1/*
2 * Copyright (C) 2010, 2013, 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "Lexer.h"
29#include "ParserFunctionInfo.h"
30#include "YarrSyntaxChecker.h"
31
32namespace JSC {
33
34class SyntaxChecker {
35public:
36 struct BinaryExprContext {
37 BinaryExprContext(SyntaxChecker& context)
38 : m_context(&context)
39 {
40 m_token = m_context->m_topBinaryExpr;
41 m_context->m_topBinaryExpr = 0;
42 }
43 ~BinaryExprContext()
44 {
45 m_context->m_topBinaryExpr = m_token;
46 }
47 private:
48 int m_token;
49 SyntaxChecker* m_context;
50 };
51 struct UnaryExprContext {
52 UnaryExprContext(SyntaxChecker& context)
53 : m_context(&context)
54 {
55 m_token = m_context->m_topUnaryToken;
56 m_context->m_topUnaryToken = 0;
57 }
58 ~UnaryExprContext()
59 {
60 m_context->m_topUnaryToken = m_token;
61 }
62 private:
63 int m_token;
64 SyntaxChecker* m_context;
65 };
66
67 SyntaxChecker(VM* , void*)
68 {
69 }
70
71 static const constexpr int MetaPropertyBit = 0x80000000;
72 enum : int { NoneExpr = 0,
73 ResolveEvalExpr, ResolveExpr, IntegerExpr, DoubleExpr, StringExpr, BigIntExpr,
74 ThisExpr, NullExpr, BoolExpr, RegExpExpr, ObjectLiteralExpr,
75 FunctionExpr, ClassExpr, SuperExpr, ImportExpr, BracketExpr, DotExpr, CallExpr,
76 NewExpr, PreExpr, PostExpr, UnaryExpr, BinaryExpr,
77 ConditionalExpr, AssignmentExpr, TypeofExpr,
78 DeleteExpr, ArrayLiteralExpr, BindingDestructuring, RestParameter,
79 ArrayDestructuring, ObjectDestructuring, SourceElementsResult,
80 FunctionBodyResult, SpreadExpr, ObjectSpreadExpr, ArgumentsResult,
81 PropertyListResult, ArgumentsListResult, ElementsListResult,
82 StatementResult, FormalParameterListResult, ClauseResult,
83 ClauseListResult, CommaExpr, DestructuringAssignment,
84 TemplateStringResult, TemplateStringListResult,
85 TemplateExpressionListResult, TemplateExpr,
86 TaggedTemplateExpr, YieldExpr, AwaitExpr,
87 ModuleNameResult,
88 ImportSpecifierResult, ImportSpecifierListResult,
89 ExportSpecifierResult, ExportSpecifierListResult,
90
91 NewTargetExpr = MetaPropertyBit | 0,
92 ImportMetaExpr = MetaPropertyBit | 1,
93 };
94 typedef int ExpressionType;
95
96 typedef ExpressionType Expression;
97 typedef int SourceElements;
98 typedef int Arguments;
99 typedef ExpressionType Comma;
100 struct Property {
101 ALWAYS_INLINE Property(void* = 0)
102 : type((PropertyNode::Type)0)
103 {
104 }
105 ALWAYS_INLINE Property(const Identifier* ident, PropertyNode::Type ty)
106 : name(ident)
107 , type(ty)
108 {
109 }
110 ALWAYS_INLINE Property(PropertyNode::Type ty)
111 : name(0)
112 , type(ty)
113 {
114 }
115 ALWAYS_INLINE bool operator!() { return !type; }
116 const Identifier* name;
117 PropertyNode::Type type;
118 };
119 typedef int PropertyList;
120 typedef int ElementList;
121 typedef int ArgumentsList;
122 typedef int TemplateExpressionList;
123 typedef int TemplateString;
124 typedef int TemplateStringList;
125 typedef int TemplateLiteral;
126 typedef int FormalParameterList;
127 typedef int FunctionBody;
128 typedef int ClassExpression;
129 typedef int ModuleName;
130 typedef int ImportSpecifier;
131 typedef int ImportSpecifierList;
132 typedef int ExportSpecifier;
133 typedef int ExportSpecifierList;
134 typedef int Statement;
135 typedef int ClauseList;
136 typedef int Clause;
137 typedef int BinaryOperand;
138 typedef int DestructuringPattern;
139 typedef DestructuringPattern ArrayPattern;
140 typedef DestructuringPattern ObjectPattern;
141 typedef DestructuringPattern RestPattern;
142
143 static const bool CreatesAST = false;
144 static const bool NeedsFreeVariableInfo = false;
145 static const bool CanUseFunctionCache = true;
146 static const unsigned DontBuildKeywords = LexexFlagsDontBuildKeywords;
