {
public:
BigIntNode(const JSTokenLocation&, const Identifier&, uint8_t radix);
BigIntNode(const JSTokenLocation&, const Identifier&, uint8_t radix, bool sign);
const Identifier& value() { return m_value; }
const Identifier& identifier() const { return m_value; }
uint8_t radix() const { return m_radix; }
bool sign() const { return m_sign; }
private:
bool isBigInt() const final { return true; }
JSValue jsValue(BytecodeGenerator&) const final;
const Identifier& m_value;
const uint8_t m_radix;
const bool m_sign;
};
class ThrowableExpressionData {
public:
ThrowableExpressionData()
: m_divot(-1, -1, -1)
, m_divotStart(-1, -1, -1)
, m_divotEnd(-1, -1, -1)
{
}
ThrowableExpressionData(const JSTextPosition& divot, const JSTextPosition& start, const JSTextPosition& end)
: m_divot(divot)
, m_divotStart(start)
, m_divotEnd(end)
{
ASSERT(m_divot.offset >= m_divot.lineStartOffset);
ASSERT(m_divotStart.offset >= m_divotStart.lineStartOffset);
ASSERT(m_divotEnd.offset >= m_divotEnd.lineStartOffset);
}
void setExceptionSourceCode(const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd)
{
ASSERT(divot.offset >= divot.lineStartOffset);
ASSERT(divotStart.offset >= divotStart.lineStartOffset);
ASSERT(divotEnd.offset >= divotEnd.lineStartOffset);
m_divot = divot;
m_divotStart = divotStart;
m_divotEnd = divotEnd;
}
const JSTextPosition& divot() const { return m_divot; }
const JSTextPosition& divotStart() const { return m_divotStart; }
const JSTextPosition& divotEnd() const { return m_divotEnd; }
protected:
RegisterID* emitThrowReferenceError(BytecodeGenerator&, const String& message);
private:
JSTextPosition m_divot;
JSTextPosition m_divotStart;
JSTextPosition m_divotEnd;
};
class ThrowableSubExpressionData : public ThrowableExpressionData {
public:
ThrowableSubExpressionData()
: m_subexpressionDivotOffset(0)
, m_subexpressionEndOffset(0)
, m_subexpressionLineOffset(0)
, m_subexpressionLineStartOffset(0)
{
}
ThrowableSubExpressionData(const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd)
: ThrowableExpressionData(divot, divotStart, divotEnd)
, m_subexpressionDivotOffset(0)
, m_subexpressionEndOffset(0)
, m_subexpressionLineOffset(0)
, m_subexpressionLineStartOffset(0)
{
}
void setSubexpressionInfo(const JSTextPosition& subexpressionDivot, int subexpressionOffset)
{
ASSERT(subexpressionDivot.offset <= divot().offset);
// Overflow means we can't do this safely, so just point at the primary divot,
// divotLine, or divotLineStart.
if ((divot() - subexpressionDivot.offset) & ~0xFFFF)
return;
if ((divot().line - subexpressionDivot.line) & ~0xFFFF)
return;
if ((divot().lineStartOffset - subexpressionDivot.lineStartOffset) & ~0xFFFF)
return;
if ((divotEnd() - subexpressionOffset) & ~0xFFFF)
return;
m_subexpressionDivotOffset = divot() - subexpressionDivot.offset;
m_subexpressionEndOffset = divotEnd() - subexpressionOffset;
m_subexpressionLineOffset = divot().line - subexpressionDivot.line;
m_subexpressionLineStartOffset = divot().lineStartOffset - subexpressionDivot.lineStartOffset;
}
JSTextPosition subexpressionDivot()
{
int newLine = divot().line - m_subexpressionLineOffset;
int newOffset = divot().offset - m_subexpressionDivotOffset;
int newLineStartOffset = divot().lineStartOffset - m_subexpressionLineStartOffset;
return JSTextPosition(newLine, newOffset, newLineStartOffset);
}
JSTextPosition subexpressionStart() { return divotStart(); }
JSTextPosition subexpressionEnd() { return divotEnd() - static_cast<int>(m_subexpressionEndOffset); }
protected:
uint16_t m_subexpressionDivotOffset;
uint16_t m_subexpressionEndOffset;
uint16_t m_subexpressionLineOffset;
uint16_t m_subexpressionLineStartOffset;
};
class ThrowablePrefixedSubExpressionData : public ThrowableExpressionData {
public:
ThrowablePrefixedSubExpressionData()
: m_subexpressionDivotOffset(0)
, m_subexpressionStartOffset(0)
, m_subexpressionLineOffset(0)
, m_subexpressionLineStartOffset(0)
{
}
ThrowablePrefixedSubExpressionData(const JSTextPosition& divot, const JSTextPosition& start, const JSTextPosition& end)
: ThrowableExpressionData(divot, start, end)
, m_subexpressionDivotOffset(0)
, m_subexpressionStartOffset(0)
, m_subexpressionLineOffset(0)
, m_subexpressionLineStartOffset(0)
{
}
void setSubexpressionInfo(const JSTextPosition& subexpressionDivot, int subexpressionOffset)
{
ASSERT(subexpressionDivot.offset >= divot().offset);
// Overflow means we can't do this safely, so just point at the primary divot,
// divotLine, or divotLineStart.
if ((subexpressionDivot.offset - divot()) & ~0xFFFF)
return;
if ((subexpressionDivot.line - divot().line) & ~0xFFFF)
return;
if ((subexpressionDivot.lineStartOffset - divot().lineStartOffset) & ~0xFFFF)
return;
if ((subexpressionOffset - divotStart()) & ~0xFFFF)
return;
m_subexpressionDivotOffset = subexpressionDivot.offset - divot();
m_subexpressionStartOffset = subexpressionOffset - divotStart();
m_subexpressionLineOffset = subexpressionDivot.line - divot().line;
m_subexpressionLineStartOffset = subexpressionDivot.lineStartOffset - divot().lineStartOffset;
}
JSTextPosition subexpressionDivot()
{
int newLine = divot().line + m_subexpressionLineOffset;
int newOffset = divot().offset + m_subexpressionDivotOffset;
int newLineStartOffset = divot().lineStartOffset + m_subexpressionLineStartOffset;
return JSTextPosition(newLine, newOffset, newLineStartOffset);
}
JSTextPosition subexpressionStart() { return divotStart() + static_cast<int>(m_subexpressionStartOffset); }
JSTextPosition subexpressionEnd() { return divotEnd(); }
protected:
uint16_t m_subexpressionDivotOffset;
uint16_t m_subexpressionStartOffset;
uint16_t m_subexpressionLineOffset;
uint16_t m_subexpressionLineStartOffset;
};
class TemplateExpressionListNode final : public ParserArenaFreeable {
public:
TemplateExpressionListNode(ExpressionNode*);
TemplateExpressionListNode(TemplateExpressionListNode*, ExpressionNode*);
ExpressionNode* value() { return m_node; }
TemplateExpressionListNode* next() { return m_next; }
private:
TemplateExpressionListNode* m_next { nullptr };
ExpressionNode* m_node { nullptr };
};
class TemplateStringNode final : public ExpressionNode {
public:
TemplateStringNode(const JSTokenLocation&, const Identifier* cooked, const Identifier* raw);
const Identifier* cooked() { return m_cooked; }
const Identifier* raw() { return m_raw; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier* m_cooked;
const Identifier* m_raw;
};
class TemplateStringListNode final : public ParserArenaFreeable {
public:
TemplateStringListNode(TemplateStringNode*);
TemplateStringListNode(TemplateStringListNode*, TemplateStringNode*);
TemplateStringNode* value() { return m_node; }
TemplateStringListNode* next() { return m_next; }
private:
TemplateStringListNode* m_next { nullptr };
TemplateStringNode* m_node { nullptr };
};
class TemplateLiteralNode final : public ExpressionNode {
public:
TemplateLiteralNode(const JSTokenLocation&, TemplateStringListNode*);
TemplateLiteralNode(const JSTokenLocation&, TemplateStringListNode*, TemplateExpressionListNode*);
TemplateStringListNode* templateStrings() const { return m_templateStrings; }
TemplateExpressionListNode* templateExpressions() const { return m_templateExpressions; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
TemplateStringListNode* m_templateStrings;
TemplateExpressionListNode* m_templateExpressions;
};
class TaggedTemplateNode final : public ExpressionNode, public ThrowableExpressionData {
public:
TaggedTemplateNode(const JSTokenLocation&, ExpressionNode*, TemplateLiteralNode*);
TemplateLiteralNode* templateLiteral() const { return m_templateLiteral; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_tag;
TemplateLiteralNode* m_templateLiteral;
};
class RegExpNode final : public ExpressionNode, public ThrowableExpressionData {
public:
RegExpNode(const JSTokenLocation&, const Identifier& pattern, const Identifier& flags);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_pattern;
const Identifier& m_flags;
};
class ThisNode final : public ExpressionNode {
public:
ThisNode(const JSTokenLocation&);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class SuperNode final : public ExpressionNode {
public:
SuperNode(const JSTokenLocation&);
private:
bool isSuperNode() const override { return true; }
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class ImportNode final : public ExpressionNode, public ThrowableExpressionData {
public:
ImportNode(const JSTokenLocation&, ExpressionNode*);
private:
bool isImportNode() const override { return true; }
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
};
