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Side by Side Diff: src/preparser.h

Issue 915383002: Parser / PreParser: trivial unifications (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: . Created 5 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_PREPARSER_H 5 #ifndef V8_PREPARSER_H
6 #define V8_PREPARSER_H 6 #define V8_PREPARSER_H
7 7
8 #include "src/v8.h" 8 #include "src/v8.h"
9 9
10 #include "src/bailout-reason.h" 10 #include "src/bailout-reason.h"
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165 enum AllowEvalOrArgumentsAsIdentifier { 165 enum AllowEvalOrArgumentsAsIdentifier {
166 kAllowEvalOrArguments, 166 kAllowEvalOrArguments,
167 kDontAllowEvalOrArguments 167 kDontAllowEvalOrArguments
168 }; 168 };
169 169
170 enum Mode { 170 enum Mode {
171 PARSE_LAZILY, 171 PARSE_LAZILY,
172 PARSE_EAGERLY 172 PARSE_EAGERLY
173 }; 173 };
174 174
175 enum VariableDeclarationContext {
176 kStatementListItem,
177 kStatement,
178 kForStatement
179 };
180
181 // If a list of variable declarations includes any initializers.
182 enum VariableDeclarationProperties { kHasInitializers, kHasNoInitializers };
183
175 class Checkpoint; 184 class Checkpoint;
176 class ObjectLiteralCheckerBase; 185 class ObjectLiteralCheckerBase;
177 186
178 // --------------------------------------------------------------------------- 187 // ---------------------------------------------------------------------------
179 // FunctionState and BlockState together implement the parser's scope stack. 188 // FunctionState and BlockState together implement the parser's scope stack.
180 // The parser's current scope is in scope_. BlockState and FunctionState 189 // The parser's current scope is in scope_. BlockState and FunctionState
181 // constructors push on the scope stack and the destructors pop. They are also 190 // constructors push on the scope stack and the destructors pop. They are also
182 // used to hold the parser's per-function and per-block state. 191 // used to hold the parser's per-function and per-block state.
183 class BlockState BASE_EMBEDDED { 192 class BlockState BASE_EMBEDDED {
184 public: 193 public:
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1188 public: 1197 public:
1189 struct Type { 1198 struct Type {
1190 // TODO(marja): To be removed. The Traits object should contain all the data 1199 // TODO(marja): To be removed. The Traits object should contain all the data
1191 // it needs. 1200 // it needs.
1192 typedef PreParser* Parser; 1201 typedef PreParser* Parser;
1193 1202
1194 // PreParser doesn't need to store generator variables. 1203 // PreParser doesn't need to store generator variables.
1195 typedef void GeneratorVariable; 1204 typedef void GeneratorVariable;
1196 1205
1197 typedef int AstProperties; 1206 typedef int AstProperties;
1198 typedef Vector<PreParserIdentifier> ParameterIdentifierVector;
1199 1207
1200 // Return types for traversing functions. 1208 // Return types for traversing functions.
1201 typedef PreParserIdentifier Identifier; 1209 typedef PreParserIdentifier Identifier;
1202 typedef PreParserExpression Expression; 1210 typedef PreParserExpression Expression;
1203 typedef PreParserExpression YieldExpression; 1211 typedef PreParserExpression YieldExpression;
1204 typedef PreParserExpression FunctionLiteral; 1212 typedef PreParserExpression FunctionLiteral;
1205 typedef PreParserExpression ClassLiteral; 1213 typedef PreParserExpression ClassLiteral;
1206 typedef PreParserExpression ObjectLiteralProperty; 1214 typedef PreParserExpression ObjectLiteralProperty;
1207 typedef PreParserExpression Literal; 1215 typedef PreParserExpression Literal;
1208 typedef PreParserExpressionList ExpressionList; 1216 typedef PreParserExpressionList ExpressionList;
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1550 FunctionKind kind, ParserRecorder* log); 1558 FunctionKind kind, ParserRecorder* log);
1551 1559
1552 private: 1560 private:
1553 friend class PreParserTraits; 1561 friend class PreParserTraits;
1554 1562
1555 // These types form an algebra over syntactic categories that is just 1563 // These types form an algebra over syntactic categories that is just
1556 // rich enough to let us recognize and propagate the constructs that 1564 // rich enough to let us recognize and propagate the constructs that
1557 // are either being counted in the preparser data, or is important 1565 // are either being counted in the preparser data, or is important
1558 // to throw the correct syntax error exceptions. 1566 // to throw the correct syntax error exceptions.
1559 1567
1560 enum VariableDeclarationContext {
1561 kSourceElement,
1562 kStatement,
1563 kForStatement
1564 };
1565
1566 // If a list of variable declarations includes any initializers.
1567 enum VariableDeclarationProperties {
1568 kHasInitializers,
1569 kHasNoInitializers
1570 };
1571
1572 // All ParseXXX functions take as the last argument an *ok parameter 1568 // All ParseXXX functions take as the last argument an *ok parameter
1573 // which is set to false if parsing failed; it is unchanged otherwise. 1569 // which is set to false if parsing failed; it is unchanged otherwise.
1574 // By making the 'exception handling' explicit, we are forced to check 1570 // By making the 'exception handling' explicit, we are forced to check
1575 // for failure at the call sites. 1571 // for failure at the call sites.
1576 Statement ParseStatementListItem(bool* ok); 1572 Statement ParseStatementListItem(bool* ok);
1577 void ParseStatementList(int end_token, bool* ok); 1573 void ParseStatementList(int end_token, bool* ok);
1578 Statement ParseStatement(bool* ok); 1574 Statement ParseStatement(bool* ok);
1579 Statement ParseFunctionDeclaration(bool* ok); 1575 Statement ParseFunctionDeclaration(bool* ok);
1580 Statement ParseClassDeclaration(bool* ok); 1576 Statement ParseClassDeclaration(bool* ok);
1581 Statement ParseBlock(bool* ok); 1577 Statement ParseBlock(bool* ok);
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3082 *ok = false; 3078 *ok = false;
3083 return; 3079 return;
3084 } 3080 }
3085 has_seen_constructor_ = true; 3081 has_seen_constructor_ = true;
3086 return; 3082 return;
3087 } 3083 }
3088 } 3084 }
3089 } } // v8::internal 3085 } } // v8::internal
3090 3086
3091 #endif // V8_PREPARSER_H 3087 #endif // V8_PREPARSER_H
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