// 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_ namespace v8 { namespace internal { class AstValueFactory; class DoExpression; class Isolate; class ParseInfo; class Parser; class DeclarationScope; class Scope; 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. static bool Rewrite(ParseInfo* info); // Rewrite a list of statements, using the same rules as a top-level program, // to ensure identical behaviour of completion result. The temporary is added // to the closure scope of the do-expression, which matches the closure scope // of the outer scope (the do-expression itself runs in a block scope, not a // closure scope). This closure scope needs to be passed in since the // do-expression could have dropped its own block scope. static bool Rewrite(Parser* parser, DeclarationScope* closure_scope, DoExpression* expr, AstValueFactory* factory); }; } // namespace internal } // namespace v8 #endif // V8_PARSING_REWRITER_H_