class MetaPropertyNode : public ExpressionNode {
public:
MetaPropertyNode(const JSTokenLocation&);
private:
bool isMetaProperty() const final { return true; }
};
class NewTargetNode final : public MetaPropertyNode {
public:
NewTargetNode(const JSTokenLocation&);
private:
bool isNewTarget() const final { return true; }
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class ImportMetaNode final : public MetaPropertyNode {
public:
ImportMetaNode(const JSTokenLocation&, ExpressionNode*);
private:
bool isImportMeta() const final { return true; }
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
};
class ResolveNode final : public ExpressionNode {
public:
ResolveNode(const JSTokenLocation&, const Identifier&, const JSTextPosition& start);
const Identifier& identifier() const { return m_ident; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isPure(BytecodeGenerator&) const override;
bool isLocation() const override { return true; }
bool isResolveNode() const override { return true; }
const Identifier& m_ident;
JSTextPosition m_start;
};
class ElementNode final : public ParserArenaFreeable {
public:
ElementNode(int elision, ExpressionNode*);
ElementNode(ElementNode*, int elision, ExpressionNode*);
int elision() const { return m_elision; }
ExpressionNode* value() { return m_node; }
ElementNode* next() { return m_next; }
private:
ElementNode* m_next { nullptr };
ExpressionNode* m_node;
int m_elision;
};
class ArrayNode final : public ExpressionNode {
public:
ArrayNode(const JSTokenLocation&, int elision);
ArrayNode(const JSTokenLocation&, ElementNode*);
ArrayNode(const JSTokenLocation&, int elision, ElementNode*);
bool isArrayLiteral() const override { return true; }
ArgumentListNode* toArgumentList(ParserArena&, int, int) const;
ElementNode* elements() const { return m_element; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isSimpleArray() const override;
ElementNode* m_element;
int m_elision;
bool m_optional;
};
enum class ClassElementTag : uint8_t { No, Instance, Static, LastTag };
class PropertyNode final : public ParserArenaFreeable {
public:
enum Type : uint8_t { Constant = 1, Getter = 2, Setter = 4, Computed = 8, Shorthand = 16, Spread = 32 };
enum PutType : uint8_t { Unknown, KnownDirect };
PropertyNode(const Identifier&, ExpressionNode*, Type, PutType, SuperBinding, ClassElementTag);
PropertyNode(ExpressionNode*, Type, PutType, SuperBinding, ClassElementTag);
PropertyNode(ExpressionNode* propertyName, ExpressionNode*, Type, PutType, SuperBinding, ClassElementTag);
ExpressionNode* expressionName() const { return m_expression; }
const Identifier* name() const { return m_name; }
Type type() const { return static_cast<Type>(m_type); }
bool needsSuperBinding() const { return m_needsSuperBinding; }
bool isClassProperty() const { return static_cast<ClassElementTag>(m_classElementTag) != ClassElementTag::No; }
bool isStaticClassProperty() const { return static_cast<ClassElementTag>(m_classElementTag) == ClassElementTag::Static; }
bool isInstanceClassProperty() const { return static_cast<ClassElementTag>(m_classElementTag) == ClassElementTag::Instance; }
bool isOverriddenByDuplicate() const { return m_isOverriddenByDuplicate; }
void setIsOverriddenByDuplicate() { m_isOverriddenByDuplicate = true; }
PutType putType() const { return static_cast<PutType>(m_putType); }
private:
friend class PropertyListNode;
const Identifier* m_name;
ExpressionNode* m_expression;
ExpressionNode* m_assign;
unsigned m_type : 6;
unsigned m_needsSuperBinding : 1;
unsigned m_putType : 1;
static_assert(1 << 2 > static_cast<unsigned>(ClassElementTag::LastTag), "ClassElementTag shouldn't use more than two bits");
unsigned m_classElementTag : 2;
unsigned m_isOverriddenByDuplicate: 1;
};
class PropertyListNode final : public ExpressionNode {
public:
PropertyListNode(const JSTokenLocation&, PropertyNode*);
PropertyListNode(const JSTokenLocation&, PropertyNode*, PropertyListNode*);
bool hasStaticallyNamedProperty(const Identifier& propName);
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID*, RegisterID*);
private:
RegisterID* emitBytecode(BytecodeGenerator& generator, RegisterID* dst = nullptr) override
{
return emitBytecode(generator, dst, nullptr);
}
void emitPutConstantProperty(BytecodeGenerator&, RegisterID*, PropertyNode&);
PropertyNode* m_node;
PropertyListNode* m_next { nullptr };
};
class ObjectLiteralNode final : public ExpressionNode {
public:
ObjectLiteralNode(const JSTokenLocation&);
ObjectLiteralNode(const JSTokenLocation&, PropertyListNode*);
bool isObjectLiteral() const override { return true; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
PropertyListNode* m_list;
};
class BracketAccessorNode final : public ExpressionNode, public ThrowableExpressionData {
public:
BracketAccessorNode(const JSTokenLocation&, ExpressionNode* base, ExpressionNode* subscript, bool subscriptHasAssignments);
ExpressionNode* base() const { return m_base; }
ExpressionNode* subscript() const { return m_subscript; }
bool subscriptHasAssignments() const { return m_subscriptHasAssignments; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isLocation() const override { return true; }
bool isBracketAccessorNode() const override { return true; }
ExpressionNode* m_base;
ExpressionNode* m_subscript;
bool m_subscriptHasAssignments;
};
class DotAccessorNode final : public ExpressionNode, public ThrowableExpressionData {
public:
DotAccessorNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&);
ExpressionNode* base() const { return m_base; }
const Identifier& identifier() const { return m_ident; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isLocation() const override { return true; }
bool isDotAccessorNode() const override { return true; }
ExpressionNode* m_base;
const Identifier& m_ident;
};
class SpreadExpressionNode final : public ExpressionNode, public ThrowableExpressionData {
public:
SpreadExpressionNode(const JSTokenLocation&, ExpressionNode*);
ExpressionNode* expression() const { return m_expression; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isSpreadExpression() const override { return true; }
ExpressionNode* m_expression;
};
class ObjectSpreadExpressionNode final : public ExpressionNode, public ThrowableExpressionData {
public:
ObjectSpreadExpressionNode(const JSTokenLocation&, ExpressionNode*);
ExpressionNode* expression() const { return m_expression; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expression;
};
class ArgumentListNode final : public ExpressionNode {
public:
ArgumentListNode(const JSTokenLocation&, ExpressionNode*);
ArgumentListNode(const JSTokenLocation&, ArgumentListNode*, ExpressionNode*);
ArgumentListNode* m_next { nullptr };
ExpressionNode* m_expr;
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class ArgumentsNode final : public ParserArenaFreeable {
public:
ArgumentsNode();
ArgumentsNode(ArgumentListNode*);
ArgumentListNode* m_listNode;
};
class NewExprNode final : public ExpressionNode, public ThrowableExpressionData {
public:
NewExprNode(const JSTokenLocation&, ExpressionNode*);
NewExprNode(const JSTokenLocation&, ExpressionNode*, ArgumentsNode*);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
ArgumentsNode* m_args;
};
class EvalFunctionCallNode final : public ExpressionNode, public ThrowableExpressionData {
public:
EvalFunctionCallNode(const JSTokenLocation&, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFunctionCall() const override { return true; }
ArgumentsNode* m_args;
};
class FunctionCallValueNode final : public ExpressionNode, public ThrowableExpressionData {
public:
FunctionCallValueNode(const JSTokenLocation&, ExpressionNode*, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFunctionCall() const override { return true; }
ExpressionNode* m_expr;
ArgumentsNode* m_args;
};
class FunctionCallResolveNode final : public ExpressionNode, public ThrowableExpressionData {
public:
FunctionCallResolveNode(const JSTokenLocation&, const Identifier&, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFunctionCall() const override { return true; }
const Identifier& m_ident;
ArgumentsNode* m_args;
};
class FunctionCallBracketNode final : public ExpressionNode, public ThrowableSubExpressionData {
public:
FunctionCallBracketNode(const JSTokenLocation&, ExpressionNode* base, ExpressionNode* subscript, bool subscriptHasAssignments, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFunctionCall() const override { return true; }
ExpressionNode* m_base;
ExpressionNode* m_subscript;
ArgumentsNode* m_args;
bool m_subscriptHasAssignments;
};
class FunctionCallDotNode : public ExpressionNode, public ThrowableSubExpressionData {
