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// 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 "src/base/macros.h"
#include "src/base/optional.h"
#include "src/zone/zone-type-traits.h"
namespace v8 {
namespace 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 base::nullopt in case something went wrong.
static base::Optional<VariableProxy*> RewriteBody(
ParseInfo* info, Scope* scope, ZonePtrList<Statement>* body);
};
} // namespace internal
} // namespace v8
#endif // V8_PARSING_REWRITER_H_
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