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#pragma once
#include <chrono>
#include <cstdint>
#include <string>
class BaseValue {
public:
enum Kind {
KD_Numeric,
KD_Text,
KD_DateTime,
/// An unspecified type, otherwise known as "any" in some contexts.
KindInvalid,
KindCount = KindInvalid,
};
private:
Kind mKind;
public:
BaseValue(Kind kind);
virtual ~BaseValue() = default;
BaseValue(const BaseValue&) = delete;
BaseValue& operator=(const BaseValue&) = delete;
BaseValue(BaseValue&&) = default;
BaseValue& operator=(BaseValue&&) = default;
Kind GetKind() const;
};
class NumericValue : public BaseValue {
private:
double mValue;
public:
static bool IsInstance(const BaseValue* value);
NumericValue();
std::string GetString() const;
int64_t GetInt() const;
double GetValue() const;
void SetValue(double value);
};
class TextValue : public BaseValue {
private:
std::string mValue;
public:
static bool IsInstance(const BaseValue* value);
TextValue();
const std::string& GetValue() const;
void SetValue(const std::string& value);
};
class DateTimeValue : public BaseValue {
private:
std::chrono::time_point<std::chrono::system_clock> mValue;
public:
static bool IsInstance(const BaseValue* value);
DateTimeValue();
std::string GetString() const;
const std::chrono::time_point<std::chrono::system_clock>& GetValue() const;
void SetValue(const std::chrono::time_point<std::chrono::system_clock>& value);
};
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