pub struct Goal<I: Interner> {
    pub(crate) interned: I::InternedGoal,
}
Expand description

A general goal; this is the full range of questions you can pose to Chalk.

Fields

interned: I::InternedGoal

Implementations

Create a new goal using GoalData.

Gets the interned goal.

Gets the interned goal data.

Create a goal using a forall or exists quantifier.

Takes a goal G and turns it into not { G }.

Takes a goal G and turns it into compatible { G }.

Create an implication goal that holds if the predicates are true.

True if this goal is “trivially true” – i.e., no work is required to prove it.

Creates a single goal that only holds if a list of goals holds.

Trait Implementations

Cast a value to type T.

Cast a value to type T.

Cast a value to type T.

Cast a value to type T.

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

The interner associated with the type.

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

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

This method tests for !=.

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

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

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

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

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

Folding a goal invokes the fold_goal callback (which will, by default, invoke super-fold).

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. Read more

Superfold folds recursively.

Recursively folds the value.

Recursively visits the type contents.

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. Read more

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

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Cast a value to type U using CastTo.

Cast a value to type T.

Checks whether self and other could possibly match.

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Shifts this term in one level of binders.

Shifts a term valid at outer_binder so that it is valid at the innermost binder. See DebruijnIndex::shifted_in_from for a detailed explanation. Read more

Shifts a term valid at the innermost binder so that it is valid at outer_binder. See DebruijnIndex::shifted_out_to for a detailed explanation. Read more

Shifts this term out one level of binders.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Check whether there are free (non-bound) variables.