147 static const unsigned DontBuildStrings = LexerFlagsDontBuildStrings;
148
149 int createSourceElements() { return SourceElementsResult; }
150 ExpressionType makeFunctionCallNode(const JSTokenLocation&, int, bool, int, int, int, int, size_t) { return CallExpr; }
151 ExpressionType createCommaExpr(const JSTokenLocation&, ExpressionType expr) { return expr; }
152 ExpressionType appendToCommaExpr(const JSTokenLocation&, ExpressionType& head, ExpressionType, ExpressionType next) { head = next; return next; }
153 ExpressionType makeAssignNode(const JSTokenLocation&, ExpressionType, Operator, ExpressionType, bool, bool, int, int, int) { return AssignmentExpr; }
154 ExpressionType makePrefixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PreExpr; }
155 ExpressionType makePostfixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PostExpr; }
156 ExpressionType makeTypeOfNode(const JSTokenLocation&, ExpressionType) { return TypeofExpr; }
157 ExpressionType makeDeleteNode(const JSTokenLocation&, ExpressionType, int, int, int) { return DeleteExpr; }
158 ExpressionType makeNegateNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
159 ExpressionType makeBitwiseNotNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
160 ExpressionType createLogicalNot(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
161 ExpressionType createUnaryPlus(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
162 ExpressionType createVoid(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
163 ExpressionType createImportExpr(const JSTokenLocation&, ExpressionType, int, int, int) { return ImportExpr; }
164 ExpressionType createThisExpr(const JSTokenLocation&) { return ThisExpr; }
165 ExpressionType createSuperExpr(const JSTokenLocation&) { return SuperExpr; }
166 ExpressionType createNewTargetExpr(const JSTokenLocation&) { return NewTargetExpr; }
167 ExpressionType createImportMetaExpr(const JSTokenLocation&, ExpressionType) { return ImportMetaExpr; }
168 ALWAYS_INLINE bool isMetaProperty(ExpressionType type) { return type & MetaPropertyBit; }
169 ALWAYS_INLINE bool isNewTarget(ExpressionType type) { return type == NewTargetExpr; }
170 ALWAYS_INLINE bool isImportMeta(ExpressionType type) { return type == ImportMetaExpr; }
171 ExpressionType createResolve(const JSTokenLocation&, const Identifier&, int, int) { return ResolveExpr; }
172 ExpressionType createObjectLiteral(const JSTokenLocation&) { return ObjectLiteralExpr; }
173 ExpressionType createObjectLiteral(const JSTokenLocation&, int) { return ObjectLiteralExpr; }
174 ExpressionType createArray(const JSTokenLocation&, int) { return ArrayLiteralExpr; }
175 ExpressionType createArray(const JSTokenLocation&, int, int) { return ArrayLiteralExpr; }
176 ExpressionType createDoubleExpr(const JSTokenLocation&, double) { return DoubleExpr; }
177 ExpressionType createIntegerExpr(const JSTokenLocation&, double) { return IntegerExpr; }
178 ExpressionType createBigInt(const JSTokenLocation&, const Identifier*, int) { return BigIntExpr; }
179 ExpressionType createString(const JSTokenLocation&, const Identifier*) { return StringExpr; }
180 ExpressionType createBoolean(const JSTokenLocation&, bool) { return BoolExpr; }
181 ExpressionType createNull(const JSTokenLocation&) { return NullExpr; }
182 ExpressionType createBracketAccess(const JSTokenLocation&, ExpressionType, ExpressionType, bool, int, int, int) { return BracketExpr; }
183 ExpressionType createDotAccess(const JSTokenLocation&, ExpressionType, const Identifier*, int, int, int) { return DotExpr; }
184 ExpressionType createRegExp(const JSTokenLocation&, const Identifier& pattern, const Identifier& flags, int) { return Yarr::hasError(Yarr::checkSyntax(pattern.string(), flags.string())) ? 0 : RegExpExpr; }
