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1 | /* | |
2 | * Copyright (C) 2010, 2013 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 | #ifndef SyntaxChecker_h | |
27 | #define SyntaxChecker_h | |
28 | ||
29 | #include "Lexer.h" | |
30 | #include "ParserFunctionInfo.h" | |
31 | #include "YarrSyntaxChecker.h" | |
32 | ||
33 | namespace JSC { | |
34 | ||
35 | class SyntaxChecker { | |
36 | public: | |
37 | struct BinaryExprContext { | |
38 | BinaryExprContext(SyntaxChecker& context) | |
39 | : m_context(&context) | |
40 | { | |
41 | m_context->m_topBinaryExprs.append(m_context->m_topBinaryExpr); | |
42 | m_context->m_topBinaryExpr = 0; | |
43 | } | |
44 | ~BinaryExprContext() | |
45 | { | |
46 | m_context->m_topBinaryExpr = m_context->m_topBinaryExprs.last(); | |
47 | m_context->m_topBinaryExprs.removeLast(); | |
48 | } | |
49 | private: | |
50 | SyntaxChecker* m_context; | |
51 | }; | |
52 | struct UnaryExprContext { | |
53 | UnaryExprContext(SyntaxChecker& context) | |
54 | : m_context(&context) | |
55 | { | |
56 | m_context->m_topUnaryTokens.append(m_context->m_topUnaryToken); | |
57 | m_context->m_topUnaryToken = 0; | |
58 | } | |
59 | ~UnaryExprContext() | |
60 | { | |
61 | m_context->m_topUnaryToken = m_context->m_topUnaryTokens.last(); | |
62 | m_context->m_topUnaryTokens.removeLast(); | |
63 | } | |
64 | private: | |
65 | SyntaxChecker* m_context; | |
66 | }; | |
67 | ||
68 | SyntaxChecker(VM* , void*) | |
69 | { | |
70 | } | |
71 | ||
72 | typedef SyntaxChecker FunctionBodyBuilder; | |
73 | enum { NoneExpr = 0, | |
74 | ResolveEvalExpr, ResolveExpr, IntegerExpr, DoubleExpr, StringExpr, | |
75 | ThisExpr, NullExpr, BoolExpr, RegExpExpr, ObjectLiteralExpr, | |
76 | FunctionExpr, ClassExpr, SuperExpr, BracketExpr, DotExpr, CallExpr, | |
77 | NewExpr, PreExpr, PostExpr, UnaryExpr, BinaryExpr, | |
78 | ConditionalExpr, AssignmentExpr, TypeofExpr, | |
79 | DeleteExpr, ArrayLiteralExpr, BindingDestructuring, | |
80 | ArrayDestructuring, ObjectDestructuring, SourceElementsResult, | |
81 | FunctionBodyResult, SpreadExpr, ArgumentsResult, | |
82 | PropertyListResult, ArgumentsListResult, ElementsListResult, | |
83 | StatementResult, FormalParameterListResult, ClauseResult, | |
84 | ClauseListResult, CommaExpr, DestructuringAssignment, | |
85 | TemplateStringResult, TemplateStringListResult, | |
86 | TemplateExpressionListResult, TemplateExpr, | |
87 | TaggedTemplateExpr | |
88 | }; | |
89 | typedef int ExpressionType; | |
90 | ||
91 | typedef ExpressionType Expression; | |
92 | typedef int SourceElements; | |
93 | typedef int Arguments; | |
94 | typedef ExpressionType Comma; | |
95 | struct Property { | |
96 | ALWAYS_INLINE Property(void* = 0) | |
97 | : type((PropertyNode::Type)0) | |
98 | { | |
99 | } | |
100 | ALWAYS_INLINE Property(const Identifier* ident, PropertyNode::Type ty) | |
101 | : name(ident) | |
102 | , type(ty) | |
103 | { | |
104 | } | |
105 | ALWAYS_INLINE Property(PropertyNode::Type ty) | |
106 | : name(0) | |
107 | , type(ty) | |
108 | { | |
109 | } | |
110 | ALWAYS_INLINE bool operator!() { return !type; } | |
111 | const Identifier* name; | |
112 | PropertyNode::Type type; | |
113 | }; | |
114 | typedef int PropertyList; | |
115 | typedef int ElementList; | |
116 | typedef int ArgumentsList; | |
117 | #if ENABLE(ES6_TEMPLATE_LITERAL_SYNTAX) | |
118 | typedef int TemplateExpressionList; | |
119 | typedef int TemplateString; | |
120 | typedef int TemplateStringList; | |
121 | typedef int TemplateLiteral; | |
122 | #endif | |
123 | typedef int FormalParameterList; | |
124 | typedef int FunctionBody; | |
125 | #if ENABLE(ES6_CLASS_SYNTAX) | |
126 | typedef int ClassExpression; | |
127 | #endif | |
128 | typedef int Statement; | |
129 | typedef int ClauseList; | |
130 | typedef int Clause; | |
131 | typedef int ConstDeclList; | |
132 | typedef int BinaryOperand; | |