public:
FunctionCallDotNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
protected:
bool isFunctionCall() const override { return true; }
ExpressionNode* m_base;
const Identifier& m_ident;
ArgumentsNode* m_args;
};
class BytecodeIntrinsicNode final : public ExpressionNode, public ThrowableExpressionData {
public:
enum class Type : uint8_t {
Constant,
Function
};
BytecodeIntrinsicNode(Type, const JSTokenLocation&, BytecodeIntrinsicRegistry::Entry, const Identifier&, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
bool isBytecodeIntrinsicNode() const override { return true; }
Type type() const { return m_type; }
BytecodeIntrinsicRegistry::Entry entry() const { return m_entry; }
const Identifier& identifier() const { return m_ident; }
#define JSC_DECLARE_BYTECODE_INTRINSIC_FUNCTIONS(name) RegisterID* emit_intrinsic_##name(BytecodeGenerator&, RegisterID*);
JSC_COMMON_BYTECODE_INTRINSIC_FUNCTIONS_EACH_NAME(JSC_DECLARE_BYTECODE_INTRINSIC_FUNCTIONS)
JSC_COMMON_BYTECODE_INTRINSIC_CONSTANTS_EACH_NAME(JSC_DECLARE_BYTECODE_INTRINSIC_FUNCTIONS)
#undef JSC_DECLARE_BYTECODE_INTRINSIC_FUNCTIONS
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFunctionCall() const override { return m_type == Type::Function; }
BytecodeIntrinsicRegistry::Entry m_entry;
const Identifier& m_ident;
ArgumentsNode* m_args;
Type m_type;
};
class CallFunctionCallDotNode final : public FunctionCallDotNode {
public:
CallFunctionCallDotNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd, size_t distanceToInnermostCallOrApply);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
size_t m_distanceToInnermostCallOrApply;
};
class ApplyFunctionCallDotNode final : public FunctionCallDotNode {
public:
ApplyFunctionCallDotNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&, ArgumentsNode*, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd, size_t distanceToInnermostCallOrApply);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
size_t m_distanceToInnermostCallOrApply;
};
class DeleteResolveNode final : public ExpressionNode, public ThrowableExpressionData {
public:
DeleteResolveNode(const JSTokenLocation&, const Identifier&, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isDeleteNode() const final { return true; }
const Identifier& m_ident;
};
class DeleteBracketNode final : public ExpressionNode, public ThrowableExpressionData {
public:
DeleteBracketNode(const JSTokenLocation&, ExpressionNode* base, ExpressionNode* subscript, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isDeleteNode() const final { return true; }
ExpressionNode* m_base;
ExpressionNode* m_subscript;
};
class DeleteDotNode final : public ExpressionNode, public ThrowableExpressionData {
public:
DeleteDotNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isDeleteNode() const final { return true; }
ExpressionNode* m_base;
const Identifier& m_ident;
};
class DeleteValueNode final : public ExpressionNode {
public:
DeleteValueNode(const JSTokenLocation&, ExpressionNode*);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isDeleteNode() const final { return true; }
ExpressionNode* m_expr;
};
class VoidNode final : public ExpressionNode {
public:
VoidNode(const JSTokenLocation&, ExpressionNode*);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
};
class TypeOfResolveNode final : public ExpressionNode {
public:
TypeOfResolveNode(const JSTokenLocation&, const Identifier&);
const Identifier& identifier() const { return m_ident; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
};
class TypeOfValueNode final : public ExpressionNode {
public:
TypeOfValueNode(const JSTokenLocation&, ExpressionNode*);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
};
class PrefixNode : public ExpressionNode, public ThrowablePrefixedSubExpressionData {
public:
PrefixNode(const JSTokenLocation&, ExpressionNode*, Operator, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
protected:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
virtual RegisterID* emitResolve(BytecodeGenerator&, RegisterID* = 0);
virtual RegisterID* emitBracket(BytecodeGenerator&, RegisterID* = 0);
virtual RegisterID* emitDot(BytecodeGenerator&, RegisterID* = 0);
ExpressionNode* m_expr;
Operator m_operator;
};
class PostfixNode final : public PrefixNode {
public:
PostfixNode(const JSTokenLocation&, ExpressionNode*, Operator, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
RegisterID* emitResolve(BytecodeGenerator&, RegisterID* = 0) override;
RegisterID* emitBracket(BytecodeGenerator&, RegisterID* = 0) override;
RegisterID* emitDot(BytecodeGenerator&, RegisterID* = 0) override;
};
class UnaryOpNode : public ExpressionNode {
public:
UnaryOpNode(const JSTokenLocation&, ResultType, ExpressionNode*, OpcodeID);
protected:
ExpressionNode* expr() { return m_expr; }
const ExpressionNode* expr() const { return m_expr; }
OpcodeID opcodeID() const { return m_opcodeID; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
OpcodeID m_opcodeID;
};
class UnaryPlusNode final : public UnaryOpNode {
public:
UnaryPlusNode(const JSTokenLocation&, ExpressionNode*);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* stripUnaryPlus() override { return expr(); }
};
class NegateNode final : public UnaryOpNode {
public:
NegateNode(const JSTokenLocation&, ExpressionNode*);
};
class BitwiseNotNode final : public UnaryOpNode {
public:
BitwiseNotNode(const JSTokenLocation&, ExpressionNode*);
};
class LogicalNotNode final : public UnaryOpNode {
public:
LogicalNotNode(const JSTokenLocation&, ExpressionNode*);
private:
void emitBytecodeInConditionContext(BytecodeGenerator&, Label& trueTarget, Label& falseTarget, FallThroughMode) override;
};
class BinaryOpNode : public ExpressionNode {
public:
BinaryOpNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, OpcodeID, bool rightHasAssignments);
BinaryOpNode(const JSTokenLocation&, ResultType, ExpressionNode* expr1, ExpressionNode* expr2, OpcodeID, bool rightHasAssignments);
RegisterID* emitStrcat(BytecodeGenerator& generator, RegisterID* destination, RegisterID* lhs = 0, ReadModifyResolveNode* emitExpressionInfoForMe = 0);
void emitBytecodeInConditionContext(BytecodeGenerator&, Label& trueTarget, Label& falseTarget, FallThroughMode) override;
ExpressionNode* lhs() { return m_expr1; };
ExpressionNode* rhs() { return m_expr2; };
bool isBinaryOpNode() const override { return true; }
private:
enum class UInt32Result : uint8_t { UInt32, Constant, };
void tryFoldToBranch(BytecodeGenerator&, TriState& branchCondition, ExpressionNode*& branchExpression);
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
protected:
OpcodeID opcodeID() const { return m_opcodeID; }
protected:
bool m_rightHasAssignments;
bool m_shouldToUnsignedResult { true };
private:
OpcodeID m_opcodeID;
protected:
ExpressionNode* m_expr1;
ExpressionNode* m_expr2;
};
class PowNode final : public BinaryOpNode {
public:
PowNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class MultNode final : public BinaryOpNode {
public:
MultNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class DivNode final : public BinaryOpNode {
public:
DivNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class ModNode final : public BinaryOpNode {
public:
ModNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class AddNode final : public BinaryOpNode {
public:
AddNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
bool isAdd() const override { return true; }
};
class SubNode final : public BinaryOpNode {
public:
SubNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
bool isSubtract() const override { return true; }
};
class LeftShiftNode final : public BinaryOpNode {
public:
LeftShiftNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class RightShiftNode final : public BinaryOpNode {
public:
RightShiftNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class UnsignedRightShiftNode final : public BinaryOpNode {
public:
UnsignedRightShiftNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class LessNode final : public BinaryOpNode {
public:
LessNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class GreaterNode final : public BinaryOpNode {
public:
GreaterNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class LessEqNode final : public BinaryOpNode {
public:
LessEqNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class GreaterEqNode final : public BinaryOpNode {
public:
GreaterEqNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class ThrowableBinaryOpNode : public BinaryOpNode, public ThrowableExpressionData {
public:
ThrowableBinaryOpNode(const JSTokenLocation&, ResultType, ExpressionNode* expr1, ExpressionNode* expr2, OpcodeID, bool rightHasAssignments);
ThrowableBinaryOpNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, OpcodeID, bool rightHasAssignments);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class InstanceOfNode final : public ThrowableBinaryOpNode {
public:
InstanceOfNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class InNode final : public ThrowableBinaryOpNode {
public:
InNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class EqualNode final : public BinaryOpNode {
public:
EqualNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class NotEqualNode final : public BinaryOpNode {
public:
NotEqualNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class StrictEqualNode final : public BinaryOpNode {
public:
StrictEqualNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class NotStrictEqualNode final : public BinaryOpNode {
public:
NotStrictEqualNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class BitAndNode final : public BinaryOpNode {
public:
BitAndNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class BitOrNode final : public BinaryOpNode {
public:
BitOrNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
class BitXOrNode final : public BinaryOpNode {
public:
BitXOrNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments);
};
// m_expr1 && m_expr2, m_expr1 || m_expr2
class LogicalOpNode final : public ExpressionNode {
public:
LogicalOpNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, LogicalOperator);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void emitBytecodeInConditionContext(BytecodeGenerator&, Label& trueTarget, Label& falseTarget, FallThroughMode) override;
LogicalOperator m_operator;
ExpressionNode* m_expr1;
ExpressionNode* m_expr2;
};
class CoalesceNode final : public ExpressionNode {
public:
CoalesceNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, bool);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = nullptr) final;
ExpressionNode* m_expr1;
ExpressionNode* m_expr2;
bool m_hasAbsorbedOptionalChain;
};
class OptionalChainNode final : public ExpressionNode {
public:
OptionalChainNode(const JSTokenLocation&, ExpressionNode*, bool);
void setExpr(ExpressionNode* expr) { m_expr = expr; }
ExpressionNode* expr() const { return m_expr; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = nullptr) final;
bool isOptionalChain() const final { return true; }
ExpressionNode* m_expr;
bool m_isOutermost;
};
// The ternary operator, "m_logical ? m_expr1 : m_expr2"
class ConditionalNode final : public ExpressionNode {
public:
ConditionalNode(const JSTokenLocation&, ExpressionNode* logical, ExpressionNode* expr1, ExpressionNode* expr2);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_logical;
ExpressionNode* m_expr1;
ExpressionNode* m_expr2;
};
class ReadModifyResolveNode final : public ExpressionNode, public ThrowableExpressionData {
public:
ReadModifyResolveNode(const JSTokenLocation&, const Identifier&, Operator, ExpressionNode* right, bool rightHasAssignments, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
ExpressionNode* m_right;
Operator m_operator;
bool m_rightHasAssignments;
};
class AssignResolveNode final : public ExpressionNode, public ThrowableExpressionData {
public:
AssignResolveNode(const JSTokenLocation&, const Identifier&, ExpressionNode* right, AssignmentContext);
bool isAssignResolveNode() const override { return true; }
const Identifier& identifier() const { return m_ident; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
ExpressionNode* m_right;
AssignmentContext m_assignmentContext;
};
class ReadModifyBracketNode final : public ExpressionNode, public ThrowableSubExpressionData {
public:
ReadModifyBracketNode(const JSTokenLocation&, ExpressionNode* base, ExpressionNode* subscript, Operator, ExpressionNode* right, bool subscriptHasAssignments, bool rightHasAssignments, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_base;
ExpressionNode* m_subscript;
ExpressionNode* m_right;
unsigned m_operator : 30;
bool m_subscriptHasAssignments : 1;
bool m_rightHasAssignments : 1;
};
class AssignBracketNode final : public ExpressionNode, public ThrowableExpressionData {
public:
AssignBracketNode(const JSTokenLocation&, ExpressionNode* base, ExpressionNode* subscript, ExpressionNode* right, bool subscriptHasAssignments, bool rightHasAssignments, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_base;
ExpressionNode* m_subscript;
ExpressionNode* m_right;
bool m_subscriptHasAssignments : 1;
bool m_rightHasAssignments : 1;
};
class AssignDotNode final : public ExpressionNode, public ThrowableExpressionData {
public:
AssignDotNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&, ExpressionNode* right, bool rightHasAssignments, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_base;
const Identifier& m_ident;
ExpressionNode* m_right;
bool m_rightHasAssignments;
};
class ReadModifyDotNode final : public ExpressionNode, public ThrowableSubExpressionData {
public:
ReadModifyDotNode(const JSTokenLocation&, ExpressionNode* base, const Identifier&, Operator, ExpressionNode* right, bool rightHasAssignments, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_base;
const Identifier& m_ident;
ExpressionNode* m_right;
unsigned m_operator : 31;
bool m_rightHasAssignments : 1;
};
class AssignErrorNode final : public ExpressionNode, public ThrowableExpressionData {
public:
AssignErrorNode(const JSTokenLocation&, const JSTextPosition& divot, const JSTextPosition& divotStart, const JSTextPosition& divotEnd);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class CommaNode final : public ExpressionNode {
public:
CommaNode(const JSTokenLocation&, ExpressionNode*);
void setNext(CommaNode* next) { m_next = next; }
CommaNode* next() { return m_next; }
private:
bool isCommaNode() const override { return true; }
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
CommaNode* m_next { nullptr };
};
class SourceElements final : public ParserArenaFreeable {
public:
SourceElements();
void append(StatementNode*);
StatementNode* singleStatement() const;
StatementNode* lastStatement() const;
bool hasCompletionValue() const;
bool hasEarlyBreakOrContinue() const;
void emitBytecode(BytecodeGenerator&, RegisterID* destination);
void analyzeModule(ModuleAnalyzer&);
private:
StatementNode* m_head { nullptr };
StatementNode* m_tail { nullptr };
};
class BlockNode final : public StatementNode, public VariableEnvironmentNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(BlockNode);
public:
BlockNode(const JSTokenLocation&, SourceElements*, VariableEnvironment&, FunctionStack&&);
StatementNode* singleStatement() const;
StatementNode* lastStatement() const;
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool hasCompletionValue() const override;
bool hasEarlyBreakOrContinue() const override;
bool isBlock() const override { return true; }
SourceElements* m_statements;
};
class EmptyStatementNode final : public StatementNode {
public:
EmptyStatementNode(const JSTokenLocation&);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool hasCompletionValue() const override { return false; }
bool isEmptyStatement() const override { return true; }
};
class DebuggerStatementNode final : public StatementNode {
public:
DebuggerStatementNode(const JSTokenLocation&);
bool hasCompletionValue() const override { return false; }
bool isDebuggerStatement() const override { return true; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class ExprStatementNode final : public StatementNode {
public:
ExprStatementNode(const JSTokenLocation&, ExpressionNode*);
ExpressionNode* expr() const { return m_expr; }
private:
bool isExprStatement() const override { return true; }
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
};
class DeclarationStatement final : public StatementNode {
public:
DeclarationStatement(const JSTokenLocation&, ExpressionNode*);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool hasCompletionValue() const override { return false; }
ExpressionNode* m_expr;
};
class EmptyVarExpression final : public ExpressionNode {
public:
EmptyVarExpression(const JSTokenLocation&, const Identifier&);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
};
class EmptyLetExpression final : public ExpressionNode {
public:
EmptyLetExpression(const JSTokenLocation&, const Identifier&);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
};
class IfElseNode final : public StatementNode {
public:
IfElseNode(const JSTokenLocation&, ExpressionNode* condition, StatementNode* ifBlock, StatementNode* elseBlock);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool tryFoldBreakAndContinue(BytecodeGenerator&, StatementNode* ifBlock,