185 ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int, int, int) { return NewExpr; }
186 ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int) { return NewExpr; }
187 ExpressionType createConditionalExpr(const JSTokenLocation&, ExpressionType, ExpressionType, ExpressionType) { return ConditionalExpr; }
188 ExpressionType createAssignResolve(const JSTokenLocation&, const Identifier&, ExpressionType, int, int, int, AssignmentContext) { return AssignmentExpr; }
189 ExpressionType createEmptyVarExpression(const JSTokenLocation&, const Identifier&) { return AssignmentExpr; }
190 ExpressionType createEmptyLetExpression(const JSTokenLocation&, const Identifier&) { return AssignmentExpr; }
191 ExpressionType createYield(const JSTokenLocation&) { return YieldExpr; }
192 ExpressionType createYield(const JSTokenLocation&, ExpressionType, bool, int, int, int) { return YieldExpr; }
193 ExpressionType createAwait(const JSTokenLocation&, ExpressionType, int, int, int) { return AwaitExpr; }
194 ClassExpression createClassExpr(const JSTokenLocation&, const ParserClassInfo<SyntaxChecker>&, VariableEnvironment&, ExpressionType, ExpressionType, PropertyList) { return ClassExpr; }
195 ExpressionType createFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
196 ExpressionType createGeneratorFunctionBody(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&, const Identifier&) { return FunctionExpr; }
197 ExpressionType createAsyncFunctionBody(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
198 int createFunctionMetadata(const JSTokenLocation&, const JSTokenLocation&, int, int, bool, int, int, int, ConstructorKind, SuperBinding, unsigned, SourceParseMode, bool, InnerArrowFunctionCodeFeatures = NoInnerArrowFunctionFeatures) { return FunctionBodyResult; }
199 ExpressionType createArrowFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
200 ExpressionType createMethodDefinition(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
201 void setFunctionNameStart(int, int) { }
202 int createArguments() { return ArgumentsResult; }
203 int createArguments(int) { return ArgumentsResult; }
204 ExpressionType createSpreadExpression(const JSTokenLocation&, ExpressionType, int, int, int) { return SpreadExpr; }
205 ExpressionType createObjectSpreadExpression(const JSTokenLocation&, ExpressionType, int, int, int) { return ObjectSpreadExpr; }
206 TemplateString createTemplateString(const JSTokenLocation&, const Identifier*, const Identifier*) { return TemplateStringResult; }
207 TemplateStringList createTemplateStringList(TemplateString) { return TemplateStringListResult; }
208 TemplateStringList createTemplateStringList(TemplateStringList, TemplateString) { return TemplateStringListResult; }
209 TemplateExpressionList createTemplateExpressionList(Expression) { return TemplateExpressionListResult; }
210 TemplateExpressionList createTemplateExpressionList(TemplateExpressionList, Expression) { return TemplateExpressionListResult; }
211 TemplateLiteral createTemplateLiteral(const JSTokenLocation&, TemplateStringList) { return TemplateExpr; }
212 TemplateLiteral createTemplateLiteral(const JSTokenLocation&, TemplateStringList, TemplateExpressionList) { return TemplateExpr; }
213 ExpressionType createTaggedTemplate(const JSTokenLocation&, ExpressionType, TemplateLiteral, int, int, int) { return TaggedTemplateExpr; }
214
215 int createArgumentsList(const JSTokenLocation&, int) { return ArgumentsListResult; }
216 int createArgumentsList(const JSTokenLocation&, int, int) { return ArgumentsListResult; }
217 Property createProperty(const Identifier* name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete, SuperBinding, InferName, ClassElementTag)
218 {
219 if (!complete)
220 return Property(type);
