XAttrs.h
author František Kučera <franta-hg@frantovo.cz>
Tue, 02 Jan 2024 17:50:43 +0100
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/**
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 * ShaderShark
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 * Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info)
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, version 3 of the License.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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 */
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#pragma once
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#include <memory>
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#include <string>
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#include "Buffer.h"
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class XAttrs {
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public:
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	class Null;
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	class Attribute {
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	public:
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		virtual ~Attribute();
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		const std::string getName();
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		const std::string getValue(bool reload = false);
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		bool exists(bool reload = false);
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		bool missing(bool reload = false);
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		Attribute& operator=(const std::string& value);
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		Attribute& operator=(const Attribute& value);
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		operator std::string();
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		friend std::ostream& operator<<(std::ostream& s, Attribute& a);
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		friend std::ostream& operator>>(Attribute& a, std::ostream& s);
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	private:
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		class Impl;
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		std::shared_ptr<Impl> impl;
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		Attribute();
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		friend XAttrs;
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		friend Null;
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	};
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	class Null : public Attribute {
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	public:
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		Null();
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	};
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	XAttrs(const std::string& fileName, const std::string& nameSpace = "user");
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	virtual ~XAttrs();
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	const std::string getFileName() const;
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	Attribute& operator[](std::string name);
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	Attribute& operator[](std::size_t index);
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	size_t size(bool reload = false);
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	Attribute* begin();
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	Attribute* end();
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	class Impl;
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	std::shared_ptr<Impl> impl;
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	friend Attribute;
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};