💿🐜 Antkeeper source code
https://antkeeper.com
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148 lines
4.4 KiB
148 lines
4.4 KiB
/*
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* Copyright (C) 2017-2019 Christopher J. Howard
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*
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* This file is part of Antkeeper Source Code.
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*
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* Antkeeper Source Code 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, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper Source Code 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 Antkeeper Source Code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CONSOLE_HPP
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#define CONSOLE_HPP
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#include <functional>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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/**
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* Parses an argument string into a typed value.
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*/
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template<class T>
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class ArgumentParser
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{
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public:
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static T parse(const std::string& argument);
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};
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template<>
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int ArgumentParser<int>::parse(const std::string& argument);
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template<>
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unsigned int ArgumentParser<unsigned int>::parse(const std::string& argument);
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template<>
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long ArgumentParser<long>::parse(const std::string& argument);
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template<>
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unsigned long ArgumentParser<unsigned long>::parse(const std::string& argument);
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template<>
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float ArgumentParser<float>::parse(const std::string& argument);
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template<>
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double ArgumentParser<double>::parse(const std::string& argument);
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template<>
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std::string ArgumentParser<std::string>::parse(const std::string& argument);
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/**
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* Parses an argument vector of strings into a tuple of typed values.
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*/
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class ArgumentVectorParser
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{
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public:
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template<class... Args>
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static std::tuple<Args...> parse(const std::vector<std::string>& arguments)
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{
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return parse<Args...>(arguments, std::make_index_sequence<sizeof...(Args)>{});
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}
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private:
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template <class... Args, std::size_t... index>
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static std::tuple<Args...> parse(const std::vector<std::string>& arguments, std::index_sequence<index...>)
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{
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return {ArgumentParser<Args>::parse(arguments[index])...};
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}
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};
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class CommandLinker
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{
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public:
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/**
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* Links a function and its arguments together into a single callable object.
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*/
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template<class... Args>
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static std::function<void()> link(const std::function<void(Args...)>& function, const std::vector<std::string>& arguments)
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{
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// Parse argument vectors and store in a tuple
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auto parsedArguments = ArgumentVectorParser::parse<Args...>(arguments);
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// Return callable object which will invoke the function with the parsed arguments
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return std::bind
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(
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[function, parsedArguments]()
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{
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std::apply(function, parsedArguments);
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}
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);
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}
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};
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/**
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*
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*/
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class CommandInterpreter
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{
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public:
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/**
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* Registers a command.
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*
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* @param name Name used to invoke the command.
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* @param function Function associated with the command.
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*/
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template <class... Args>
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void registerCommand(const std::string& name, const std::function<void(Args...)>& function);
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template <class... Args>
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void registerCommand(const std::string& name, void(*function)(Args...));
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/**
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* Interprets a line of text as a function call, returning the interpreted command name, argument vector, and callable function object.
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*
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* @param line Line of text to be interpreted.
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*/
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std::tuple<std::string, std::vector<std::string>, std::function<void()>> interpret(const std::string& line);
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private:
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template <class Function, class Linker>
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void addCommandLinker(const std::string& name, const Function& function, const Linker& linker);
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// A command name-keyed map of command linkers
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std::unordered_map<std::string, std::function<std::function<void()>(const std::vector<std::string>&)>> linkers;
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};
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template <class... Args>
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void CommandInterpreter::registerCommand(const std::string& name, const std::function<void(Args...)>& function)
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{
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addCommandLinker(name, function, CommandLinker::link<Args...>);
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}
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template <class... Args>
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void CommandInterpreter::registerCommand(const std::string& name, void(*function)(Args...))
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{
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addCommandLinker(name, function, CommandLinker::link<Args...>);
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}
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template <class Function, class Linker>
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void CommandInterpreter::addCommandLinker(const std::string& name, const Function& function, const Linker& linker)
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{
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linkers[name] = std::bind(linker, function, std::placeholders::_1);
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}
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#endif // CONSOLE_HPP
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