1 /**
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef ES2PANDA_PARSER_CORE_PARSER_IMPL_H
17 #define ES2PANDA_PARSER_CORE_PARSER_IMPL_H
18
19 #include <binder/binder.h>
20 #include <es2panda.h>
21 #include <ir/astNode.h>
22 #include <ir/base/methodDefinition.h>
23 #include <lexer/token/sourceLocation.h>
24 #include <macros.h>
25 #include <mem/arena_allocator.h>
26 #include <parser/context/parserContext.h>
27 #include <parser/module/sourceTextModuleRecord.h>
28 #include <parser/parserFlags.h>
29 #include <parser/program/program.h>
30 #include <util/enumbitops.h>
31 #include <util/ustring.h>
32
33 #include <memory>
34 #include <sstream>
35 #include <unordered_map>
36 #include <unordered_set>
37
38 namespace panda::es2panda::lexer {
39 enum class TokenFlags : uint8_t;
40 enum class TokenType;
41 class LexerPosition;
42 class Token;
43 class Lexer;
44 } // namespace panda::es2panda::lexer
45
46 namespace panda::es2panda::ir {
47 class ArrowFunctionExpression;
48 class AstNode;
49 class BlockStatement;
50 class BreakStatement;
51 class CallExpression;
52 class ClassDeclaration;
53 class ClassDefinition;
54 class ContinueStatement;
55 class DoWhileStatement;
56 class ExportAllDeclaration;
57 class ExportDefaultDeclaration;
58 class ExportNamedDeclaration;
59 class ExportNamedDeclaration;
60 class Expression;
61 class FunctionDeclaration;
62 class FunctionExpression;
63 class Identifier;
64 class IfStatement;
65 class ImportDeclaration;
66 class LabelledStatement;
67 class NewExpression;
68 class ObjectExpression;
69 class ReturnStatement;
70 class ScriptFunction;
71 class SequenceExpression;
72 class SpreadElement;
73 class Statement;
74 class StringLiteral;
75 class SwitchCaseStatement;
76 class SwitchStatement;
77 class TSArrayType;
78 class TSEnumDeclaration;
79 class TSFunctionType;
80 class TSInterfaceDeclaration;
81 class TSIntersectionType;
82 class TSTupleType;
83 class TSTypeAliasDeclaration;
84 class TSUnionType;
85 class TSImportType;
86 class TemplateLiteral;
87 class ThrowStatement;
88 class TryStatement;
89 class VariableDeclaration;
90 class WhileStatement;
91 class WithStatement;
92 class TSTypeParameter;
93 class TSTypeParameterDeclaration;
94 class MemberExpression;
95 class MethodDefinition;
96 class TSTypeReference;
97 class TSMappedType;
98 class TSTypePredicate;
99 class Decorator;
100 class TSIndexSignature;
101 class Property;
102 class TSTypeParameterInstantiation;
103 class TSParameterProperty;
104 class TSTypeAssertion;
105 class TSAsExpression;
106 class TSSatisfiesExpression;
107 class YieldExpression;
108 class MetaProperty;
109 class TSModuleDeclaration;
110 class TSImportEqualsDeclaration;
111 class TSModuleBlock;
112 class EmptyStatement;
113 class DebuggerStatement;
114 class CatchClause;
115 class VariableDeclarator;
116
117 enum class PropertyKind;
118 enum class TSTupleKind;
119 enum class MethodDefinitionKind;
120 enum class ModifierFlags : uint16_t;
121 } // namespace panda::es2panda::ir
122
123 namespace panda::es2panda::parser {
124
125 class Program;
126 class ParserContext;
127
128 class ClassElmentDescriptor {
129 public:
130 ir::MethodDefinitionKind methodKind {};
131 ParserStatus newStatus {};
132 ir::ModifierFlags modifiers {};
133 lexer::SourcePosition methodStart {};
134 lexer::SourcePosition propStart {};
135 bool isPrivateIdent {};
136 bool hasSuperClass {};
137 bool isGenerator {};
138 bool invalidComputedProperty {};
139 bool isComputed {};
140 bool isIndexSignature {};
141 bool classMethod {};
142 bool classField {};
143 };
144
145 class ArrowFunctionDescriptor {
146 public:
ArrowFunctionDescriptor(ArenaVector<ir::Expression * > && p,binder::FunctionParamScope * ps,lexer::SourcePosition sl,ParserStatus ns)147 explicit ArrowFunctionDescriptor(ArenaVector<ir::Expression *> &&p, binder::FunctionParamScope *ps,
148 lexer::SourcePosition sl, ParserStatus ns)
149 : params(p), paramScope(ps), startLoc(sl), newStatus(ns)
150 {
151 }
152
153 ArenaVector<ir::Expression *> params;
154 binder::FunctionParamScope *paramScope;
155 lexer::SourcePosition startLoc;
156 ParserStatus newStatus;
157 };
158
159 enum class TypeAnnotationParsingOptions : uint8_t {
160 NO_OPTS = 0,
161 IN_UNION = 1 << 0,
162 ALLOW_CONST = 1 << 1,
163 IN_INTERSECTION = 1 << 2,
164 RESTRICT_EXTENDS = 1 << 3,
165 THROW_ERROR = 1 << 4,
166 CAN_BE_TS_TYPE_PREDICATE = 1 << 5,
167 BREAK_AT_NEW_LINE = 1 << 6,
168 IN_MODIFIER = 1 << 7,
169 };
170
DEFINE_BITOPS(TypeAnnotationParsingOptions)171 DEFINE_BITOPS(TypeAnnotationParsingOptions)
172
173 class ArrowFunctionContext;
174
175 enum class PrivateGetterSetterType : uint8_t {
176 GETTER = 0,
177 SETTER = 1 << 0,
178 STATIC = 1 << 1,
179 };
180
DEFINE_BITOPS(PrivateGetterSetterType)181 DEFINE_BITOPS(PrivateGetterSetterType)
