Enum rustc_infer::infer::region_constraints::Constraint

source · [−]

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

Expand description

Represents a constraint that influences the inference process.

Variants

`VarSubVar(RegionVid, RegionVid)`

A region variable is a subregion of another.

`RegSubVar(Region<'tcx>, RegionVid)`

A concrete region is a subregion of region variable.

`VarSubReg(RegionVid, Region<'tcx>)`

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(Region<'tcx>, Region<'tcx>)`

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

Implementations

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Trait Implementations

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impl<'tcx> Clone for Constraint<'tcx>

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fn clone(&self) -> Constraint<'tcx>

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl<'tcx> Debug for Constraint<'tcx>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl<'tcx> Ord for Constraint<'tcx>

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fn cmp(&self, other: &Constraint<'tcx>) -> Ordering

This method returns an Ordering between self and other. Read more

1.21.0 · source

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values. Read more

1.21.0 · source

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values. Read more

1.50.0 · source

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval. Read more

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impl<'tcx> PartialEq<Constraint<'tcx>> for Constraint<'tcx>

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fn eq(&self, other: &Constraint<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

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fn ne(&self, other: &Constraint<'tcx>) -> bool

This method tests for !=.

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impl<'tcx> PartialOrd<Constraint<'tcx>> for Constraint<'tcx>

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fn partial_cmp(&self, other: &Constraint<'tcx>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more

1.0.0 · source

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · source

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · source

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · source

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

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impl<'tcx> StructuralPartialEq for Constraint<'tcx>

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

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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

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

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

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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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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fn to_owned(&self) -> T

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

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

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.

const: unstable · source

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.

const: unstable · source

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

Performs the conversion.

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impl<'a, T> Captures<'a> for T where
T: ?Sized,

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_infer::infer::region_constraints::Constraint

Variants

VarSubVar(RegionVid, RegionVid)

RegSubVar(Region<'tcx>, RegionVid)

VarSubReg(RegionVid, Region<'tcx>)

RegSubReg(Region<'tcx>, Region<'tcx>)

Implementations

impl Constraint<'_>

pub fn involves_placeholders(&self) -> bool

Trait Implementations

impl<'tcx> Clone for Constraint<'tcx>

fn clone(&self) -> Constraint<'tcx>

fn clone_from(&mut self, source: &Self)

impl<'tcx> Debug for Constraint<'tcx>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

impl<'tcx> Ord for Constraint<'tcx>

fn cmp(&self, other: &Constraint<'tcx>) -> Ordering

fn max(self, other: Self) -> Self

fn min(self, other: Self) -> Self

fn clamp(self, min: Self, max: Self) -> Self

impl<'tcx> PartialEq<Constraint<'tcx>> for Constraint<'tcx>

fn eq(&self, other: &Constraint<'tcx>) -> bool

fn ne(&self, other: &Constraint<'tcx>) -> bool

impl<'tcx> PartialOrd<Constraint<'tcx>> for Constraint<'tcx>

fn partial_cmp(&self, other: &Constraint<'tcx>) -> Option<Ordering>

fn lt(&self, other: &Rhs) -> bool

fn le(&self, other: &Rhs) -> bool

fn gt(&self, other: &Rhs) -> bool

fn ge(&self, other: &Rhs) -> bool

impl<'tcx> Copy for Constraint<'tcx>

impl<'tcx> Eq for Constraint<'tcx>

impl<'tcx> StructuralEq for Constraint<'tcx>

impl<'tcx> StructuralPartialEq for Constraint<'tcx>

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,

fn type_id(&self) -> TypeId

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

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

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,

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

impl<'a, T> Captures<'a> for T where T: ?Sized,

Layout

`VarSubVar(RegionVid, RegionVid)`

`RegSubVar(Region<'tcx>, RegionVid)`

`VarSubReg(RegionVid, Region<'tcx>)`

`RegSubReg(Region<'tcx>, Region<'tcx>)`

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

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

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>,

impl<'a, T> Captures<'a> for T where
T: ?Sized,