Label*& trueTarget, FallThroughMode&);
ExpressionNode* m_condition;
StatementNode* m_ifBlock;
StatementNode* m_elseBlock;
};
class DoWhileNode final : public StatementNode {
public:
DoWhileNode(const JSTokenLocation&, StatementNode*, ExpressionNode*);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
StatementNode* m_statement;
ExpressionNode* m_expr;
};
class WhileNode final : public StatementNode {
public:
WhileNode(const JSTokenLocation&, ExpressionNode*, StatementNode*);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
StatementNode* m_statement;
};
class ForNode final : public StatementNode, public VariableEnvironmentNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ForNode);
public:
ForNode(const JSTokenLocation&, ExpressionNode* expr1, ExpressionNode* expr2, ExpressionNode* expr3, StatementNode*, VariableEnvironment&);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr1;
ExpressionNode* m_expr2;
ExpressionNode* m_expr3;
StatementNode* m_statement;
};
class DestructuringPatternNode;
class EnumerationNode : public StatementNode, public ThrowableExpressionData, public VariableEnvironmentNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(EnumerationNode);
public:
EnumerationNode(const JSTokenLocation&, ExpressionNode*, ExpressionNode*, StatementNode*, VariableEnvironment&);
ExpressionNode* lexpr() const { return m_lexpr; }
ExpressionNode* expr() const { return m_expr; }
protected:
ExpressionNode* m_lexpr;
ExpressionNode* m_expr;
StatementNode* m_statement;
};
class ForInNode final : public EnumerationNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ForInNode);
public:
ForInNode(const JSTokenLocation&, ExpressionNode*, ExpressionNode*, StatementNode*, VariableEnvironment&);
private:
RegisterID* tryGetBoundLocal(BytecodeGenerator&);
void emitLoopHeader(BytecodeGenerator&, RegisterID* propertyName);
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class ForOfNode final : public EnumerationNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ForOfNode);
public:
ForOfNode(bool, const JSTokenLocation&, ExpressionNode*, ExpressionNode*, StatementNode*, VariableEnvironment&);
bool isForOfNode() const override { return true; }
bool isForAwait() const { return m_isForAwait; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const bool m_isForAwait;
};
class ContinueNode final : public StatementNode, public ThrowableExpressionData {
public:
ContinueNode(const JSTokenLocation&, const Identifier&);
Label* trivialTarget(BytecodeGenerator&);
private:
bool hasCompletionValue() const override { return false; }
bool isContinue() const override { return true; }
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
};
class BreakNode final : public StatementNode, public ThrowableExpressionData {
public:
BreakNode(const JSTokenLocation&, const Identifier&);
Label* trivialTarget(BytecodeGenerator&);
private:
bool hasCompletionValue() const override { return false; }
bool isBreak() const override { return true; }
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_ident;
};
class ReturnNode final : public StatementNode, public ThrowableExpressionData {
public:
ReturnNode(const JSTokenLocation&, ExpressionNode* value);
ExpressionNode* value() { return m_value; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isReturnNode() const override { return true; }
ExpressionNode* m_value;
};
class WithNode final : public StatementNode {
public:
WithNode(const JSTokenLocation&, ExpressionNode*, StatementNode*, const JSTextPosition& divot, uint32_t expressionLength);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
StatementNode* m_statement;
JSTextPosition m_divot;
uint32_t m_expressionLength;
};
class LabelNode final : public StatementNode, public ThrowableExpressionData {
public:
LabelNode(const JSTokenLocation&, const Identifier& name, StatementNode*);
bool isLabel() const override { return true; }
private:
bool hasCompletionValue() const override { return m_statement->hasCompletionValue(); }
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
const Identifier& m_name;
StatementNode* m_statement;
};
class ThrowNode final : public StatementNode, public ThrowableExpressionData {
public:
ThrowNode(const JSTokenLocation&, ExpressionNode*);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
};
class TryNode final : public StatementNode, public VariableEnvironmentNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(TryNode);
public:
TryNode(const JSTokenLocation&, StatementNode* tryBlock, DestructuringPatternNode* catchPattern, StatementNode* catchBlock, VariableEnvironment& catchEnvironment, StatementNode* finallyBlock);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
StatementNode* m_tryBlock;
DestructuringPatternNode* m_catchPattern;
StatementNode* m_catchBlock;
StatementNode* m_finallyBlock;
};
class ScopeNode : public StatementNode, public ParserArenaRoot, public VariableEnvironmentNode {
public:
// ScopeNode is never directly instantiate. The life-cycle of its derived classes are
// managed using std::unique_ptr. Hence, though ScopeNode extends VariableEnvironmentNode,
// which in turn extends ParserArenaDeletable, we don't want to use ParserArenaDeletable's
// new for allocation.
using ParserArenaRoot::operator new;
ScopeNode(ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end, bool inStrictContext);
ScopeNode(ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end, const SourceCode&, SourceElements*, VariableEnvironment&, FunctionStack&&, VariableEnvironment&, UniquedStringImplPtrSet&&, CodeFeatures, InnerArrowFunctionCodeFeatures, int numConstants);
const SourceCode& source() const { return m_source; }
const String& sourceURL() const { return m_source.provider()->url(); }
intptr_t sourceID() const { return m_source.providerID(); }
int startLine() const { return m_startLineNumber; }
int startStartOffset() const { return m_startStartOffset; }
int startLineStartOffset() const { return m_startLineStartOffset; }
void setFeatures(CodeFeatures features) { m_features = features; }
CodeFeatures features() { return m_features; }
InnerArrowFunctionCodeFeatures innerArrowFunctionCodeFeatures() { return m_innerArrowFunctionCodeFeatures; }
bool doAnyInnerArrowFunctionsUseAnyFeature() { return m_innerArrowFunctionCodeFeatures != NoInnerArrowFunctionFeatures; }
bool doAnyInnerArrowFunctionsUseArguments() { return m_innerArrowFunctionCodeFeatures & ArgumentsInnerArrowFunctionFeature; }
bool doAnyInnerArrowFunctionsUseSuperCall() { return m_innerArrowFunctionCodeFeatures & SuperCallInnerArrowFunctionFeature; }
bool doAnyInnerArrowFunctionsUseSuperProperty() { return m_innerArrowFunctionCodeFeatures & SuperPropertyInnerArrowFunctionFeature; }
bool doAnyInnerArrowFunctionsUseEval() { return m_innerArrowFunctionCodeFeatures & EvalInnerArrowFunctionFeature; }
bool doAnyInnerArrowFunctionsUseThis() { return m_innerArrowFunctionCodeFeatures & ThisInnerArrowFunctionFeature; }
bool doAnyInnerArrowFunctionsUseNewTarget() { return m_innerArrowFunctionCodeFeatures & NewTargetInnerArrowFunctionFeature; }
bool usesEval() const { return m_features & EvalFeature; }
bool usesArguments() const { return (m_features & ArgumentsFeature) && !(m_features & ShadowsArgumentsFeature); }
bool usesArrowFunction() const { return m_features & ArrowFunctionFeature; }
bool isStrictMode() const { return m_features & StrictModeFeature; }
void setUsesArguments() { m_features |= ArgumentsFeature; }
bool usesThis() const { return m_features & ThisFeature; }
bool usesSuperCall() const { return m_features & SuperCallFeature; }
bool usesSuperProperty() const { return m_features & SuperPropertyFeature; }
bool usesNewTarget() const { return m_features & NewTargetFeature; }
bool needsActivation() const { return (hasCapturedVariables()) || (m_features & (EvalFeature | WithFeature)); }
bool hasCapturedVariables() const { return m_varDeclarations.hasCapturedVariables(); }
bool captures(UniquedStringImpl* uid) { return m_varDeclarations.captures(uid); }
bool captures(const Identifier& ident) { return captures(ident.impl()); }
bool hasSloppyModeHoistedFunction(UniquedStringImpl* uid) const { return m_sloppyModeHoistedFunctions.contains(uid); }
bool needsNewTargetRegisterForThisScope() const
{
return usesSuperCall() || usesNewTarget();
}
VariableEnvironment& varDeclarations() { return m_varDeclarations; }
int neededConstants()
{
// We may need 2 more constants than the count given by the parser,
// because of the various uses of jsUndefined() and jsNull().
