Enum rustc_trait_selection::infer::region_constraints::Constraint

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pub enum Constraint<'tcx> {
    VarSubVar(RegionVid, RegionVid),
    RegSubVar(&RegionKind, RegionVid),
    VarSubReg(RegionVid, &RegionKind),
    RegSubReg(&RegionKind, &RegionKind),
}

Expand description

Represents a constraint that influences the inference process.

Variants

`VarSubVar(RegionVid, RegionVid)`

A region variable is a subregion of another.

`RegSubVar(&RegionKind, RegionVid)`

A concrete region is a subregion of region variable.

`VarSubReg(RegionVid, &RegionKind)`

A region variable is a subregion of a concrete region. This does not directly affect inference, but instead is checked after inference is complete.

`RegSubReg(&RegionKind, &RegionKind)`

A constraint where neither side is a variable. This does not directly affect inference, but instead is checked after inference is complete.

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for Constraint

impl<'tcx> Send for Constraint

impl<'tcx> Sync for Constraint

impl<'tcx> Unpin for Constraint

impl<'tcx> UnwindSafe for Constraint

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
T: Copy,

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pub fn allocate_on(self, arena: &'a Arena) -> &'a mut T

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pub fn allocate_from_iter(
arena: &'a Arena,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘ
Notable traits for &mut [u8 ]
`impl<'_> Write for &mut [u8]impl<'_> Read for &[u8]`

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impl<T> Borrow<T> for T where
T: ?Sized,

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pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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impl<T, U> Into for T where
U: From<T>,

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pub fn into(self) -> U

Performs the conversion.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

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pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes

Size for each variant:

VarSubVar: 8 bytes
RegSubVar: 12 bytes
VarSubReg: 12 bytes
RegSubReg: 20 bytes

Enum rustc_trait_selection::infer::region_constraints::Constraint

Variants

`VarSubVar(RegionVid, RegionVid)`

`RegSubVar(&RegionKind, RegionVid)`

`VarSubReg(RegionVid, &RegionKind)`

`RegSubReg(&RegionKind, &RegionKind)`

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for Constraint

impl<'tcx> Send for Constraint

impl<'tcx> Sync for Constraint

impl<'tcx> Unpin for Constraint

impl<'tcx> UnwindSafe for Constraint

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
T: Copy,

pub fn allocate_on(self, arena: &'a Arena) -> &'a mut T

pub fn allocate_from_iter(
arena: &'a Arena,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘ
Notable traits for &mut [u8 ]
`impl<'_> Write for &mut [u8]impl<'_> Read for &[u8]`

impl<T> Borrow<T> for T where
T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

pub fn into(self) -> U

impl<T> ToOwned for T where
T: Clone,

type Owned = T

pub fn to_owned(&self) -> T

pub fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Layout

Enum rustc_trait_selection::infer::region_constraints::Constraint

Variants

VarSubVar(RegionVid, RegionVid)

RegSubVar(&RegionKind, RegionVid)

VarSubReg(RegionVid, &RegionKind)

RegSubReg(&RegionKind, &RegionKind)

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for Constraint

impl<'tcx> Send for Constraint

impl<'tcx> Sync for Constraint

impl<'tcx> Unpin for Constraint

impl<'tcx> UnwindSafe for Constraint

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where T: Copy,

pub fn allocate_on(self, arena: &'a Arena) -> &'a mut T

pub fn allocate_from_iter( arena: &'a Arena, iter: impl IntoIterator<Item = T>) -> &'a mut [T]ⓘNotable traits for &mut [u8]impl<'_> Write for &mut [u8]impl<'_> Read for &[u8]

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

pub fn into(self) -> U

impl<T> ToOwned for T where T: Clone,

type Owned = T

pub fn to_owned(&self) -> T

pub fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Layout

`VarSubVar(RegionVid, RegionVid)`

`RegSubVar(&RegionKind, RegionVid)`

`VarSubReg(RegionVid, &RegionKind)`

`RegSubReg(&RegionKind, &RegionKind)`

impl<T> Any for T where
T: 'static + ?Sized,

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
T: Copy,

pub fn allocate_from_iter(
arena: &'a Arena,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘ
Notable traits for &mut [u8 ]
`impl<'_> Write for &mut [u8]impl<'_> Read for &[u8]`

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,