src/util/hash.h

   1 /*********************                                                        */
   2 /*! \file hash.h
   3  ** \verbatim
   4  ** Original author: cconway
   5  ** Major contributors: mdeters
   6  ** Minor contributors (to current version): none
   7  ** This file is part of the CVC4 prototype.
   8  ** Copyright (c) 2009, 2010  The Analysis of Computer Systems Group (ACSys)
   9  ** Courant Institute of Mathematical Sciences
  10  ** New York University
  11  ** See the file COPYING in the top-level source directory for licensing
  12  ** information.\endverbatim
  13  **
  14  ** \brief [[ Add one-line brief description here ]]
  15  **
  16  ** [[ Add lengthier description here ]]
  17  ** \todo document this file
  18  **/
  19
  20 #ifndef __CVC4__HASH_H_
  21 #define __CVC4__HASH_H_
  22
  23 #include <ext/hash_map>
  24 namespace std { using namespace __gnu_cxx; }
  25
  26 namespace CVC4 {
  27
  28 struct StringHashFunction {
  29   size_t operator()(const std::string& str) const {
  30     return std::hash<const char*>()(str.c_str());
  31   }
  32 };
  33
  34 }
  35
  36 #endif /* __CVC4__HASH_H_ */