Enum rustc_trait_selection::infer::region_constraints::Constraint

source · [−]

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

Expand description

Represents a constraint that influences the inference process.

Variants

`VarSubVar(RegionVid, RegionVid)`

A region variable is a subregion of another.

`RegSubVar(&'tcx RegionKind, RegionVid)`

A concrete region is a subregion of region variable.

`VarSubReg(RegionVid, &'tcx 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(&'tcx RegionKind, &'tcx 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<'tcx>

impl<'tcx> Send for Constraint<'tcx>

impl<'tcx> Sync for Constraint<'tcx>

impl<'tcx> Unpin for Constraint<'tcx>

impl<'tcx> UnwindSafe for Constraint<'tcx>

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, IsCopy> for T where
T: Copy,

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

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

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

const: unstable · source

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,

const: unstable · source

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

const: unstable · source

pub fn from(t: T) -> T

Performs the conversion.

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

const: unstable · source

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

source

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

source

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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(&'tcx RegionKind, RegionVid)`

`VarSubReg(RegionVid, &'tcx RegionKind)`

`RegSubReg(&'tcx RegionKind, &'tcx RegionKind)`

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for Constraint<'tcx>

impl<'tcx> Send for Constraint<'tcx>

impl<'tcx> Sync for Constraint<'tcx>

impl<'tcx> Unpin for Constraint<'tcx>

impl<'tcx> UnwindSafe for Constraint<'tcx>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

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

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

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

VarSubReg(RegionVid, &'tcx RegionKind)

RegSubReg(&'tcx RegionKind, &'tcx RegionKind)

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for Constraint<'tcx>

impl<'tcx> Send for Constraint<'tcx>

impl<'tcx> Sync for Constraint<'tcx>

impl<'tcx> Unpin for Constraint<'tcx>

impl<'tcx> UnwindSafe for Constraint<'tcx>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

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

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

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

`VarSubReg(RegionVid, &'tcx RegionKind)`

`RegSubReg(&'tcx RegionKind, &'tcx RegionKind)`

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

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

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