133 | typedef int DestructuringPattern; | |
134 | typedef DestructuringPattern ArrayPattern; | |
135 | typedef DestructuringPattern ObjectPattern; | |
136 | ||
137 | static const bool CreatesAST = false; | |
138 | static const bool NeedsFreeVariableInfo = false; | |
139 | static const bool CanUseFunctionCache = true; | |
140 | static const unsigned DontBuildKeywords = LexexFlagsDontBuildKeywords; | |
141 | static const unsigned DontBuildStrings = LexerFlagsDontBuildStrings; | |
142 | ||
143 | int createSourceElements() { return SourceElementsResult; } | |
144 | ExpressionType makeFunctionCallNode(const JSTokenLocation&, int, int, int, int, int) { return CallExpr; } | |
145 | ExpressionType createCommaExpr(const JSTokenLocation&, ExpressionType expr) { return expr; } | |
146 | ExpressionType appendToCommaExpr(const JSTokenLocation&, ExpressionType& head, ExpressionType, ExpressionType next) { head = next; return next; } | |
147 | ExpressionType makeAssignNode(const JSTokenLocation&, ExpressionType, Operator, ExpressionType, bool, bool, int, int, int) { return AssignmentExpr; } | |
148 | ExpressionType makePrefixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PreExpr; } | |
149 | ExpressionType makePostfixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PostExpr; } | |
150 | ExpressionType makeTypeOfNode(const JSTokenLocation&, ExpressionType) { return TypeofExpr; } | |
151 | ExpressionType makeDeleteNode(const JSTokenLocation&, ExpressionType, int, int, int) { return DeleteExpr; } | |
152 | ExpressionType makeNegateNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; } | |
153 | ExpressionType makeBitwiseNotNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; } | |
154 | ExpressionType createLogicalNot(const JSTokenLocation&, ExpressionType) { return UnaryExpr; } | |
155 | ExpressionType createUnaryPlus(const JSTokenLocation&, ExpressionType) { return UnaryExpr; } | |
156 | ExpressionType createVoid(const JSTokenLocation&, ExpressionType) { return UnaryExpr; } | |
157 | ExpressionType thisExpr(const JSTokenLocation&, ThisTDZMode) { return ThisExpr; } | |
158 | ExpressionType superExpr(const JSTokenLocation&) { return SuperExpr; } | |
159 | ExpressionType createResolve(const JSTokenLocation&, const Identifier*, int) { return ResolveExpr; } | |
160 | ExpressionType createObjectLiteral(const JSTokenLocation&) { return ObjectLiteralExpr; } | |
161 | ExpressionType createObjectLiteral(const JSTokenLocation&, int) { return ObjectLiteralExpr; } | |
162 | ExpressionType createArray(const JSTokenLocation&, int) { return ArrayLiteralExpr; } | |
163 | ExpressionType createArray(const JSTokenLocation&, int, int) { return ArrayLiteralExpr; } | |
164 | ExpressionType createDoubleExpr(const JSTokenLocation&, double) { return DoubleExpr; } | |
165 | ExpressionType createIntegerExpr(const JSTokenLocation&, double) { return IntegerExpr; } | |
166 | ExpressionType createString(const JSTokenLocation&, const Identifier*) { return StringExpr; } | |
167 | ExpressionType createBoolean(const JSTokenLocation&, bool) { return BoolExpr; } | |
168 | ExpressionType createNull(const JSTokenLocation&) { return NullExpr; } | |
169 | ExpressionType createBracketAccess(const JSTokenLocation&, ExpressionType, ExpressionType, bool, int, int, int) { return BracketExpr; } | |
170 | ExpressionType createDotAccess(const JSTokenLocation&, ExpressionType, const Identifier*, int, int, int) { return DotExpr; } | |
171 | ExpressionType createRegExp(const JSTokenLocation&, const Identifier& pattern, const Identifier&, int) { return Yarr::checkSyntax(pattern.string()) ? 0 : RegExpExpr; } | |
172 | ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int, int, int) { return NewExpr; } | |
173 | ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int) { return NewExpr; } | |
