1/*
2 * Copyright (C) 2010-2019 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 "BuiltinNames.h"
29#include "BytecodeIntrinsicRegistry.h"
30#include "MathCommon.h"
31#include "NodeConstructors.h"
32#include "SyntaxChecker.h"
33#include "VariableEnvironment.h"
34#include <utility>
35
36namespace JSC {
37
38class ASTBuilder {
39 struct BinaryOpInfo {
40 BinaryOpInfo() {}
41 BinaryOpInfo(const JSTextPosition& otherStart, const JSTextPosition& otherDivot, const JSTextPosition& otherEnd, bool rhsHasAssignment)
42 : start(otherStart)
43 , divot(otherDivot)
44 , end(otherEnd)
45 , hasAssignment(rhsHasAssignment)
46 {
47 }
48 BinaryOpInfo(const BinaryOpInfo& lhs, const BinaryOpInfo& rhs)
49 : start(lhs.start)
50 , divot(rhs.start)
51 , end(rhs.end)
52 , hasAssignment(lhs.hasAssignment || rhs.hasAssignment)
53 {
54 }
55 JSTextPosition start;
56 JSTextPosition divot;
57 JSTextPosition end;
58 bool hasAssignment;
59 };
60
61
62 struct AssignmentInfo {
63 AssignmentInfo() {}
64 AssignmentInfo(ExpressionNode* node, const JSTextPosition& start, const JSTextPosition& divot, int initAssignments, Operator op)
65 : m_node(node)
66 , m_start(start)
67 , m_divot(divot)
68 , m_initAssignments(initAssignments)
69 , m_op(op)
70 {
71 ASSERT(m_divot.offset >= m_divot.lineStartOffset);
72 ASSERT(m_start.offset >= m_start.lineStartOffset);
73 }
74 ExpressionNode* m_node;
75 JSTextPosition m_start;
76 JSTextPosition m_divot;
77 int m_initAssignments;
78 Operator m_op;
79 };
80public:
81 ASTBuilder(VM& vm, ParserArena& parserArena, SourceCode* sourceCode)
82 : m_vm(vm)
83 , m_parserArena(parserArena)
84 , m_sourceCode(sourceCode)
85 , m_evalCount(0)
86 {
87 }
88
89 struct BinaryExprContext {
90 BinaryExprContext(ASTBuilder&) {}
91 };
92 struct UnaryExprContext {
93 UnaryExprContext(ASTBuilder&) {}
94 };
95
96 typedef ExpressionNode* Expression;
97 typedef JSC::SourceElements* SourceElements;
98 typedef ArgumentsNode* Arguments;
99 typedef CommaNode* Comma;
100 typedef PropertyNode* Property;
101 typedef PropertyListNode* PropertyList;
102 typedef ElementNode* ElementList;
103 typedef ArgumentListNode* ArgumentsList;
104 typedef TemplateExpressionListNode* TemplateExpressionList;
105 typedef TemplateStringNode* TemplateString;
106 typedef TemplateStringListNode* TemplateStringList;
107 typedef TemplateLiteralNode* TemplateLiteral;
108 typedef FunctionParameters* FormalParameterList;
109 typedef FunctionMetadataNode* FunctionBody;
110 typedef ClassExprNode* ClassExpression;
111 typedef ModuleNameNode* ModuleName;
112 typedef ImportSpecifierNode* ImportSpecifier;
113 typedef ImportSpecifierListNode* ImportSpecifierList;
114 typedef ExportSpecifierNode* ExportSpecifier;
115 typedef ExportSpecifierListNode* ExportSpecifierList;
116 typedef StatementNode* Statement;
117 typedef ClauseListNode* ClauseList;
118 typedef CaseClauseNode* Clause;
119 typedef std::pair<ExpressionNode*, BinaryOpInfo> BinaryOperand;
120 typedef DestructuringPatternNode* DestructuringPattern;
121 typedef ArrayPatternNode* ArrayPattern;
122 typedef ObjectPatternNode* ObjectPattern;
123 typedef BindingNode* BindingPattern;
124 typedef AssignmentElementNode* AssignmentElement;
125 static constexpr bool CreatesAST = true;
126 static constexpr bool NeedsFreeVariableInfo = true;
127 static constexpr bool CanUseFunctionCache = true;
128 static constexpr OptionSet<LexerFlags> DontBuildKeywords = { };
129 static constexpr OptionSet<LexerFlags> DontBuildStrings = { };
130
131 ExpressionNode* makeBinaryNode(const JSTokenLocation&, int token, std::pair<ExpressionNode*, BinaryOpInfo>, std::pair<ExpressionNode*, BinaryOpInfo>);
132 ExpressionNode* makeFunctionCallNode(const JSTokenLocation&, ExpressionNode* func, bool previousBaseWasSuper, ArgumentsNode* args, const JSTextPosition& divotStart, const JSTextPosition& divot, const JSTextPosition& divotEnd, size_t callOrApplyChildDepth, bool isOptionalCall);
133
134 JSC::SourceElements* createSourceElements() { return new (m_parserArena) JSC::SourceElements(); }
135
136 int features() const { return m_scope.m_features; }
137 int numConstants() const { return m_scope.m_numConstants; }
138
139 ExpressionNode* makeAssignNode(const JSTokenLocation&, ExpressionNode* left, Operator, ExpressionNode* right, bool leftHasAssignments, bool rightHasAssignments, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end);
140 ExpressionNode* makePrefixNode(const JSTokenLocation&, ExpressionNode*, Operator, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end);
141 ExpressionNode* makePostfixNode(const JSTokenLocation&, ExpressionNode*, Operator, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end);
142 ExpressionNode* makeTypeOfNode(const JSTokenLocation&, ExpressionNode*);
143 ExpressionNode* makeDeleteNode(const JSTokenLocation&, ExpressionNode*, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end);
144 ExpressionNode* makeNegateNode(const JSTokenLocation&, ExpressionNode*);
145 ExpressionNode* makeBitwiseNotNode(const JSTokenLocation&, ExpressionNode*);
146 ExpressionNode* makePowNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
147 ExpressionNode* makeMultNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
148 ExpressionNode* makeDivNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
149 ExpressionNode* makeModNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
150 ExpressionNode* makeAddNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
151 ExpressionNode* makeSubNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
152 ExpressionNode* makeBitXOrNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
153 ExpressionNode* makeBitAndNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
154 ExpressionNode* makeBitOrNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
155 ExpressionNode* makeCoalesceNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right);
156 ExpressionNode* makeLeftShiftNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
157 ExpressionNode* makeRightShiftNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
158 ExpressionNode* makeURightShiftNode(const JSTokenLocation&, ExpressionNode* left, ExpressionNode* right, bool rightHasAssignments);
159
160 ExpressionNode* createLogicalNot(const JSTokenLocation& location, ExpressionNode* expr)
161 {
162 if (expr->isNumber())
163 return createBoolean(location, isZeroOrUnordered(static_cast<NumberNode*>(expr)->value()));
164
165 return new (m_parserArena) LogicalNotNode(location, expr);
166 }
167 ExpressionNode* createUnaryPlus(const JSTokenLocation& location, ExpressionNode* expr) { return new (m_parserArena) UnaryPlusNode(location, expr); }
168 ExpressionNode* createVoid(const JSTokenLocation& location, ExpressionNode* expr)
169 {
170 incConstants();
171 return new (m_parserArena) VoidNode(location, expr);
172 }
173 ExpressionNode* createThisExpr(const JSTokenLocation& location)
174 {
175 usesThis();
176 return new (m_parserArena) ThisNode(location);
177 }
178 ExpressionNode* createSuperExpr(const JSTokenLocation& location)
179 {
180 return new (m_parserArena) SuperNode(location);
181 }
182 ExpressionNode* createImportExpr(const JSTokenLocation& location, ExpressionNode* expr, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
183 {
184 auto* node = new (m_parserArena) ImportNode(location, expr);
185 setExceptionLocation(node, start, divot, end);
186 return node;
187 }
188 ExpressionNode* createNewTargetExpr(const JSTokenLocation location)
189 {
190 usesNewTarget();
191 return new (m_parserArena) NewTargetNode(location);
192 }
193 ExpressionNode* createImportMetaExpr(const JSTokenLocation& location, ExpressionNode* expr) { return new (m_parserArena) ImportMetaNode(location, expr); }
194 bool isMetaProperty(ExpressionNode* node) { return node->isMetaProperty(); }
195 bool isNewTarget(ExpressionNode* node) { return node->isNewTarget(); }
196 bool isImportMeta(ExpressionNode* node) { return node->isImportMeta(); }
197 ExpressionNode* createResolve(const JSTokenLocation& location, const Identifier& ident, const JSTextPosition& start, const JSTextPosition& end)
198 {
199 if (m_vm.propertyNames->arguments == ident)
200 usesArguments();
201
202 if (ident.isSymbol()) {
203 auto entry = m_vm.bytecodeIntrinsicRegistry().lookup(ident);
204 if (entry)
205 return new (m_parserArena) BytecodeIntrinsicNode(BytecodeIntrinsicNode::Type::Constant, location, entry.value(), ident, nullptr, start, start, end);
206 }
207
208 return new (m_parserArena) ResolveNode(location, ident, start);
209 }
210 ExpressionNode* createObjectLiteral(const JSTokenLocation& location) { return new (m_parserArena) ObjectLiteralNode(location); }
211 ExpressionNode* createObjectLiteral(const JSTokenLocation& location, PropertyListNode* properties) { return new (m_parserArena) ObjectLiteralNode(location, properties); }
212
213 ExpressionNode* createArray(const JSTokenLocation& location, int elisions)
214 {
215 if (elisions)
216 incConstants();
217 return new (m_parserArena) ArrayNode(location, elisions);
218 }
219
