1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/enum-ordinalize/src/traits.rs b/vendor/enum-ordinalize/src/traits.rs
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+++ b/vendor/enum-ordinalize/src/traits.rs
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+/// This trait provides an enum with the ability to not only obtain the ordinal values of its variants but also allows for the construction of enums from an ordinal value.
+///
+/// ```rust
+/// use enum_ordinalize::Ordinalize;
+///
+/// #[repr(u8)]
+/// enum E {
+///     A,
+///     B,
+/// }
+///
+/// impl Ordinalize for E {
+///     type VariantType = u8;
+///
+///     const VALUES: &'static [Self::VariantType] = &[0, 1];
+///     const VARIANTS: &'static [Self] = &[E::A, E::B];
+///     const VARIANT_COUNT: usize = 2;
+///
+///     #[inline]
+///     unsafe fn from_ordinal_unsafe(number: Self::VariantType) -> Self {
+///         ::core::mem::transmute(number)
+///     }
+///
+///     #[inline]
+///     fn from_ordinal(number: Self::VariantType) -> Option<Self> {
+///         match number {
+///             0 => Some(Self::A),
+///             1 => Some(Self::B),
+///             _ => None,
+///         }
+///     }
+///
+///     #[inline]
+///     fn ordinal(&self) -> Self::VariantType {
+///         match self {
+///             Self::A => 0,
+///             Self::B => 1,
+///         }
+///     }
+/// }
+/// ```
+pub trait Ordinalize: Sized + 'static {
+    /// The type of the values of the variants.
+    type VariantType;
+
+    /// The count of variants.
+    const VARIANT_COUNT: usize;
+
+    /// List of this enum's variants.
+    const VARIANTS: &'static [Self];
+
+    /// List of values for all variants of this enum.
+    const VALUES: &'static [Self::VariantType];
+
+    /// Obtain a variant based on an integer number.
+    ///
+    /// # Safety
+    /// You have to ensure that the input integer number can correspond to a variant on your own.
+    unsafe fn from_ordinal_unsafe(number: Self::VariantType) -> Self;
+
+    /// Obtain a variant based on an integer number.
+    fn from_ordinal(number: Self::VariantType) -> Option<Self>
+    where
+        Self: Sized;
+
+    /// Retrieve the integer number of this variant.
+    fn ordinal(&self) -> Self::VariantType;
+}