174 | ExpressionType createConditionalExpr(const JSTokenLocation&, ExpressionType, ExpressionType, ExpressionType) { return ConditionalExpr; } | |
175 | ExpressionType createAssignResolve(const JSTokenLocation&, const Identifier&, ExpressionType, int, int, int) { return AssignmentExpr; } | |
176 | ExpressionType createEmptyVarExpression(const JSTokenLocation&, const Identifier&) { return AssignmentExpr; } | |
177 | #if ENABLE(ES6_CLASS_SYNTAX) | |
178 | ClassExpression createClassExpr(const JSTokenLocation&, const Identifier&, ExpressionType, ExpressionType, PropertyList, PropertyList) { return ClassExpr; } | |
179 | #endif | |
180 | ExpressionType createFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; } | |
181 | int createFunctionBody(const JSTokenLocation&, const JSTokenLocation&, int, int, bool, int, int, int, ConstructorKind) { return FunctionBodyResult; } | |
182 | #if ENABLE(ES6_ARROWFUNCTION_SYNTAX) | |
183 | ExpressionType createArrowFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; } | |
184 | #endif | |
185 | void setFunctionNameStart(int, int) { } | |
186 | int createArguments() { return ArgumentsResult; } | |
187 | int createArguments(int) { return ArgumentsResult; } | |
188 | ExpressionType createSpreadExpression(const JSTokenLocation&, ExpressionType, int, int, int) { return SpreadExpr; } | |
189 | #if ENABLE(ES6_TEMPLATE_LITERAL_SYNTAX) | |
190 | TemplateString createTemplateString(const JSTokenLocation&, const Identifier&, const Identifier&) { return TemplateStringResult; } | |
191 | TemplateStringList createTemplateStringList(TemplateString) { return TemplateStringListResult; } | |
192 | TemplateStringList createTemplateStringList(TemplateStringList, TemplateString) { return TemplateStringListResult; } | |
193 | TemplateExpressionList createTemplateExpressionList(Expression) { return TemplateExpressionListResult; } | |
194 | TemplateExpressionList createTemplateExpressionList(TemplateExpressionList, Expression) { return TemplateExpressionListResult; } | |
195 | TemplateLiteral createTemplateLiteral(const JSTokenLocation&, TemplateStringList) { return TemplateExpr; } | |
196 | TemplateLiteral createTemplateLiteral(const JSTokenLocation&, TemplateStringList, TemplateExpressionList) { return TemplateExpr; } | |
197 | ExpressionType createTaggedTemplate(const JSTokenLocation&, ExpressionType, TemplateLiteral, int, int, int) { return TaggedTemplateExpr; } | |
198 | #endif | |
199 | ||
200 | int createArgumentsList(const JSTokenLocation&, int) { return ArgumentsListResult; } | |
201 | int createArgumentsList(const JSTokenLocation&, int, int) { return ArgumentsListResult; } | |
202 | Property createProperty(const Identifier* name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete, SuperBinding = SuperBinding::NotNeeded) | |
203 | { | |
204 | if (!complete) | |
205 | return Property(type); | |
206 | ASSERT(name); | |
207 | return Property(name, type); | |
208 | } | |
209 | Property createProperty(VM* vm, ParserArena& parserArena, double name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete) | |
210 | { | |
211 | if (!complete) | |
212 | return Property(type); | |
213 | return Property(&parserArena.identifierArena().makeNumericIdentifier(vm, name), type); | |
214 | } | |
215 | Property createProperty(int, int, PropertyNode::Type type, PropertyNode::PutType, bool) | |
216 | { | |
217 | return Property(type); | |
218 | } | |
219 | int createPropertyList(const JSTokenLocation&, Property) { return PropertyListResult; } | |
220 | int createPropertyList(const JSTokenLocation&, Property, int) { return PropertyListResult; } | |
221 | int createElementList(int, int) { return ElementsListResult; } | |
222 | int createElementList(int, int, int) { return ElementsListResult; } | |
223 | int createFormalParameterList(DestructuringPattern) { return FormalParameterListResult; } | |
