Enum rustc::infer::region_constraints::Constraint

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

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

A constraint that influences the inference process.

Variants

VarSubVar(RegionVid, RegionVid)

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

One region variable is subregion of another

RegSubVar(Region<'tcx>, RegionVid)

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Concrete region is subregion of region variable

VarSubReg(RegionVid, Region<'tcx>)

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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

RegSubReg(Region<'tcx>, Region<'tcx>)

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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

Trait Implementations

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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

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

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

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

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

This method tests for !=.

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

fn assert_receiver_is_total_eq(&self)

impl<'tcx> Hash for Constraint<'tcx>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].

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

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

Formats the value using the given formatter.

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

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

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

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

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

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

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

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

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

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

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

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

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.