Program Listing for File knx_value.h

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#pragma once

#include <cstdint>
#include <ctime>

class KNXValue
{
    public:
        KNXValue(bool value);
        KNXValue(uint8_t value);
        KNXValue(uint16_t value);
        KNXValue(uint32_t value);
        KNXValue(uint64_t value);
        KNXValue(int8_t value);
        KNXValue(int16_t value);
        KNXValue(int32_t value);
        KNXValue(int64_t value);
        KNXValue(double value);
        KNXValue(const char* value);
        KNXValue(struct tm value);
        KNXValue(float value);

        operator bool() const;
        operator uint8_t() const;
        operator uint16_t() const;
        operator uint32_t() const;
        operator uint64_t() const;
        operator int8_t() const;
        operator int16_t() const;
        operator int32_t() const;
        operator int64_t() const;
        operator double() const;
        operator const char* () const;
        operator struct tm() const;
        operator float() const;

        KNXValue& operator=(const bool value);
        KNXValue& operator=(const uint8_t value);
        KNXValue& operator=(const uint16_t value);
        KNXValue& operator=(const uint32_t value);
        KNXValue& operator=(const uint64_t value);
        KNXValue& operator=(const int8_t value);
        KNXValue& operator=(const int16_t value);
        KNXValue& operator=(const int32_t value);
        KNXValue& operator=(const int64_t value);
        KNXValue& operator=(const double value);
        KNXValue& operator=(const char* value);
        KNXValue& operator=(const struct tm value);
        KNXValue& operator=(const float value);

    private:
        bool boolValue() const;
        uint8_t ucharValue() const;
        uint16_t ushortValue() const;
        uint32_t uintValue() const;
        uint64_t ulongValue() const;
        int8_t charValue() const;
        int16_t shortValue() const;
        int32_t intValue() const;
        int64_t longValue() const;
        double doubleValue() const;
        const char* stringValue() const;
        struct tm timeValue() const;


        union Value
        {
            bool boolValue;
            uint8_t ucharValue;
            uint16_t ushortValue;
            uint32_t uintValue;
            uint64_t ulongValue;
            int8_t charValue;
            int16_t shortValue;
            int32_t intValue;
            int64_t longValue;
            double doubleValue;
            const char* stringValue;
            struct tm timeValue;
        };
        enum ValueType
        {
            BoolType,
            UCharType,
            UShortType,
            UIntType,
            ULongType,
            CharType,
            ShortType,
            IntType,
            LongType,
            DoubleType,
            StringType,
            TimeType,
        };

        ValueType _type;
        Value _value;
};