182
183 class ParserImpl {
184 public:
185 explicit ParserImpl(es2panda::ScriptExtension extension);
186 NO_COPY_SEMANTIC(ParserImpl);
187 NO_MOVE_SEMANTIC(ParserImpl);
188 ~ParserImpl() = default;
189
190 Program Parse(const SourceFile &sourceFile, const CompilerOptions &options);
191
192 ScriptExtension Extension() const;
193
194 void AddPatchFixHelper(util::PatchFix *patchFixHelper);
195
196 ArenaAllocator *Allocator() const
197 {
198 return program_.Allocator();
199 }
200 bool IsDtsFile() const;
201
202 private:
203 bool IsStartOfMappedType() const;
204 bool IsStartOfTsTypePredicate() const;
205 bool IsStartOfAbstractConstructorType() const;
206
207 bool CurrentTokenIsModifier(char32_t nextCp) const;
208 [[noreturn]] void ThrowParameterModifierError(ir::ModifierFlags status) const;
209 [[noreturn]] void ThrowSyntaxError(std::string_view errorMessage) const;
210 [[noreturn]] void ThrowSyntaxError(std::initializer_list<std::string_view> list) const;
211 [[noreturn]] void ThrowSyntaxError(std::initializer_list<std::string_view> list,
212 const lexer::SourcePosition &pos) const;
213
214 [[noreturn]] void ThrowSyntaxError(std::string_view errorMessage, const lexer::SourcePosition &pos) const;
215
216 template <typename T, typename... Args>
217 T *AllocNode(Args &&... args)
218 {
219 auto ret = program_.Allocator()->New<T>(std::forward<Args>(args)...);
220 if (ret == nullptr) {
221 throw Error(ErrorType::GENERIC, "Unsuccessful allocation during parsing");
222 }
223 return ret;
224 }
225
226 [[nodiscard]] std::unique_ptr<lexer::Lexer> InitLexer(const std::string &fileName, const std::string &source);
227 void ParseScript();
228 void ParseModule();
229
230 /*
231 * Transform the commonjs module's AST by wrap the sourceCode & use Reflect.apply to invoke this wrapper with [this]
232 * pointing to [exports] object
233 *
234 * Reflect.apply(function (exports, require, module, __filename, __dirname) {
235 * [SourceCode]
236 * }, exports, [exports, require, module, __filename, __dirname]);
237 */
238 void ParseCommonjs();
239 void AddCommonjsParams(ArenaVector<ir::Expression *> ¶ms);
240 void AddReflectApplyArgs(ArenaVector<ir::Expression *> &args, ir::FunctionExpression *wrapper);
241 void ParseProgram(ScriptKind kind);
242 bool CheckTopStatementsForRequiredDeclare(const ArenaVector<ir::Statement *> &statements);
243 static ExpressionParseFlags CarryExpressionParserFlag(ExpressionParseFlags origin, ExpressionParseFlags carry);
244 static ExpressionParseFlags CarryPatternFlags(ExpressionParseFlags flags);
245 static ExpressionParseFlags CarryAllowTsParamAndPatternFlags(ExpressionParseFlags flags);
246 bool CurrentIsBasicType();
247 bool CurrentLiteralIsBasicType();
248 static bool CheckTypeNameIsReserved(const util::StringView ¶mName);
249 static bool IsPropertyKeysAreSame(const ir::Expression *exp1, const ir::Expression *exp2);
250 static bool IsMemberExpressionsAreSame(const ir::MemberExpression *mExp1, const ir::MemberExpression *mExp2);
251 static bool IsMethodDefinitionsAreSame(const ir::MethodDefinition *property, ir::MethodDefinition *overload);
252 ir::TSTypeReference *ParseTsConstExpression();
253 ir::Expression *ParseTsTypeOperatorOrTypeReference(bool throwError);
254 ir::Expression *ParseTsIdentifierReference(TypeAnnotationParsingOptions options);
255 ir::Expression *ParseTsBasicType(TypeAnnotationParsingOptions options);
256 ir::TSIntersectionType *ParseTsIntersectionType(ir::Expression *type, bool inUnion, bool restrictExtends,
257 bool throwError);
258 ir::TSUnionType *ParseTsUnionType(ir::Expression *type, bool restrictExtends, bool throwError);
259 ir::Expression *ParseTsParenthesizedOrFunctionType(ir::Expression *typeAnnotation, bool throwError);
260 ir::TSArrayType *ParseTsArrayType(ir::Expression *elementType);
261 bool IsTsFunctionType();
262 ir::Expression *ParseTsFunctionType(lexer::SourcePosition startLoc, bool isConstructionType, bool throwError,
263 bool abstractConstructor = false);
264 ir::TSTypeParameter *ParseTsMappedTypeParameter();
265 ir::MappedOption ParseMappedOption(lexer::TokenType tokenType);
266 ir::TSMappedType *ParseTsMappedType();
267 ir::TSTypePredicate *ParseTsTypePredicate();
268 void ParseTsTypeLiteralOrInterfaceKeyModifiers(bool *isGetAccessor, bool *isSetAccessor);
269 ir::Expression *ParseTsTypeLiteralOrInterfaceKey(bool *computed, bool *signature, bool *isIndexSignature);
270 void ValidateIndexSignatureParameterType(ir::Expression *typeAnnotation);
271 ir::Expression *ParseTsConditionalType(ir::Expression *checkType, bool restrictExtends);
272 ir::Expression *ParseTsTypeLiteralOrInterfaceMember();
273 ArenaVector<ir::Expression *> ParseTsTypeLiteralOrInterface();
