ClickHouse/dbms/include/DB/Storages/MergeTree/BoolMask.h
2014-04-07 20:29:25 +04:00

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#pragma once
/// Множество значений булевой переменной. То есть два булевых значения: может ли быть true, может ли быть false.
struct BoolMask
{
bool can_be_true;
bool can_be_false;
BoolMask() {}
BoolMask(bool can_be_true_, bool can_be_false_) : can_be_true(can_be_true_), can_be_false(can_be_false_) {}
BoolMask operator &(const BoolMask & m)
{
return BoolMask(can_be_true && m.can_be_true, can_be_false || m.can_be_false);
}
BoolMask operator |(const BoolMask & m)
{
return BoolMask(can_be_true || m.can_be_true, can_be_false && m.can_be_false);
}
BoolMask operator !()
{
return BoolMask(can_be_false, can_be_true);
}
};