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/*
* Copyright (C) 2010, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SyntaxChecker_h
#define SyntaxChecker_h
#include "Lexer.h"
#include <yarr/YarrSyntaxChecker.h>
namespace JSC {
class SyntaxChecker {
public:
struct BinaryExprContext {
BinaryExprContext(SyntaxChecker& context)
: m_context(&context)
{
m_context->m_topBinaryExprs.append(m_context->m_topBinaryExpr);
m_context->m_topBinaryExpr = 0;
}
~BinaryExprContext()
{
m_context->m_topBinaryExpr = m_context->m_topBinaryExprs.last();
m_context->m_topBinaryExprs.removeLast();
}
private:
SyntaxChecker* m_context;
};
struct UnaryExprContext {
UnaryExprContext(SyntaxChecker& context)
: m_context(&context)
{
m_context->m_topUnaryTokens.append(m_context->m_topUnaryToken);
m_context->m_topUnaryToken = 0;
}
~UnaryExprContext()
{
m_context->m_topUnaryToken = m_context->m_topUnaryTokens.last();
m_context->m_topUnaryTokens.removeLast();
}
private:
SyntaxChecker* m_context;
};
SyntaxChecker(VM* , void*)
{
}
typedef SyntaxChecker FunctionBodyBuilder;
enum { NoneExpr = 0,
ResolveEvalExpr, ResolveExpr, NumberExpr, StringExpr,
ThisExpr, NullExpr, BoolExpr, RegExpExpr, ObjectLiteralExpr,
FunctionExpr, BracketExpr, DotExpr, CallExpr,
NewExpr, PreExpr, PostExpr, UnaryExpr, BinaryExpr,
ConditionalExpr, AssignmentExpr, TypeofExpr,
DeleteExpr, ArrayLiteralExpr };
typedef int ExpressionType;
typedef ExpressionType Expression;
typedef int SourceElements;
typedef int Arguments;
typedef ExpressionType Comma;
struct Property {
ALWAYS_INLINE Property(void* = 0)
: type((PropertyNode::Type)0)
{
}
ALWAYS_INLINE Property(const Identifier* ident, PropertyNode::Type ty)
: name(ident)
, type(ty)
{
}
ALWAYS_INLINE Property(PropertyNode::Type ty)
: name(0)
, type(ty)
{
}
ALWAYS_INLINE bool operator!() { return !type; }
const Identifier* name;
PropertyNode::Type type;
};
typedef int PropertyList;
typedef int ElementList;
typedef int ArgumentsList;
typedef int FormalParameterList;
typedef int FunctionBody;
typedef int Statement;
typedef int ClauseList;
typedef int Clause;
typedef int ConstDeclList;
typedef int BinaryOperand;
static const bool CreatesAST = false;
static const bool NeedsFreeVariableInfo = false;
static const bool CanUseFunctionCache = true;
static const unsigned DontBuildKeywords = LexexFlagsDontBuildKeywords;
static const unsigned DontBuildStrings = LexerFlagsDontBuildStrings;
int createSourceElements() { return 1; }
ExpressionType makeFunctionCallNode(const JSTokenLocation&, int, int, int, int, int) { return CallExpr; }
void appendToComma(ExpressionType& base, ExpressionType right) { base = right; }
ExpressionType createCommaExpr(const JSTokenLocation&, ExpressionType, ExpressionType right) { return right; }
ExpressionType makeAssignNode(const JSTokenLocation&, ExpressionType, Operator, ExpressionType, bool, bool, int, int, int) { return AssignmentExpr; }
ExpressionType makePrefixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PreExpr; }
ExpressionType makePostfixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PostExpr; }
ExpressionType makeTypeOfNode(const JSTokenLocation&, ExpressionType) { return TypeofExpr; }
ExpressionType makeDeleteNode(const JSTokenLocation&, ExpressionType, int, int, int) { return DeleteExpr; }
ExpressionType makeNegateNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
ExpressionType makeBitwiseNotNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
ExpressionType createLogicalNot(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
ExpressionType createUnaryPlus(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
ExpressionType createVoid(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
ExpressionType thisExpr(const JSTokenLocation&) { return ThisExpr; }
ExpressionType createResolve(const JSTokenLocation&, const Identifier*, int) { return ResolveExpr; }
