1 /**
2 * Copyright (c) 2021-2024 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 #include "ETSparser.h"
17 #include "ETSNolintParser.h"
18 #include <utility>
19
20 #include "macros.h"
21 #include "parser/parserFlags.h"
22 #include "parser/parserStatusContext.h"
23 #include "util/helpers.h"
24 #include "util/language.h"
25 #include "utils/arena_containers.h"
26 #include "varbinder/varbinder.h"
27 #include "varbinder/ETSBinder.h"
28 #include "lexer/lexer.h"
29 #include "lexer/ETSLexer.h"
30 #include "checker/types/ets/etsEnumType.h"
31 #include "ir/astNode.h"
32 #include "ir/base/classDefinition.h"
33 #include "ir/base/decorator.h"
34 #include "ir/base/catchClause.h"
35 #include "ir/base/classProperty.h"
36 #include "ir/base/scriptFunction.h"
37 #include "ir/base/methodDefinition.h"
38 #include "ir/base/classStaticBlock.h"
39 #include "ir/base/spreadElement.h"
40 #include "ir/expressions/identifier.h"
41 #include "ir/expressions/functionExpression.h"
42 #include "ir/statements/functionDeclaration.h"
43 #include "ir/statements/expressionStatement.h"
44 #include "ir/statements/classDeclaration.h"
45 #include "ir/statements/variableDeclarator.h"
46 #include "ir/statements/variableDeclaration.h"
47 #include "ir/expressions/dummyNode.h"
48 #include "ir/expressions/callExpression.h"
49 #include "ir/expressions/thisExpression.h"
50 #include "ir/expressions/typeofExpression.h"
51 #include "ir/expressions/memberExpression.h"
52 #include "ir/expressions/updateExpression.h"
53 #include "ir/expressions/arrowFunctionExpression.h"
54 #include "ir/expressions/unaryExpression.h"
55 #include "ir/expressions/yieldExpression.h"
56 #include "ir/expressions/awaitExpression.h"
57 #include "ir/expressions/literals/nullLiteral.h"
58 #include "ir/expressions/literals/numberLiteral.h"
59 #include "ir/expressions/literals/stringLiteral.h"
60 #include "ir/expressions/literals/undefinedLiteral.h"
61 #include "ir/module/importDeclaration.h"
62 #include "ir/module/importDefaultSpecifier.h"
63 #include "ir/module/importSpecifier.h"
64 #include "ir/module/exportSpecifier.h"
65 #include "ir/module/exportNamedDeclaration.h"
66 #include "ir/statements/assertStatement.h"
67 #include "ir/statements/blockStatement.h"
68 #include "ir/statements/ifStatement.h"
69 #include "ir/statements/labelledStatement.h"
70 #include "ir/statements/switchStatement.h"
71 #include "ir/statements/throwStatement.h"
72 #include "ir/statements/tryStatement.h"
73 #include "ir/statements/whileStatement.h"
74 #include "ir/statements/forOfStatement.h"
75 #include "ir/statements/doWhileStatement.h"
76 #include "ir/statements/breakStatement.h"
77 #include "ir/statements/debuggerStatement.h"
78 #include "ir/ets/etsLaunchExpression.h"
79 #include "ir/ets/etsClassLiteral.h"
80 #include "ir/ets/etsPrimitiveType.h"
81 #include "ir/ets/etsPackageDeclaration.h"
82 #include "ir/ets/etsReExportDeclaration.h"
83 #include "ir/ets/etsWildcardType.h"
84 #include "ir/ets/etsNewArrayInstanceExpression.h"
85 #include "ir/ets/etsTuple.h"
86 #include "ir/ets/etsFunctionType.h"
87 #include "ir/ets/etsNewClassInstanceExpression.h"
88 #include "ir/ets/etsNewMultiDimArrayInstanceExpression.h"
89 #include "ir/ets/etsScript.h"
90 #include "ir/ets/etsTypeReference.h"
