duplicateActionControlPlaneNameCheck.h

/*
Copyright 2024 Cisco Systems, 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.
*/
 
#ifndef FRONTENDS_P4_DUPLICATEACTIONCONTROLPLANENAMECHECK_H_
#define FRONTENDS_P4_DUPLICATEACTIONCONTROLPLANENAMECHECK_H_
 
#include <vector>
 
#include "ir/ir.h"
#include "ir/visitor.h"
 
namespace P4 {

class DuplicateActionControlPlaneNameCheck : public Transform {
    std::vector<cstring> stack;
    absl::flat_hash_map<cstring, const IR::Node *> actions;
 
 public:
    cstring getName(const IR::IDeclaration *decl);
 
    DuplicateActionControlPlaneNameCheck() {
        setName("DuplicateActionControlPlaneNameCheck");
        visitDagOnce = false;
    }
    const IR::Node *preorder(IR::P4Parser *parser) override {
        // There cannot be any action definitions inside a parser, so
        // do not traverse through its nodes.
        prune();
        return parser;
    }
 
    const IR::Node *preorder(IR::P4Control *control) override {
        stack.push_back(getName(control));
        return control;
    }
    const IR::Node *postorder(IR::P4Control *control) override {
        stack.pop_back();
        return control;
    }
 
    const IR::Node *preorder(IR::P4Table *table) override {
        // There cannot be any action definitions inside a table, so
        // do not traverse through its nodes.
        prune();
        return table;
    }
 
    void checkForDuplicateName(cstring name, const IR::Node *node);
 
    const IR::Node *postorder(IR::P4Action *action) override;
};
 
}  // namespace P4
 
#endif /* FRONTENDS_P4_DUPLICATEACTIONCONTROLPLANENAMECHECK_H_ */