parsers.h

/*
 * Copyright (c) 2017 VMware Inc. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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 BACKENDS_GRAPHS_PARSERS_H_
#define BACKENDS_GRAPHS_PARSERS_H_
 
#include "frontends/common/resolveReferences/referenceMap.h"
#include "graphs.h"
#include "ir/ir.h"
#include "lib/cstring.h"
#include "lib/nullstream.h"
#include "lib/safe_vector.h"
 
namespace P4::graphs {
 
class ParserGraphs : public Graphs {
 protected:
    struct TransitionEdge {
        const IR::ParserState *sourceState;
        const IR::ParserState *destState;
        cstring label;
 
        TransitionEdge(const IR::ParserState *source, const IR::ParserState *dest, cstring label)
            : sourceState(source), destState(dest), label(label) {}
    };
 
    std::map<const IR::P4Parser *, safe_vector<const TransitionEdge *>> transitions;
    std::map<const IR::P4Parser *, safe_vector<const IR::ParserState *>> states;
 
 public:
    ParserGraphs(P4::ReferenceMap *refMap, std::filesystem::path graphsDir);
 
    Graph *CreateSubGraph(Graph &currentSubgraph, const cstring &name);
    void postorder(const IR::P4Parser *parser) override;
    void postorder(const IR::ParserState *state) override;
    void postorder(const IR::PathExpression *expression) override;
    void postorder(const IR::SelectExpression *expression) override;
 
    std::vector<Graph *> parserGraphsArray{};
 
 private:
    P4::ReferenceMap *refMap;
    const cstring graphsDir;
    std::optional<cstring> instanceName{};
};
 
}  // namespace P4::graphs
 
#endif /* BACKENDS_GRAPHS_PARSERS_H_ */