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#pragma once
#include <compare>
template <class TSelf>
struct BasicEnum {
using Self = TSelf;
using ValueType = int;
int value;
BasicEnum()
: value{ 0 } {}
BasicEnum(int value)
: value{ value } {}
/// Comparsion between 2 values of enum. Useful for situations like `a == b` where both a and b are TSelf.
friend auto operator<=>(const TSelf& a, const TSelf& b) { return a.value <=> b.value; }
/// Comparsion between a enum and a raw value. Useful for situations like `a == TSelf::Option` where a is a enum and TSelf::Option is a raw value.
friend auto operator<=>(const TSelf& self, int value) { return self.value <=> value; }
operator int() const { return value; }
operator bool() const { return value; }
};
#define ENUM(Name) struct Name : public BasicEnum<Name>
#define ENUM_MEMBERS() \
enum Enum : int; \
operator Enum() const { return (Enum)value; } \
using BasicEnum<Self>::BasicEnum; \
enum Enum : int
template <class TSelf>
struct BasicFlag {
using Self = TSelf;
using ValueType = int;
int value;
BasicFlag()
: value{ 0 } {}
BasicFlag(int value)
: value{ value } {}
bool IsSet(TSelf mask) const { return (value & mask.value) == mask.value; }
bool IsSetExclusive(TSelf mask) const { return value == mask.value; }
void Set(TSelf mask, bool state) {
if (state) {
value = (int)(value | mask.value);
} else {
value = (int)(value & ~mask.value);
}
}
/// Comparsion between 2 values of flag. Useful for situations like `a == b` where both a and b are TSelf.
friend bool operator==(const TSelf& a, const TSelf& b) { return a.value == b.value; }
friend auto operator<=>(const TSelf& a, const TSelf& b) { return a.value <=> b.value; }
/// Comparsion between a flag and a raw value. Useful for situations like `a == TSelf::Option` where a is a flag and TSelf::Option is a raw value.
friend bool operator==(const TSelf& self, int value) { return self.value == value; }
friend auto operator<=>(const TSelf& self, int value) { return self.value <=> value; }
friend TSelf operator&(const TSelf& a, const TSelf& b) { return TSelf(a.value & b.value); }
friend TSelf operator|(const TSelf& a, const TSelf& b) { return TSelf(a.value | b.value); }
friend TSelf operator^(const TSelf& a, const TSelf& b) { return TSelf(a.value ^ b.value); }
TSelf operator~() const { return TSelf(~value); }
TSelf& operator&=(int that) {
value = value & that;
return *this;
}
TSelf& operator|=(int that) {
value = value | that;
return *this;
}
TSelf& operator^=(int that) {
value = value ^ that;
return *this;
}
};
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