chaiscript_tracer.hpp

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// This file is distributed under the BSD License.
// See "license.txt" for details.
// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
// Copyright 2009-2017, Jason Turner (jason@emptycrate.com)
// http://www.chaiscript.com
 
#ifndef CHAISCRIPT_TRACER_HPP_
#define CHAISCRIPT_TRACER_HPP_
 
namespace chaiscript {
  namespace eval {
 
 
    struct Noop_Tracer_Detail
    {
      template<typename T>
        void trace(const chaiscript::detail::Dispatch_State &, const AST_Node_Impl<T> *)
        {
        }
    };
 
    template<typename ... T>
      struct Tracer : T...
    {
      Tracer() = default;
      explicit Tracer(T ... t)
        : T(std::move(t))...
      {
      }
 
      void do_trace(const chaiscript::detail::Dispatch_State &ds, const AST_Node_Impl<Tracer<T...>> *node) {
        (void)std::initializer_list<int>{ (static_cast<T&>(*this).trace(ds, node), 0)... };
      }
 
      static void trace(const chaiscript::detail::Dispatch_State &ds, const AST_Node_Impl<Tracer<T...>> *node) {
        ds->get_parser().get_tracer<Tracer<T...>>().do_trace(ds, node);
      }
    };
 
    typedef Tracer<Noop_Tracer_Detail> Noop_Tracer;
 
  }
}
 
#endif