220 ExpressionNode* createArray(const JSTokenLocation& location, ElementNode* elems) { return new (m_parserArena) ArrayNode(location, elems); }
221 ExpressionNode* createArray(const JSTokenLocation& location, int elisions, ElementNode* elems)
222 {
223 if (elisions)
224 incConstants();
225 return new (m_parserArena) ArrayNode(location, elisions, elems);
226 }
227 ExpressionNode* createDoubleExpr(const JSTokenLocation& location, double d)
228 {
229 incConstants();
230 return new (m_parserArena) DoubleNode(location, d);
231 }
232 ExpressionNode* createIntegerExpr(const JSTokenLocation& location, double d)
233 {
234 incConstants();
235 return new (m_parserArena) IntegerNode(location, d);
236 }
237
238 ExpressionNode* createBigInt(const JSTokenLocation& location, const Identifier* bigInt, uint8_t radix)
239 {
240 incConstants();
241 return new (m_parserArena) BigIntNode(location, *bigInt, radix);
242 }
243
244 ExpressionNode* createString(const JSTokenLocation& location, const Identifier* string)
245 {
246 ASSERT(string);
247 incConstants();
248 return new (m_parserArena) StringNode(location, *string);
249 }
250
251 ExpressionNode* createBoolean(const JSTokenLocation& location, bool b)
252 {
253 incConstants();
254 return new (m_parserArena) BooleanNode(location, b);
255 }
256
257 ExpressionNode* createNull(const JSTokenLocation& location)
258 {
259 incConstants();
260 return new (m_parserArena) NullNode(location);
261 }
262
263 ExpressionNode* createBracketAccess(const JSTokenLocation& location, ExpressionNode* base, ExpressionNode* property, bool propertyHasAssignments, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
264 {
265 if (base->isSuperNode())
266 usesSuperProperty();
267
268 BracketAccessorNode* node = new (m_parserArena) BracketAccessorNode(location, base, property, propertyHasAssignments);
269 setExceptionLocation(node, start, divot, end);
270 return node;
271 }
272
273 ExpressionNode* createDotAccess(const JSTokenLocation& location, ExpressionNode* base, const Identifier* property, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
274 {
275 if (base->isSuperNode())
276 usesSuperProperty();
277
278 DotAccessorNode* node = new (m_parserArena) DotAccessorNode(location, base, *property);
279 setExceptionLocation(node, start, divot, end);
280 return node;
281 }
282
283 ExpressionNode* createSpreadExpression(const JSTokenLocation& location, ExpressionNode* expression, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
284 {
285 auto node = new (m_parserArena) SpreadExpressionNode(location, expression);
286 setExceptionLocation(node, start, divot, end);
287 return node;
288 }
289
290 ExpressionNode* createObjectSpreadExpression(const JSTokenLocation& location, ExpressionNode* expression, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
291 {
292 auto node = new (m_parserArena) ObjectSpreadExpressionNode(location, expression);
293 setExceptionLocation(node, start, divot, end);
294 return node;
295 }
296
297 TemplateStringNode* createTemplateString(const JSTokenLocation& location, const Identifier* cooked, const Identifier* raw)
298 {
299 return new (m_parserArena) TemplateStringNode(location, cooked, raw);
300 }
301
302 TemplateStringListNode* createTemplateStringList(TemplateStringNode* templateString)
303 {
304 return new (m_parserArena) TemplateStringListNode(templateString);
305 }
306
307 TemplateStringListNode* createTemplateStringList(TemplateStringListNode* templateStringList, TemplateStringNode* templateString)
308 {
309 return new (m_parserArena) TemplateStringListNode(templateStringList, templateString);
310 }
311
312 TemplateExpressionListNode* createTemplateExpressionList(ExpressionNode* expression)
313 {
314 return new (m_parserArena) TemplateExpressionListNode(expression);
315 }
316
317 TemplateExpressionListNode* createTemplateExpressionList(TemplateExpressionListNode* templateExpressionListNode, ExpressionNode* expression)
318 {
319 return new (m_parserArena) TemplateExpressionListNode(templateExpressionListNode, expression);
320 }
321
322 TemplateLiteralNode* createTemplateLiteral(const JSTokenLocation& location, TemplateStringListNode* templateStringList)
323 {
324 return new (m_parserArena) TemplateLiteralNode(location, templateStringList);
325 }
326
327 TemplateLiteralNode* createTemplateLiteral(const JSTokenLocation& location, TemplateStringListNode* templateStringList, TemplateExpressionListNode* templateExpressionList)
328 {
329 return new (m_parserArena) TemplateLiteralNode(location, templateStringList, templateExpressionList);
330 }
331
332 ExpressionNode* createTaggedTemplate(const JSTokenLocation& location, ExpressionNode* base, TemplateLiteralNode* templateLiteral, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
333 {
334 auto node = new (m_parserArena) TaggedTemplateNode(location, base, templateLiteral);
335 setExceptionLocation(node, start, divot, end);
336 setEndOffset(node, end.offset);
337 return node;
338 }
339
340 ExpressionNode* createRegExp(const JSTokenLocation& location, const Identifier& pattern, const Identifier& flags, const JSTextPosition& start)
341 {
342 if (Yarr::hasError(Yarr::checkSyntax(pattern.string(), flags.string())))
343 return 0;
344 RegExpNode* node = new (m_parserArena) RegExpNode(location, pattern, flags);
345 int size = pattern.length() + 2; // + 2 for the two /'s
346 JSTextPosition end = start + size;
347 setExceptionLocation(node, start, end, end);
348 return node;
349 }
350
351 ExpressionNode* createNewExpr(const JSTokenLocation& location, ExpressionNode* expr, ArgumentsNode* arguments, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
352 {
353 NewExprNode* node = new (m_parserArena) NewExprNode(location, expr, arguments);
354 setExceptionLocation(node, start, divot, end);
355 return node;
356 }
357
358 ExpressionNode* createNewExpr(const JSTokenLocation& location, ExpressionNode* expr, const JSTextPosition& start, const JSTextPosition& end)
359 {
360 NewExprNode* node = new (m_parserArena) NewExprNode(location, expr);
361 setExceptionLocation(node, start, end, end);
362 return node;
363 }
364
365 ExpressionNode* createOptionalChain(const JSTokenLocation& location, ExpressionNode* base, ExpressionNode* expr, bool isOutermost)
366 {
367 base->setIsOptionalChainBase();
368 return new (m_parserArena) OptionalChainNode(location, expr, isOutermost);
369 }
370
371 ExpressionNode* createConditionalExpr(const JSTokenLocation& location, ExpressionNode* condition, ExpressionNode* lhs, ExpressionNode* rhs)
372 {
373 return new (m_parserArena) ConditionalNode(location, condition, lhs, rhs);
374 }
375
376 ExpressionNode* createAssignResolve(const JSTokenLocation& location, const Identifier& ident, ExpressionNode* rhs, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end, AssignmentContext assignmentContext)
377 {
378 if (rhs->isBaseFuncExprNode()) {
379 auto metadata = static_cast<BaseFuncExprNode*>(rhs)->metadata();
380 metadata->setEcmaName(ident);
381 } else if (rhs->isClassExprNode())
382 static_cast<ClassExprNode*>(rhs)->setEcmaName(ident);
383 AssignResolveNode* node = new (m_parserArena) AssignResolveNode(location, ident, rhs, assignmentContext);
384 setExceptionLocation(node, start, divot, end);
385 return node;
386 }
387
388 YieldExprNode* createYield(const JSTokenLocation& location)
389 {
390 return new (m_parserArena) YieldExprNode(location, nullptr, /* delegate */ false);
391 }
392
393 YieldExprNode* createYield(const JSTokenLocation& location, ExpressionNode* argument, bool delegate, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
394 {
395 YieldExprNode* node = new (m_parserArena) YieldExprNode(location, argument, delegate);
396 setExceptionLocation(node, start, divot, end);
397 return node;
398 }
399
400 AwaitExprNode* createAwait(const JSTokenLocation& location, ExpressionNode* argument, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
401 {
402 ASSERT(argument);
403 AwaitExprNode* node = new (m_parserArena) AwaitExprNode(location, argument);
404 setExceptionLocation(node, start, divot, end);
405 return node;
406 }
407
408 ClassExprNode* createClassExpr(const JSTokenLocation& location, const ParserClassInfo<ASTBuilder>& classInfo, VariableEnvironment& classEnvironment, ExpressionNode* constructor,
409 ExpressionNode* parentClass, PropertyListNode* classElements)
410 {
411 SourceCode source = m_sourceCode->subExpression(classInfo.startOffset, classInfo.endOffset, classInfo.startLine, classInfo.startColumn);
412 return new (m_parserArena) ClassExprNode(location, *classInfo.className, source, classEnvironment, constructor, parentClass, classElements);
413 }
414
415 ExpressionNode* createFunctionExpr(const JSTokenLocation& location, const ParserFunctionInfo<ASTBuilder>& functionInfo)
416 {
417 FuncExprNode* result = new (m_parserArena) FuncExprNode(location, *functionInfo.name, functionInfo.body,
418 m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn));
419 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
420 return result;
421 }
422
