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
sourceimpl Constraint<'_>
impl Constraint<'_>
pub fn involves_placeholders(&self) -> bool
Trait Implementations
sourceimpl<'tcx> Clone for Constraint<'tcx>
impl<'tcx> Clone for Constraint<'tcx>
sourcefn clone(&self) -> Constraint<'tcx>
fn clone(&self) -> Constraint<'tcx>
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl<'tcx> Debug for Constraint<'tcx>
impl<'tcx> Debug for Constraint<'tcx>
sourceimpl<'tcx> Ord for Constraint<'tcx>
impl<'tcx> Ord for Constraint<'tcx>
sourceimpl<'tcx> PartialEq<Constraint<'tcx>> for Constraint<'tcx>
impl<'tcx> PartialEq<Constraint<'tcx>> for Constraint<'tcx>
sourcefn eq(&self, other: &Constraint<'tcx>) -> bool
fn eq(&self, other: &Constraint<'tcx>) -> bool
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
sourcefn ne(&self, other: &Constraint<'tcx>) -> bool
fn ne(&self, other: &Constraint<'tcx>) -> bool
This method tests for !=
.
sourceimpl<'tcx> PartialOrd<Constraint<'tcx>> for Constraint<'tcx>
impl<'tcx> PartialOrd<Constraint<'tcx>> for Constraint<'tcx>
sourcefn partial_cmp(&self, other: &Constraint<'tcx>) -> Option<Ordering>
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 · sourcefn lt(&self, other: &Rhs) -> bool
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 · sourcefn le(&self, other: &Rhs) -> bool
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
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
sourceimpl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T where
T: Copy,
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]
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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 bytesRegSubVar
: 12 bytesVarSubReg
: 12 bytesRegSubReg
: 20 bytes