Struct rustc::traits::ProgramClause [−][src]
pub struct ProgramClause<'tcx> { pub goal: DomainGoal<'tcx>, pub hypotheses: Goals<'tcx>, }
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A "program clause" has the form D :- G1, ..., Gn
. It is saying
that the domain goal D
is true if G1...Gn
are provable. This
is equivalent to the implication G1..Gn => D
; we usually write
it with the reverse implication operator :-
to emphasize the way
that programs are actually solved (via backchaining, which starts
with the goal to solve and proceeds from there).
Fields
goal: DomainGoal<'tcx>
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This goal will be considered true...
hypotheses: Goals<'tcx>
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...if we can prove these hypotheses (there may be no hypotheses at all):
Trait Implementations
impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for ProgramClause<'tcx>
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impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for ProgramClause<'tcx>
fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
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fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
🔬 This is a nightly-only experimental API. (rustc_private
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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?
impl<'tcx> Display for ProgramClause<'tcx>
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impl<'tcx> Display for ProgramClause<'tcx>
fn fmt(&self, fmt: &mut Formatter) -> Result
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fn fmt(&self, fmt: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl<'tcx> TypeFoldable<'tcx> for ProgramClause<'tcx>
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impl<'tcx> TypeFoldable<'tcx> for ProgramClause<'tcx>
fn super_fold_with<'gcx: 'tcx, V: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut V
) -> Self
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fn super_fold_with<'gcx: 'tcx, V: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut V
) -> Self
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instead?
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_regions_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
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fn has_regions_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
🔬 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
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True if self
has any late-bound regions that are either bound by binder
or bound by some binder outside of binder
. If binder
is ty::INNERMOST
, this indicates whether there are any late-bound regions that appear free. Read more
fn has_regions_bound_above(&self, binder: DebruijnIndex) -> bool
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fn has_regions_bound_above(&self, binder: DebruijnIndex) -> bool
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)
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?
True if this self
has any regions that escape binder
(and hence are not bound by it). Read more
fn has_escaping_regions(&self) -> bool
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fn has_escaping_regions(&self) -> bool
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_type_flags(&self, flags: TypeFlags) -> bool
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fn has_type_flags(&self, flags: TypeFlags) -> bool
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)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_projections(&self) -> bool
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fn has_projections(&self) -> bool
🔬 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
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fn references_error(&self) -> bool
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fn references_error(&self) -> bool
🔬 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
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fn has_param_types(&self) -> bool
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fn has_param_types(&self) -> bool
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)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_self_ty(&self) -> bool
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fn has_self_ty(&self) -> bool
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_infer_types(&self) -> bool
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fn has_infer_types(&self) -> bool
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fn needs_infer(&self) -> bool
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fn needs_infer(&self) -> bool
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fn has_skol(&self) -> bool
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fn has_skol(&self) -> bool
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn needs_subst(&self) -> bool
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fn needs_subst(&self) -> bool
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)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_re_skol(&self) -> bool
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fn has_re_skol(&self) -> bool
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this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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fn has_closure_types(&self) -> bool
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fn has_closure_types(&self) -> bool
🔬 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
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fn has_free_regions(&self) -> bool
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fn has_free_regions(&self) -> bool
🔬 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?
"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more
fn has_erasable_regions(&self) -> bool
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fn has_erasable_regions(&self) -> bool
🔬 This is a nightly-only experimental API. (rustc_private
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True if there any any un-erased free regions.
fn is_global(&self) -> bool
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fn is_global(&self) -> bool
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)
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Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Read more
fn has_late_bound_regions(&self) -> bool
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fn has_late_bound_regions(&self) -> bool
🔬 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?
True if there are any late-bound regions
impl<'tcx> Copy for ProgramClause<'tcx>
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impl<'tcx> Copy for ProgramClause<'tcx>
impl<'tcx> Clone for ProgramClause<'tcx>
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impl<'tcx> Clone for ProgramClause<'tcx>
fn clone(&self) -> ProgramClause<'tcx>
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fn clone(&self) -> ProgramClause<'tcx>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<'tcx> PartialEq for ProgramClause<'tcx>
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impl<'tcx> PartialEq for ProgramClause<'tcx>
fn eq(&self, other: &ProgramClause<'tcx>) -> bool
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fn eq(&self, other: &ProgramClause<'tcx>) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &ProgramClause<'tcx>) -> bool
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fn ne(&self, other: &ProgramClause<'tcx>) -> bool
This method tests for !=
.
impl<'tcx> Eq for ProgramClause<'tcx>
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impl<'tcx> Eq for ProgramClause<'tcx>
fn assert_receiver_is_total_eq(&self)
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fn assert_receiver_is_total_eq(&self)
impl<'tcx> Hash for ProgramClause<'tcx>
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impl<'tcx> Hash for ProgramClause<'tcx>
fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash<__H: Hasher>(&self, state: &mut __H)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<'tcx> Debug for ProgramClause<'tcx>
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impl<'tcx> Debug for ProgramClause<'tcx>
Auto Trait Implementations
impl<'tcx> !Send for ProgramClause<'tcx>
impl<'tcx> !Send for ProgramClause<'tcx>
impl<'tcx> !Sync for ProgramClause<'tcx>
impl<'tcx> !Sync for ProgramClause<'tcx>