rewriter.h revision 8b112d2025046f85ef7f6be087c6129c872ebad2
18b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch// Copyright 2011 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifndef V8_REWRITER_H_ 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#define V8_REWRITER_H_ 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 34f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdochclass CompilationInfo; 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass Rewriter { 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 38f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch // Rewrite top-level code (ECMA 262 "programs") so as to conservatively 39f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch // include an assignment of the value of the last statement in the code to 40f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch // a compiler-generated temporary variable wherever needed. 41f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch // 42f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch // Assumes code has been parsed and scopes have been analyzed. Mutates the 43f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch // AST, so the AST should not continue to be used in the case of failure. 44f87a203d89e1bbb6708282e0b64dbd13d59b723dBen Murdoch static bool Rewrite(CompilationInfo* info); 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} } // namespace v8::internal 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // V8_REWRITER_H_ 51