274 ir::Expression *ParseTsThisType(bool throwError);
275 ir::Expression *ParseTsIndexAccessType(ir::Expression *typeName, bool throwError);
276 ir::Expression *ParseTsQualifiedReference(ir::Expression *typeName);
277 ir::Expression *ParseTsTypeReferenceOrQuery(TypeAnnotationParsingOptions options, bool parseQuery = false);
278 bool IsTSNamedTupleMember();
279 void HandleRestType(ir::AstNodeType elementType, bool *hasRestType) const;
280 ir::Expression *ParseTsTupleElement(ir::TSTupleKind *kind, bool *seenOptional, bool *hasRestType);
281 ir::TSTupleType *ParseTsTupleType();
282 ir::TSImportType *ParseTsImportType(const lexer::SourcePosition &startLoc, bool isTypeof = false);
283 ir::Expression *ParseTsTypeAnnotation(TypeAnnotationParsingOptions *options);
284 ir::Expression *ParseTsTypeLiteralOrTsMappedType(ir::Expression *typeAnnotation);
285 ir::Expression *ParseTsTypeReferenceOrTsTypePredicate(ir::Expression *typeAnnotation, bool canBeTsTypePredicate,
286 bool throwError);
287 ir::Expression *ParseTsThisTypeOrTsTypePredicate(ir::Expression *typeAnnotation, bool canBeTsTypePredicate,
288 bool throwError);
289 ir::Expression *ParseTsTemplateLiteralType(bool throwError);
290 ir::Expression *ParseTsTypeAnnotationElement(ir::Expression *typeAnnotation, TypeAnnotationParsingOptions *options);
291 ir::ModifierFlags ParseModifiers();
292
293 void ThrowIfPrivateIdent(ClassElmentDescriptor *desc, const char *msg);
294 void ValidateClassKey(ClassElmentDescriptor *desc, bool isDeclare);
295
296 void ValidateClassMethodStart(ClassElmentDescriptor *desc, ir::Expression *typeAnnotation);
297 ir::Expression *ParseClassKey(ClassElmentDescriptor *desc, bool isDeclare);
298
299 void ValidateClassSetter(ClassElmentDescriptor *desc, const ArenaVector<ir::Statement *> &properties,
300 ir::Expression *propName, ir::ScriptFunction *func, bool hasDecorator,
301 lexer::SourcePosition errorInfo);
302 void ValidateClassGetter(ClassElmentDescriptor *desc, const ArenaVector<ir::Statement *> &properties,
303 ir::Expression *propName, ir::ScriptFunction *func, bool hasDecorator,
304 lexer::SourcePosition errorInfo);
305 void ValidatePrivateProperty(ir::Statement *stmt, std::unordered_set<util::StringView> &privateNames,
306 std::unordered_map<util::StringView, PrivateGetterSetterType> &unusedGetterSetterPairs);
307 ir::MethodDefinition *ParseClassMethod(ClassElmentDescriptor *desc, const ArenaVector<ir::Statement *> &properties,
308 ir::Expression *propName, lexer::SourcePosition *propEnd,
309 ArenaVector<ir::Decorator *> &&decorators, bool isDeclare);
310 ir::ClassStaticBlock *ParseStaticBlock(ClassElmentDescriptor *desc);
311 ir::Statement *ParseClassProperty(ClassElmentDescriptor *desc, const ArenaVector<ir::Statement *> &properties,
312 ir::Expression *propName, ir::Expression *typeAnnotation,
313 ArenaVector<ir::Decorator *> &&decorators, bool isDeclare,
314 std::pair<binder::FunctionScope *, binder::FunctionScope *> implicitScopes);
315 void ParseClassKeyModifiers(ClassElmentDescriptor *desc);
316 void CheckClassGeneratorMethod(ClassElmentDescriptor *desc);
317 void CheckClassPrivateIdentifier(ClassElmentDescriptor *desc);
318 void CheckFieldKey(ir::Expression *propName);
319 ir::Expression *ParseClassKeyAnnotation();
320 ir::Decorator *ParseDecorator();
321 ArenaVector<ir::Decorator *> ParseDecorators();
322 ir::Statement *ParseClassElement(const ArenaVector<ir::Statement *> &properties,
323 ArenaVector<ir::TSIndexSignature *> *indexSignatures, bool hasSuperClass,
324 bool isDeclare, bool isAbstractClass, bool isExtendsFromNull,
325 std::pair<binder::FunctionScope *, binder::FunctionScope *> implicitScopes);
326 ir::Identifier *GetKeyByFuncFlag(ir::ScriptFunctionFlags funcFlag);
327 ir::MethodDefinition *CreateImplicitMethod(ir::Expression *superClass, bool hasSuperClass,
328 ir::ScriptFunctionFlags funcFlag, bool isDeclare = false);
329 ir::MethodDefinition *CheckClassMethodOverload(ir::Statement *property, ir::MethodDefinition **ctor, bool isDeclare,
330 lexer::SourcePosition errorInfo, ir::MethodDefinition *lastOverload,
331 bool implExists, bool isAbstract = false);
332 ir::Identifier *SetIdentNodeInClassDefinition(bool isDeclare, binder::ConstDecl **decl);
333 ir::ClassDefinition *ParseClassDefinition(bool isDeclaration, bool idRequired = true, bool isDeclare = false,
334 bool isAbstract = false);
335 ir::Expression *ParseSuperClass(bool isDeclare, bool *hasSuperClass, bool *isExtendsFromNull);
336 ArenaVector<ir::TSClassImplements *> ParseTSClassImplements(bool isDeclare);
337 void ValidateClassConstructor(const ir::MethodDefinition *ctor,
338 const ArenaVector<ir::Statement *> &properties,
339 bool isDeclare, bool hasConstructorFuncBody,
