predicate.h

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/* Copyright 2026 Stanford University, NVIDIA Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef __LEGION_PREDICATE_H__
#define __LEGION_PREDICATE_H__
 
#include "legion/api/types.h"
 
namespace Legion {
 
  class Predicate : public Unserializable {
  public:
    static const Predicate TRUE_PRED;
    static const Predicate FALSE_PRED;
  public:
    Predicate(void);
    Predicate(const Predicate& p);
    Predicate(Predicate&& p) noexcept;
    explicit Predicate(bool value);
    ~Predicate(void);
  protected:
    FRIEND_ALL_RUNTIME_CLASSES
    Internal::PredicateImpl* impl;
    // Only the runtime should be allowed to make these
    explicit Predicate(Internal::PredicateImpl* impl);
  public:
    Predicate& operator=(const Predicate& p);
    Predicate& operator=(Predicate&& p) noexcept;
    inline bool operator==(const Predicate& p) const;
    inline bool operator<(const Predicate& p) const;
    inline bool operator!=(const Predicate& p) const;
    inline bool exists(void) const { return (impl != nullptr); }
  private:
    bool const_value;
  };
 
}  // namespace Legion
 
#include "legion/api/predicate.inl"
 
#endif  // __LEGION_PREDICATE_H__