423 ExpressionNode* createGeneratorFunctionBody(const JSTokenLocation& location, const ParserFunctionInfo<ASTBuilder>& functionInfo, const Identifier& name)
424 {
425 FuncExprNode* result = static_cast<FuncExprNode*>(createFunctionExpr(location, functionInfo));
426 if (!name.isNull())
427 result->metadata()->setEcmaName(name);
428 return result;
429 }
430
431 ExpressionNode* createAsyncFunctionBody(const JSTokenLocation& location, const ParserFunctionInfo<ASTBuilder>& functionInfo, SourceParseMode parseMode)
432 {
433 if (parseMode == SourceParseMode::AsyncArrowFunctionBodyMode) {
434 SourceCode source = m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.body->isArrowFunctionBodyExpression() ? functionInfo.endOffset - 1 : functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn);
435 FuncExprNode* result = new (m_parserArena) FuncExprNode(location, *functionInfo.name, functionInfo.body, source);
436 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
437 return result;
438 }
439 return createFunctionExpr(location, functionInfo);
440 }
441
442 ExpressionNode* createMethodDefinition(const JSTokenLocation& location, const ParserFunctionInfo<ASTBuilder>& functionInfo)
443 {
444 MethodDefinitionNode* result = new (m_parserArena) MethodDefinitionNode(location, *functionInfo.name, functionInfo.body,
445 m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn));
446 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
447 return result;
448 }
449
450 FunctionMetadataNode* createFunctionMetadata(
451 const JSTokenLocation& startLocation, const JSTokenLocation& endLocation,
452 unsigned startColumn, unsigned endColumn, int functionKeywordStart,
453 int functionNameStart, int parametersStart, bool inStrictContext,
454 ConstructorKind constructorKind, SuperBinding superBinding,
455 unsigned parameterCount,
456 SourceParseMode mode, bool isArrowFunctionBodyExpression)
457 {
458 return new (m_parserArena) FunctionMetadataNode(
459 m_parserArena, startLocation, endLocation, startColumn, endColumn,
460 functionKeywordStart, functionNameStart, parametersStart,
461 inStrictContext, constructorKind, superBinding,
462 parameterCount, mode, isArrowFunctionBodyExpression);
463 }
464
465 ExpressionNode* createArrowFunctionExpr(const JSTokenLocation& location, const ParserFunctionInfo<ASTBuilder>& functionInfo)
466 {
467 usesArrowFunction();
468 SourceCode source = m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.body->isArrowFunctionBodyExpression() ? functionInfo.endOffset - 1 : functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn);
469 ArrowFuncExprNode* result = new (m_parserArena) ArrowFuncExprNode(location, *functionInfo.name, functionInfo.body, source);
470 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
471 return result;
472 }
473
474 ArgumentsNode* createArguments() { return new (m_parserArena) ArgumentsNode(); }
475 ArgumentsNode* createArguments(ArgumentListNode* args) { return new (m_parserArena) ArgumentsNode(args); }
476 ArgumentListNode* createArgumentsList(const JSTokenLocation& location, ExpressionNode* arg) { return new (m_parserArena) ArgumentListNode(location, arg); }
477 ArgumentListNode* createArgumentsList(const JSTokenLocation& location, ArgumentListNode* args, ExpressionNode* arg) { return new (m_parserArena) ArgumentListNode(location, args, arg); }
478
479 NEVER_INLINE PropertyNode* createGetterOrSetterProperty(const JSTokenLocation& location, PropertyNode::Type type, bool,
480 const Identifier* name, const ParserFunctionInfo<ASTBuilder>& functionInfo, ClassElementTag tag)
481 {
482 ASSERT(name);
483 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
484 functionInfo.body->setEcmaName(*name);
485 SourceCode source = m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn);
486 MethodDefinitionNode* methodDef = new (m_parserArena) MethodDefinitionNode(location, m_vm.propertyNames->nullIdentifier, functionInfo.body, source);
487 return new (m_parserArena) PropertyNode(*name, methodDef, type, PropertyNode::Unknown, SuperBinding::Needed, tag);
488 }
489
490 NEVER_INLINE PropertyNode* createGetterOrSetterProperty(const JSTokenLocation& location, PropertyNode::Type type, bool,
491 ExpressionNode* name, const ParserFunctionInfo<ASTBuilder>& functionInfo, ClassElementTag tag)
492 {
493 ASSERT(name);
494 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
495 SourceCode source = m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn);
496 MethodDefinitionNode* methodDef = new (m_parserArena) MethodDefinitionNode(location, m_vm.propertyNames->nullIdentifier, functionInfo.body, source);
497 return new (m_parserArena) PropertyNode(name, methodDef, type, PropertyNode::Unknown, SuperBinding::Needed, tag);
498 }
499
500 NEVER_INLINE PropertyNode* createGetterOrSetterProperty(VM& vm, ParserArena& parserArena, const JSTokenLocation& location, PropertyNode::Type type, bool,
501 double name, const ParserFunctionInfo<ASTBuilder>& functionInfo, ClassElementTag tag)
502 {
503 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
504 const Identifier& ident = parserArena.identifierArena().makeNumericIdentifier(vm, name);
505 SourceCode source = m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn);
506 MethodDefinitionNode* methodDef = new (m_parserArena) MethodDefinitionNode(location, vm.propertyNames->nullIdentifier, functionInfo.body, source);
507 return new (m_parserArena) PropertyNode(ident, methodDef, type, PropertyNode::Unknown, SuperBinding::Needed, tag);
508 }
509
510 PropertyNode* createProperty(const Identifier* propertyName, ExpressionNode* node, PropertyNode::Type type, PropertyNode::PutType putType, bool, SuperBinding superBinding, InferName inferName, ClassElementTag tag)
511 {
512 if (inferName == InferName::Allowed) {
513 if (node->isBaseFuncExprNode()) {
514 auto metadata = static_cast<BaseFuncExprNode*>(node)->metadata();
515 metadata->setEcmaName(*propertyName);
516 } else if (node->isClassExprNode())
517 static_cast<ClassExprNode*>(node)->setEcmaName(*propertyName);
518 }
519 return new (m_parserArena) PropertyNode(*propertyName, node, type, putType, superBinding, tag);
520 }
521 PropertyNode* createProperty(ExpressionNode* node, PropertyNode::Type type, PropertyNode::PutType putType, bool, SuperBinding superBinding, ClassElementTag tag)
522 {
523 return new (m_parserArena) PropertyNode(node, type, putType, superBinding, tag);
524 }
525 PropertyNode* createProperty(VM& vm, ParserArena& parserArena, double propertyName, ExpressionNode* node, PropertyNode::Type type, PropertyNode::PutType putType, bool, SuperBinding superBinding, ClassElementTag tag)
526 {
527 return new (m_parserArena) PropertyNode(parserArena.identifierArena().makeNumericIdentifier(vm, propertyName), node, type, putType, superBinding, tag);
528 }
529 PropertyNode* createProperty(ExpressionNode* propertyName, ExpressionNode* node, PropertyNode::Type type, PropertyNode::PutType putType, bool, SuperBinding superBinding, ClassElementTag tag) { return new (m_parserArena) PropertyNode(propertyName, node, type, putType, superBinding, tag); }
530 PropertyListNode* createPropertyList(const JSTokenLocation& location, PropertyNode* property) { return new (m_parserArena) PropertyListNode(location, property); }
531 PropertyListNode* createPropertyList(const JSTokenLocation& location, PropertyNode* property, PropertyListNode* tail) { return new (m_parserArena) PropertyListNode(location, property, tail); }
532
533 ElementNode* createElementList(int elisions, ExpressionNode* expr) { return new (m_parserArena) ElementNode(elisions, expr); }
534 ElementNode* createElementList(ElementNode* elems, int elisions, ExpressionNode* expr) { return new (m_parserArena) ElementNode(elems, elisions, expr); }
535 ElementNode* createElementList(ArgumentListNode* elems)
536 {
537 ElementNode* head = new (m_parserArena) ElementNode(0, elems->m_expr);
538 ElementNode* tail = head;
539 elems = elems->m_next;
540 while (elems) {
541 tail = new (m_parserArena) ElementNode(tail, 0, elems->m_expr);
542 elems = elems->m_next;
543 }
544 return head;
545 }
546
547 FormalParameterList createFormalParameterList() { return new (m_parserArena) FunctionParameters(); }
548 void appendParameter(FormalParameterList list, DestructuringPattern pattern, ExpressionNode* defaultValue)
549 {
550 list->append(pattern, defaultValue);
551 tryInferNameInPattern(pattern, defaultValue);
552 }
553
554 CaseClauseNode* createClause(ExpressionNode* expr, JSC::SourceElements* statements) { return new (m_parserArena) CaseClauseNode(expr, statements); }
555 ClauseListNode* createClauseList(CaseClauseNode* clause) { return new (m_parserArena) ClauseListNode(clause); }
556 ClauseListNode* createClauseList(ClauseListNode* tail, CaseClauseNode* clause) { return new (m_parserArena) ClauseListNode(tail, clause); }
557
558 StatementNode* createFuncDeclStatement(const JSTokenLocation& location, const ParserFunctionInfo<ASTBuilder>& functionInfo)
559 {
560 FuncDeclNode* decl = new (m_parserArena) FuncDeclNode(location, *functionInfo.name, functionInfo.body,