340 bool hasSuperClass, bool isExtendsFromNull);
341 void FindSuperCall(const ir::AstNode *parent, bool *hasSuperCall);
342 void FindSuperCallInCtorChildNode(const ir::AstNode *childNode, bool *hasSuperCall);
343 bool SuperCallShouldBeRootLevel(const ir::MethodDefinition *ctor, const ArenaVector<ir::Statement *> &properties);
344 void ValidateSuperCallLocation(const ir::MethodDefinition *ctor, bool superCallShouldBeRootLevel);
345 void FindThisOrSuperReference(const ir::AstNode *parent, bool *hasThisOrSuperReference);
346 void FindThisOrSuperReferenceInChildNode(const ir::AstNode *childNode, bool *hasThisOrSuperReference);
347 void ValidateAccessor(ExpressionParseFlags flags, lexer::TokenFlags currentTokenFlags);
348 void CheckPropertyKeyAsycModifier(ParserStatus *methodStatus);
349 ir::Property *ParseShorthandProperty(const lexer::LexerPosition *startPos);
350 void ParseGeneratorPropertyModifier(ExpressionParseFlags flags, ParserStatus *methodStatus);
351 bool ParsePropertyModifiers(ExpressionParseFlags flags, ir::PropertyKind *propertyKind, ParserStatus *methodStatus);
352 ir::Expression *ParsePropertyKey(ExpressionParseFlags flags);
353 ir::Expression *ParsePropertyValue(const ir::PropertyKind *propertyKind, const ParserStatus *methodStatus,
354 ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
355 bool ParsePropertyEnd();
356
357 ir::Expression *ParsePostfixTypeOrHigher(ir::Expression *typeAnnotation, TypeAnnotationParsingOptions *options);
358 ir::Expression *TryParseConstraintOfInferType(TypeAnnotationParsingOptions *options);
359 ir::Expression *ParsePropertyDefinition(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
360 bool CheckOutIsIdentInTypeParameter();
361 void ParseTypeModifier(bool &isTypeIn, bool &isTypeOut, bool &isAllowInOut);
362 ir::TSTypeParameter *ParseTsTypeParameter(bool throwError, bool addBinding = false, bool isAllowInOut = false);
363 ir::TSTypeParameterDeclaration *ParseTsTypeParameterDeclaration(bool throwError = true, bool isAllowInOut = false);
364 ir::TSTypeParameterInstantiation *ParseTsTypeParameterInstantiation(bool throwError = true);
365 ir::ScriptFunction *ParseFunction(ParserStatus newStatus = ParserStatus::NO_OPTS,
366 bool isDeclare = false,
367 ArenaVector<ir::ParamDecorators> *paramDecorators = nullptr);
368 void ValidateFunctionParam(const ArenaVector<ir::Expression *> ¶ms, const ir::Expression *parameter,
369 bool *seenOptional);
370 void ValidateTsFunctionOverloadParams(const ArenaVector<ir::Expression *> ¶ms);
371 void CheckAccessorPair(const ArenaVector<ir::Statement *> &properties, const ir::Expression *propName,
372 ir::MethodDefinitionKind methodKind, ir::ModifierFlags access, bool hasDecorator,
373 lexer::SourcePosition errorInfo);
374 ArenaVector<ir::Expression *> ParseFunctionParams(bool isDeclare = false,
375 ArenaVector<ir::ParamDecorators> *paramDecorators = nullptr);
376 ir::SpreadElement *ParseSpreadElement(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
377 ir::TSParameterProperty *CreateTsParameterProperty(ir::Expression *parameter, ir::ModifierFlags modifiers);
378 ir::Expression *ParseFunctionParameter(bool isDeclare);
379 void CreateTSVariableForProperty(ir::AstNode *node, const ir::Expression *key, binder::VariableFlags flags);
380 void CheckObjectTypeForDuplicatedProperties(ir::Expression *member, ArenaVector<ir::Expression *> const &members);
381
382 // ExpressionParser.Cpp
383
384 ir::Expression *ParseExpression(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
385 ir::ArrowFunctionExpression *ParseTsGenericArrowFunction();
386 ir::TSTypeAssertion *ParseTsTypeAssertion(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
387 ir::TSAsExpression *ParseTsAsExpression(ir::Expression *expr, ExpressionParseFlags flags);
388 ir::TSSatisfiesExpression *ParseTsSatisfiesExpression(ir::Expression *expr);
389 ir::Expression *ParseArrayExpression(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
390 ir::YieldExpression *ParseYieldExpression();
391 ir::Expression *ParsePotentialExpressionSequence(ir::Expression *expr, ExpressionParseFlags flags);
392 ParserStatus ValidateArrowParameter(ir::Expression *expr);
393
394 ArrowFunctionDescriptor ConvertToArrowParameter(ir::Expression *expr, bool isAsync,
395 binder::FunctionParamScope *paramScope);
396 ir::ArrowFunctionExpression *ParseArrowFunctionExpressionBody(ArrowFunctionContext *arrowFunctionContext,
397 binder::FunctionScope *functionScope,
398 ArrowFunctionDescriptor *desc,
399 ir::TSTypeParameterDeclaration *typeParamDecl,
400 ir::Expression *returnTypeAnnotation);
401 ir::ArrowFunctionExpression *ParseArrowFunctionExpression(ir::Expression *expr,
402 ir::TSTypeParameterDeclaration *typeParamDecl,
