Type Alias WhereClause

pub type WhereClause = WhereClause<Interner>;

Aliased Type

enum WhereClause {
    Implemented(TraitRef<Interner>),
    AliasEq(AliasEq<Interner>),
    LifetimeOutlives(LifetimeOutlives<Interner>),
    TypeOutlives(TypeOutlives<Interner>),
}

Variants

Implemented(TraitRef<Interner>)

Type implements a trait.

AliasEq(AliasEq<Interner>)

Type is equal to an alias.

LifetimeOutlives(LifetimeOutlives<Interner>)

One lifetime outlives another.

TypeOutlives(TypeOutlives<Interner>)

Type outlives a lifetime.

Implementations

impl<I> WhereClause<I>

where I: Interner,

pub fn into_well_formed_goal(self, interner: I) -> DomainGoal<I>

Turn a where clause into the WF version of it i.e.:

• Implemented(T: Trait) maps to WellFormed(T: Trait)
• ProjectionEq(<T as Trait>::Item = Foo) maps to WellFormed(<T as Trait>::Item = Foo)
• any other clause maps to itself

pub fn into_from_env_goal(self, interner: I) -> DomainGoal<I>

Same as into_well_formed_goal but with the FromEnv predicate instead of WellFormed.

pub fn trait_id(&self) -> Option<TraitId<I>>

If where clause is a TraitRef, returns its trait id.

Trait Implementations

impl HirDisplay for WhereClause

fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError>

fn into_displayable<'a>( &'a self, db: &'a dyn HirDatabase, max_size: Option<usize>, limited_size: Option<usize>, omit_verbose_types: bool, display_target: DisplayTarget, display_kind: DisplayKind, closure_style: ClosureStyle, show_container_bounds: bool, ) -> HirDisplayWrapper<'a, Self>

where Self: Sized,

Returns a Displayable type that is human-readable.

fn display<'a>( &'a self, db: &'a dyn HirDatabase, display_target: DisplayTarget, ) -> HirDisplayWrapper<'a, Self>

where Self: Sized,

Returns a Displayable type that is human-readable. Use this for showing types to the user (e.g. diagnostics)

fn display_truncated<'a>( &'a self, db: &'a dyn HirDatabase, max_size: Option<usize>, display_target: DisplayTarget, ) -> HirDisplayWrapper<'a, Self>

where Self: Sized,

Returns a Displayable type that is human-readable and tries to be succinct. Use this for showing types to the user where space is constrained (e.g. doc popups)

fn display_limited<'a>( &'a self, db: &'a dyn HirDatabase, limited_size: Option<usize>, display_target: DisplayTarget, ) -> HirDisplayWrapper<'a, Self>

where Self: Sized,

Returns a Displayable type that is human-readable and tries to limit the number of items inside. Use this for showing definitions which may contain too many items, like trait, struct, enum

fn display_source_code<'a>( &'a self, db: &'a dyn HirDatabase, module_id: ModuleId, allow_opaque: bool, ) -> Result<String, DisplaySourceCodeError>

Returns a String representation of self that can be inserted into the given module. Use this when generating code (e.g. assists)

fn display_test<'a>( &'a self, db: &'a dyn HirDatabase, display_target: DisplayTarget, ) -> HirDisplayWrapper<'a, Self>

where Self: Sized,

Returns a String representation of self for test purposes

fn display_with_container_bounds<'a>( &'a self, db: &'a dyn HirDatabase, show_container_bounds: bool, display_target: DisplayTarget, ) -> HirDisplayWrapper<'a, Self>

where Self: Sized,

Returns a String representation of self that shows the constraint from the container for functions

impl<I> CastTo<WhereClause<I>> for WhereClause<I>

where I: Interner,

fn cast_to( self, _interner: <WhereClause<I> as HasInterner>::Interner, ) -> WhereClause<I>

Cast a value to type T.

impl<I> Clone for WhereClause<I>

where I: Clone + Interner,

fn clone(&self) -> WhereClause<I>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I> Debug for WhereClause<I>

where I: Interner,

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

Formats the value using the given formatter.

impl<I> HasInterner for WhereClause<I>

where I: Interner,

type Interner = I

The interner associated with the type.

impl<I> Hash for WhereClause<I>

where I: Hash + Interner,

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

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<I> PartialEq for WhereClause<I>

where I: PartialEq + Interner,

fn eq(&self, other: &WhereClause<I>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<I> TypeFoldable<I> for WhereClause<I>

where I: Interner,

fn try_fold_with<E>( self, folder: &mut dyn FallibleTypeFolder<I, Error = E>, outer_binder: DebruijnIndex, ) -> Result<WhereClause<I>, E>

Apply the given folder folder to self; binders is the number of binders that are in scope when beginning the folder. Typically binders starts as 0, but is adjusted when we encounter Binders<T> in the IR or other similar constructs.

fn fold_with( self, folder: &mut dyn TypeFolder<I, Error = Infallible>, outer_binder: DebruijnIndex, ) -> Self

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<I> TypeSuperVisitable<I> for WhereClause<I>

where I: Interner,

fn super_visit_with<B>( &self, visitor: &mut dyn TypeVisitor<I, BreakTy = B>, outer_binder: DebruijnIndex, ) -> ControlFlow<B>

Recursively visits the type contents.

impl<I> TypeVisitable<I> for WhereClause<I>

where I: Interner,

fn visit_with<B>( &self, visitor: &mut dyn TypeVisitor<I, BreakTy = B>, outer_binder: DebruijnIndex, ) -> ControlFlow<B>

Apply the given visitor visitor to self; binders is the number of binders that are in scope when beginning the visitor. Typically binders starts as 0, but is adjusted when we encounter Binders<T> in the IR or other similar constructs.

impl<I> Zip<I> for WhereClause<I>

where I: Interner,

fn zip_with<Z>( zipper: &mut Z, variance: Variance, a: &WhereClause<I>, b: &WhereClause<I>, ) -> Result<(), NoSolution>

where Z: Zipper<I>,

Uses the zipper to walk through two values, ensuring that they match.

impl<I> Copy for WhereClause<I>

where I: Interner, <I as Interner>::InternedSubstitution: Copy, <I as Interner>::InternedLifetime: Copy, <I as Interner>::InternedType: Copy,

impl<I> Eq for WhereClause<I>

where I: Eq + Interner,

impl<I> StructuralPartialEq for WhereClause<I>

where I: Interner,