/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#pragma once

#include "cmConfigure.h" // IWYU pragma: keep

#include <set>

#include "cmListFileCache.h"

class cmGeneratorTarget;

/** One edge in the global target dependency graph.

    It may be marked as a 'link' or 'util' edge or both.  */

class cmTargetDepend

{

  cmGeneratorTarget const* Target;

  // The set order depends only on the Target, so we use

  // mutable members to achieve a map with set syntax.

  mutable bool Link = false;

  mutable bool Util = false;

  mutable bool Cross = false;

  mutable cmListFileBacktrace Backtrace;

public:

  cmTargetDepend(cmGeneratorTarget const* t)

    : Target(t)

  {

  }

  operator cmGeneratorTarget const*() const { return this->Target; }

  cmGeneratorTarget const* operator->() const { return this->Target; }

  cmGeneratorTarget const& operator*() const { return *this->Target; }

  friend bool operator<(cmTargetDepend const& l, cmTargetDepend const& r)

  {

    return l.Target < r.Target;

  }

  void SetType(bool strong) const

  {

    if (strong) {

      this->Util = true;

    } else {

      this->Link = true;

    }

  }

  void SetCross(bool cross) const { this->Cross = cross; }

  void SetBacktrace(cmListFileBacktrace const& bt) const

  {

    this->Backtrace = bt;

  }

  bool IsLink() const { return this->Link; }

  bool IsUtil() const { return this->Util; }

  bool IsCross() const { return this->Cross; }

  cmListFileBacktrace const& GetBacktrace() const { return this->Backtrace; }

};

/** Unordered set of (direct) dependencies of a target. */

class cmTargetDependSet : public std::set<cmTargetDepend>

{

};