403 ir::Expression *returnTypeAnnotation, bool isAsync);
404 ir::Expression *ParseCoverParenthesizedExpressionAndArrowParameterList();
405 ir::Expression *ParseKeywordExpression();
406 ir::Expression *ParseBinaryExpression(ir::Expression *left);
407 ir::CallExpression *ParseCallExpression(ir::Expression *callee, bool isOptionalChain = false, bool isAsync = false);
408 ir::ArrowFunctionExpression *ParsePotentialArrowExpression(ir::Expression **returnExpression,
409 const lexer::SourcePosition &startLoc,
410 bool ignoreCallExpression);
411
412 void ValidateUpdateExpression(ir::Expression *returnExpression, bool isChainExpression);
413 bool IsGenericInstantiation();
414 bool ParsePotentialTsGenericFunctionCall(ir::Expression **returnExpression, const lexer::SourcePosition &startLoc,
415 bool ignoreCallExpression);
416 ir::Expression *ParsePostPrimaryExpression(ir::Expression *primaryExpr, lexer::SourcePosition startLoc,
417 bool ignoreCallExpression, bool *isChainExpression);
418 ir::Expression *ParseMemberExpression(bool ignoreCallExpression = false,
419 ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
420 ir::ObjectExpression *ParseObjectExpression(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
421 ir::SequenceExpression *ParseSequenceExpression(ir::Expression *startExpr, bool acceptRest = false,
422 bool acceptTsParam = false, bool acceptPattern = false);
423 ir::Expression *ParseUnaryOrPrefixUpdateExpression(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
424 ir::Expression *ParseLeftHandSideExpression(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
425 ir::MetaProperty *ParsePotentialNewTarget();
426 void CheckInvalidDestructuring(const ir::AstNode *object) const;
427 void ValidateParenthesizedExpression(ir::Expression *lhsExpression);
428 ir::Expression *ParseAssignmentExpression(ir::Expression *lhsExpression,
429 ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
430 ir::Expression *ParsePrimaryExpression(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS);
431 ir::NewExpression *ParseNewExpression();
432 void ParsePotentialTsFunctionParameter(ExpressionParseFlags flags, ir::Expression *returnNode,
433 bool isDeclare = false);
434 ir::Expression *ParsePatternElement(ExpressionParseFlags flags = ExpressionParseFlags::NO_OPTS,
435 bool allowDefault = true, bool isDeclare = false);
436 ir::TemplateLiteral *ParseTemplateLiteral(bool isTaggedTemplate = false);
437 ir::Expression *ParseImportExpression();
438 ir::ObjectExpression *ParseImportAssertionForDynamicImport();
439 void ValidateImportAssertionForDynamicImport(ir::ObjectExpression *importAssertion);
440 ir::AssertClause *ParseAssertClause();
441 ir::AssertEntry *ParseAssertEntry();
442 ir::FunctionExpression *ParseFunctionExpression(ParserStatus newStatus = ParserStatus::NO_OPTS);
443 ir::Expression *ParseOptionalChain(ir::Expression *leftSideExpr);
444 ir::Expression *ParseOptionalMemberExpression(ir::Expression *object);
445 void ParseNameSpaceImport(ArenaVector<ir::AstNode *> *specifiers, bool isType);
446 ir::Identifier *ParseNamedImport(const lexer::Token &importedToken);
447 binder::Decl *AddImportDecl(bool isType,
448 util::StringView name,
449 lexer::SourcePosition startPos,
450 binder::DeclarationFlags flag);
451
452 ir::StringLiteral *ParseFromClause(bool requireFrom = true);
453 void ParseNamedImportSpecifiers(ArenaVector<ir::AstNode *> *specifiers, bool isType, bool isLazy);
454 bool HandleTypeImportOrExportSpecifier();
455 ir::Expression *ParseModuleReference();
456 ir::AstNode *ParseImportDefaultSpecifier(ArenaVector<ir::AstNode *> *specifiers, bool isType);
457 ir::AstNode *ParseImportSpecifiers(ArenaVector<ir::AstNode *> *specifiers, bool isType, bool isLazy);
458 void ValidateAssignmentTarget(ExpressionParseFlags flags, ir::Expression *node);
459 void ValidateLvalueAssignmentTarget(ir::Expression *node) const;
460 void ValidateArrowParameterBindings(const ir::Expression *node);
461
462 ir::ExportDefaultDeclaration *ParseExportDefaultDeclaration(const lexer::SourcePosition &startLoc,
463 ArenaVector<ir::Decorator *> decorators,
464 bool isExportEquals = false);
465 ir::ExportAllDeclaration *ParseExportAllDeclaration(const lexer::SourcePosition &startLoc);
466 ir::ExportNamedDeclaration *ParseExportNamedSpecifiers(const lexer::SourcePosition &startLoc, bool isType);
467 ir::ExportNamedDeclaration *ParseNamedExportDeclaration(const lexer::SourcePosition &startLoc,
468 ArenaVector<ir::Decorator *> &&decorators);
469 ir::Identifier *ParseNamedExport(const lexer::Token &exportedToken);
470 void CheckStrictReservedWord() const;
471 ir::PrivateIdentifier *ParsePrivateIdentifier();
472
473 // Discard the DISALLOW_CONDITIONAL_TYPES in current status to call function.