224 | int createFormalParameterList(int, DestructuringPattern) { return FormalParameterListResult; } | |
225 | int createClause(int, int) { return ClauseResult; } | |
226 | int createClauseList(int) { return ClauseListResult; } | |
227 | int createClauseList(int, int) { return ClauseListResult; } | |
228 | int createFuncDeclStatement(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return StatementResult; } | |
229 | #if ENABLE(ES6_CLASS_SYNTAX) | |
230 | int createClassDeclStatement(const JSTokenLocation&, ClassExpression, | |
231 | const JSTextPosition&, const JSTextPosition&, int, int) { return StatementResult; } | |
232 | #endif | |
233 | int createBlockStatement(const JSTokenLocation&, int, int, int) { return StatementResult; } | |
234 | int createExprStatement(const JSTokenLocation&, int, int, int) { return StatementResult; } | |
235 | int createIfStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; } | |
236 | int createIfStatement(const JSTokenLocation&, int, int, int, int, int) { return StatementResult; } | |
237 | int createForLoop(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; } | |
238 | int createForInLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int) { return StatementResult; } | |
239 | int createForOfLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int) { return StatementResult; } | |
240 | int createEmptyStatement(const JSTokenLocation&) { return StatementResult; } | |
241 | int createVarStatement(const JSTokenLocation&, int, int, int) { return StatementResult; } | |
242 | int createReturnStatement(const JSTokenLocation&, int, int, int) { return StatementResult; } | |
243 | int createBreakStatement(const JSTokenLocation&, int, int) { return StatementResult; } | |
244 | int createBreakStatement(const JSTokenLocation&, const Identifier*, int, int) { return StatementResult; } | |
245 | int createContinueStatement(const JSTokenLocation&, int, int) { return StatementResult; } | |
246 | int createContinueStatement(const JSTokenLocation&, const Identifier*, int, int) { return StatementResult; } | |
247 | int createTryStatement(const JSTokenLocation&, int, const Identifier*, int, int, int, int) { return StatementResult; } | |
248 | int createSwitchStatement(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; } | |
249 | int createWhileStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; } | |
250 | int createWithStatement(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; } | |
251 | int createDoWhileStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; } | |
252 | int createLabelStatement(const JSTokenLocation&, const Identifier*, int, int, int) { return StatementResult; } | |
253 | int createThrowStatement(const JSTokenLocation&, int, int, int) { return StatementResult; } | |
254 | int createDebugger(const JSTokenLocation&, int, int) { return StatementResult; } | |
255 | int createConstStatement(const JSTokenLocation&, int, int, int) { return StatementResult; } | |
256 | int appendConstDecl(const JSTokenLocation&, int, const Identifier*, int) { return StatementResult; } | |
257 | Property createGetterOrSetterProperty(const JSTokenLocation&, PropertyNode::Type type, bool strict, const Identifier* name, const ParserFunctionInfo<SyntaxChecker>&, SuperBinding) | |
258 | { | |
259 | ASSERT(name); | |
260 | if (!strict) | |
261 | return Property(type); | |
262 | return Property(name, type); | |
263 | } | |
264 | Property createGetterOrSetterProperty(VM* vm, ParserArena& parserArena, const JSTokenLocation&, PropertyNode::Type type, bool strict, double name, const ParserFunctionInfo<SyntaxChecker>&, SuperBinding) | |
265 | { | |
266 | if (!strict) | |
267 | return Property(type); | |
268 | return Property(&parserArena.identifierArena().makeNumericIdentifier(vm, name), type); | |
269 | } | |
270 | ||
271 | void appendStatement(int, int) { } | |
272 | void addVar(const Identifier*, bool) { } | |