91 #include "ir/ets/etsTypeReferencePart.h"
92 #include "ir/ets/etsNullishTypes.h"
93 #include "ir/ets/etsUnionType.h"
94 #include "ir/ets/etsImportSource.h"
95 #include "ir/ets/etsImportDeclaration.h"
96 #include "ir/ets/etsStructDeclaration.h"
97 #include "ir/ets/etsParameterExpression.h"
98 #include "ir/module/importNamespaceSpecifier.h"
99 #include "ir/ts/tsAsExpression.h"
100 #include "ir/ts/tsInterfaceDeclaration.h"
101 #include "ir/ts/tsEnumDeclaration.h"
102 #include "ir/ts/tsTypeParameterInstantiation.h"
103 #include "ir/ts/tsInterfaceBody.h"
104 #include "ir/ts/tsImportEqualsDeclaration.h"
105 #include "ir/ts/tsArrayType.h"
106 #include "ir/ts/tsQualifiedName.h"
107 #include "ir/ts/tsTypeReference.h"
108 #include "ir/ts/tsTypeParameter.h"
109 #include "ir/ts/tsInterfaceHeritage.h"
110 #include "ir/ts/tsFunctionType.h"
111 #include "ir/ts/tsClassImplements.h"
112 #include "ir/ts/tsEnumMember.h"
113 #include "ir/ts/tsTypeAliasDeclaration.h"
114 #include "ir/ts/tsTypeParameterDeclaration.h"
115 #include "ir/ts/tsNonNullExpression.h"
116 #include "ir/ts/tsThisType.h"
117 #include "generated/signatures.h"
118
119 namespace ark::es2panda::parser {
120 class FunctionContext;
121
122 using namespace std::literals::string_literals;
123
ParseTopLevelStatements()124 ArenaVector<ir::Statement *> ETSParser::ParseTopLevelStatements()
125 {
126 ArenaVector<ir::Statement *> statements(Allocator()->Adapter());
127 while (Lexer()->GetToken().Type() != lexer::TokenType::EOS) {
128 if (Lexer()->TryEatTokenType(lexer::TokenType::PUNCTUATOR_SEMI_COLON)) {
129 continue;
130 }
131 auto stmt = ParseTopLevelStatement();
132 GetContext().Status() &= ~ParserStatus::IN_AMBIENT_CONTEXT;
133 if (stmt != nullptr) {
134 statements.emplace_back(stmt);
135 }
136 }
137
138 return statements;
139 }
140
ValidateExportableStatement(ETSParser * parser,ir::Statement * stmt,ark::es2panda::ir::ModifierFlags memberModifiers)141 static ir::Statement *ValidateExportableStatement(ETSParser *parser, ir::Statement *stmt,
142 ark::es2panda::ir::ModifierFlags memberModifiers)
143 {
144 if (stmt != nullptr) {
145 if ((memberModifiers & ir::ModifierFlags::EXPORT_TYPE) != 0U &&
146 !(stmt->IsClassDeclaration() || stmt->IsTSInterfaceDeclaration() || stmt->IsTSTypeAliasDeclaration())) {
147 parser->ThrowSyntaxError("Can only type export class or interface!", stmt->Start());
148 }
149 stmt->AddModifier(memberModifiers);
150 }
151 return stmt;
152 }
153
ParseTopLevelDeclStatement(StatementParsingFlags flags)154 ir::Statement *ETSParser::ParseTopLevelDeclStatement(StatementParsingFlags flags)
155 {
156 auto [memberModifiers, startLoc] = ParseMemberModifiers();
157 if ((memberModifiers & (ir::ModifierFlags::EXPORTED)) != 0U &&
158 (Lexer()->GetToken().Type() == lexer::TokenType::PUNCTUATOR_MULTIPLY ||
159 Lexer()->GetToken().Type() == lexer::TokenType::PUNCTUATOR_LEFT_BRACE)) {
160 return ParseExport(startLoc, memberModifiers);
161 }
162
163 ir::Statement *result = nullptr;
164 auto token = Lexer()->GetToken();
165 switch (token.Type()) {
166 case lexer::TokenType::KEYW_FUNCTION: {
167 result = ParseFunctionDeclaration(false, memberModifiers);
168 result->SetStart(startLoc);
169 break;
170 }
171 case lexer::TokenType::KEYW_CONST: {
