| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_PARSING_REWRITER_H_ |
| #define V8_PARSING_REWRITER_H_ |
| |
| #include <optional> |
| |
| #include "src/base/macros.h" |
| #include "src/zone/zone-type-traits.h" |
| |
| namespace v8::internal { |
| |
| class AstValueFactory; |
| class Isolate; |
| class ParseInfo; |
| class Parser; |
| class DeclarationScope; |
| class Scope; |
| class Statement; |
| class VariableProxy; |
| |
| class Rewriter { |
| public: |
| // Rewrite top-level code (ECMA 262 "programs") so as to conservatively |
| // include an assignment of the value of the last statement in the code to |
| // a compiler-generated temporary variable wherever needed. |
| // |
| // Assumes code has been parsed and scopes have been analyzed. Mutates the |
| // AST, so the AST should not continue to be used in the case of failure. |
| V8_EXPORT_PRIVATE static bool Rewrite(ParseInfo* info); |
| |
| // Helper that does the actual re-writing. Extracted so REPL scripts can |
| // rewrite the body but then use the ".result" VariableProxy to resolve |
| // the async promise that is the result of running a REPL script. |
| // Returns std::nullopt in case something went wrong. |
| static std::optional<VariableProxy*> RewriteBody( |
| ParseInfo* info, Scope* scope, ZonePtrList<Statement>* body); |
| }; |
| |
| } // namespace v8::internal |
| |
| #endif // V8_PARSING_REWRITER_H_ |