Struct chalk_ir::Environment

pub struct Environment<I: Interner> {
    pub clauses: ProgramClauses<I>,
}

The set of assumptions we've made so far, and the current number of universal (forall) quantifiers we're within.

Fields

clauses: ProgramClauses<I>

The clauses in the environment.

Implementations

impl<I: Interner> Environment<I>

pub fn new(interner: &I) -> Self

Creates a new environment.

pub fn add_clauses<II>(&self, interner: &I, clauses: II) -> Self where
    II: IntoIterator<Item = ProgramClause<I>>, 

Adds (an iterator of) clauses to the environment.

pub fn has_compatible_clause(&self, interner: &I) -> bool

True if any of the clauses in the environment have a consequence of Compatible. Panics if the conditions or constraints of that clause are not empty.

Trait Implementations

impl<I: Clone + Interner> Clone for Environment<I>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Interner> Copy for Environment<I> where
    I::InternedProgramClauses: Copy, 

impl<I: Interner> Debug for Environment<I>

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

Formats the value using the given formatter.

impl<I: Eq + Interner> Eq for Environment<I>

impl<I: Interner, _TI> Fold<I, _TI> for Environment<I> where
    _TI: TargetInterner<I>, 

type Result = Environment<_TI>

The type of value that will be produced once folding is done. Typically this is Self, unless Self contains borrowed values, in which case owned values are produced (for example, one can fold over a &T value where T: Fold, in which case you get back a T, not a &T).

fn fold_with<'i>(
    &self,
    folder: &mut dyn Folder<'i, I, _TI>,
    outer_binder: DebruijnIndex
) -> Fallible<Self::Result> where
    I: 'i,
    _TI: 'i, 

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.

impl<I: Interner> HasInterner for Environment<I>

type Interner = I

The interner associated with the type.

impl<I: Hash + Interner> Hash for Environment<I>

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<I: PartialEq + Interner> PartialEq<Environment<I>> for Environment<I>

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

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

fn ne(&self, other: &Environment<I>) -> bool

This method tests for !=.

impl<I: Interner> StructuralEq for Environment<I>

impl<I: Interner> StructuralPartialEq for Environment<I>

impl<I: Interner> Visit<I> for Environment<I>

fn visit_with<'i, R: VisitResult>(
    &self,
    visitor: &mut dyn Visitor<'i, I, Result = R>,
    outer_binder: DebruijnIndex
) -> R where
    I: 'i, 

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: Interner> Zip<I> for Environment<I>

fn zip_with<'i, Z: Zipper<'i, I>>(
    zipper: &mut Z,
    a: &Self,
    b: &Self
) -> Fallible<()> where
    I: 'i, 

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