221 ASSERT(name);
222 return Property(name, type);
223 }
224 Property createProperty(int, PropertyNode::Type type, PropertyNode::PutType, bool, SuperBinding, ClassElementTag)
225 {
226 return Property(type);
227 }
228 Property createProperty(VM* vm, ParserArena& parserArena, double name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete, SuperBinding, ClassElementTag)
229 {
230 if (!complete)
231 return Property(type);
232 return Property(&parserArena.identifierArena().makeNumericIdentifier(vm, name), type);
233 }
234 Property createProperty(int, int, PropertyNode::Type type, PropertyNode::PutType, bool, SuperBinding, ClassElementTag)
235 {
236 return Property(type);
237 }
238 int createPropertyList(const JSTokenLocation&, Property) { return PropertyListResult; }
239 int createPropertyList(const JSTokenLocation&, Property, int) { return PropertyListResult; }
240 int createElementList(int, int) { return ElementsListResult; }
241 int createElementList(int, int, int) { return ElementsListResult; }
242 int createElementList(int) { return ElementsListResult; }
243 int createFormalParameterList() { return FormalParameterListResult; }
244 void appendParameter(int, DestructuringPattern, int) { }
245 int createClause(int, int) { return ClauseResult; }
246 int createClauseList(int) { return ClauseListResult; }
247 int createClauseList(int, int) { return ClauseListResult; }
248 int createFuncDeclStatement(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return StatementResult; }
249 int createClassDeclStatement(const JSTokenLocation&, ClassExpression,
250 const JSTextPosition&, const JSTextPosition&, int, int) { return StatementResult; }
251 int createBlockStatement(const JSTokenLocation&, int, int, int, VariableEnvironment&, DeclarationStacks::FunctionStack&&) { return StatementResult; }
252 int createExprStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
253 int createIfStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; }
254 int createIfStatement(const JSTokenLocation&, int, int, int, int, int) { return StatementResult; }
255 int createForLoop(const JSTokenLocation&, int, int, int, int, int, int, VariableEnvironment&) { return StatementResult; }
256 int createForInLoop(const JSTokenLocation&, int, int, int, const JSTokenLocation&, int, int, int, int, int, VariableEnvironment&) { return StatementResult; }
257 int createForOfLoop(bool, const JSTokenLocation&, int, int, int, const JSTokenLocation&, int, int, int, int, int, VariableEnvironment&) { return StatementResult; }
258 int createEmptyStatement(const JSTokenLocation&) { return StatementResult; }
259 int createDeclarationStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
260 int createReturnStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
261 int createBreakStatement(const JSTokenLocation&, int, int) { return StatementResult; }
262 int createBreakStatement(const JSTokenLocation&, const Identifier*, int, int) { return StatementResult; }
263 int createContinueStatement(const JSTokenLocation&, int, int) { return StatementResult; }
264 int createContinueStatement(const JSTokenLocation&, const Identifier*, int, int) { return StatementResult; }
265 int createTryStatement(const JSTokenLocation&, int, int, int, int, int, int, VariableEnvironment&) { return StatementResult; }
266 int createSwitchStatement(const JSTokenLocation&, int, int, int, int, int, int, VariableEnvironment&, DeclarationStacks::FunctionStack&&) { return StatementResult; }
267 int createWhileStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; }
268 int createWithStatement(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; }
269 int createDoWhileStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; }
