enumInstance.h

/*
 * SPDX-FileCopyrightText: 2013 Barefoot Networks, Inc.
 * Copyright 2013-present Barefoot Networks, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef FRONTENDS_P4_ENUMINSTANCE_H_
#define FRONTENDS_P4_ENUMINSTANCE_H_
 
#include "frontends/p4/typeMap.h"
#include "ir/ir.h"
#include "methodInstance.h"
 
namespace P4 {
 
// helps resolving references to compile-time enum fields, e.g., X.a
class EnumInstance : public InstanceBase {
 protected:
    EnumInstance(const IR::ID name, const IR::Type *type, const P4::TypeMap *typeMap)
        : name(name), type(type), typeMap(typeMap) {}
 
 public:
    const IR::ID name;
    const IR::Type *type;
    const P4::TypeMap *typeMap;

    static EnumInstance *resolve(const IR::Expression *expression, const P4::TypeMap *typeMap);
    bool equals(const EnumInstance *other) const {
        return typeMap->equivalent(type, other->type) && name.name == other->name.name;
    }
 
    DECLARE_TYPEINFO(EnumInstance, InstanceBase);
};

class SimpleEnumInstance : public EnumInstance {
 public:
    SimpleEnumInstance(const IR::Type_Enum *type, const IR::ID name, const P4::TypeMap *typeMap)
        : EnumInstance(name, type, typeMap) {}
 
    DECLARE_TYPEINFO(SimpleEnumInstance, EnumInstance);
};

class SerEnumInstance : public EnumInstance {
 public:
    const IR::Expression *value;
    SerEnumInstance(const IR::Type_SerEnum *type, const IR::ID name, const IR::Expression *value,
                    const P4::TypeMap *typeMap)
        : EnumInstance(name, type, typeMap), value(value) {}
 
    DECLARE_TYPEINFO(SerEnumInstance, EnumInstance);
};
 
}  // namespace P4
 
#endif /* FRONTENDS_P4_ENUMINSTANCE_H_ */