conditionals.h

/* Copyright 2013-present Barefoot Networks, Inc.
 *
 * 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.
 */
 
/*
 * Antonin Bas (antonin@barefootnetworks.com)
 *
 */
 
#ifndef BM_BM_SIM_CONDITIONALS_H_
#define BM_BM_SIM_CONDITIONALS_H_
 
#include <memory>
#include <string>
#include <utility>
 
#include "phv.h"
#include "control_flow.h"
#include "expressions.h"
 
namespace bm {
 
class Conditional
  : public ControlFlowNode, public Expression {
 public:
  Conditional(const std::string &name, p4object_id_t id)
    : ControlFlowNode(name, id) {}
  Conditional(const std::string &name, p4object_id_t id,
              std::unique_ptr<SourceInfo> source_info)
    : ControlFlowNode(name, id, std::move(source_info)) {}
 
  bool eval(const PHV &phv) const {
    return eval_bool(phv);
  }
 
  void set_next_node_if_true(ControlFlowNode *next_node) {
    true_next = next_node;
  }
 
  void set_next_node_if_false(ControlFlowNode *next_node) {
    false_next = next_node;
  }
 
  // return pointer to next control flow node
  const ControlFlowNode *operator()(Packet *pkt) const override;
 
  Conditional(const Conditional &other) = delete;
  Conditional &operator=(const Conditional &other) = delete;
 
  Conditional(Conditional &&other) /*noexcept*/ = default;
  Conditional &operator=(Conditional &&other) /*noexcept*/ = default;
 
 private:
  ControlFlowNode *true_next{nullptr};
  ControlFlowNode *false_next{nullptr};
};
 
}  // namespace bm
 
#endif  // BM_BM_SIM_CONDITIONALS_H_