Enum rustc_trait_selection::infer::region_constraints::Constraint[−][src]

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, ()> 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]

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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<U> 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)

recently added

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

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impl<T, U> TryFrom<U> 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<U>>::Error>

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

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impl<T> WithConstness for T

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fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>

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fn with_const(self) -> ConstnessAnd<Self>

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fn without_const(self) -> ConstnessAnd<Self>

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. 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