474 template<class Function, typename... Args>
475 ir::Expression *DoOutsideOfDisallowConditinalTypesContext(Function func, Args &&... args);
476
477 // Add the DISALLOW_CONDITIONAL_TYPES to current status to call function.
478 template<typename Function, typename... Args>
479 ir::Expression *DoInsideOfDisallowConditinalTypesContext(Function func, Args &&... args);
480
481 bool InDisallowConditionalTypesContext();
482 bool InContext(ParserStatus status);
483 void AddFlagToStatus(ParserStatus status);
484 void RemoveFlagToStatus(ParserStatus status);
485 // StatementParser.Cpp
486
487 void ConsumeSemicolon(ir::Statement *statement);
488 void CheckFunctionDeclaration(StatementParsingFlags flags);
489
490 void CheckLabelledFunction(const ir::Statement *node);
491 bool CheckDeclare();
492
493 bool IsLabelFollowedByIterationStatement();
494
495 void AddImportEntryItem(const ir::StringLiteral *source, const ArenaVector<ir::AstNode *> *specifiers, bool isType,
496 bool isLazy);
497 void AddImportEntryItemForImportSpecifier(const ir::StringLiteral *source, const ir::AstNode *specifier,
498 bool isLazy);
499 void AddImportEntryItemForImportDefaultOrNamespaceSpecifier(const ir::StringLiteral *source,
500 const ir::AstNode *specifier, bool isType);
501 void AddExportNamedEntryItem(const ArenaVector<ir::ExportSpecifier *> &specifiers,
502 const ir::StringLiteral *source, bool isType);
503 void AddExportStarEntryItem(const lexer::SourcePosition &startLoc, const ir::StringLiteral *source,
504 const ir::Identifier *exported);
505 void AddExportDefaultEntryItem(const ir::AstNode *declNode);
506 void AddExportLocalEntryItem(const ir::Statement *declNode, bool isTsModule);
507 void AddTsTypeExportLocalEntryItem(const ir::Statement *declNode, bool isTsModule,
508 binder::TSModuleScope *tsModuleScope);
509 parser::SourceTextModuleRecord *GetSourceTextModuleRecord();
510 parser::SourceTextModuleRecord *GetSourceTextTypeModuleRecord();
511
512 bool ParseDirective(ArenaVector<ir::Statement *> *statements);
513 void ParseDirectivePrologue(ArenaVector<ir::Statement *> *statements);
514 ArenaVector<ir::Statement *> ParseStatementList(StatementParsingFlags flags = StatementParsingFlags::ALLOW_LEXICAL);
515 bool IsTsDeclarationStatement() const;
516 ir::Statement *ParseStatement(StatementParsingFlags flags = StatementParsingFlags::NONE);
517 ir::TSModuleDeclaration *ParseTsModuleDeclaration(bool isDeclare, bool isExport = false);
518 ir::TSModuleDeclaration *ParseTsAmbientExternalModuleDeclaration(const lexer::SourcePosition &startLoc,
519 bool isDeclare);
520 ir::TSModuleDeclaration *ParseTsModuleOrNamespaceDelaration(const lexer::SourcePosition &startLoc,
521 bool isDeclare,
522 bool isExport);
523 bool IsInstantiatedInTsModuleBlock(ir::Statement **body);
524
525 ir::TSImportEqualsDeclaration *ParseTsImportEqualsDeclaration(const lexer::SourcePosition &startLoc,
526 bool isExport = false);
527 ir::TSNamespaceExportDeclaration *ParseTsNamespaceExportDeclaration(const lexer::SourcePosition &startLoc);
528 ir::TSModuleBlock *ParseTsModuleBlock();
529 ir::BlockStatement *ParseFunctionBody();
530 ir::BlockStatement *ParseBlockStatement();
531 ir::BlockStatement *ParseBlockStatement(binder::Scope *scope);
532 ir::EmptyStatement *ParseEmptyStatement();
533 ir::DebuggerStatement *ParseDebuggerStatement();
534 ir::BreakStatement *ParseBreakStatement();
535 ir::ContinueStatement *ParseContinueStatement();
536 ir::DoWhileStatement *ParseDoWhileStatement();
537 ir::Statement *ParsePotentialExpressionStatement(StatementParsingFlags flags, bool isDeclare);
538 ir::Statement *ParseVarStatement(bool isDeclare);
539 ir::Statement *ParseLetStatement(StatementParsingFlags flags, bool isDeclare);
540 ir::Statement *ParseConstStatement(StatementParsingFlags flags, bool isDeclare);
541 ir::Statement *ParseExpressionStatement(StatementParsingFlags flags = StatementParsingFlags::NONE);
542 ir::Statement *ParseFunctionStatement(StatementParsingFlags flags, bool isDeclare);
543 ir::FunctionDeclaration *ParseFunctionDeclaration(bool canBeAnonymous = false,
544 ParserStatus newStatus = ParserStatus::NO_OPTS,
545 bool isDeclare = false);
546 void AddFunctionToBinder(ir::ScriptFunction *func, ParserStatus newStatus);
547 void CheckOptionalBindingPatternParameter(ir::ScriptFunction *func) const;