561 m_sourceCode->subExpression(functionInfo.startOffset, functionInfo.endOffset, functionInfo.startLine, functionInfo.parametersStartColumn));
562 if (*functionInfo.name == m_vm.propertyNames->arguments)
563 usesArguments();
564 functionInfo.body->setLoc(functionInfo.startLine, functionInfo.endLine, location.startOffset, location.lineStartOffset);
565 return decl;
566 }
567
568 StatementNode* createClassDeclStatement(const JSTokenLocation& location, ClassExprNode* classExpression,
569 const JSTextPosition& classStart, const JSTextPosition& classEnd, unsigned startLine, unsigned endLine)
570 {
571 ExpressionNode* assign = createAssignResolve(location, classExpression->name(), classExpression, classStart, classStart + 1, classEnd, AssignmentContext::DeclarationStatement);
572 ClassDeclNode* decl = new (m_parserArena) ClassDeclNode(location, assign);
573 decl->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
574 return decl;
575 }
576
577 StatementNode* createBlockStatement(const JSTokenLocation& location, JSC::SourceElements* elements, int startLine, int endLine, VariableEnvironment& lexicalVariables, DeclarationStacks::FunctionStack&& functionStack)
578 {
579 BlockNode* block = new (m_parserArena) BlockNode(location, elements, lexicalVariables, WTFMove(functionStack));
580 block->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
581 return block;
582 }
583
584 StatementNode* createExprStatement(const JSTokenLocation& location, ExpressionNode* expr, const JSTextPosition& start, int end)
585 {
586 ExprStatementNode* result = new (m_parserArena) ExprStatementNode(location, expr);
587 result->setLoc(start.line, end, start.offset, start.lineStartOffset);
588 return result;
589 }
590
591 StatementNode* createIfStatement(const JSTokenLocation& location, ExpressionNode* condition, StatementNode* trueBlock, StatementNode* falseBlock, int start, int end)
592 {
593 IfElseNode* result = new (m_parserArena) IfElseNode(location, condition, trueBlock, falseBlock);
594 result->setLoc(start, end, location.startOffset, location.lineStartOffset);
595 return result;
596 }
597
598 StatementNode* createForLoop(const JSTokenLocation& location, ExpressionNode* initializer, ExpressionNode* condition, ExpressionNode* iter, StatementNode* statements, int start, int end, VariableEnvironment& lexicalVariables)
599 {
600 ForNode* result = new (m_parserArena) ForNode(location, initializer, condition, iter, statements, lexicalVariables);
601 result->setLoc(start, end, location.startOffset, location.lineStartOffset);
602 return result;
603 }
604
605 StatementNode* createForInLoop(const JSTokenLocation& location, ExpressionNode* lhs, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation&, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
606 {
607 ForInNode* result = new (m_parserArena) ForInNode(location, lhs, iter, statements, lexicalVariables);
608 result->setLoc(start, end, location.startOffset, location.lineStartOffset);
609 setExceptionLocation(result, eStart, eDivot, eEnd);
610 return result;
611 }
612
613 StatementNode* createForInLoop(const JSTokenLocation& location, DestructuringPatternNode* pattern, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation& declLocation, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
614 {
615 auto lexpr = new (m_parserArena) DestructuringAssignmentNode(declLocation, pattern, nullptr);
616 return createForInLoop(location, lexpr, iter, statements, declLocation, eStart, eDivot, eEnd, start, end, lexicalVariables);
617 }
618
619 StatementNode* createForOfLoop(bool isForAwait, const JSTokenLocation& location, ExpressionNode* lhs, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation&, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
620 {
621 ForOfNode* result = new (m_parserArena) ForOfNode(isForAwait, location, lhs, iter, statements, lexicalVariables);
622 result->setLoc(start, end, location.startOffset, location.lineStartOffset);
623 setExceptionLocation(result, eStart, eDivot, eEnd);
624 return result;
625 }
626
627 StatementNode* createForOfLoop(bool isForAwait, const JSTokenLocation& location, DestructuringPatternNode* pattern, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation& declLocation, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
628 {
629 auto lexpr = new (m_parserArena) DestructuringAssignmentNode(declLocation, pattern, nullptr);
630 return createForOfLoop(isForAwait, location, lexpr, iter, statements, declLocation, eStart, eDivot, eEnd, start, end, lexicalVariables);
631 }
632
633 bool isBindingNode(const DestructuringPattern& pattern)
634 {
635 return pattern->isBindingNode();
636 }
637
638 bool isLocation(const Expression& node)
639 {
640 return node->isLocation();
641 }
642
643 bool isAssignmentLocation(const Expression& node)
644 {
645 return node->isAssignmentLocation();
646 }
647
648 bool isObjectLiteral(const Expression& node)
649 {
650 return node->isObjectLiteral();
651 }
652
653 bool isArrayLiteral(const Expression& node)
654 {
655 return node->isArrayLiteral();
656 }
657
658 bool isObjectOrArrayLiteral(const Expression& node)
659 {
660 return isObjectLiteral(node) || isArrayLiteral(node);
661 }
662
663 bool isFunctionCall(const Expression& node)
664 {
665 return node->isFunctionCall();
666 }
667
668 bool shouldSkipPauseLocation(StatementNode* statement) const
669 {
670 return !statement || statement->isLabel();
671 }
672
673 StatementNode* createEmptyStatement(const JSTokenLocation& location) { return new (m_parserArena) EmptyStatementNode(location); }
674
675 StatementNode* createDeclarationStatement(const JSTokenLocation& location, ExpressionNode* expr, int start, int end)
676 {
677 StatementNode* result;
678 result = new (m_parserArena) DeclarationStatement(location, expr);
679 result->setLoc(start, end, location.startOffset, location.lineStartOffset);
680 return result;
681 }
682
683 ExpressionNode* createEmptyVarExpression(const JSTokenLocation& location, const Identifier& identifier)
684 {
685 return new (m_parserArena) EmptyVarExpression(location, identifier);
686 }
687
688 ExpressionNode* createEmptyLetExpression(const JSTokenLocation& location, const Identifier& identifier)
689 {
690 return new (m_parserArena) EmptyLetExpression(location, identifier);
691 }
692
693 StatementNode* createReturnStatement(const JSTokenLocation& location, ExpressionNode* expression, const JSTextPosition& start, const JSTextPosition& end)
694 {
695 ReturnNode* result = new (m_parserArena) ReturnNode(location, expression);
696 setExceptionLocation(result, start, end, end);
697 result->setLoc(start.line, end.line, start.offset, start.lineStartOffset);
698 return result;
699 }
700
701 StatementNode* createBreakStatement(const JSTokenLocation& location, const Identifier* ident, const JSTextPosition& start, const JSTextPosition& end)
702 {
703 BreakNode* result = new (m_parserArena) BreakNode(location, *ident);
704 setExceptionLocation(result, start, end, end);
705 result->setLoc(start.line, end.line, start.offset, start.lineStartOffset);
706 return result;
707 }
708
709 StatementNode* createContinueStatement(const JSTokenLocation& location, const Identifier* ident, const JSTextPosition& start, const JSTextPosition& end)
710 {
711 ContinueNode* result = new (m_parserArena) ContinueNode(location, *ident);
712 setExceptionLocation(result, start, end, end);
713 result->setLoc(start.line, end.line, start.offset, start.lineStartOffset);
714 return result;
715 }
716
717 StatementNode* createTryStatement(const JSTokenLocation& location, StatementNode* tryBlock, DestructuringPatternNode* catchPattern, StatementNode* catchBlock, StatementNode* finallyBlock, int startLine, int endLine, VariableEnvironment& catchEnvironment)
718 {
719 TryNode* result = new (m_parserArena) TryNode(location, tryBlock, catchPattern, catchBlock, catchEnvironment, finallyBlock);
720 result->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
721 return result;
722 }
723
724 StatementNode* createSwitchStatement(const JSTokenLocation& location, ExpressionNode* expr, ClauseListNode* firstClauses, CaseClauseNode* defaultClause, ClauseListNode* secondClauses, int startLine, int endLine, VariableEnvironment& lexicalVariables, DeclarationStacks::FunctionStack&& functionStack)
725 {
726 CaseBlockNode* cases = new (m_parserArena) CaseBlockNode(firstClauses, defaultClause, secondClauses);
727 SwitchNode* result = new (m_parserArena) SwitchNode(location, expr, cases, lexicalVariables, WTFMove(functionStack));
728 result->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
729 return result;
730 }
731
732 StatementNode* createWhileStatement(const JSTokenLocation& location, ExpressionNode* expr, StatementNode* statement, int startLine, int endLine)
733 {
734 WhileNode* result = new (m_parserArena) WhileNode(location, expr, statement);
735 result->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
736 return result;
737 }
738
739 StatementNode* createDoWhileStatement(const JSTokenLocation& location, StatementNode* statement, ExpressionNode* expr, int startLine, int endLine)
740 {
