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Add all possible AsPrimitive for NotNan #124

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Merged
merged 1 commit into from
Mar 21, 2023
Merged

Add all possible AsPrimitive for NotNan #124

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22 changes: 22 additions & 0 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -470,12 +470,27 @@ impl<T: NumCast> NumCast for OrderedFloat<T> {
}

macro_rules! impl_as_primitive {
(@ (NotNan<$T: ty>) => $(#[$cfg:meta])* impl (NotNan<$U: ty>) ) => {
$(#[$cfg])*
impl AsPrimitive<NotNan<$U>> for NotNan<$T> {
#[inline] fn as_(self) -> NotNan<$U> {
// Safety: `NotNan` guarantees that the value is not NaN.
unsafe {NotNan::new_unchecked(self.0 as $U) }
}
}
};
(@ ($T: ty) => $(#[$cfg:meta])* impl (NotNan<$U: ty>) ) => {
$(#[$cfg])*
impl AsPrimitive<NotNan<$U>> for $T {
#[inline] fn as_(self) -> NotNan<$U> { NotNan(self as $U) }
}
};
(@ (NotNan<$T: ty>) => $(#[$cfg:meta])* impl ($U: ty) ) => {
$(#[$cfg])*
impl AsPrimitive<$U> for NotNan<$T> {
#[inline] fn as_(self) -> $U { self.0 as $U }
}
};
(@ (OrderedFloat<$T: ty>) => $(#[$cfg:meta])* impl (OrderedFloat<$U: ty>) ) => {
$(#[$cfg])*
impl AsPrimitive<OrderedFloat<$U>> for OrderedFloat<$T> {
Expand All @@ -502,6 +517,9 @@ macro_rules! impl_as_primitive {
impl_as_primitive!((OrderedFloat<f32>) => { (OrderedFloat<f32>), (OrderedFloat<f64>) });
impl_as_primitive!((OrderedFloat<f64>) => { (OrderedFloat<f32>), (OrderedFloat<f64>) });

impl_as_primitive!((NotNan<f32>) => { (NotNan<f32>), (NotNan<f64>) });
impl_as_primitive!((NotNan<f64>) => { (NotNan<f32>), (NotNan<f64>) });

impl_as_primitive!((u8) => { (OrderedFloat<f32>), (OrderedFloat<f64>) });
impl_as_primitive!((i8) => { (OrderedFloat<f32>), (OrderedFloat<f64>) });
impl_as_primitive!((u16) => { (OrderedFloat<f32>), (OrderedFloat<f64>) });
Expand Down Expand Up @@ -529,6 +547,10 @@ impl_as_primitive!((isize) => { (NotNan<f32>), (NotNan<f64>) });
impl_as_primitive!((OrderedFloat<f32>) => { (u8), (u16), (u32), (u64), (usize), (i8), (i16), (i32), (i64), (isize), (f32), (f64) });
impl_as_primitive!((OrderedFloat<f64>) => { (u8), (u16), (u32), (u64), (usize), (i8), (i16), (i32), (i64), (isize), (f32), (f64) });

impl_as_primitive!((NotNan<f32>) => { (u8), (u16), (u32), (u64), (usize), (i8), (i16), (i32), (i64), (isize), (f32), (f64) });
impl_as_primitive!((NotNan<f64>) => { (u8), (u16), (u32), (u64), (usize), (i8), (i16), (i32), (i64), (isize), (f32), (f64) });


impl<T: FromPrimitive> FromPrimitive for OrderedFloat<T> {
fn from_i64(n: i64) -> Option<Self> {
T::from_i64(n).map(OrderedFloat)
Expand Down