548 ir::Statement *ParseExportDeclaration(StatementParsingFlags flags, ArenaVector<ir::Decorator *> &&decorators);
549 std::tuple<ForStatementKind, ir::AstNode *, ir::Expression *, ir::Expression *> ParseForInOf(
550 ir::Expression *leftNode, ExpressionParseFlags exprFlags, bool isAwait);
551 std::tuple<ForStatementKind, ir::Expression *, ir::Expression *> ParseForInOf(ir::AstNode *initNode,
552 ExpressionParseFlags exprFlags,
553 bool isAwait);
554 std::tuple<ir::Expression *, ir::Expression *> ParseForUpdate(bool isAwait);
555 ir::Statement *ParseForStatement();
556 ir::IfStatement *ParseIfStatement();
557
558 ir::Statement *ParseImportDeclaration(StatementParsingFlags flags);
559 ir::LabelledStatement *ParseLabelledStatement(const lexer::LexerPosition &pos);
560 ir::ReturnStatement *ParseReturnStatement();
561 ir::ClassDeclaration *ParseClassStatement(StatementParsingFlags flags, bool isDeclare,
562 ArenaVector<ir::Decorator *> &&decorators, bool isAbstract = false);
563 ir::ClassDeclaration *ParseClassDeclaration(bool idRequired, ArenaVector<ir::Decorator *> &&decorators,
564 bool isDeclare = false, bool isAbstract = false,
565 bool isExported = false);
566 ir::TSTypeAliasDeclaration *ParseTsTypeAliasDeclaration(bool isDeclare);
567 ir::TSEnumDeclaration *ParseEnumMembers(ir::Identifier *key, const lexer::SourcePosition &enumStart,
568 bool isExport, bool isDeclare, bool isConst);
569 ir::TSEnumDeclaration *ParseEnumDeclaration(bool isExport = false, bool isDeclare = false, bool isConst = false);
570 ir::TSInterfaceDeclaration *ParseTsInterfaceDeclaration(bool isDeclare);
571 void ValidateTsInterfaceName(bool isDeclare);
572 ArenaVector<ir::TSInterfaceHeritage *> ParseTsInterfaceExtends();
573 ir::SwitchCaseStatement *ParseSwitchCaseStatement(bool *seenDefault);
574 ir::SwitchStatement *ParseSwitchStatement();
575 ir::ThrowStatement *ParseThrowStatement();
576 ir::Expression *ParseCatchParam();
577 ir::CatchClause *ParseCatchClause();
578 ir::TryStatement *ParseTryStatement();
579 void ValidateDeclaratorId(bool isDeclare);
580 ir::VariableDeclarator *ParseVariableDeclaratorInitializer(ir::Expression *init, VariableParsingFlags flags,
581 const lexer::SourcePosition &startLoc, bool isDeclare);
582 ir::VariableDeclarator *ParseVariableDeclarator(VariableParsingFlags flags, bool isDeclare);
583 ir::Expression *ParseVariableDeclaratorKey(VariableParsingFlags flags, bool isDeclare, bool *isDefinite);
584 ir::Statement *ParseVariableDeclaration(VariableParsingFlags flags = VariableParsingFlags::NO_OPTS,
585 bool isDeclare = false, bool isExport = false);
586 ir::WhileStatement *ParseWhileStatement();
587 ir::VariableDeclaration *ParseContextualLet(VariableParsingFlags flags,
588 StatementParsingFlags stmFlags = StatementParsingFlags::ALLOW_LEXICAL,
589 bool isDeclare = false);
590 void VerifySupportLazyImportVersion();
591
592 util::StringView GetNamespaceExportInternalName()
593 {
594 std::string name = std::string(parser::SourceTextModuleRecord::ANONY_NAMESPACE_NAME) +
595 std::to_string(namespaceExportCount_++);
596 util::UString internalName(name, Allocator());
597 return internalName.View();
598 }
599
600 binder::Binder *Binder()
601 {
602 return program_.Binder();
603 }
604 static constexpr unsigned MAX_RECURSION_DEPTH = 1024;
605
606 inline void RecursiveDepthCheck()
607 {
608 if (recursiveDepth_ < MAX_RECURSION_DEPTH) {
609 return;
610 }
611 RecursiveDepthException();
612 }
613
614 void RecursiveDepthException();
615 // RAII to recursive depth tracking.
616 class TrackRecursive {
617 public:
618 explicit TrackRecursive(ParserImpl *parser) : parser_(parser)
619 {
620 ++parser_->recursiveDepth_;
621 }
622 ~TrackRecursive()
623 {
624 --parser_->recursiveDepth_;
625 }
626 private:
627 ParserImpl *const parser_;
628 };
629
630 friend class Lexer;
631 friend class SavedParserContext;
632 friend class ArrowFunctionContext;
633
634 Program program_;
635 ParserContext context_;
636 lexer::Lexer *lexer_ {nullptr};
637 size_t namespaceExportCount_ {0};
638 size_t recursiveDepth_{0};
639 };
640
641 // Declare a RAII recursive tracker. Check whether the recursion limit has
642 // been exceeded, if so, throw a generic error.
643 // The macro only works from inside parserImpl methods.