return m_numConstants + 2;
}
StatementNode* singleStatement() const;
bool hasCompletionValue() const override;
bool hasEarlyBreakOrContinue() const override;
void emitStatementsBytecode(BytecodeGenerator&, RegisterID* destination);
void analyzeModule(ModuleAnalyzer&);
protected:
int m_startLineNumber;
unsigned m_startStartOffset;
unsigned m_startLineStartOffset;
private:
CodeFeatures m_features;
InnerArrowFunctionCodeFeatures m_innerArrowFunctionCodeFeatures;
SourceCode m_source;
VariableEnvironment m_varDeclarations;
UniquedStringImplPtrSet m_sloppyModeHoistedFunctions;
int m_numConstants;
SourceElements* m_statements;
};
class ProgramNode final : public ScopeNode {
public:
ProgramNode(ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end, unsigned startColumn, unsigned endColumn, SourceElements*, VariableEnvironment&, FunctionStack&&, VariableEnvironment&, UniquedStringImplPtrSet&&, FunctionParameters*, const SourceCode&, CodeFeatures, InnerArrowFunctionCodeFeatures, int numConstants, RefPtr<ModuleScopeData>&&);
unsigned startColumn() const { return m_startColumn; }
unsigned endColumn() const { return m_endColumn; }
static constexpr bool scopeIsFunction = false;
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
unsigned m_startColumn;
unsigned m_endColumn;
};
class EvalNode final : public ScopeNode {
public:
EvalNode(ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end, unsigned startColumn, unsigned endColumn, SourceElements*, VariableEnvironment&, FunctionStack&&, VariableEnvironment&, UniquedStringImplPtrSet&&, FunctionParameters*, const SourceCode&, CodeFeatures, InnerArrowFunctionCodeFeatures, int numConstants, RefPtr<ModuleScopeData>&&);
ALWAYS_INLINE unsigned startColumn() const { return 0; }
unsigned endColumn() const { return m_endColumn; }
static constexpr bool scopeIsFunction = false;
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
unsigned m_endColumn;
};
class ModuleProgramNode final : public ScopeNode {
public:
ModuleProgramNode(ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end, unsigned startColumn, unsigned endColumn, SourceElements*, VariableEnvironment&, FunctionStack&&, VariableEnvironment&, UniquedStringImplPtrSet&&, FunctionParameters*, const SourceCode&, CodeFeatures, InnerArrowFunctionCodeFeatures, int numConstants, RefPtr<ModuleScopeData>&&);
unsigned startColumn() const { return m_startColumn; }
unsigned endColumn() const { return m_endColumn; }
static constexpr bool scopeIsFunction = false;
ModuleScopeData& moduleScopeData()
{
return m_moduleScopeData;
}
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
unsigned m_startColumn;
unsigned m_endColumn;
Ref<ModuleScopeData> m_moduleScopeData;
};
class ModuleNameNode final : public Node {
public:
ModuleNameNode(const JSTokenLocation&, const Identifier& moduleName);
const Identifier& moduleName() { return m_moduleName; }
private:
const Identifier& m_moduleName;
};
class ImportSpecifierNode final : public Node {
public:
ImportSpecifierNode(const JSTokenLocation&, const Identifier& importedName, const Identifier& localName);
const Identifier& importedName() { return m_importedName; }
const Identifier& localName() { return m_localName; }
private:
const Identifier& m_importedName;
const Identifier& m_localName;
};
class ImportSpecifierListNode final : public ParserArenaDeletable {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ImportSpecifierListNode);
public:
typedef Vector<ImportSpecifierNode*, 3> Specifiers;
const Specifiers& specifiers() const { return m_specifiers; }
void append(ImportSpecifierNode* specifier)
{
m_specifiers.append(specifier);
}
private:
Specifiers m_specifiers;
};
class ModuleDeclarationNode : public StatementNode {
public:
virtual void analyzeModule(ModuleAnalyzer&) = 0;
bool hasCompletionValue() const override { return false; }
bool isModuleDeclarationNode() const override { return true; }
protected:
ModuleDeclarationNode(const JSTokenLocation&);
};
class ImportDeclarationNode final : public ModuleDeclarationNode {
public:
ImportDeclarationNode(const JSTokenLocation&, ImportSpecifierListNode*, ModuleNameNode*);
ImportSpecifierListNode* specifierList() const { return m_specifierList; }
ModuleNameNode* moduleName() const { return m_moduleName; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void analyzeModule(ModuleAnalyzer&) override;
ImportSpecifierListNode* m_specifierList;
ModuleNameNode* m_moduleName;
};
class ExportAllDeclarationNode final : public ModuleDeclarationNode {
public:
ExportAllDeclarationNode(const JSTokenLocation&, ModuleNameNode*);
ModuleNameNode* moduleName() const { return m_moduleName; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void analyzeModule(ModuleAnalyzer&) override;
ModuleNameNode* m_moduleName;
};
class ExportDefaultDeclarationNode final : public ModuleDeclarationNode {
public:
ExportDefaultDeclarationNode(const JSTokenLocation&, StatementNode*, const Identifier& localName);
const StatementNode& declaration() const { return *m_declaration; }
const Identifier& localName() const { return m_localName; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void analyzeModule(ModuleAnalyzer&) override;
StatementNode* m_declaration;
const Identifier& m_localName;
};
class ExportLocalDeclarationNode final : public ModuleDeclarationNode {
public:
ExportLocalDeclarationNode(const JSTokenLocation&, StatementNode*);
const StatementNode& declaration() const { return *m_declaration; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void analyzeModule(ModuleAnalyzer&) override;
StatementNode* m_declaration;
};
class ExportSpecifierNode final : public Node {
public:
ExportSpecifierNode(const JSTokenLocation&, const Identifier& localName, const Identifier& exportedName);
const Identifier& exportedName() { return m_exportedName; }
const Identifier& localName() { return m_localName; }
private:
const Identifier& m_localName;
const Identifier& m_exportedName;
};
class ExportSpecifierListNode final : public ParserArenaDeletable {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ExportSpecifierListNode);
public:
typedef Vector<ExportSpecifierNode*, 3> Specifiers;
const Specifiers& specifiers() const { return m_specifiers; }
void append(ExportSpecifierNode* specifier)
{
m_specifiers.append(specifier);
}
private:
Specifiers m_specifiers;
};
class ExportNamedDeclarationNode final : public ModuleDeclarationNode {
public:
ExportNamedDeclarationNode(const JSTokenLocation&, ExportSpecifierListNode*, ModuleNameNode*);
ExportSpecifierListNode* specifierList() const { return m_specifierList; }
ModuleNameNode* moduleName() const { return m_moduleName; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
void analyzeModule(ModuleAnalyzer&) override;
ExportSpecifierListNode* m_specifierList;
ModuleNameNode* m_moduleName { nullptr };
};
class FunctionMetadataNode final : public ParserArenaDeletable, public Node {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(FunctionMetadataNode);
public:
FunctionMetadataNode(
ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end,
unsigned startColumn, unsigned endColumn, int functionKeywordStart,
int functionNameStart, int parametersStart, bool isInStrictContext,
ConstructorKind, SuperBinding, unsigned parameterCount,
SourceParseMode, bool isArrowFunctionBodyExpression);
FunctionMetadataNode(
const JSTokenLocation& start, const JSTokenLocation& end,
unsigned startColumn, unsigned endColumn, int functionKeywordStart,
int functionNameStart, int parametersStart, bool isInStrictContext,
ConstructorKind, SuperBinding, unsigned parameterCount,
SourceParseMode, bool isArrowFunctionBodyExpression);
void dump(PrintStream&) const;
void finishParsing(const SourceCode&, const Identifier&, FunctionMode);
void overrideName(const Identifier& ident) { m_ident = ident; }
const Identifier& ident() { return m_ident; }