741 DoWhileNode* result = new (m_parserArena) DoWhileNode(location, statement, expr);
742 result->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
743 return result;
744 }
745
746 StatementNode* createLabelStatement(const JSTokenLocation& location, const Identifier* ident, StatementNode* statement, const JSTextPosition& start, const JSTextPosition& end)
747 {
748 LabelNode* result = new (m_parserArena) LabelNode(location, *ident, statement);
749 setExceptionLocation(result, start, end, end);
750 return result;
751 }
752
753 StatementNode* createWithStatement(const JSTokenLocation& location, ExpressionNode* expr, StatementNode* statement, unsigned start, const JSTextPosition& end, unsigned startLine, unsigned endLine)
754 {
755 usesWith();
756 WithNode* result = new (m_parserArena) WithNode(location, expr, statement, end, end - start);
757 result->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
758 return result;
759 }
760
761 StatementNode* createThrowStatement(const JSTokenLocation& location, ExpressionNode* expr, const JSTextPosition& start, const JSTextPosition& end)
762 {
763 ThrowNode* result = new (m_parserArena) ThrowNode(location, expr);
764 result->setLoc(start.line, end.line, start.offset, start.lineStartOffset);
765 setExceptionLocation(result, start, end, end);
766 return result;
767 }
768
769 StatementNode* createDebugger(const JSTokenLocation& location, int startLine, int endLine)
770 {
771 DebuggerStatementNode* result = new (m_parserArena) DebuggerStatementNode(location);
772 result->setLoc(startLine, endLine, location.startOffset, location.lineStartOffset);
773 return result;
774 }
775
776 ModuleNameNode* createModuleName(const JSTokenLocation& location, const Identifier& moduleName)
777 {
778 return new (m_parserArena) ModuleNameNode(location, moduleName);
779 }
780
781 ImportSpecifierNode* createImportSpecifier(const JSTokenLocation& location, const Identifier& importedName, const Identifier& localName)
782 {
783 return new (m_parserArena) ImportSpecifierNode(location, importedName, localName);
784 }
785
786 ImportSpecifierListNode* createImportSpecifierList()
787 {
788 return new (m_parserArena) ImportSpecifierListNode();
789 }
790
791 void appendImportSpecifier(ImportSpecifierListNode* specifierList, ImportSpecifierNode* specifier)
792 {
793 specifierList->append(specifier);
794 }
795
796 StatementNode* createImportDeclaration(const JSTokenLocation& location, ImportSpecifierListNode* importSpecifierList, ModuleNameNode* moduleName)
797 {
798 return new (m_parserArena) ImportDeclarationNode(location, importSpecifierList, moduleName);
799 }
800
801 StatementNode* createExportAllDeclaration(const JSTokenLocation& location, ModuleNameNode* moduleName)
802 {
803 return new (m_parserArena) ExportAllDeclarationNode(location, moduleName);
804 }
805
806 StatementNode* createExportDefaultDeclaration(const JSTokenLocation& location, StatementNode* declaration, const Identifier& localName)
807 {
808 return new (m_parserArena) ExportDefaultDeclarationNode(location, declaration, localName);
809 }
810
811 StatementNode* createExportLocalDeclaration(const JSTokenLocation& location, StatementNode* declaration)
812 {
813 return new (m_parserArena) ExportLocalDeclarationNode(location, declaration);
814 }
815
816 StatementNode* createExportNamedDeclaration(const JSTokenLocation& location, ExportSpecifierListNode* exportSpecifierList, ModuleNameNode* moduleName)
817 {
818 return new (m_parserArena) ExportNamedDeclarationNode(location, exportSpecifierList, moduleName);
819 }
820
821 ExportSpecifierNode* createExportSpecifier(const JSTokenLocation& location, const Identifier& localName, const Identifier& exportedName)
822 {
823 return new (m_parserArena) ExportSpecifierNode(location, localName, exportedName);
824 }
825
826 ExportSpecifierListNode* createExportSpecifierList()
827 {
828 return new (m_parserArena) ExportSpecifierListNode();
829 }
830
831 void appendExportSpecifier(ExportSpecifierListNode* specifierList, ExportSpecifierNode* specifier)
832 {
833 specifierList->append(specifier);
834 }
835
836 void appendStatement(JSC::SourceElements* elements, JSC::StatementNode* statement)
837 {
838 elements->append(statement);
839 }
840
841 CommaNode* createCommaExpr(const JSTokenLocation& location, ExpressionNode* node)
842 {
843 return new (m_parserArena) CommaNode(location, node);
844 }
845
846 CommaNode* appendToCommaExpr(const JSTokenLocation& location, ExpressionNode*, ExpressionNode* tail, ExpressionNode* next)
847 {
848 ASSERT(tail->isCommaNode());
849 ASSERT(next);
850 CommaNode* newTail = new (m_parserArena) CommaNode(location, next);
851 static_cast<CommaNode*>(tail)->setNext(newTail);
852 return newTail;
853 }
854
855 int evalCount() const { return m_evalCount; }
856
857 void appendBinaryExpressionInfo(int& operandStackDepth, ExpressionNode* current, const JSTextPosition& exprStart, const JSTextPosition& lhs, const JSTextPosition& rhs, bool hasAssignments)
858 {
859 operandStackDepth++;
860 m_binaryOperandStack.append(std::make_pair(current, BinaryOpInfo(exprStart, lhs, rhs, hasAssignments)));
861 }
862
863 // Logic to handle datastructures used during parsing of binary expressions
864 void operatorStackPop(int& operatorStackDepth)
865 {
866 operatorStackDepth--;
867 m_binaryOperatorStack.removeLast();
868 }
869 bool operatorStackShouldReduce(int precedence)
870 {
871 // If the current precedence of the operator stack is the same to the one of the given operator,
872 // it depends on the associative whether we reduce the stack.
873 // If the operator is right associative, we should not reduce the stack right now.
874 if (precedence == m_binaryOperatorStack.last().second)
875 return !(m_binaryOperatorStack.last().first & RightAssociativeBinaryOpTokenFlag);
876 return precedence < m_binaryOperatorStack.last().second;
877 }
878 const BinaryOperand& getFromOperandStack(int i) { return m_binaryOperandStack[m_binaryOperandStack.size() + i]; }
879 void shrinkOperandStackBy(int& operandStackDepth, int amount)
880 {
881 operandStackDepth -= amount;
882 ASSERT(operandStackDepth >= 0);
883 m_binaryOperandStack.shrink(m_binaryOperandStack.size() - amount);
884 }
885 void appendBinaryOperation(const JSTokenLocation& location, int& operandStackDepth, int&, const BinaryOperand& lhs, const BinaryOperand& rhs)
886 {
887 operandStackDepth++;
888 m_binaryOperandStack.append(std::make_pair(makeBinaryNode(location, m_binaryOperatorStack.last().first, lhs, rhs), BinaryOpInfo(lhs.second, rhs.second)));
889 }
890 void operatorStackAppend(int& operatorStackDepth, int op, int precedence)
891 {
892 operatorStackDepth++;
893 m_binaryOperatorStack.append(std::make_pair(op, precedence));
894 }
895 ExpressionNode* popOperandStack(int&)
896 {
897 ExpressionNode* result = m_binaryOperandStack.last().first;
898 m_binaryOperandStack.removeLast();
899 return result;
900 }
901
902 void appendUnaryToken(int& tokenStackDepth, int type, const JSTextPosition& start)
903 {
904 tokenStackDepth++;
905 m_unaryTokenStack.append(std::make_pair(type, start));
906 }
907
908 int unaryTokenStackLastType(int&)
909 {
910 return m_unaryTokenStack.last().first;
911 }
912
913 const JSTextPosition& unaryTokenStackLastStart(int&)
914 {
915 return m_unaryTokenStack.last().second;
916 }
917
918 void unaryTokenStackRemoveLast(int& tokenStackDepth)
919 {
920 tokenStackDepth--;
921 m_unaryTokenStack.removeLast();
922 }
923
924 void assignmentStackAppend(int& assignmentStackDepth, ExpressionNode* node, const JSTextPosition& start, const JSTextPosition& divot, int assignmentCount, Operator op)
925 {
926 assignmentStackDepth++;
927 ASSERT(start.offset >= start.lineStartOffset);
928 ASSERT(divot.offset >= divot.lineStartOffset);
929 m_assignmentInfoStack.append(AssignmentInfo(node, start, divot, assignmentCount, op));
930 }
931
932 ExpressionNode* createAssignment(const JSTokenLocation& location, int& assignmentStackDepth, ExpressionNode* rhs, int initialAssignmentCount, int currentAssignmentCount, const JSTextPosition& lastTokenEnd)
933 {
934 AssignmentInfo& info = m_assignmentInfoStack.last();
935 ExpressionNode* result = makeAssignNode(location, info.m_node, info.m_op, rhs, info.m_initAssignments != initialAssignmentCount, info.m_initAssignments != currentAssignmentCount, info.m_start, info.m_divot + 1, lastTokenEnd);
936 m_assignmentInfoStack.removeLast();
937 assignmentStackDepth--;
938 return result;
939 }
940
941 const Identifier* getName(const Property& property) const { return property->name(); }
942 PropertyNode::Type getType(const Property& property) const { return property->type(); }
943
944 bool isResolve(ExpressionNode* expr) const { return expr->isResolveNode(); }
945
946 ExpressionNode* createDestructuringAssignment(const JSTokenLocation& location, DestructuringPattern pattern, ExpressionNode* initializer)
947 {
948 return new (m_parserArena) DestructuringAssignmentNode(location, pattern, initializer);
949 }
950
951 ArrayPattern createArrayPattern(const JSTokenLocation&)
952 {
953 return new (m_parserArena) ArrayPatternNode();