172 memberModifiers |= ir::ModifierFlags::CONST;
173 [[fallthrough]];
174 }
175 case lexer::TokenType::KEYW_LET: {
176 result = ParseStatement(flags);
177 break;
178 }
179 case lexer::TokenType::KEYW_NAMESPACE:
180 case lexer::TokenType::KEYW_STATIC:
181 case lexer::TokenType::KEYW_ABSTRACT:
182 case lexer::TokenType::KEYW_FINAL:
183 case lexer::TokenType::KEYW_ENUM:
184 case lexer::TokenType::KEYW_INTERFACE:
185 case lexer::TokenType::KEYW_CLASS: {
186 result = ParseTypeDeclaration(false);
187 break;
188 }
189 case lexer::TokenType::LITERAL_IDENT: {
190 result = ParseIdentKeyword();
191 if (result == nullptr && (memberModifiers & (ir::ModifierFlags::EXPORTED)) != 0U) {
192 return ParseExport(startLoc, memberModifiers);
193 }
194 break;
195 }
196 default: {
197 }
198 }
199
200 return ValidateExportableStatement(this, result, memberModifiers);
201 }
202
ParseTopLevelStatement()203 ir::Statement *ETSParser::ParseTopLevelStatement()
204 {
205 const auto flags = StatementParsingFlags::ALLOW_LEXICAL;
206 static const std::unordered_set<lexer::TokenType> ALLOWED_TOP_LEVEL_STMTS = {
207 lexer::TokenType::PUNCTUATOR_LEFT_BRACE,
208 lexer::TokenType::PUNCTUATOR_SEMI_COLON,
209 lexer::TokenType::KEYW_ASSERT,
210 lexer::TokenType::KEYW_IF,
211 lexer::TokenType::KEYW_DO,
212 lexer::TokenType::KEYW_FOR,
213 lexer::TokenType::KEYW_TRY,
214 lexer::TokenType::KEYW_WHILE,
215 lexer::TokenType::KEYW_BREAK,
216 lexer::TokenType::KEYW_CONTINUE,
217 lexer::TokenType::KEYW_THROW,
218 lexer::TokenType::KEYW_SWITCH,
219 lexer::TokenType::KEYW_DEBUGGER,
220 lexer::TokenType::LITERAL_IDENT,
221 };
222
223 auto result = ParseTopLevelDeclStatement(flags);
224 if (result == nullptr) {
225 auto const tokenType = Lexer()->GetToken().Type();
226 if (ALLOWED_TOP_LEVEL_STMTS.count(tokenType) != 0U) {
227 result = ParseStatement(flags);
228 } else {
229 ThrowUnexpectedToken(tokenType);
230 }
231 }
232 return result;
233 }
234
ParseTopLevelDeclaration()235 ArenaVector<ir::Statement *> ETSParser::ParseTopLevelDeclaration()
236 {
237 auto topStatements = ParseTopLevelStatements();
238 Lexer()->NextToken();
239 return topStatements;
240 }
241
ValidateLabeledStatement(lexer::TokenType type)242 void ETSParser::ValidateLabeledStatement(lexer::TokenType type)
243 {
244 if (type != lexer::TokenType::KEYW_DO && type != lexer::TokenType::KEYW_WHILE &&
245 type != lexer::TokenType::KEYW_FOR && type != lexer::TokenType::KEYW_SWITCH) {
246 ThrowSyntaxError("Label must be followed by a loop statement", Lexer()->GetToken().Start());
247 }
248 }
249
ValidateForInStatement()250 void ETSParser::ValidateForInStatement()
251 {
252 ThrowUnexpectedToken(lexer::TokenType::KEYW_IN);
253 }
254
ParseDebuggerStatement()255 ir::DebuggerStatement *ETSParser::ParseDebuggerStatement()
256 {
257 ThrowUnexpectedToken(lexer::TokenType::KEYW_DEBUGGER);
258 }
259
ParseFunctionStatement(const StatementParsingFlags flags)260 ir::Statement *ETSParser::ParseFunctionStatement([[maybe_unused]] const StatementParsingFlags flags)
261 {
262 ASSERT((flags & StatementParsingFlags::GLOBAL) == 0);
263 ThrowSyntaxError("Nested functions are not allowed");
264 }
265
ParseAssertStatement()266 ir::Statement *ETSParser::ParseAssertStatement()
267 {