void setEcmaName(const Identifier& ecmaName) { m_ecmaName = ecmaName; }
const Identifier& ecmaName() { return m_ident.isEmpty() ? m_ecmaName : m_ident; }
FunctionMode functionMode() { return m_functionMode; }
int functionNameStart() const { return m_functionNameStart; }
int functionKeywordStart() const { return m_functionKeywordStart; }
int parametersStart() const { return m_parametersStart; }
unsigned startColumn() const { return m_startColumn; }
unsigned endColumn() const { return m_endColumn; }
unsigned parameterCount() const { return m_parameterCount; }
SourceParseMode parseMode() const { return m_parseMode; }
void setEndPosition(JSTextPosition);
const SourceCode& source() const { return m_source; }
const SourceCode& classSource() const { return m_classSource; }
void setClassSource(const SourceCode& source) { m_classSource = source; }
int startStartOffset() const { return m_startStartOffset; }
bool isInStrictContext() const { return m_isInStrictContext; }
SuperBinding superBinding() { return static_cast<SuperBinding>(m_superBinding); }
ConstructorKind constructorKind() { return static_cast<ConstructorKind>(m_constructorKind); }
bool isArrowFunctionBodyExpression() const { return m_isArrowFunctionBodyExpression; }
void setLoc(unsigned firstLine, unsigned lastLine, int startOffset, int lineStartOffset)
{
m_lastLine = lastLine;
m_position = JSTextPosition(firstLine, startOffset, lineStartOffset);
ASSERT(m_position.offset >= m_position.lineStartOffset);
}
unsigned lastLine() const { return m_lastLine; }
bool operator==(const FunctionMetadataNode&) const;
bool operator!=(const FunctionMetadataNode& other) const
{
return !(*this == other);
}
public:
unsigned m_isInStrictContext : 1;
unsigned m_superBinding : 1;
unsigned m_constructorKind : 2;
unsigned m_isArrowFunctionBodyExpression : 1;
SourceParseMode m_parseMode;
FunctionMode m_functionMode;
Identifier m_ident;
Identifier m_ecmaName;
unsigned m_startColumn;
unsigned m_endColumn;
int m_functionKeywordStart;
int m_functionNameStart;
int m_parametersStart;
SourceCode m_source;
SourceCode m_classSource;
int m_startStartOffset;
unsigned m_parameterCount;
int m_lastLine;
};
class FunctionNode final : public ScopeNode {
public:
FunctionNode(ParserArena&, const JSTokenLocation& start, const JSTokenLocation& end, unsigned startColumn, unsigned endColumn, SourceElements*, VariableEnvironment&, FunctionStack&&, VariableEnvironment&, UniquedStringImplPtrSet&&, FunctionParameters*, const SourceCode&, CodeFeatures, InnerArrowFunctionCodeFeatures, int numConstants, RefPtr<ModuleScopeData>&&);
FunctionParameters* parameters() const { return m_parameters; }
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFunctionNode() const override { return true; }
void finishParsing(const Identifier&, FunctionMode);
const Identifier& ident() { return m_ident; }
FunctionMode functionMode() const { return m_functionMode; }
unsigned startColumn() const { return m_startColumn; }
unsigned endColumn() const { return m_endColumn; }
static constexpr bool scopeIsFunction = true;
private:
Identifier m_ident;
FunctionMode m_functionMode;
FunctionParameters* m_parameters;
unsigned m_startColumn;
unsigned m_endColumn;
};
class BaseFuncExprNode : public ExpressionNode {
public:
FunctionMetadataNode* metadata() { return m_metadata; }
bool isBaseFuncExprNode() const override { return true; }
protected:
BaseFuncExprNode(const JSTokenLocation&, const Identifier&, FunctionMetadataNode*, const SourceCode&, FunctionMode);
FunctionMetadataNode* m_metadata;
};
class FuncExprNode : public BaseFuncExprNode {
public:
FuncExprNode(const JSTokenLocation&, const Identifier&, FunctionMetadataNode*, const SourceCode&);
protected:
FuncExprNode(const JSTokenLocation&, const Identifier&, FunctionMetadataNode*, const SourceCode&, FunctionMode);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isFuncExprNode() const override { return true; }
};
class ArrowFuncExprNode final : public BaseFuncExprNode {
public:
ArrowFuncExprNode(const JSTokenLocation&, const Identifier&, FunctionMetadataNode*, const SourceCode&);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isArrowFuncExprNode() const override { return true; }
};
class MethodDefinitionNode final : public FuncExprNode {
public:
MethodDefinitionNode(const JSTokenLocation&, const Identifier&, FunctionMetadataNode*, const SourceCode&);
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
};
class YieldExprNode final : public ExpressionNode, public ThrowableExpressionData {
public:
YieldExprNode(const JSTokenLocation&, ExpressionNode* argument, bool delegate);
ExpressionNode* argument() const { return m_argument; }
bool delegate() const { return m_delegate; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_argument;
bool m_delegate;
};
class AwaitExprNode final : public ExpressionNode, public ThrowableExpressionData {
public:
AwaitExprNode(const JSTokenLocation&, ExpressionNode* argument);
ExpressionNode* argument() const { return m_argument; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_argument;
};
class ClassExprNode final : public ExpressionNode, public VariableEnvironmentNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ClassExprNode);
public:
ClassExprNode(const JSTokenLocation&, const Identifier&, const SourceCode& classSource,
VariableEnvironment& classEnvironment, ExpressionNode* constructorExpresssion,
ExpressionNode* parentClass, PropertyListNode* classElements);
const Identifier& name() { return m_name; }
const Identifier& ecmaName() { return m_ecmaName ? *m_ecmaName : m_name; }
void setEcmaName(const Identifier& name) { m_ecmaName = m_name.isNull() ? &name : &m_name; }
bool hasStaticProperty(const Identifier& propName) { return m_classElements ? m_classElements->hasStaticallyNamedProperty(propName) : false; }
private:
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool isClassExprNode() const override { return true; }
SourceCode m_classSource;
const Identifier& m_name;
const Identifier* m_ecmaName;
ExpressionNode* m_constructorExpression;
ExpressionNode* m_classHeritage;
PropertyListNode* m_classElements;
};
class DestructuringPatternNode : public ParserArenaFreeable {
public:
virtual ~DestructuringPatternNode() { }
virtual void collectBoundIdentifiers(Vector<Identifier>&) const = 0;
virtual void bindValue(BytecodeGenerator&, RegisterID* source) const = 0;
virtual void toString(StringBuilder&) const = 0;
virtual bool isBindingNode() const { return false; }
virtual bool isAssignmentElementNode() const { return false; }
virtual bool isRestParameter() const { return false; }
virtual RegisterID* emitDirectBinding(BytecodeGenerator&, RegisterID*, ExpressionNode*) { return 0; }
protected:
DestructuringPatternNode();
};
class ArrayPatternNode final : public DestructuringPatternNode, public ParserArenaDeletable, public ThrowableExpressionData {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ArrayPatternNode);
public:
ArrayPatternNode();
enum class BindingType : uint8_t {
Elision,
Element,
RestElement
};
void appendIndex(BindingType bindingType, const JSTokenLocation&, DestructuringPatternNode* node, ExpressionNode* defaultValue)
{
m_targetPatterns.append({ bindingType, node, defaultValue });
}
private:
struct Entry {
BindingType bindingType;
DestructuringPatternNode* pattern;
ExpressionNode* defaultValue;
};
void collectBoundIdentifiers(Vector<Identifier>&) const override;
void bindValue(BytecodeGenerator&, RegisterID*) const override;
RegisterID* emitDirectBinding(BytecodeGenerator&, RegisterID* dst, ExpressionNode*) override;
void toString(StringBuilder&) const override;
Vector<Entry> m_targetPatterns;
};
class ObjectPatternNode final : public DestructuringPatternNode, public ParserArenaDeletable, public ThrowableExpressionData {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(ObjectPatternNode);
public:
ObjectPatternNode();
enum class BindingType : uint8_t {
