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CLK/Configurable/Configurable.hpp

89 lines
2.4 KiB
C++

//
// Configurable.h
// Clock Signal
//
// Created by Thomas Harte on 17/11/2017.
// Copyright © 2017 Thomas Harte. All rights reserved.
//
#ifndef Configurable_h
#define Configurable_h
#include <map>
#include <memory>
#include <string>
#include <vector>
namespace Configurable {
/*!
The Option class hierarchy provides a way for components, machines, etc, to provide a named
list of typed options to which they can respond.
*/
struct Option {
std::string long_name;
std::string short_name;
virtual ~Option() {}
Option(const std::string &long_name, const std::string &short_name) : long_name(long_name), short_name(short_name) {}
};
struct BooleanOption: public Option {
BooleanOption(const std::string &long_name, const std::string &short_name) : Option(long_name, short_name) {}
};
struct ListOption: public Option {
std::vector<std::string> options;
ListOption(const std::string &long_name, const std::string &short_name, const std::vector<std::string> &options) : Option(long_name, short_name), options(options) {}
};
struct BooleanSelection;
struct ListSelection;
/*!
Selections are responses to Options.
*/
struct Selection {
virtual ~Selection() {}
virtual ListSelection *list_selection() = 0;
virtual BooleanSelection *boolean_selection() = 0;
};
struct BooleanSelection: public Selection {
bool value;
ListSelection *list_selection();
BooleanSelection *boolean_selection();
BooleanSelection(bool value) : value(value) {}
};
struct ListSelection: public Selection {
std::string value;
ListSelection *list_selection();
BooleanSelection *boolean_selection();
ListSelection(const std::string value) : value(value) {}
};
using SelectionSet = std::map<std::string, std::unique_ptr<Selection>>;
/*!
A Configuratble provides the options that it responds to and allows selections to be set.
*/
struct Device {
virtual std::vector<std::unique_ptr<Option>> get_options() = 0;
virtual void set_selections(const SelectionSet &selection_by_option) = 0;
virtual SelectionSet get_accurate_selections() = 0;
virtual SelectionSet get_user_friendly_selections() = 0;
};
template <typename T> T *selection(const Configurable::SelectionSet &selections_by_option, const std::string &name) {
auto selection = selections_by_option.find(name);
if(selection == selections_by_option.end()) return nullptr;
return dynamic_cast<T *>(selection->second.get());
}
}
#endif /* Configurable_h */