69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/**
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* @file src/common/visitor/ast_id_mapper.h
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*
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* Copyright (c) 2021-2024 Bartek Kryza <bkryza@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "common/model/diagram_element.h"
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#include <cstdint>
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#include <map>
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namespace clanguml::common::visitor {
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/**
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* @brief Mapping between Clang AST identifier and `clang-uml` unique ids
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*
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* Since identifiers provided by Clang AST are not transferable between
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* translation units (i.e. the same class can have a different id when visited
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* from different translation units), we need global identifiers which are
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* the same among all translation units.
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*
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* Currently they are calculated as hashes from the fully qualified string
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* representation of the type.
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*
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* This class allows to store mappings between Clang local identifiers
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* in current translation unit and the global identifiers for the element.
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*/
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class ast_id_mapper {
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public:
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using id_t = common::id_t;
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ast_id_mapper() = default;
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/**
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* Add id mapping.
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*
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* @param ast_id Clang's local AST id.
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* @param global_id Global element id.
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*/
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void add(int64_t ast_id, id_t global_id);
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/**
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* Get global element id based on it's local Clang AST id, if exists.
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*
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* @param ast_id Clang's local AST id.
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* @return Global id, if exists.
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*/
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std::optional<id_t> get_global_id(common::id_t ast_id);
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private:
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std::map</* Clang AST translation unit local id */ int64_t,
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/* clang-uml global id */ id_t>
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id_map_;
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};
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} // namespace clanguml::common::visitor
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