Element,
RestElement
};
void appendEntry(const JSTokenLocation&, const Identifier& identifier, bool wasString, DestructuringPatternNode* pattern, ExpressionNode* defaultValue, BindingType bindingType)
{
m_targetPatterns.append(Entry{ identifier, nullptr, wasString, pattern, defaultValue, bindingType });
}
void appendEntry(VM& vm, const JSTokenLocation&, ExpressionNode* propertyExpression, DestructuringPatternNode* pattern, ExpressionNode* defaultValue, BindingType bindingType)
{
m_targetPatterns.append(Entry{ vm.propertyNames->nullIdentifier, propertyExpression, false, pattern, defaultValue, bindingType });
}
void setContainsRestElement(bool containsRestElement)
{
m_containsRestElement = containsRestElement;
}
void setContainsComputedProperty(bool containsComputedProperty)
{
m_containsComputedProperty = containsComputedProperty;
}
private:
void collectBoundIdentifiers(Vector<Identifier>&) const override;
void bindValue(BytecodeGenerator&, RegisterID*) const override;
void toString(StringBuilder&) const override;
struct Entry {
const Identifier& propertyName;
ExpressionNode* propertyExpression;
bool wasString;
DestructuringPatternNode* pattern;
ExpressionNode* defaultValue;
BindingType bindingType;
};
bool m_containsRestElement { false };
bool m_containsComputedProperty { false };
Vector<Entry> m_targetPatterns;
};
class BindingNode final: public DestructuringPatternNode {
public:
BindingNode(const Identifier& boundProperty, const JSTextPosition& start, const JSTextPosition& end, AssignmentContext);
const Identifier& boundProperty() const { return m_boundProperty; }
const JSTextPosition& divotStart() const { return m_divotStart; }
const JSTextPosition& divotEnd() const { return m_divotEnd; }
private:
void collectBoundIdentifiers(Vector<Identifier>&) const override;
void bindValue(BytecodeGenerator&, RegisterID*) const override;
void toString(StringBuilder&) const override;
bool isBindingNode() const override { return true; }
JSTextPosition m_divotStart;
JSTextPosition m_divotEnd;
const Identifier& m_boundProperty;
AssignmentContext m_bindingContext;
};
class RestParameterNode final : public DestructuringPatternNode {
public:
RestParameterNode(DestructuringPatternNode*, unsigned numParametersToSkip);
bool isRestParameter() const override { return true; }
void emit(BytecodeGenerator&);
private:
void collectBoundIdentifiers(Vector<Identifier>&) const override;
void bindValue(BytecodeGenerator&, RegisterID*) const override;
void toString(StringBuilder&) const override;
DestructuringPatternNode* m_pattern;
unsigned m_numParametersToSkip;
};
class AssignmentElementNode final : public DestructuringPatternNode {
public:
AssignmentElementNode(ExpressionNode* assignmentTarget, const JSTextPosition& start, const JSTextPosition& end);
const ExpressionNode* assignmentTarget() { return m_assignmentTarget; }
const JSTextPosition& divotStart() const { return m_divotStart; }
const JSTextPosition& divotEnd() const { return m_divotEnd; }
private:
void collectBoundIdentifiers(Vector<Identifier>&) const override;
void bindValue(BytecodeGenerator&, RegisterID*) const override;
void toString(StringBuilder&) const override;
bool isAssignmentElementNode() const override { return true; }
JSTextPosition m_divotStart;
JSTextPosition m_divotEnd;
ExpressionNode* m_assignmentTarget;
};
class DestructuringAssignmentNode final : public ExpressionNode {
public:
DestructuringAssignmentNode(const JSTokenLocation&, DestructuringPatternNode*, ExpressionNode*);
DestructuringPatternNode* bindings() { return m_bindings; }
private:
bool isAssignmentLocation() const override { return true; }
bool isDestructuringNode() const override { return true; }
RegisterID* emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
DestructuringPatternNode* m_bindings;
ExpressionNode* m_initializer;
};
class FunctionParameters final : public ParserArenaDeletable {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(FunctionParameters);
public:
FunctionParameters();
ALWAYS_INLINE unsigned size() const { return m_patterns.size(); }
ALWAYS_INLINE std::pair<DestructuringPatternNode*, ExpressionNode*> at(unsigned index) { return m_patterns[index]; }
ALWAYS_INLINE void append(DestructuringPatternNode* pattern, ExpressionNode* defaultValue)
{
ASSERT(pattern);
// http://www.ecma-international.org/ecma-262/6.0/index.html#sec-functiondeclarationinstantiation
// This implements IsSimpleParameterList in the Ecma 2015 spec.
// If IsSimpleParameterList is false, we will create a strict-mode like arguments object.
// IsSimpleParameterList is false if the argument list contains any default parameter values,
// a rest parameter, or any destructuring patterns.
// If we do have default parameters, destructuring parameters, or a rest parameter, our parameters will be allocated in a different scope.
bool hasDefaultParameterValue = defaultValue;
bool isSimpleParameter = !hasDefaultParameterValue && pattern->isBindingNode();
m_isSimpleParameterList &= isSimpleParameter;
m_patterns.append(std::make_pair(pattern, defaultValue));
}
ALWAYS_INLINE bool isSimpleParameterList() const { return m_isSimpleParameterList; }
private:
Vector<std::pair<DestructuringPatternNode*, ExpressionNode*>, 3> m_patterns;
bool m_isSimpleParameterList { true };
};
class FuncDeclNode final : public StatementNode {
public:
FuncDeclNode(const JSTokenLocation&, const Identifier&, FunctionMetadataNode*, const SourceCode&);
bool hasCompletionValue() const override { return false; }
bool isFuncDeclNode() const override { return true; }
FunctionMetadataNode* metadata() { return m_metadata; }
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
FunctionMetadataNode* m_metadata;
};
class ClassDeclNode final : public StatementNode {
public:
ClassDeclNode(const JSTokenLocation&, ExpressionNode* classExpression);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
bool hasCompletionValue() const override { return false; }
ExpressionNode* m_classDeclaration;
};
class CaseClauseNode final : public ParserArenaFreeable {
public:
CaseClauseNode(ExpressionNode*, SourceElements* = 0);
ExpressionNode* expr() const { return m_expr; }
void emitBytecode(BytecodeGenerator&, RegisterID* destination);
void setStartOffset(int offset) { m_startOffset = offset; }
private:
ExpressionNode* m_expr;
SourceElements* m_statements;
int m_startOffset;
};
class ClauseListNode final : public ParserArenaFreeable {
public:
ClauseListNode(CaseClauseNode*);
ClauseListNode(ClauseListNode*, CaseClauseNode*);
CaseClauseNode* getClause() const { return m_clause; }
ClauseListNode* getNext() const { return m_next; }
private:
CaseClauseNode* m_clause;
ClauseListNode* m_next { nullptr };
};
class CaseBlockNode final : public ParserArenaFreeable {
public:
CaseBlockNode(ClauseListNode* list1, CaseClauseNode* defaultClause, ClauseListNode* list2);
void emitBytecodeForBlock(BytecodeGenerator&, RegisterID* input, RegisterID* destination);
private:
SwitchInfo::SwitchType tryTableSwitch(Vector<ExpressionNode*, 8>& literalVector, int32_t& min_num, int32_t& max_num);
static constexpr size_t s_tableSwitchMinimum = 3;
ClauseListNode* m_list1;
CaseClauseNode* m_defaultClause;
ClauseListNode* m_list2;
};
class SwitchNode final : public StatementNode, public VariableEnvironmentNode {
JSC_MAKE_PARSER_ARENA_DELETABLE_ALLOCATED(SwitchNode);
public:
SwitchNode(const JSTokenLocation&, ExpressionNode*, CaseBlockNode*, VariableEnvironment&, FunctionStack&&);
private:
void emitBytecode(BytecodeGenerator&, RegisterID* = 0) override;
ExpressionNode* m_expr;
CaseBlockNode* m_block;
};
struct ElementList {
ElementNode* head;
ElementNode* tail;
};
struct PropertyList {
PropertyListNode* head;
PropertyListNode* tail;
};
struct ArgumentList {
ArgumentListNode* head;
ArgumentListNode* tail;
};
struct ClauseList {
ClauseListNode* head;
ClauseListNode* tail;
};
} // namespace JSC