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Auto merge of rust-lang#55738 - Mark-Simulacrum:stable-next, r=Mark-S…
…imulacrum 1.30.1 stable release I believe this includes all of the relevant pieces from rust-lang#55594. Backports all proceeded smoothly. cc @rust-lang/release
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| // Regression test for #52873. We used to ICE due to unexpected | ||
| // overflows when checking for "blanket impl inclusion". | ||
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| use std::marker::PhantomData; | ||
| use std::cmp::Ordering; | ||
| use std::ops::{Add, Mul}; | ||
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| pub type True = B1; | ||
| pub type False = B0; | ||
| pub type U0 = UTerm; | ||
| pub type U1 = UInt<UTerm, B1>; | ||
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| pub trait NonZero {} | ||
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| pub trait Bit { | ||
| } | ||
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| pub trait Unsigned { | ||
| } | ||
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| #[derive(Eq, PartialEq, Ord, PartialOrd, Clone, Copy, Hash, Debug, Default)] | ||
| pub struct B0; | ||
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| impl B0 { | ||
| #[inline] | ||
| pub fn new() -> B0 { | ||
| B0 | ||
| } | ||
| } | ||
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| #[derive(Eq, PartialEq, Ord, PartialOrd, Clone, Copy, Hash, Debug, Default)] | ||
| pub struct B1; | ||
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| impl B1 { | ||
| #[inline] | ||
| pub fn new() -> B1 { | ||
| B1 | ||
| } | ||
| } | ||
|
|
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| impl Bit for B0 { | ||
| } | ||
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|
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| impl Bit for B1 { | ||
| } | ||
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| impl NonZero for B1 {} | ||
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| pub trait PrivatePow<Y, N> { | ||
| type Output; | ||
| } | ||
| pub type PrivatePowOut<A, Y, N> = <A as PrivatePow<Y, N>>::Output; | ||
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| pub type Add1<A> = <A as Add<::B1>>::Output; | ||
| pub type Prod<A, B> = <A as Mul<B>>::Output; | ||
| pub type Square<A> = <A as Mul>::Output; | ||
| pub type Sum<A, B> = <A as Add<B>>::Output; | ||
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| #[derive(Eq, PartialEq, Ord, PartialOrd, Clone, Copy, Hash, Debug, Default)] | ||
| pub struct UTerm; | ||
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| impl UTerm { | ||
| #[inline] | ||
| pub fn new() -> UTerm { | ||
| UTerm | ||
| } | ||
| } | ||
|
|
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| impl Unsigned for UTerm { | ||
| } | ||
|
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| #[derive(Eq, PartialEq, Ord, PartialOrd, Clone, Copy, Hash, Debug, Default)] | ||
| pub struct UInt<U, B> { | ||
| _marker: PhantomData<(U, B)>, | ||
| } | ||
|
|
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| impl<U: Unsigned, B: Bit> UInt<U, B> { | ||
| #[inline] | ||
| pub fn new() -> UInt<U, B> { | ||
| UInt { | ||
| _marker: PhantomData, | ||
| } | ||
| } | ||
| } | ||
|
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| impl<U: Unsigned, B: Bit> Unsigned for UInt<U, B> { | ||
| } | ||
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| impl<U: Unsigned, B: Bit> NonZero for UInt<U, B> {} | ||
|
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| impl Add<B0> for UTerm { | ||
| type Output = UTerm; | ||
| fn add(self, _: B0) -> Self::Output { | ||
| UTerm | ||
| } | ||
| } | ||
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| impl<U: Unsigned, B: Bit> Add<B0> for UInt<U, B> { | ||
| type Output = UInt<U, B>; | ||
| fn add(self, _: B0) -> Self::Output { | ||
| UInt::new() | ||
| } | ||
| } | ||
|
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| impl<U: Unsigned> Add<U> for UTerm { | ||
| type Output = U; | ||
| fn add(self, _: U) -> Self::Output { | ||
| unsafe { ::std::mem::uninitialized() } | ||
| } | ||
| } | ||
|
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| impl<U: Unsigned, B: Bit> Mul<B0> for UInt<U, B> { | ||
| type Output = UTerm; | ||
| fn mul(self, _: B0) -> Self::Output { | ||
| UTerm | ||
| } | ||
| } | ||
|
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| impl<U: Unsigned, B: Bit> Mul<B1> for UInt<U, B> { | ||
| type Output = UInt<U, B>; | ||
| fn mul(self, _: B1) -> Self::Output { | ||
| UInt::new() | ||
| } | ||
| } | ||
|
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| impl<U: Unsigned> Mul<U> for UTerm { | ||
| type Output = UTerm; | ||
| fn mul(self, _: U) -> Self::Output { | ||
| UTerm | ||
| } | ||
| } | ||
|
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| impl<Ul: Unsigned, B: Bit, Ur: Unsigned> Mul<UInt<Ur, B>> for UInt<Ul, B0> | ||
| where | ||
| Ul: Mul<UInt<Ur, B>>, | ||
| { | ||
| type Output = UInt<Prod<Ul, UInt<Ur, B>>, B0>; | ||
| fn mul(self, _: UInt<Ur, B>) -> Self::Output { | ||
| unsafe { ::std::mem::uninitialized() } | ||
| } | ||
| } | ||
|
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| pub trait Pow<Exp> { | ||
| type Output; | ||
| } | ||
|
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| impl<X: Unsigned, N: Unsigned> Pow<N> for X | ||
| where | ||
| X: PrivatePow<U1, N>, | ||
| { | ||
| type Output = PrivatePowOut<X, U1, N>; | ||
| } | ||
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| impl<Y: Unsigned, X: Unsigned> PrivatePow<Y, U0> for X { | ||
| type Output = Y; | ||
| } | ||
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| impl<Y: Unsigned, X: Unsigned> PrivatePow<Y, U1> for X | ||
| where | ||
| X: Mul<Y>, | ||
| { | ||
| type Output = Prod<X, Y>; | ||
| } | ||
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| impl<Y: Unsigned, U: Unsigned, B: Bit, X: Unsigned> PrivatePow<Y, UInt<UInt<U, B>, B0>> for X | ||
| where | ||
| X: Mul, | ||
| Square<X>: PrivatePow<Y, UInt<U, B>>, | ||
| { | ||
| type Output = PrivatePowOut<Square<X>, Y, UInt<U, B>>; | ||
| } |
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