98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
#pragma once
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#include <memory>
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#include <string>
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#include <cassert>
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#include <ostream>
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#include <vector>
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#include "utils/underlying_cast.hpp"
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class Null;
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class Property
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{
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public:
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using sptr = std::shared_ptr<Property>;
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enum class Flags : unsigned
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{
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// Type | Mask
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// -----------+----------------------------------------
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// Null | 0000 0000 0000 0000 0000 0000 0000 0000
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// -----------+----------------------------------------
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// Bool | 0000 0000 0000 0000 0000 0000 0000 0001
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// + True | 0000 0000 0000 0000 0000 0000 0000 0011
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// + False | 0000 0000 0000 0000 0000 0000 0000 0101
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// -----------+----------------------------------------
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// String | 0000 0000 0000 0000 0000 0000 0000 1000
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// -----------+----------------------------------------
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// Number | 0000 0000 0000 0000 0000 0000 0001 0000
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// + Integral | 0000 0000 0000 0000 0000 0000 0011 0000
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// + Int32 | 0000 0000 0000 0000 0000 0000 0111 0000
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// + Int64 | 0000 0000 0000 0000 0000 0000 1011 0000
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// + Floating | 0000 0000 0000 0000 0000 0001 0001 0000
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// + Float | 0000 0000 0000 0000 0000 0011 0001 0000
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// + Double | 0000 0000 0000 0000 0000 0101 0001 0000
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// -----------+----------------------------------------
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// Array | 0000 0000 0000 0000 0001 0000 0000 0000
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// -----------+----------------------------------------
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Null = 0x0,
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Bool = 0x1,
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True = 0x2 | Bool,
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False = 0x4 | Bool,
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String = 0x8,
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Number = 0x10,
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Integral = 0x20 | Number,
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Int32 = 0x40 | Integral,
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Int64 = 0x80 | Integral,
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Floating = 0x100 | Number,
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Float = 0x200 | Floating,
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Double = 0x400 | Floating,
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Array = 0x1000,
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type_mask = 0xFFF
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};
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static const Null Null;
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Property(Flags flags);
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virtual bool operator==(const Property& other) const = 0;
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bool operator!=(const Property& other) const;
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template <class T>
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bool is() const
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{
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return underlying_cast(flags) & underlying_cast(T::type);
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}
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template <class T>
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T& as()
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{
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assert(this->is<T>());
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return *static_cast<T*>(this);
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}
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template <class T>
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const T& as() const
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{
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assert(this->is<T>());
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return *static_cast<const T*>(this);
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}
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virtual std::ostream& print(std::ostream& stream) const = 0;
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friend std::ostream& operator<<(std::ostream& stream, const Property& prop);
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const Flags flags;
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};
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using properties_t = std::vector<Property::sptr>;
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