mirror of
https://github.com/JakeHillion/object-introspection.git
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91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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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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#ifndef INCLUDED_OI_INTROSPECTIONRESULT_H
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#define INCLUDED_OI_INTROSPECTIONRESULT_H 1
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#include <oi/exporters/inst.h>
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#include <oi/result/Element.h>
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#include <oi/types/dy.h>
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#include <cstdint>
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#include <list>
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#include <optional>
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#include <span>
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#include <stack>
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#include <string_view>
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#include <vector>
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namespace oi {
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class IntrospectionResult {
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public:
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class const_iterator {
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friend class IntrospectionResult;
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public:
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bool operator==(const const_iterator& that) const;
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bool operator!=(const const_iterator& that) const;
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const result::Element& operator*() const;
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const result::Element* operator->() const;
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const_iterator& operator++();
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const_iterator operator++(int);
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private:
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using stack_t =
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std::stack<exporters::inst::Inst, std::vector<exporters::inst::Inst>>;
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const_iterator(std::vector<uint8_t>::const_iterator data,
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exporters::inst::Inst type);
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const_iterator(std::vector<uint8_t>::const_iterator data);
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std::vector<uint8_t>::const_iterator data_;
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stack_t stack_;
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std::optional<result::Element> next_;
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std::vector<std::string_view> type_path_;
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// This field could be more space efficient as these strings are primarily
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// empty. They are used when the string isn't stored in the .rodata section,
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// currently when performing key capture. It needs reference stability as we
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// keep views in type_path_. A std::unique_ptr<std::string> would be an
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// improvement but it isn't copyable. A string type with size fixed at
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// construction would also be good.
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std::list<std::string> dynamic_type_path_;
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// We cannot track the position in the iteration solely by the underlying
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// iterator as some fields do not extract data (for example, primitives).
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// Track the number of increment operations as well to get an accurate
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// equality check.
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uint64_t increments_ = 0;
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};
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IntrospectionResult(std::vector<uint8_t> buf, exporters::inst::Inst inst);
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const_iterator begin() const;
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const_iterator cbegin() const;
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const_iterator end() const;
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const_iterator cend() const;
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private:
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std::vector<uint8_t> buf_;
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exporters::inst::Inst inst_;
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};
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} // namespace oi
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#include <oi/IntrospectionResult-inl.h>
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#endif
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