954 }
955
956 void appendArrayPatternSkipEntry(ArrayPattern node, const JSTokenLocation& location)
957 {
958 node->appendIndex(ArrayPatternNode::BindingType::Elision, location, 0, nullptr);
959 }
960
961 void appendArrayPatternEntry(ArrayPattern node, const JSTokenLocation& location, DestructuringPattern pattern, ExpressionNode* defaultValue)
962 {
963 node->appendIndex(ArrayPatternNode::BindingType::Element, location, pattern, defaultValue);
964 tryInferNameInPattern(pattern, defaultValue);
965 }
966
967 void appendArrayPatternRestEntry(ArrayPattern node, const JSTokenLocation& location, DestructuringPattern pattern)
968 {
969 node->appendIndex(ArrayPatternNode::BindingType::RestElement, location, pattern, nullptr);
970 }
971
972 void finishArrayPattern(ArrayPattern node, const JSTextPosition& divotStart, const JSTextPosition& divot, const JSTextPosition& divotEnd)
973 {
974 setExceptionLocation(node, divotStart, divot, divotEnd);
975 }
976
977 ObjectPattern createObjectPattern(const JSTokenLocation&)
978 {
979 return new (m_parserArena) ObjectPatternNode();
980 }
981
982 void appendObjectPatternEntry(ObjectPattern node, const JSTokenLocation& location, bool wasString, const Identifier& identifier, DestructuringPattern pattern, ExpressionNode* defaultValue)
983 {
984 node->appendEntry(location, identifier, wasString, pattern, defaultValue, ObjectPatternNode::BindingType::Element);
985 tryInferNameInPattern(pattern, defaultValue);
986 }
987
988 void appendObjectPatternEntry(VM& vm, ObjectPattern node, const JSTokenLocation& location, ExpressionNode* propertyExpression, DestructuringPattern pattern, ExpressionNode* defaultValue)
989 {
990 node->appendEntry(vm, location, propertyExpression, pattern, defaultValue, ObjectPatternNode::BindingType::Element);
991 tryInferNameInPattern(pattern, defaultValue);
992 }
993
994 void appendObjectPatternRestEntry(VM& vm, ObjectPattern node, const JSTokenLocation& location, DestructuringPattern pattern)
995 {
996 node->appendEntry(vm, location, nullptr, pattern, nullptr, ObjectPatternNode::BindingType::RestElement);
997 }
998
999 void setContainsObjectRestElement(ObjectPattern node, bool containsRestElement)
1000 {
1001 node->setContainsRestElement(containsRestElement);
1002 }
1003
1004 void setContainsComputedProperty(ObjectPattern node, bool containsComputedProperty)
1005 {
1006 node->setContainsComputedProperty(containsComputedProperty);
1007 }
1008
1009 BindingPattern createBindingLocation(const JSTokenLocation&, const Identifier& boundProperty, const JSTextPosition& start, const JSTextPosition& end, AssignmentContext context)
1010 {
1011 return new (m_parserArena) BindingNode(boundProperty, start, end, context);
1012 }
1013
1014 RestParameterNode* createRestParameter(DestructuringPatternNode* pattern, size_t numParametersToSkip)
1015 {
1016 return new (m_parserArena) RestParameterNode(pattern, numParametersToSkip);
1017 }
1018
1019 AssignmentElement createAssignmentElement(const Expression& assignmentTarget, const JSTextPosition& start, const JSTextPosition& end)
1020 {
1021 return new (m_parserArena) AssignmentElementNode(assignmentTarget, start, end);
1022 }
1023
1024 void setEndOffset(Node* node, int offset)
1025 {
1026 node->setEndOffset(offset);
1027 }
1028
1029 int endOffset(Node* node)
1030 {
1031 return node->endOffset();
1032 }
1033
1034 void setStartOffset(CaseClauseNode* node, int offset)
1035 {
1036 node->setStartOffset(offset);
1037 }
1038
1039 void setStartOffset(Node* node, int offset)
1040 {
1041 node->setStartOffset(offset);
1042 }
1043
1044 JSTextPosition breakpointLocation(Node* node)
1045 {
1046 node->setNeedsDebugHook();
1047 return node->position();
1048 }
1049
1050 void propagateArgumentsUse() { usesArguments(); }
1051
1052private:
1053 struct Scope {
1054 Scope()
1055 : m_features(0)
1056 , m_numConstants(0)
1057 {
1058 }
1059 int m_features;
1060 int m_numConstants;
1061 };
1062
1063 static void setExceptionLocation(ThrowableExpressionData* node, const JSTextPosition& divotStart, const JSTextPosition& divot, const JSTextPosition& divotEnd)
1064 {
1065 ASSERT(divot.offset >= divot.lineStartOffset);
1066 node->setExceptionSourceCode(divot, divotStart, divotEnd);
1067 }
1068
1069 void incConstants() { m_scope.m_numConstants++; }
1070 void usesThis() { m_scope.m_features |= ThisFeature; }
1071 void usesArrowFunction() { m_scope.m_features |= ArrowFunctionFeature; }
1072 void usesArguments() { m_scope.m_features |= ArgumentsFeature; }
1073 void usesWith() { m_scope.m_features |= WithFeature; }
1074 void usesSuperCall() { m_scope.m_features |= SuperCallFeature; }
1075 void usesSuperProperty() { m_scope.m_features |= SuperPropertyFeature; }
1076 void usesEval()
1077 {
1078 m_evalCount++;
1079 m_scope.m_features |= EvalFeature;
1080 }
1081 void usesNewTarget() { m_scope.m_features |= NewTargetFeature; }
1082 ExpressionNode* createIntegerLikeNumber(const JSTokenLocation& location, double d)
1083 {
1084 return new (m_parserArena) IntegerNode(location, d);
1085 }
1086 ExpressionNode* createDoubleLikeNumber(const JSTokenLocation& location, double d)
1087 {
1088 return new (m_parserArena) DoubleNode(location, d);
1089 }
1090 ExpressionNode* createBigIntWithSign(const JSTokenLocation& location, const Identifier& bigInt, uint8_t radix, bool sign)
1091 {
1092 return new (m_parserArena) BigIntNode(location, bigInt, radix, sign);
1093 }
1094 ExpressionNode* createNumberFromBinaryOperation(const JSTokenLocation& location, double value, const NumberNode& originalNodeA, const NumberNode& originalNodeB)
1095 {
1096 if (originalNodeA.isIntegerNode() && originalNodeB.isIntegerNode())
1097 return createIntegerLikeNumber(location, value);
1098 return createDoubleLikeNumber(location, value);
1099 }
1100 ExpressionNode* createNumberFromUnaryOperation(const JSTokenLocation& location, double value, const NumberNode& originalNode)
1101 {
1102 if (originalNode.isIntegerNode())
1103 return createIntegerLikeNumber(location, value);
1104 return createDoubleLikeNumber(location, value);
1105 }
1106 ExpressionNode* createBigIntFromUnaryOperation(const JSTokenLocation& location, bool sign, const BigIntNode& originalNode)
1107 {
1108 return createBigIntWithSign(location, originalNode.identifier(), originalNode.radix(), sign);
1109 }
1110
1111 void tryInferNameInPattern(DestructuringPattern pattern, ExpressionNode* defaultValue)
1112 {
1113 if (!defaultValue)
1114 return;
1115
1116 if (pattern->isBindingNode()) {
1117 const Identifier& ident = static_cast<BindingNode*>(pattern)->boundProperty();
1118 tryInferNameInPatternWithIdentifier(ident, defaultValue);
1119 } else if (pattern->isAssignmentElementNode()) {
1120 const ExpressionNode* assignmentTarget = static_cast<AssignmentElementNode*>(pattern)->assignmentTarget();
1121 if (assignmentTarget->isResolveNode()) {
1122 const Identifier& ident = static_cast<const ResolveNode*>(assignmentTarget)->identifier();
1123 tryInferNameInPatternWithIdentifier(ident, defaultValue);
1124 }
1125 }
1126 }
1127
1128 void tryInferNameInPatternWithIdentifier(const Identifier& ident, ExpressionNode* defaultValue)
1129 {
1130 if (defaultValue->isBaseFuncExprNode()) {
1131 auto metadata = static_cast<BaseFuncExprNode*>(defaultValue)->metadata();
1132 metadata->setEcmaName(ident);
1133 } else if (defaultValue->isClassExprNode())
1134 static_cast<ClassExprNode*>(defaultValue)->setEcmaName(ident);
1135 }
1136
1137 VM& m_vm;
1138 ParserArena& m_parserArena;
1139 SourceCode* m_sourceCode;
1140 Scope m_scope;
1141 Vector<BinaryOperand, 10, UnsafeVectorOverflow> m_binaryOperandStack;
1142 Vector<AssignmentInfo, 10, UnsafeVectorOverflow> m_assignmentInfoStack;
1143 Vector<std::pair<int, int>, 10, UnsafeVectorOverflow> m_binaryOperatorStack;
1144 Vector<std::pair<int, JSTextPosition>, 10, UnsafeVectorOverflow> m_unaryTokenStack;
1145 int m_evalCount;
1146};
1147
1148ExpressionNode* ASTBuilder::makeTypeOfNode(const JSTokenLocation& location, ExpressionNode* expr)
1149{
1150 if (expr->isResolveNode()) {
1151 ResolveNode* resolve = static_cast<ResolveNode*>(expr);
1152 return new (m_parserArena) TypeOfResolveNode(location, resolve->identifier());
1153 }
1154 return new (m_parserArena) TypeOfValueNode(location, expr);
1155}
1156
1157ExpressionNode* ASTBuilder::makeDeleteNode(const JSTokenLocation& location, ExpressionNode* expr, const JSTextPosition& start, const JSTextPosition& divot, const JSTextPosition& end)
1158{
1159 if (expr->isOptionalChain()) {
1160 OptionalChainNode* optionalChain = static_cast<OptionalChainNode*>(expr);
1161 if (optionalChain->expr()->isLocation()) {
1162 ASSERT(!optionalChain->expr()->isResolveNode());
1163 optionalChain->setExpr(makeDeleteNode(location, optionalChain->expr(), start, divot, end));
1164 return optionalChain;
1165 }
1166 }
1167
1168 if (!expr->isLocation())
1169 return new (m_parserArena) DeleteValueNode(location, expr);
1170 if (expr->isResolveNode()) {
1171 ResolveNode* resolve = static_cast<ResolveNode*>(expr);
