trace.hpp

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//
// Copyright (C) 2014, 2015 Ableton AG, Berlin. All rights reserved.
//
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// copy of this software and associated documentation files (the "Software"),
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// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
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#pragma once

#include <atria/meta/utils.hpp>
#include <iostream>

namespace atria {
namespace prelude {

template <typename T>
auto trace(T&& x, const std::string& message)
  -> T&&
{
  std::cerr << message << " " << x << std::endl;
  return std::forward<T>(x);
}

struct tracer
{
  std::string message;

  template <typename T>
  auto operator() (T&& x)
    -> ABL_DECLTYPE_RETURN(
    trace(std::forward<T>(x), message))
};

} // namespace prelude

using prelude::tracer;
using prelude::trace;

} // namespace atria