270 int createLabelStatement(const JSTokenLocation&, const Identifier*, int, int, int) { return StatementResult; }
271 int createThrowStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
272 int createDebugger(const JSTokenLocation&, int, int) { return StatementResult; }
273 int createConstStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
274 int createModuleName(const JSTokenLocation&, const Identifier&) { return ModuleNameResult; }
275 ImportSpecifier createImportSpecifier(const JSTokenLocation&, const Identifier&, const Identifier&) { return ImportSpecifierResult; }
276 ImportSpecifierList createImportSpecifierList() { return ImportSpecifierListResult; }
277 void appendImportSpecifier(ImportSpecifierList, ImportSpecifier) { }
278 int createImportDeclaration(const JSTokenLocation&, ImportSpecifierList, ModuleName) { return StatementResult; }
279 int createExportAllDeclaration(const JSTokenLocation&, ModuleName) { return StatementResult; }
280 int createExportDefaultDeclaration(const JSTokenLocation&, int, const Identifier&) { return StatementResult; }
281 int createExportLocalDeclaration(const JSTokenLocation&, int) { return StatementResult; }
282 int createExportNamedDeclaration(const JSTokenLocation&, ExportSpecifierList, ModuleName) { return StatementResult; }
283 ExportSpecifier createExportSpecifier(const JSTokenLocation&, const Identifier&, const Identifier&) { return ExportSpecifierResult; }
284 ExportSpecifierList createExportSpecifierList() { return ExportSpecifierListResult; }
285 void appendExportSpecifier(ExportSpecifierList, ExportSpecifier) { }
286
287 int appendConstDecl(const JSTokenLocation&, int, const Identifier*, int) { return StatementResult; }
288 Property createGetterOrSetterProperty(const JSTokenLocation&, PropertyNode::Type type, bool strict, const Identifier* name, const ParserFunctionInfo<SyntaxChecker>&, ClassElementTag)
289 {
290 ASSERT(name);
291 if (!strict)
292 return Property(type);
293 return Property(name, type);
294 }
295 Property createGetterOrSetterProperty(const JSTokenLocation&, PropertyNode::Type type, bool, int, const ParserFunctionInfo<SyntaxChecker>&, ClassElementTag)
296 {
297 return Property(type);
298 }
299 Property createGetterOrSetterProperty(VM* vm, ParserArena& parserArena, const JSTokenLocation&, PropertyNode::Type type, bool strict, double name, const ParserFunctionInfo<SyntaxChecker>&, ClassElementTag)
300 {
301 if (!strict)
302 return Property(type);
303 return Property(&parserArena.identifierArena().makeNumericIdentifier(vm, name), type);
304 }
305
306 void appendStatement(int, int) { }
307 int combineCommaNodes(const JSTokenLocation&, int, int) { return CommaExpr; }
308 int evalCount() const { return 0; }
309 void appendBinaryExpressionInfo(int& operandStackDepth, int expr, int, int, int, bool)
310 {
311 if (!m_topBinaryExpr)
312 m_topBinaryExpr = expr;
313 else
314 m_topBinaryExpr = BinaryExpr;
315 operandStackDepth++;
316 }
317
318 // Logic to handle datastructures used during parsing of binary expressions
319 void operatorStackPop(int& operatorStackDepth) { operatorStackDepth--; }
320 bool operatorStackShouldReduce(int) { return true; }
321 BinaryOperand getFromOperandStack(int) { return m_topBinaryExpr; }
322 void shrinkOperandStackBy(int& operandStackDepth, int amount) { operandStackDepth -= amount; }
323 void appendBinaryOperation(const JSTokenLocation&, int& operandStackDepth, int&, BinaryOperand, BinaryOperand) { operandStackDepth++; }
324 void operatorStackAppend(int& operatorStackDepth, int, int) { operatorStackDepth++; }
325 int popOperandStack(int&) { int res = m_topBinaryExpr; m_topBinaryExpr = 0; return res; }
326
327 void appendUnaryToken(int& stackDepth, int tok, int) { stackDepth = 1; m_topUnaryToken = tok; }