1172 return new (m_parserArena) DeleteResolveNode(location, resolve->identifier(), divot, start, end);
1173 }
1174 if (expr->isBracketAccessorNode()) {
1175 BracketAccessorNode* bracket = static_cast<BracketAccessorNode*>(expr);
1176 return new (m_parserArena) DeleteBracketNode(location, bracket->base(), bracket->subscript(), divot, start, end);
1177 }
1178 ASSERT(expr->isDotAccessorNode());
1179 DotAccessorNode* dot = static_cast<DotAccessorNode*>(expr);
1180 return new (m_parserArena) DeleteDotNode(location, dot->base(), dot->identifier(), divot, start, end);
1181}
1182
1183ExpressionNode* ASTBuilder::makeNegateNode(const JSTokenLocation& location, ExpressionNode* n)
1184{
1185 if (n->isNumber()) {
1186 const NumberNode& numberNode = static_cast<const NumberNode&>(*n);
1187 return createNumberFromUnaryOperation(location, -numberNode.value(), numberNode);
1188 }
1189
1190 if (n->isBigInt()) {
1191 const BigIntNode& bigIntNode = static_cast<const BigIntNode&>(*n);
1192 return createBigIntFromUnaryOperation(location, !bigIntNode.sign(), bigIntNode);
1193 }
1194
1195 return new (m_parserArena) NegateNode(location, n);
1196}
1197
1198ExpressionNode* ASTBuilder::makeBitwiseNotNode(const JSTokenLocation& location, ExpressionNode* expr)
1199{
1200 if (expr->isNumber())
1201 return createIntegerLikeNumber(location, ~toInt32(static_cast<NumberNode*>(expr)->value()));
1202 return new (m_parserArena) BitwiseNotNode(location, expr);
1203}
1204
1205ExpressionNode* ASTBuilder::makePowNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1206{
1207 auto* strippedExpr1 = expr1->stripUnaryPlus();
1208 auto* strippedExpr2 = expr2->stripUnaryPlus();
1209
1210 if (strippedExpr1->isNumber() && strippedExpr2->isNumber()) {
1211 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*strippedExpr1);
1212 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*strippedExpr2);
1213 return createNumberFromBinaryOperation(location, operationMathPow(numberExpr1.value(), numberExpr2.value()), numberExpr1, numberExpr2);
1214 }
1215
1216 if (strippedExpr1->isNumber())
1217 expr1 = strippedExpr1;
1218 if (strippedExpr2->isNumber())
1219 expr2 = strippedExpr2;
1220
1221 return new (m_parserArena) PowNode(location, expr1, expr2, rightHasAssignments);
1222}
1223
1224ExpressionNode* ASTBuilder::makeMultNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1225{
1226 // FIXME: Unary + change the evaluation order.
1227 // https://bugs.webkit.org/show_bug.cgi?id=159968
1228 expr1 = expr1->stripUnaryPlus();
1229 expr2 = expr2->stripUnaryPlus();
1230
1231 if (expr1->isNumber() && expr2->isNumber()) {
1232 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1233 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1234 return createNumberFromBinaryOperation(location, numberExpr1.value() * numberExpr2.value(), numberExpr1, numberExpr2);
1235 }
1236
1237 if (expr1->isNumber() && static_cast<NumberNode*>(expr1)->value() == 1)
1238 return new (m_parserArena) UnaryPlusNode(location, expr2);
1239
1240 if (expr2->isNumber() && static_cast<NumberNode*>(expr2)->value() == 1)
1241 return new (m_parserArena) UnaryPlusNode(location, expr1);
1242
1243 return new (m_parserArena) MultNode(location, expr1, expr2, rightHasAssignments);
1244}
1245
1246ExpressionNode* ASTBuilder::makeDivNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1247{
1248 // FIXME: Unary + change the evaluation order.
1249 // https://bugs.webkit.org/show_bug.cgi?id=159968
1250 expr1 = expr1->stripUnaryPlus();
1251 expr2 = expr2->stripUnaryPlus();
1252
1253 if (expr1->isNumber() && expr2->isNumber()) {
1254 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1255 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1256 double result = numberExpr1.value() / numberExpr2.value();
1257 if (static_cast<int64_t>(result) == result)
1258 return createNumberFromBinaryOperation(location, result, numberExpr1, numberExpr2);
1259 return createDoubleLikeNumber(location, result);
1260 }
1261 return new (m_parserArena) DivNode(location, expr1, expr2, rightHasAssignments);
1262}
1263
1264ExpressionNode* ASTBuilder::makeModNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1265{
1266 // FIXME: Unary + change the evaluation order.
1267 // https://bugs.webkit.org/show_bug.cgi?id=159968
1268 expr1 = expr1->stripUnaryPlus();
1269 expr2 = expr2->stripUnaryPlus();
1270
1271 if (expr1->isNumber() && expr2->isNumber()) {
1272 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1273 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1274 return createIntegerLikeNumber(location, fmod(numberExpr1.value(), numberExpr2.value()));
1275 }
1276 return new (m_parserArena) ModNode(location, expr1, expr2, rightHasAssignments);
1277}
1278
1279ExpressionNode* ASTBuilder::makeAddNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1280{
1281
1282 if (expr1->isNumber() && expr2->isNumber()) {
1283 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1284 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1285 return createNumberFromBinaryOperation(location, numberExpr1.value() + numberExpr2.value(), numberExpr1, numberExpr2);
1286 }
1287 return new (m_parserArena) AddNode(location, expr1, expr2, rightHasAssignments);
1288}
1289
1290ExpressionNode* ASTBuilder::makeSubNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1291{
1292 // FIXME: Unary + change the evaluation order.
1293 // https://bugs.webkit.org/show_bug.cgi?id=159968
1294 expr1 = expr1->stripUnaryPlus();
1295 expr2 = expr2->stripUnaryPlus();
1296
1297 if (expr1->isNumber() && expr2->isNumber()) {
1298 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1299 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1300 return createNumberFromBinaryOperation(location, numberExpr1.value() - numberExpr2.value(), numberExpr1, numberExpr2);
1301 }
1302 return new (m_parserArena) SubNode(location, expr1, expr2, rightHasAssignments);
1303}
1304
1305ExpressionNode* ASTBuilder::makeLeftShiftNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1306{
1307 if (expr1->isNumber() && expr2->isNumber()) {
1308 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1309 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1310 return createIntegerLikeNumber(location, toInt32(numberExpr1.value()) << (toUInt32(numberExpr2.value()) & 0x1f));
1311 }
1312 return new (m_parserArena) LeftShiftNode(location, expr1, expr2, rightHasAssignments);
1313}
1314
1315ExpressionNode* ASTBuilder::makeRightShiftNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1316{
1317 if (expr1->isNumber() && expr2->isNumber()) {
1318 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1319 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1320 return createIntegerLikeNumber(location, toInt32(numberExpr1.value()) >> (toUInt32(numberExpr2.value()) & 0x1f));
1321 }
1322 return new (m_parserArena) RightShiftNode(location, expr1, expr2, rightHasAssignments);
1323}
1324
1325ExpressionNode* ASTBuilder::makeURightShiftNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1326{
1327 if (expr1->isNumber() && expr2->isNumber()) {
1328 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1329 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1330 return createIntegerLikeNumber(location, toUInt32(numberExpr1.value()) >> (toUInt32(numberExpr2.value()) & 0x1f));
1331 }
1332 return new (m_parserArena) UnsignedRightShiftNode(location, expr1, expr2, rightHasAssignments);
1333}
1334
1335ExpressionNode* ASTBuilder::makeBitOrNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1336{
1337 if (expr1->isNumber() && expr2->isNumber()) {
1338 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1339 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1340 return createIntegerLikeNumber(location, toInt32(numberExpr1.value()) | toInt32(numberExpr2.value()));
1341 }
1342 return new (m_parserArena) BitOrNode(location, expr1, expr2, rightHasAssignments);
1343}
1344
1345ExpressionNode* ASTBuilder::makeBitAndNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1346{
1347 if (expr1->isNumber() && expr2->isNumber()) {
1348 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1349 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1350 return createIntegerLikeNumber(location, toInt32(numberExpr1.value()) & toInt32(numberExpr2.value()));
1351 }
1352 return new (m_parserArena) BitAndNode(location, expr1, expr2, rightHasAssignments);
1353}
1354
1355ExpressionNode* ASTBuilder::makeBitXOrNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2, bool rightHasAssignments)
1356{
1357 if (expr1->isNumber() && expr2->isNumber()) {
1358 const NumberNode& numberExpr1 = static_cast<NumberNode&>(*expr1);
1359 const NumberNode& numberExpr2 = static_cast<NumberNode&>(*expr2);
1360 return createIntegerLikeNumber(location, toInt32(numberExpr1.value()) ^ toInt32(numberExpr2.value()));
1361 }
1362 return new (m_parserArena) BitXOrNode(location, expr1, expr2, rightHasAssignments);
1363}
1364
1365ExpressionNode* ASTBuilder::makeCoalesceNode(const JSTokenLocation& location, ExpressionNode* expr1, ExpressionNode* expr2)
1366{
1367 // Optimization for `x?.y ?? z`.
