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macro_rules! u8_enum {
(
$(#[$attr:meta])*
$vis:vis enum $name:ident $(= $default:ident)?;
$(
$(#[$variant_attr:meta])*
$variant:ident = $discrim:literal
),+$(,)?
) => {
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[derive(::num_enum::TryFromPrimitive, ::num_enum::IntoPrimitive)]
#[derive(::serde::Serialize, ::serde::Deserialize)]
#[serde(into = "u8")]
#[repr(u8)]
$(#[$attr])*
$vis enum $name {$(
$(#[$variant_attr])*
$variant = $discrim
),+}
$(impl Default for $name { fn default() -> Self { Self::$default } })?
}
}
macro_rules! string_enum {
(
$(#[$attr:meta])*
$vis:vis enum $name:ident $(= $default:ident)?;
$(
$(#[$variant_attr:meta])*
$variant:ident $(= $discrim:literal)?
),+$(,)?
) => {
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[derive(::serde::Serialize, ::serde::Deserialize)]
#[serde(try_from = "String", into = "&'static str")]
$(#[$attr])*
$vis enum $name {$( $(#[$variant_attr])* $variant ),+}
impl $name {
pub fn as_str(&self) -> &'static str {
match self {
$(Self::$variant => stringify!($variant)),+
}
}
}
impl ::std::str::FromStr for $name {
type Err = String;
fn from_str(s: &str) -> ::std::result::Result<Self, String> {
match s {
$(stringify!($variant) $( | $discrim)? => Ok(Self::$variant),)+
s => Err(format!("Invalid {} value: {:?}", stringify!($name), s)),
}
}
}
impl ::std::convert::From<$name> for &'static str {
fn from(value: $name) -> Self {
match value {
$(
$name::$variant => {
let s = $($discrim; let _ = )? stringify!($variant);
s
}
),+
}
}
}
impl ::std::fmt::Display for $name {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
f.write_str(self.as_str())
}
}
impl ::std::convert::TryFrom<String> for $name {
type Error = String;
fn try_from(s: String) -> std::result::Result<Self, String> {
s.as_str().parse()
}
}
$(impl Default for $name { fn default() -> Self { Self::$default } })?
}
}
macro_rules! option_struct {
(
$(#[$attr:meta])*
$vis:vis struct $name:ident;
$(
$(#[$field_attr:meta])*
$field_vis:vis $field:ident: $type:ty
),+$(,)?
) => {
#[derive(Serialize, Deserialize)]
$(#[$attr])*
$vis struct $name {$(
#[serde(default, skip_serializing_if = "Option::is_none")]
$(#[$field_attr])*
$field_vis $field: Option<$type>,
)*}
}
}