ExpressionType createObjectLiteral(const JSTokenLocation&) { return ObjectLiteralExpr; }
ExpressionType createObjectLiteral(const JSTokenLocation&, int) { return ObjectLiteralExpr; }
ExpressionType createArray(const JSTokenLocation&, int) { return ArrayLiteralExpr; }
ExpressionType createArray(const JSTokenLocation&, int, int) { return ArrayLiteralExpr; }
ExpressionType createNumberExpr(const JSTokenLocation&, double) { return NumberExpr; }
ExpressionType createString(const JSTokenLocation&, const Identifier*) { return StringExpr; }
ExpressionType createBoolean(const JSTokenLocation&, bool) { return BoolExpr; }
ExpressionType createNull(const JSTokenLocation&) { return NullExpr; }
ExpressionType createBracketAccess(const JSTokenLocation&, ExpressionType, ExpressionType, bool, int, int, int) { return BracketExpr; }
ExpressionType createDotAccess(const JSTokenLocation&, ExpressionType, const Identifier*, int, int, int) { return DotExpr; }
ExpressionType createRegExp(const JSTokenLocation&, const Identifier& pattern, const Identifier&, int) { return Yarr::checkSyntax(pattern.string()) ? 0 : RegExpExpr; }
ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int, int, int) { return NewExpr; }
ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int) { return NewExpr; }
ExpressionType createConditionalExpr(const JSTokenLocation&, ExpressionType, ExpressionType, ExpressionType) { return ConditionalExpr; }
ExpressionType createAssignResolve(const JSTokenLocation&, const Identifier&, ExpressionType, int, int, int) { return AssignmentExpr; }
ExpressionType createFunctionExpr(const JSTokenLocation&, const Identifier*, int, int, int, int, int, int, int) { return FunctionExpr; }
int createFunctionBody(const JSTokenLocation&, const JSTokenLocation&, int, bool) { return 1; }
void setFunctionStart(int, int) { }
int createArguments() { return 1; }
int createArguments(int) { return 1; }
int createArgumentsList(const JSTokenLocation&, int) { return 1; }
int createArgumentsList(const JSTokenLocation&, int, int) { return 1; }
template <bool complete> Property createProperty(const Identifier* name, int, PropertyNode::Type type)
{
if (!complete)
return Property(type);
ASSERT(name);
return Property(name, type);
}
template <bool complete> Property createProperty(VM* vm, double name, int, PropertyNode::Type type)
{
if (!complete)
return Property(type);
return Property(&vm->parserArena->identifierArena().makeNumericIdentifier(vm, name), type);
}
int createPropertyList(const JSTokenLocation&, Property) { return 1; }
int createPropertyList(const JSTokenLocation&, Property, int) { return 1; }
int createElementList(int, int) { return 1; }
int createElementList(int, int, int) { return 1; }
int createFormalParameterList(const Identifier&) { return 1; }
int createFormalParameterList(int, const Identifier&) { return 1; }
int createClause(int, int) { return 1; }
int createClauseList(int) { return 1; }
int createClauseList(int, int) { return 1; }
void setUsesArguments(int) { }
int createFuncDeclStatement(const JSTokenLocation&, const Identifier*, int, int, int, int, int, int, int) { return 1; }
int createBlockStatement(const JSTokenLocation&, int, int, int) { return 1; }
int createExprStatement(const JSTokenLocation&, int, int, int) { return 1; }
int createIfStatement(const JSTokenLocation&, int, int, int, int) { return 1; }
int createIfStatement(const JSTokenLocation&, int, int, int, int, int) { return 1; }
int createForLoop(const JSTokenLocation&, int, int, int, int, int, int) { return 1; }
int createForInLoop(const JSTokenLocation&, const Identifier*, int, int, int, int, int, int, int, int, int, int) { return 1; }
int createForInLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int) { return 1; }
int createEmptyStatement(const JSTokenLocation&) { return 1; }
int createVarStatement(const JSTokenLocation&, int, int, int) { return 1; }