1368 if (expr1->isOptionalChain()) {
1369 OptionalChainNode* optionalChain = static_cast<OptionalChainNode*>(expr1);
1370 if (!optionalChain->expr()->isDeleteNode()) {
1371 constexpr bool hasAbsorbedOptionalChain = true;
1372 return new (m_parserArena) CoalesceNode(location, optionalChain->expr(), expr2, hasAbsorbedOptionalChain);
1373 }
1374 }
1375 constexpr bool hasAbsorbedOptionalChain = false;
1376 return new (m_parserArena) CoalesceNode(location, expr1, expr2, hasAbsorbedOptionalChain);
1377}
1378
1379ExpressionNode* ASTBuilder::makeFunctionCallNode(const JSTokenLocation& location, ExpressionNode* func, bool previousBaseWasSuper, ArgumentsNode* args, const JSTextPosition& divotStart, const JSTextPosition& divot, const JSTextPosition& divotEnd, size_t callOrApplyChildDepth, bool isOptionalCall)
1380{
1381 ASSERT(divot.offset >= divot.lineStartOffset);
1382 if (func->isSuperNode())
1383 usesSuperCall();
1384
1385 if (func->isBytecodeIntrinsicNode()) {
1386 ASSERT(!isOptionalCall);
1387 BytecodeIntrinsicNode* intrinsic = static_cast<BytecodeIntrinsicNode*>(func);
1388 if (intrinsic->type() == BytecodeIntrinsicNode::Type::Constant && intrinsic->entry().type() == BytecodeIntrinsicRegistry::Type::Emitter)
1389 return new (m_parserArena) BytecodeIntrinsicNode(BytecodeIntrinsicNode::Type::Function, location, intrinsic->entry(), intrinsic->identifier(), args, divot, divotStart, divotEnd);
1390 }
1391
1392 if (func->isOptionalChain()) {
1393 OptionalChainNode* optionalChain = static_cast<OptionalChainNode*>(func);
1394 if (optionalChain->expr()->isLocation()) {
1395 ASSERT(!optionalChain->expr()->isResolveNode());
1396 // We must take care to preserve our `this` value in cases like `a?.b?.()` and `(a?.b)()`, respectively.
1397 if (isOptionalCall)
1398 return makeFunctionCallNode(location, optionalChain->expr(), previousBaseWasSuper, args, divotStart, divot, divotEnd, callOrApplyChildDepth, isOptionalCall);
1399 optionalChain->setExpr(makeFunctionCallNode(location, optionalChain->expr(), previousBaseWasSuper, args, divotStart, divot, divotEnd, callOrApplyChildDepth, isOptionalCall));
1400 return optionalChain;
1401 }
1402 }
1403
1404 if (!func->isLocation())
1405 return new (m_parserArena) FunctionCallValueNode(location, func, args, divot, divotStart, divotEnd);
1406 if (func->isResolveNode()) {
1407 ResolveNode* resolve = static_cast<ResolveNode*>(func);
1408 const Identifier& identifier = resolve->identifier();
1409 if (identifier == m_vm.propertyNames->eval) {
1410 usesEval();
1411 return new (m_parserArena) EvalFunctionCallNode(location, args, divot, divotStart, divotEnd);
1412 }
1413 return new (m_parserArena) FunctionCallResolveNode(location, identifier, args, divot, divotStart, divotEnd);
1414 }
1415 if (func->isBracketAccessorNode()) {
1416 BracketAccessorNode* bracket = static_cast<BracketAccessorNode*>(func);
1417 FunctionCallBracketNode* node = new (m_parserArena) FunctionCallBracketNode(location, bracket->base(), bracket->subscript(), bracket->subscriptHasAssignments(), args, divot, divotStart, divotEnd);
1418 node->setSubexpressionInfo(bracket->divot(), bracket->divotEnd().offset);
1419 return node;
1420 }
1421 ASSERT(func->isDotAccessorNode());
1422 DotAccessorNode* dot = static_cast<DotAccessorNode*>(func);
1423 FunctionCallDotNode* node = nullptr;
1424 if (!previousBaseWasSuper && (dot->identifier() == m_vm.propertyNames->builtinNames().callPublicName() || dot->identifier() == m_vm.propertyNames->builtinNames().callPrivateName()))
1425 node = new (m_parserArena) CallFunctionCallDotNode(location, dot->base(), dot->identifier(), args, divot, divotStart, divotEnd, callOrApplyChildDepth);
1426 else if (!previousBaseWasSuper && (dot->identifier() == m_vm.propertyNames->builtinNames().applyPublicName() || dot->identifier() == m_vm.propertyNames->builtinNames().applyPrivateName())) {
1427 // FIXME: This check is only needed because we haven't taught the bytecode generator to inline
1428 // Reflect.apply yet. See https://bugs.webkit.org/show_bug.cgi?id=190668.
1429 if (!dot->base()->isResolveNode() || static_cast<ResolveNode*>(dot->base())->identifier() != "Reflect")
1430 node = new (m_parserArena) ApplyFunctionCallDotNode(location, dot->base(), dot->identifier(), args, divot, divotStart, divotEnd, callOrApplyChildDepth);
1431 }
1432 if (!node)
1433 node = new (m_parserArena) FunctionCallDotNode(location, dot->base(), dot->identifier(), args, divot, divotStart, divotEnd);
1434 node->setSubexpressionInfo(dot->divot(), dot->divotEnd().offset);
1435 return node;
1436}
1437
1438ExpressionNode* ASTBuilder::makeBinaryNode(const JSTokenLocation& location, int token, std::pair<ExpressionNode*, BinaryOpInfo> lhs, std::pair<ExpressionNode*, BinaryOpInfo> rhs)
1439{
1440 switch (token) {
1441 case COALESCE:
1442 return makeCoalesceNode(location, lhs.first, rhs.first);
1443
1444 case OR:
1445 return new (m_parserArena) LogicalOpNode(location, lhs.first, rhs.first, OpLogicalOr);
1446
1447 case AND:
1448 return new (m_parserArena) LogicalOpNode(location, lhs.first, rhs.first, OpLogicalAnd);
1449
1450 case BITOR:
1451 return makeBitOrNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1452
1453 case BITXOR:
1454 return makeBitXOrNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1455
1456 case BITAND:
1457 return makeBitAndNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1458
1459 case EQEQ:
1460 return new (m_parserArena) EqualNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1461
1462 case NE:
1463 return new (m_parserArena) NotEqualNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1464
1465 case STREQ:
1466 return new (m_parserArena) StrictEqualNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1467
1468 case STRNEQ:
1469 return new (m_parserArena) NotStrictEqualNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1470
1471 case LT:
1472 return new (m_parserArena) LessNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1473
1474 case GT:
1475 return new (m_parserArena) GreaterNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1476
1477 case LE:
1478 return new (m_parserArena) LessEqNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1479
1480 case GE:
1481 return new (m_parserArena) GreaterEqNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1482
1483 case INSTANCEOF: {
1484 InstanceOfNode* node = new (m_parserArena) InstanceOfNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1485 setExceptionLocation(node, lhs.second.start, rhs.second.start, rhs.second.end);
1486 return node;
1487 }
1488
1489 case INTOKEN: {
1490 InNode* node = new (m_parserArena) InNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1491 setExceptionLocation(node, lhs.second.start, rhs.second.start, rhs.second.end);
1492 return node;
1493 }
1494
1495 case LSHIFT:
1496 return makeLeftShiftNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1497
1498 case RSHIFT:
1499 return makeRightShiftNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1500
1501 case URSHIFT:
1502 return makeURightShiftNode(location, lhs.first, rhs.first, rhs.second.hasAssignment);
1503
1504 case PLUS:
1505 return makeAddNode(