parameter.hpp

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//
// Struct parameter
//
// Copyright (c) 2015, Christof Metzger-Kraus, Helmholtz-Zentrum Berlin
// All rights reserved
//
// This file is part of OPAL.
//
// OPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// You should have received a copy of the GNU General Public License
// along with OPAL. If not, see <https://www.gnu.org/licenses/>.
//
#ifndef PARAMETER_HPP_
#define PARAMETER_HPP_
 
#include <optional>
#include "ast.hpp"
#include "value_parser.hpp"
 
#include <list>
 
#define BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
#define BOOST_SPIRIT_QI_DEBUG
 
namespace SDDS {
    struct parameter {
        enum attributes { NAME, SYMBOL, UNITS, DESCRIPTION, FORMAT_STRING, TYPE, FIXED_VALUE };
 
        unsigned int order_m;
        std::optional<std::string> name_m;
        std::optional<std::string> units_m;
        std::optional<std::string> description_m;
        std::optional<ast::datatype> type_m;
        ast::variant_t value_m;
        static unsigned int count_m;
 
        bool checkMandatories() const { return name_m && type_m; }
 
        template <attributes A>
        struct complainUnsupported {
            static bool apply() {
                std::string attributeString;
                switch (A) {
                    case SYMBOL:
                        attributeString = "symbol";
                        break;
                    case FORMAT_STRING:
                        attributeString = "format_string";
                        break;
                    case FIXED_VALUE:
                        attributeString = "fixed_value";
                        break;
                    default:
                        return true;
                }
                std::cerr << attributeString << " not supported yet" << std::endl;
                return false;
            }
        };
 
        bool parse(const std::string& input, size_t& pos) {
            parser::ValueParser parser(input, pos);
            switch (*this->type_m) {
                case ast::FLOAT: {
                    float f = 0.0f;
                    if (parser.parseFloat(f)) {
                        this->value_m = f;
                        pos           = parser.getPosition();
                        return true;
                    }
                    break;
                }
                case ast::DOUBLE: {
                    double d = 0.0;
                    if (parser.parseDouble(d)) {
                        this->value_m = d;
                        pos           = parser.getPosition();
                        return true;
                    }
                    break;
                }
                case ast::SHORT: {
                    short s = 0;
                    if (parser.parseShort(s)) {
                        this->value_m = s;
                        pos           = parser.getPosition();
                        return true;
                    }
                    break;
                }
                case ast::LONG: {
                    long l = 0;
                    if (parser.parseLong(l)) {
                        this->value_m = l;
                        pos           = parser.getPosition();
                        return true;
                    }
                    break;
                }
                case ast::CHARACTER: {
                    char c = '\0';
                    if (parser.parseChar(c)) {
                        this->value_m = c;
                        pos           = parser.getPosition();
                        return true;
                    }
                    break;
                }
                case ast::STRING: {
                    std::string s;
                    if (parser.parseString(s)) {
                        this->value_m = s;
                        pos           = parser.getPosition();
                        return true;
                    }
                    break;
                }
            }
            return false;
        }
    };
 
    struct parameterList : std::vector<parameter> {};
 
    template <typename Iterator>
    struct parameterOrder {
        template <typename, typename>
        struct result {
            typedef void type;
        };
 
        void operator()(parameter& param, Iterator) const { param.order_m = parameter::count_m++; }
    };
 
    inline std::ostream& operator<<(std::ostream& out, const parameter& param) {
        if (param.name_m) out << "name = " << *param.name_m << ", ";
        if (param.type_m) out << "type = " << *param.type_m << ", ";
        if (param.units_m) out << "units = " << *param.units_m << ", ";
        if (param.description_m) out << "description = " << *param.description_m << ", ";
        out << "order = " << param.order_m;
 
        return out;
    }
}  // namespace SDDS
 
#endif /* PARAMETER_HPP_ */