bjoernager/rust
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Driveby cleanup of the impl for negation, which had some kind of

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surprising casts. This version more obviously corresponds to the builtin
semantics.
This commit is contained in:
Niko Matsakis 2015-03-24 15:36:59 -04:00
parent d649292e60
commit d6466ff13a
2 changed files with 4 additions and 22 deletions
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24
src/libcore/ops.rs
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@ -485,6 +485,7 @@ pub trait Neg {
macro_rules! neg_impl {
($($t:ty)*) => ($(
#[stable(feature = "rust1", since = "1.0.0")]
#[allow(unsigned_negation)]
impl Neg for $t {
#[stable(feature = "rust1", since = "1.0.0")]
type Output = $t;
@ -498,28 +499,7 @@ macro_rules! neg_impl {
)*)
}
macro_rules! neg_uint_impl {
($t:ty, $t_signed:ty) => {
#[stable(feature = "rust1", since = "1.0.0")]
impl Neg for $t {
type Output = $t;
#[inline]
fn neg(self) -> $t { -(self as $t_signed) as $t }
}
forward_ref_unop! { impl Neg, neg for $t }
}
}
neg_impl! { isize i8 i16 i32 i64 f32 f64 }
neg_uint_impl! { usize, isize }
neg_uint_impl! { u8, i8 }
neg_uint_impl! { u16, i16 }
neg_uint_impl! { u32, i32 }
neg_uint_impl! { u64, i64 }
neg_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
/// The `Not` trait is used to specify the functionality of unary `!`.
///