pixiv_downloader/src/ext/flagset.rs

use flagset::FlagSet;
use flagset::Flags;

pub trait ToFlagSet<T: Flags> {
    fn to_flag_set(&self) -> FlagSet<T>;
    fn to_bits(&self) -> T::Type {
        self.to_flag_set().bits()
    }
}

impl<T: Flags> ToFlagSet<T> for T
where
    FlagSet<T>: From<T>,
{
    fn to_flag_set(&self) -> FlagSet<T> {
        FlagSet::from(self.clone())
    }
}

impl<T: Flags> ToFlagSet<T> for FlagSet<T> {
    fn to_flag_set(&self) -> FlagSet<T> {
        self.clone()
    }
}

impl<T: Flags> ToFlagSet<T> for Option<T>
where
    FlagSet<T>: From<T>,
{
    fn to_flag_set(&self) -> FlagSet<T> {
        match self {
            Some(s) => FlagSet::from(s.clone()),
            None => FlagSet::default(),
        }
    }
}