if_rewrite.h

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// Author(s): Wieger Wesselink
// Copyright: see the accompanying file COPYING or copy at
// https://github.com/mCRL2org/mCRL2/blob/master/COPYING
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
 
#ifndef MCRL2_LPS_IF_REWRITE_H
#define MCRL2_LPS_IF_REWRITE_H
 
#include "mcrl2/data/rewriters/if_rewriter.h"
#include "mcrl2/lps/builder.h"
 
namespace mcrl2 {
 
namespace lps {
 
namespace detail {
 
struct if_rewrite_builder: public lps::data_expression_builder<if_rewrite_builder>
{
  typedef lps::data_expression_builder<if_rewrite_builder> super;
  using super::apply;
  using super::update;
 
  data::if_rewriter r;
 
  template <class T>
  void apply(T& result, const data::data_expression& x)
  {
    result = r(x);
  }
};
 
} // namespace detail
 
template <typename T>
void if_rewrite(T& x, typename std::enable_if<!std::is_base_of<atermpp::aterm, T>::value>::type* = nullptr)
{
  detail::if_rewrite_builder f;
  f.update(x);
}
 
template <typename T>
T if_rewrite(const T& x, typename std::enable_if<std::is_base_of<atermpp::aterm, T>::value>::type* = nullptr)
{
  T result;
  detail::if_rewrite_builder f;
  f.apply(result, x);
  return result;
}
 
} // namespace lps
 
} // namespace mcrl2
 
#endif // MCRL2_LPS_IF_REWRITE_H