328 int unaryTokenStackLastType(int&) { return m_topUnaryToken; }
329 JSTextPosition unaryTokenStackLastStart(int&) { return JSTextPosition(0, 0, 0); }
330 void unaryTokenStackRemoveLast(int& stackDepth) { stackDepth = 0; }
331
332 void assignmentStackAppend(int, int, int, int, int, Operator) { }
333 int createAssignment(const JSTokenLocation&, int, int, int, int, int) { RELEASE_ASSERT_NOT_REACHED(); return AssignmentExpr; }
334 const Identifier* getName(const Property& property) const { return property.name; }
335 PropertyNode::Type getType(const Property& property) const { return property.type; }
336 bool isResolve(ExpressionType expr) const { return expr == ResolveExpr || expr == ResolveEvalExpr; }
337 ExpressionType createDestructuringAssignment(const JSTokenLocation&, int, ExpressionType)
338 {
339 return DestructuringAssignment;
340 }
341
342 ArrayPattern createArrayPattern(const JSTokenLocation&)
343 {
344 return ArrayDestructuring;
345 }
346 void appendArrayPatternSkipEntry(ArrayPattern, const JSTokenLocation&)
347 {
348 }
349 void appendArrayPatternEntry(ArrayPattern, const JSTokenLocation&, DestructuringPattern, int)
350 {
351 }
352 void appendArrayPatternRestEntry(ArrayPattern, const JSTokenLocation&, DestructuringPattern)
353 {
354 }
355 void finishArrayPattern(ArrayPattern, const JSTextPosition&, const JSTextPosition&, const JSTextPosition&)
356 {
357 }
358 ObjectPattern createObjectPattern(const JSTokenLocation&)
359 {
360 return ObjectDestructuring;
361 }
362 void appendObjectPatternEntry(ObjectPattern, const JSTokenLocation&, bool, const Identifier&, DestructuringPattern, int)
363 {
364 }
365 void appendObjectPatternEntry(VM&, ObjectPattern, const JSTokenLocation&, Expression, DestructuringPattern, Expression)
366 {
367 }
368 void appendObjectPatternRestEntry(VM&, ObjectPattern, const JSTokenLocation&, DestructuringPattern)
369 {
370 }
371 void setContainsObjectRestElement(ObjectPattern, bool)
372 {
373 }
374 void setContainsComputedProperty(ObjectPattern, bool)
375 {
376 }
377
378 DestructuringPattern createBindingLocation(const JSTokenLocation&, const Identifier&, const JSTextPosition&, const JSTextPosition&, AssignmentContext)
379 {
380 return BindingDestructuring;
381 }
382 RestPattern createRestParameter(DestructuringPattern, size_t)
383 {
384 return RestParameter;
385 }
386 DestructuringPattern createAssignmentElement(const Expression&, const JSTextPosition&, const JSTextPosition&)
387 {
388 return BindingDestructuring;
389 }
390
391 bool isBindingNode(DestructuringPattern pattern)
392 {
393 return pattern == BindingDestructuring;
394 }
395
396 bool isLocation(ExpressionType type)
397 {
398 return type == ResolveExpr || type == DotExpr || type == BracketExpr;
399 }
400
401 bool isAssignmentLocation(ExpressionType type)
402 {
403 return isLocation(type) || type == DestructuringAssignment;
404 }
405
406 bool isObjectLiteral(ExpressionType type)
407 {
408 return type == ObjectLiteralExpr;
409 }
410
411 bool isArrayLiteral(ExpressionType type)
412 {
413 return type == ArrayLiteralExpr;
414 }
415
416 bool isObjectOrArrayLiteral(ExpressionType type)
417 {
418 return isObjectLiteral(type) || isArrayLiteral(type);
419 }
420
421 bool isFunctionCall(ExpressionType type)
422 {
423 return type == CallExpr;
424 }
425
426 bool shouldSkipPauseLocation(int) const { return true; }
427
428 void setEndOffset(int, int) { }
429 int endOffset(int) { return 0; }
430 void setStartOffset(int, int) { }
431
432 JSTextPosition breakpointLocation(int) { return JSTextPosition(-1, 0, 0); }
433
434 void propagateArgumentsUse() { }
435
436private:
437 int m_topBinaryExpr;
438 int m_topUnaryToken;
439};
440
441} // namespace JSC
442