int createReturnStatement(const JSTokenLocation&, int, int, int) { return 1; }
int createBreakStatement(const JSTokenLocation&, int, int) { return 1; }
int createBreakStatement(const JSTokenLocation&, const Identifier*, int, int) { return 1; }
int createContinueStatement(const JSTokenLocation&, int, int) { return 1; }
int createContinueStatement(const JSTokenLocation&, const Identifier*, int, int) { return 1; }
int createTryStatement(const JSTokenLocation&, int, const Identifier*, int, int, int, int) { return 1; }
int createSwitchStatement(const JSTokenLocation&, int, int, int, int, int, int) { return 1; }
int createWhileStatement(const JSTokenLocation&, int, int, int, int) { return 1; }
int createWithStatement(const JSTokenLocation&, int, int, int, int, int, int) { return 1; }
int createDoWhileStatement(const JSTokenLocation&, int, int, int, int) { return 1; }
int createLabelStatement(const JSTokenLocation&, const Identifier*, int, int, int) { return 1; }
int createThrowStatement(const JSTokenLocation&, int, int, int) { return 1; }
int createDebugger(const JSTokenLocation&, int, int) { return 1; }
int createConstStatement(const JSTokenLocation&, int, int, int) { return 1; }
int appendConstDecl(const JSTokenLocation&, int, const Identifier*, int) { return 1; }
template <bool strict> Property createGetterOrSetterProperty(const JSTokenLocation&, PropertyNode::Type type, const Identifier* name, int, int, int, int, int, int, int)
{
ASSERT(name);
if (!strict)
return Property(type);
return Property(name, type);
}
template <bool strict> Property createGetterOrSetterProperty(VM* vm, const JSTokenLocation&, PropertyNode::Type type, double name, int, int, int, int, int, int, int)
{
if (!strict)
return Property(type);
return Property(&vm->parserArena->identifierArena().makeNumericIdentifier(vm, name), type);
}
void appendStatement(int, int) { }
void addVar(const Identifier*, bool) { }
int combineCommaNodes(const JSTokenLocation&, int, int) { return 1; }
int evalCount() const { return 0; }
void appendBinaryExpressionInfo(int& operandStackDepth, int expr, int, int, int, bool)
{
if (!m_topBinaryExpr)
m_topBinaryExpr = expr;
else
m_topBinaryExpr = BinaryExpr;
operandStackDepth++;
}
// Logic to handle datastructures used during parsing of binary expressions
void operatorStackPop(int& operatorStackDepth) { operatorStackDepth--; }
bool operatorStackHasHigherPrecedence(int&, int) { return true; }
BinaryOperand getFromOperandStack(int) { return m_topBinaryExpr; }
void shrinkOperandStackBy(int& operandStackDepth, int amount) { operandStackDepth -= amount; }
void appendBinaryOperation(const JSTokenLocation&, int& operandStackDepth, int&, BinaryOperand, BinaryOperand) { operandStackDepth++; }
void operatorStackAppend(int& operatorStackDepth, int, int) { operatorStackDepth++; }
int popOperandStack(int&) { int res = m_topBinaryExpr; m_topBinaryExpr = 0; return res; }
void appendUnaryToken(int& stackDepth, int tok, int) { stackDepth = 1; m_topUnaryToken = tok; }
int unaryTokenStackLastType(int&) { return m_topUnaryToken; }
JSTextPosition unaryTokenStackLastStart(int&) { return JSTextPosition(0, 0, 0); }
void unaryTokenStackRemoveLast(int& stackDepth) { stackDepth = 0; }
void assignmentStackAppend(int, int, int, int, int, Operator) { }
int createAssignment(const JSTokenLocation&, int, int, int, int, int) { RELEASE_ASSERT_NOT_REACHED(); return 1; }
const Identifier& getName(const Property& property) const { ASSERT(property.name); return *property.name; }
PropertyNode::Type getType(const Property& property) const { return property.type; }
bool isResolve(ExpressionType expr) const { return expr == ResolveExpr || expr == ResolveEvalExpr; }
private:
int m_topBinaryExpr;
int m_topUnaryToken;
Vector<int, 8> m_topBinaryExprs;
Vector<int, 8> m_topUnaryTokens;
};
}
#endif
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