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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| //--------------------------------------- | ||
| // uses | ||
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| #[cfg(feature = "serde-serialize")] | ||
| use serde::{Deserialize, Serialize}; | ||
| use utils_lib::{Getter, Sealed}; | ||
|
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| use super::DirectionIndexing; | ||
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| //--------------------------------------- | ||
| // struct definition | ||
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| /// Represent an axis in the space. There is `D` axis in dimension D. Contrary to | ||
| /// [`super::Direction`] and [`super::OrientedDirection`], an [`Axis`] | ||
| /// does not have an orientation. | ||
| #[derive(Sealed, Debug, Clone, Copy, Eq, PartialEq, Hash, PartialOrd, Ord)] | ||
| #[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))] | ||
| #[derive(Getter)] | ||
| pub struct Axis<const D: usize> { | ||
| /// index of the axis | ||
| #[get(Pub, Const, Copy, self_ty = "value")] | ||
| index: usize, | ||
| } | ||
|
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| //--------------------------------------- | ||
| // main impl block | ||
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| impl<const D: usize> Axis<D> { | ||
| /// Create a new axis. The index should be strictly smaller than `D` to return [`Some`]. | ||
| /// # Example | ||
| /// ``` | ||
| /// use lattice_qcd_rs::{error::ImplementationError, lattice::Axis}; | ||
| /// # fn main() -> Result<(), ImplementationError> { | ||
| /// assert!(Axis::<0>::new(0).is_none()); | ||
| /// assert!(Axis::<0>::new(4).is_none()); | ||
| /// | ||
| /// let axis = Axis::<1>::new(0).ok_or(ImplementationError::OptionWithUnexpectedNone)?; | ||
| /// assert_eq!(axis.index(), 0); | ||
| /// assert!(Axis::<1>::new(1).is_none()); | ||
| /// | ||
| /// let axis = Axis::<4>::new(3).ok_or(ImplementationError::OptionWithUnexpectedNone)?; | ||
| /// assert_eq!(axis.index(), 3); | ||
| /// assert!(Axis::<4>::new(4).is_none()); | ||
| /// assert!(Axis::<4>::new(6).is_none()); | ||
| /// # Ok(()) | ||
| /// # } | ||
| /// ``` | ||
| #[inline] | ||
| #[must_use] | ||
| #[allow(clippy::if_then_some_else_none)] // not possible for const fn | ||
| pub const fn new(index: usize) -> Option<Self> { | ||
| if index < D { | ||
| Some(Self { index }) | ||
| } else { | ||
| None | ||
| } | ||
| } | ||
|
|
||
| #[inline] | ||
| #[must_use] | ||
| #[allow(unsafe_code)] | ||
| pub(super) const unsafe fn new_unchecked(index: usize) -> Self { | ||
| Self { index } | ||
| } | ||
| } | ||
|
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| //--------------------------------------- | ||
| // conversion | ||
|
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| // with usize | ||
|
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| impl<const D: usize> From<Axis<D>> for usize { | ||
| #[inline] | ||
| fn from(value: Axis<D>) -> Self { | ||
| value.index() | ||
| } | ||
| } | ||
|
|
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| impl<const D: usize> AsRef<usize> for Axis<D> { | ||
| #[inline] | ||
| fn as_ref(&self) -> &usize { | ||
| &self.index | ||
| } | ||
| } | ||
|
|
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| // there is no AsMut as is it not safe to give a mut ref to the inner index | ||
|
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| //--------------------------------------- | ||
| // lattice indexing | ||
|
|
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| impl<const D: usize> DirectionIndexing for Axis<D> { | ||
| #[inline] | ||
| fn to_index(&self) -> usize { | ||
| self.index() | ||
| } | ||
|
|
||
| #[inline] | ||
| fn from_index(index: usize) -> Option<Self> { | ||
| Self::new(index) | ||
| } | ||
|
|
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| #[inline] | ||
| fn number_of_elements() -> usize { | ||
| D | ||
| } | ||
| } | ||
|
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| #[cfg(test)] | ||
| mod test { | ||
| use crate::{error::ImplementationError, lattice::Axis}; | ||
|
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| #[test] | ||
| fn axis() -> Result<(), ImplementationError> { | ||
| for i in 0..25 { | ||
| assert!(Axis::<0>::new(i).is_none()); | ||
| } | ||
| //------------------ | ||
| assert_eq!( | ||
| Axis::<1>::new(0).ok_or(ImplementationError::OptionWithUnexpectedNone)?, | ||
| Axis { index: 0 } | ||
| ); | ||
| for i in 1..25 { | ||
| assert!(Axis::<1>::new(i).is_none()); | ||
| } | ||
| //------------------ | ||
| for i in 0..4 { | ||
| assert_eq!( | ||
| Axis::<4>::new(i).ok_or(ImplementationError::OptionWithUnexpectedNone)?, | ||
| Axis { index: i } | ||
| ); | ||
| } | ||
| for i in 4..25 { | ||
| assert!(Axis::<4>::new(i).is_none()); | ||
| } | ||
|
|
||
| Ok(()) | ||
| } | ||
| } |
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