124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
// Copyright (C) 2024 Jérôme "SirLynix" Leclercq (lynix680@gmail.com)
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// This file is part of the "Nazara Engine - Core module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_CORE_PARAMETERFILE_HPP
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#define NAZARA_CORE_PARAMETERFILE_HPP
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#include <NazaraUtils/Prerequisites.hpp>
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#include <Nazara/Core/Config.hpp>
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#include <NazaraUtils/FixedVector.hpp>
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#include <NazaraUtils/FunctionRef.hpp>
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#include <NazaraUtils/FunctionTraits.hpp>
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#include <NazaraUtils/TypeList.hpp>
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#include <functional>
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#include <string>
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#include <type_traits>
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#include <variant>
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namespace Nz
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{
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class ParameterFileSection;
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class Stream;
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// TOOD: Move to NazaraUtils
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template<typename T>
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concept Functor = IsFunctor_v<T>;
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class NAZARA_CORE_API ParameterFile
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{
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friend ParameterFileSection;
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public:
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inline ParameterFile(Stream& stream);
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ParameterFile(const ParameterFile&) = delete;
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ParameterFile(ParameterFile&&) = delete;
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~ParameterFile() = default;
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template<typename... Args> void Parse(Args&&... args);
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ParameterFile& operator=(const ParameterFile&) = delete;
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ParameterFile& operator=(ParameterFile&&) = delete;
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struct Identifier
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{
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std::string value;
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};
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struct List_t {};
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struct OptionalBlock_t {};
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static constexpr List_t List{};
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static constexpr OptionalBlock_t OptionalBlock{};
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private:
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using ValueHandler = std::function<void(ParameterFile& file)>;
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struct KeyValue
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{
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std::string_view key;
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ValueHandler handler;
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};
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struct ClosingCurlyBracket {};
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struct EndOfStream {};
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struct OpenCurlyBracket {};
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struct String
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{
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std::string value; //< has to be a string because of text parsing
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};
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using Token = std::variant<std::monostate, ClosingCurlyBracket, EndOfStream, Identifier, OpenCurlyBracket, String>;
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Token Advance();
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void ConsumeChar(std::size_t count = 1);
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template<typename EndToken, typename... Args> void HandleInner(Args&&... args);
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Token& PeekToken();
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char PeekCharacter(std::size_t advance = 1);
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template<typename T> T& Peek();
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template<typename T> T Read();
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template<typename T> T ReadValue();
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// Handlers
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template<std::size_t N, typename T, typename... Rest> ValueHandler BuildBlockHandler(FixedVector<KeyValue, N>* keyValues, T* value, Rest&&... rest);
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template<std::size_t N, Functor T, typename... Rest> ValueHandler BuildBlockHandler(FixedVector<KeyValue, N>* keyValues, T&& handler, Rest&&... rest);
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template<std::size_t N, typename O, typename... Args, typename... Rest> ValueHandler BuildBlockHandler(FixedVector<KeyValue, N>* keyValues, void(O::* method)(Args...), O* object, Rest&&... rest);
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template<std::size_t N, typename... Args, typename... Rest> ValueHandler BuildBlockHandler(FixedVector<KeyValue, N>* keyValues, FunctionRef<void(Args...)> handler, Rest&&... rest);
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template<std::size_t N, typename K, typename... Rest> void BuildKeyValues(FixedVector<KeyValue, N>* keyValues, K&& key, Rest&&... rest);
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template<typename V, typename... Rest> ValueHandler GetSingleHandler(V&& value, Rest&&... rest);
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template<typename T> static std::string_view BuildBlockKey(T&& key);
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template<typename T> static constexpr bool ShouldIgnoreImpl = std::is_same_v<T, List_t> || std::is_same_v<T, OptionalBlock_t>;
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template<typename T> static constexpr bool ShouldIgnore = ShouldIgnoreImpl<std::decay_t<T>>;
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std::size_t m_bufferOffset;
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std::string m_buffer;
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Stream& m_stream;
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Token m_nextToken;
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unsigned int m_currentLine;
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};
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class ParameterFileSection
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{
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friend ParameterFile;
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public:
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ParameterFileSection(const ParameterFileSection&) = default;
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template<typename... Args> void Block(Args&&... args);
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private:
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inline ParameterFileSection(ParameterFile& file);
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ParameterFile& m_file;
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};
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}
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#include <Nazara/Core/ParameterFile.inl>
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#endif // NAZARA_CORE_PARAMETERFILE_HPP
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