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#[macro_export]
macro_rules! const_enum {
($name:ty : $repr:ty) => {
impl ::std::convert::From<$repr> for $name {
fn from(u: $repr) -> Self {
unsafe { ::std::mem::transmute(u) }
}
}
};
}
pub const DEFAULT_MQTT_LEVEL: u8 = 4;
#[repr(u8)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Protocol {
MQTT(u8),
}
impl Protocol {
pub fn name(self) -> &'static str {
match self {
Protocol::MQTT(_) => "MQTT",
}
}
pub fn level(self) -> u8 {
match self {
Protocol::MQTT(level) => level,
}
}
}
impl Default for Protocol {
fn default() -> Self {
Protocol::MQTT(DEFAULT_MQTT_LEVEL)
}
}
#[repr(u8)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum QoS {
AtMostOnce = 0,
AtLeastOnce = 1,
ExactlyOnce = 2,
}
const_enum!(QoS: u8);