273 | int combineCommaNodes(const JSTokenLocation&, int, int) { return CommaExpr; } | |
274 | int evalCount() const { return 0; } | |
275 | void appendBinaryExpressionInfo(int& operandStackDepth, int expr, int, int, int, bool) | |
276 | { | |
277 | if (!m_topBinaryExpr) | |
278 | m_topBinaryExpr = expr; | |
279 | else | |
280 | m_topBinaryExpr = BinaryExpr; | |
281 | operandStackDepth++; | |
282 | } | |
283 | ||
284 | // Logic to handle datastructures used during parsing of binary expressions | |
285 | void operatorStackPop(int& operatorStackDepth) { operatorStackDepth--; } | |
286 | bool operatorStackHasHigherPrecedence(int&, int) { return true; } | |
287 | BinaryOperand getFromOperandStack(int) { return m_topBinaryExpr; } | |
288 | void shrinkOperandStackBy(int& operandStackDepth, int amount) { operandStackDepth -= amount; } | |
289 | void appendBinaryOperation(const JSTokenLocation&, int& operandStackDepth, int&, BinaryOperand, BinaryOperand) { operandStackDepth++; } | |
290 | void operatorStackAppend(int& operatorStackDepth, int, int) { operatorStackDepth++; } | |
291 | int popOperandStack(int&) { int res = m_topBinaryExpr; m_topBinaryExpr = 0; return res; } | |
292 | ||
293 | void appendUnaryToken(int& stackDepth, int tok, int) { stackDepth = 1; m_topUnaryToken = tok; } | |
294 | int unaryTokenStackLastType(int&) { return m_topUnaryToken; } | |
295 | JSTextPosition unaryTokenStackLastStart(int&) { return JSTextPosition(0, 0, 0); } | |
296 | void unaryTokenStackRemoveLast(int& stackDepth) { stackDepth = 0; } | |
297 | ||
298 | void assignmentStackAppend(int, int, int, int, int, Operator) { } | |
299 | int createAssignment(const JSTokenLocation&, int, int, int, int, int) { RELEASE_ASSERT_NOT_REACHED(); return AssignmentExpr; } | |
300 | const Identifier* getName(const Property& property) const { return property.name; } | |
301 | PropertyNode::Type getType(const Property& property) const { return property.type; } | |
302 | bool isResolve(ExpressionType expr) const { return expr == ResolveExpr || expr == ResolveEvalExpr; } | |
303 | ExpressionType createDestructuringAssignment(const JSTokenLocation&, int, ExpressionType) | |
304 | { | |
305 | return DestructuringAssignment; | |
306 | } | |
307 | ||
308 | ArrayPattern createArrayPattern(const JSTokenLocation&) | |
309 | { | |
310 | return ArrayDestructuring; | |
311 | } | |
312 | void appendArrayPatternSkipEntry(ArrayPattern, const JSTokenLocation&) | |
313 | { | |
314 | } | |
315 | void appendArrayPatternEntry(ArrayPattern, const JSTokenLocation&, DestructuringPattern, int) | |
316 | { | |
317 | } | |
318 | void appendArrayPatternRestEntry(ArrayPattern, const JSTokenLocation&, DestructuringPattern) | |
319 | { | |
320 | } | |
321 | void finishArrayPattern(ArrayPattern, const JSTextPosition&, const JSTextPosition&, const JSTextPosition&) | |
322 | { | |
323 | } | |
324 | ObjectPattern createObjectPattern(const JSTokenLocation&) | |
325 | { | |
326 | return ObjectDestructuring; | |
327 | } | |
328 | void appendObjectPatternEntry(ArrayPattern, const JSTokenLocation&, bool, const Identifier&, DestructuringPattern, int) | |
329 | { | |
330 | } | |
331 | DestructuringPattern createBindingLocation(const JSTokenLocation&, const Identifier&, const JSTextPosition&, const JSTextPosition&) | |
332 | { | |
333 | return BindingDestructuring; | |
334 | } | |
335 | ||
336 | bool isBindingNode(DestructuringPattern pattern) | |
337 | { | |
338 | return pattern == BindingDestructuring; | |
339 | } | |
340 | ||
341 | void setEndOffset(int, int) { } | |
342 | int endOffset(int) { return 0; } | |
343 | void setStartOffset(int, int) { } | |
344 | ||
345 | private: | |
346 | int m_topBinaryExpr; | |
347 | int m_topUnaryToken; | |
348 | Vector<int, 8> m_topBinaryExprs; | |
349 | Vector<int, 8> m_topUnaryTokens; | |
350 | }; | |
351 | ||
352 | } | |
353 | ||
354 | #endif |