pub use num_traits::FromPrimitive;
pub use std::option::Option;
macro_rules! enum_from_primitive_impl_ty {
($meth:ident, $ty:ty, $name:ident, $( $variant:ident )*) => {
#[allow(non_upper_case_globals, unused)]
fn $meth(n: $ty) -> $crate::enum_primitive::Option<Self> {
$( if n == $name::$variant as $ty {
$crate::enum_primitive::Option::Some($name::$variant)
} else )* {
$crate::enum_primitive::Option::None
}
}
};
}
#[macro_use(enum_from_primitive_impl_ty)]
macro_rules! enum_from_primitive_impl {
($name:ident, $( $variant:ident )*) => {
impl $crate::enum_primitive::FromPrimitive for $name {
enum_from_primitive_impl_ty! { from_i64, i64, $name, $( $variant )* }
enum_from_primitive_impl_ty! { from_u64, u64, $name, $( $variant )* }
}
};
}
#[macro_use(enum_from_primitive_impl)]
macro_rules! enum_from_primitive {
(
$( #[$enum_attr:meta] )*
enum $name:ident {
$( $( #[$variant_attr:meta] )* $variant:ident ),+
$( = $discriminator:expr, $(
$( #[$variant_two_attr:meta] )*
$variant_two:ident
),+ )*
}
) => {
$( #[$enum_attr] )*
enum $name {
$( $( #[$variant_attr] )* $variant ),+
$( = $discriminator, $(
$( #[$variant_two_attr] )* $variant_two
),+ )*
}
enum_from_primitive_impl! { $name, $( $variant )+ $( $( $variant_two )+ )* }
};
(
$( #[$enum_attr:meta] )*
enum $name:ident {
$( $(
$( #[$variant_attr:meta] )* $variant:ident
),+ = $discriminator:expr ),*
}
) => {
$( #[$enum_attr] )*
enum $name {
$( $( $( #[$variant_attr] )* $variant ),+ = $discriminator ),*
}
enum_from_primitive_impl! { $name, $( $( $variant )+ )* }
};
(
$( #[$enum_attr:meta] )*
enum $name:ident {
$( $( #[$variant_attr:meta] )* $variant:ident ),+
$( = $discriminator:expr, $(
$( #[$variant_two_attr:meta] )* $variant_two:ident
),+ )*,
}
) => {
$( #[$enum_attr] )*
enum $name {
$( $( #[$variant_attr] )* $variant ),+
$( = $discriminator, $(
$( #[$variant_two_attr] )* $variant_two
),+ )*,
}
enum_from_primitive_impl! { $name, $( $variant )+ $( $( $variant_two )+ )* }
};
(
$( #[$enum_attr:meta] )*
enum $name:ident {
$( $( $( #[$variant_attr:meta] )* $variant:ident ),+ = $discriminator:expr ),+,
}
) => {
$( #[$enum_attr] )*
enum $name {
$( $( $( #[$variant_attr] )* $variant ),+ = $discriminator ),+,
}
enum_from_primitive_impl! { $name, $( $( $variant )+ )+ }
};
(
$( #[$enum_attr:meta] )*
pub enum $name:ident {
$( $( #[$variant_attr:meta] )* $variant:ident ),+
$( = $discriminator:expr,
$( $( #[$variant_two_attr:meta] )* $variant_two:ident ),+
)*
}
) => {
$( #[$enum_attr] )*
pub enum $name {
$( $( #[$variant_attr] )* $variant ),+
$( = $discriminator,
$( $( #[$variant_two_attr] )* $variant_two ),+
)*
}
enum_from_primitive_impl! { $name, $( $variant )+ $( $( $variant_two )+ )* }
};
(
$( #[$enum_attr:meta] )*
pub enum $name:ident {
$( $( $( #[$variant_attr:meta] )* $variant:ident ),+ = $discriminator:expr ),*
}
) => {
$( #[$enum_attr] )*
pub enum $name {
$( $( $( #[$variant_attr] )* $variant ),+ = $discriminator ),*
}
enum_from_primitive_impl! { $name, $( $( $variant )+ )* }
};
(
$( #[$enum_attr:meta] )*
pub enum $name:ident {
$( $( #[$variant_attr:meta] )* $variant:ident ),+
$( = $discriminator:expr,
$( $( #[$variant_two_attr:meta] )* $variant_two:ident ),+
)*,
}
) => {
$( #[$enum_attr] )*
pub enum $name {
$( $( #[$variant_attr] )* $variant ),+
$( = $discriminator,
$( $( #[$variant_two_attr] )* $variant_two ),+
)*,
}
enum_from_primitive_impl! { $name, $( $variant )+ $( $( $variant_two )+ )* }
};
(
$( #[$enum_attr:meta] )*
pub enum $name:ident {
$( $( $( #[$variant_attr:meta] )* $variant:ident ),+ = $discriminator:expr ),+,
}
) => {
$( #[$enum_attr] )*
pub enum $name {
$( $( $( #[$variant_attr] )* $variant ),+ = $discriminator ),+,
}
enum_from_primitive_impl! { $name, $( $( $variant )+ )+ }
};
}