268 lexer::SourcePosition startLoc = Lexer()->GetToken().Start();
269 Lexer()->NextToken();
270
271 ir::Expression *test = ParseExpression();
272 lexer::SourcePosition endLoc = test->End();
273 ir::Expression *second = nullptr;
274
275 if (Lexer()->GetToken().Type() == lexer::TokenType::PUNCTUATOR_COLON) {
276 Lexer()->NextToken(); // eat ':'
277 second = ParseExpression();
278 endLoc = second->End();
279 }
280
281 auto *asStatement = AllocNode<ir::AssertStatement>(test, second);
282 asStatement->SetRange({startLoc, endLoc});
283 ConsumeSemicolon(asStatement);
284
285 return asStatement;
286 }
287
ParseTryStatement()288 ir::Statement *ETSParser::ParseTryStatement()
289 {
290 lexer::SourcePosition startLoc = Lexer()->GetToken().Start();
291 Lexer()->NextToken(); // eat the 'try' keyword
292
293 if (Lexer()->GetToken().Type() != lexer::TokenType::PUNCTUATOR_LEFT_BRACE) {
294 ThrowSyntaxError("Unexpected token, expected '{'");
295 }
296
297 ir::BlockStatement *body = ParseBlockStatement();
298
299 ArenaVector<ir::CatchClause *> catchClauses(Allocator()->Adapter());
300
301 while (Lexer()->GetToken().KeywordType() == lexer::TokenType::KEYW_CATCH) {
302 ir::CatchClause *clause {};
303
304 clause = ParseCatchClause();
305
306 catchClauses.push_back(clause);
307 }
308
309 ir::BlockStatement *finalizer = nullptr;
310 if (Lexer()->GetToken().KeywordType() == lexer::TokenType::KEYW_FINALLY) {
311 Lexer()->NextToken(); // eat 'finally' keyword
312
313 finalizer = ParseBlockStatement();
314 }
315
316 if (catchClauses.empty() && finalizer == nullptr) {
317 ThrowSyntaxError("A try statement should contain either finally clause or at least one catch clause.",
318 startLoc);
319 }
320
321 lexer::SourcePosition endLoc = finalizer != nullptr ? finalizer->End() : catchClauses.back()->End();
322
323 ArenaVector<std::pair<compiler::LabelPair, const ir::Statement *>> finalizerInsertions(Allocator()->Adapter());
324
325 auto *tryStatement = AllocNode<ir::TryStatement>(body, std::move(catchClauses), finalizer, finalizerInsertions);
326 tryStatement->SetRange({startLoc, endLoc});
327 ConsumeSemicolon(tryStatement);
328
329 return tryStatement;
330 }
331
332 // NOLINTNEXTLINE(google-default-arguments)
ParseClassStatement(StatementParsingFlags flags,ir::ClassDefinitionModifiers modifiers,ir::ModifierFlags modFlags)333 ir::ClassDeclaration *ETSParser::ParseClassStatement([[maybe_unused]] StatementParsingFlags flags,
334 ir::ClassDefinitionModifiers modifiers, ir::ModifierFlags modFlags)
335 {
336 return ParseClassDeclaration(modifiers | ir::ClassDefinitionModifiers::ID_REQUIRED |
337 ir::ClassDefinitionModifiers::CLASS_DECL | ir::ClassDefinitionModifiers::LOCAL,
338 modFlags);
339 }
340
341 // NOLINTNEXTLINE(google-default-arguments)
ParseStructStatement(StatementParsingFlags flags,ir::ClassDefinitionModifiers modifiers,ir::ModifierFlags modFlags)342 ir::ETSStructDeclaration *ETSParser::ParseStructStatement([[maybe_unused]] StatementParsingFlags flags,
343 [[maybe_unused]] ir::ClassDefinitionModifiers modifiers,
344 [[maybe_unused]] ir::ModifierFlags modFlags)
345 {
346 ThrowSyntaxError("Illegal start of expression", Lexer()->GetToken().Start());
347 }
348
349 } // namespace ark::es2panda::parser
350