644 #define CHECK_PARSER_RECURSIVE_DEPTH \
645 TrackRecursive trackRecursive{this}; \
646 RecursiveDepthCheck()
647
648 template <ParserStatus status>
649 class SavedStatusContext {
650 public:
SavedStatusContext(ParserContext * ctx)651 explicit SavedStatusContext(ParserContext *ctx)
652 // NOLINTNEXTLINE(readability-magic-numbers)
653 : ctx_(ctx), savedStatus_(static_cast<ParserStatus>(ctx->Status()))
654 {
655 // NOLINTNEXTLINE(readability-magic-numbers)
656 ctx->Status() |= status;
657 }
658
659 NO_COPY_SEMANTIC(SavedStatusContext);
660 NO_MOVE_SEMANTIC(SavedStatusContext);
661
~SavedStatusContext()662 ~SavedStatusContext()
663 {
664 ctx_->Status() = savedStatus_;
665 }
666
667 private:
668 ParserContext *ctx_;
669 ParserStatus savedStatus_;
670 };
671
672 class SwitchContext : public SavedStatusContext<ParserStatus::IN_SWITCH> {
673 public:
SwitchContext(ParserContext * ctx)674 explicit SwitchContext(ParserContext *ctx) : SavedStatusContext(ctx) {}
675 NO_COPY_SEMANTIC(SwitchContext);
676 NO_MOVE_SEMANTIC(SwitchContext);
677 ~SwitchContext() = default;
678 };
679
680 template <typename T>
681 class IterationContext : public SavedStatusContext<ParserStatus::IN_ITERATION> {
682 public:
IterationContext(ParserContext * ctx,binder::Binder * binder)683 explicit IterationContext(ParserContext *ctx, binder::Binder *binder)
684 : SavedStatusContext(ctx), lexicalScope_(binder)
685 {
686 }
687
688 NO_COPY_SEMANTIC(IterationContext);
689 NO_MOVE_SEMANTIC(IterationContext);
690 ~IterationContext() = default;
691
LexicalScope()692 const auto &LexicalScope() const
693 {
694 return lexicalScope_;
695 }
696
697 private:
698 binder::LexicalScope<T> lexicalScope_;
699 };
700
701 class FunctionParameterContext : public SavedStatusContext<ParserStatus::FUNCTION_PARAM> {
702 public:
FunctionParameterContext(ParserContext * ctx,binder::Binder * binder)703 explicit FunctionParameterContext(ParserContext *ctx, binder::Binder *binder)
704 : SavedStatusContext(ctx), lexicalScope_(binder)
705 {
706 }
707
LexicalScope()708 const auto &LexicalScope() const
709 {
710 return lexicalScope_;
711 }
712
713 NO_COPY_SEMANTIC(FunctionParameterContext);
714 NO_MOVE_SEMANTIC(FunctionParameterContext);
715 ~FunctionParameterContext() = default;
716
717 private:
718 binder::LexicalScope<binder::FunctionParamScope> lexicalScope_;
719 };
720
721 class SavedParserContext {
722 public:
723 template <typename... Args>
SavedParserContext(ParserImpl * parser,Args &&...args)724 explicit SavedParserContext(ParserImpl *parser, Args &&... args) : parser_(parser), prev_(parser->context_)
725 {
726 parser_->context_ = ParserContext(&prev_, std::forward<Args>(args)...);
727 }
728
729 NO_COPY_SEMANTIC(SavedParserContext);
730 DEFAULT_MOVE_SEMANTIC(SavedParserContext);
731
~SavedParserContext()732 ~SavedParserContext()
733 {
734 parser_->context_ = prev_;
735 }
736
737 protected:
Binder()738 binder::Binder *Binder()
739 {
740 return parser_->Binder();
741 }
742
743 ParserImpl *parser_;
744 ParserContext prev_;
745 };
746
747 class FunctionContext : public SavedParserContext {
748 public:
FunctionContext(ParserImpl * parser,ParserStatus newStatus)749 explicit FunctionContext(ParserImpl *parser, ParserStatus newStatus) : SavedParserContext(parser, newStatus)
750 {
751 if (newStatus & ParserStatus::GENERATOR_FUNCTION) {
752 flags_ |= ir::ScriptFunctionFlags::GENERATOR;
753 }
754
755 if (newStatus & ParserStatus::ASYNC_FUNCTION) {
756 flags_ |= ir::ScriptFunctionFlags::ASYNC;
757 }
758
759 if (newStatus & ParserStatus::CONSTRUCTOR_FUNCTION) {
760 flags_ |= ir::ScriptFunctionFlags::CONSTRUCTOR;
761 }
762 }
763
Flags()764 ir::ScriptFunctionFlags Flags() const
765 {
766 return flags_;
767 }
768
AddFlag(ir::ScriptFunctionFlags flags)769 void AddFlag(ir::ScriptFunctionFlags flags)
770 {
771 flags_ |= flags;
772 }
773
774 NO_COPY_SEMANTIC(FunctionContext);
775 NO_MOVE_SEMANTIC(FunctionContext);
776 ~FunctionContext() = default;
777
778 protected:
779 ir::ScriptFunctionFlags flags_ {ir::ScriptFunctionFlags::NONE};
780 };
781
782 class ArrowFunctionContext : public FunctionContext {
783 public:
ArrowFunctionContext(ParserImpl * parser,bool isAsync)784 explicit ArrowFunctionContext(ParserImpl *parser, bool isAsync)
785 : FunctionContext(parser, InitialFlags(parser->context_.Status()))
786 {
787 if (isAsync) {
788 AddFlag(ir::ScriptFunctionFlags::ASYNC);
789 }
790
791 AddFlag(ir::ScriptFunctionFlags::ARROW);
792 }
793
794 NO_COPY_SEMANTIC(ArrowFunctionContext);
795 NO_MOVE_SEMANTIC(ArrowFunctionContext);
796 ~ArrowFunctionContext() = default;
797
798 private:
InitialFlags(ParserStatus currentStatus)799 static ParserStatus InitialFlags(ParserStatus currentStatus)
800 {
801 return ParserStatus::FUNCTION | ParserStatus::ARROW_FUNCTION |
802 static_cast<ParserStatus>(currentStatus & (ParserStatus::ALLOW_SUPER | ParserStatus::ALLOW_SUPER_CALL |
803 ParserStatus::DISALLOW_ARGUMENTS));
804 }
805 };
806
807 } // namespace panda::es2panda::parser
808
809 #endif
810