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Implement Arbitrary for nonzero integers #79

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merged 2 commits into from Mar 29, 2021
Merged

Implement Arbitrary for nonzero integers #79

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45215f4
Implement Arbitrary for nonzero integers
AljoschaMeyer Mar 25, 2021
4edc0c3
Appease the linter
AljoschaMeyer Mar 25, 2021
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33 changes: 33 additions & 0 deletions src/lib.rs
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Expand Up @@ -37,6 +37,8 @@ pub mod size_hint;
use core::cell::{Cell, RefCell, UnsafeCell};
use core::iter;
use core::mem;
use core::num::{NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroIsize};
use core::num::{NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
use core::ops::{Range, RangeBounds, RangeFrom, RangeInclusive, RangeTo, RangeToInclusive};
use core::str;
use core::time::Duration;
Expand Down Expand Up @@ -1010,6 +1012,37 @@ impl<'a, A: Arbitrary<'a>> Arbitrary<'a> for ::std::num::Wrapping<A> {
}
}

macro_rules! implement_nonzero_int {
($nonzero:ty, $int:ty) => {
impl<'a> Arbitrary<'a> for $nonzero {
fn arbitrary(u: &mut Unstructured<'a>) -> Result<Self> {
match Self::new(<$int as Arbitrary<'a>>::arbitrary(u)?) {
Some(n) => Ok(n),
None => Err(Error::IncorrectFormat),
}
}

#[inline]
fn size_hint(depth: usize) -> (usize, Option<usize>) {
<$int as Arbitrary<'a>>::size_hint(depth)
}
}
};
}

implement_nonzero_int! { NonZeroI8, i8 }
implement_nonzero_int! { NonZeroI16, i16 }
implement_nonzero_int! { NonZeroI32, i32 }
implement_nonzero_int! { NonZeroI64, i64 }
implement_nonzero_int! { NonZeroI128, i128 }
implement_nonzero_int! { NonZeroIsize, isize }
implement_nonzero_int! { NonZeroU8, u8 }
implement_nonzero_int! { NonZeroU16, u16 }
implement_nonzero_int! { NonZeroU32, u32 }
implement_nonzero_int! { NonZeroU64, u64 }
implement_nonzero_int! { NonZeroU128, u128 }
implement_nonzero_int! { NonZeroUsize, usize }

#[cfg(test)]
mod test {
use super::*;
Expand Down