Struct rustc_traits::chalk_context::ChalkArenas[][src]

pub(crate) struct ChalkArenas<'gcx> {
    _phantom: PhantomData<&'gcx ()>,
}
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Fields

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Trait Implementations

impl<'gcx> Copy for ChalkArenas<'gcx>
[src]

impl<'gcx> Clone for ChalkArenas<'gcx>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl<'gcx> Debug for ChalkArenas<'gcx>
[src]

Formats the value using the given formatter. Read more

impl<'tcx> Context for ChalkArenas<'tcx>
[src]

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A canonicalized GoalInEnvironment -- that is, one where all free inference variables have been bound into the canonical binder. See [the rustc-guide] for more information. Read more

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A u-canonicalized GoalInEnvironment -- this is one where the free universes are renumbered to consecutive integers starting from U1 (but preserving their relative order). Read more

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Part of an answer: represents a canonicalized substitution, combined with region constraints. See [the rustc-guide] for more information. Read more

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A map between universes. These are produced when u-canonicalizing something; they map canonical results back to the universes from the original. Read more

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A final solution that is passed back to the user. This is completely opaque to the SLG solver; it is produced by make_solution. Read more

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Extracted from a canonicalized substitution or canonicalized ex clause, this is the type of substitution that is fully normalized with respect to inference variables. Read more

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Represents a goal along with an environment.

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Represents a region constraint that will be propagated back (but not verified). Read more

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Represents a substitution from the "canonical variables" found in a canonical goal to specific values. Read more

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Represents a set of hypotheses that are assumed to be true.

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Goals correspond to things we can prove.

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A goal that can be targeted by a program clause. The SLG solver treats these opaquely; in contrast, it understands "meta" goals like G1 && G2 and so forth natively. Read more

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A "higher-order" goal, quantified over some types and/or lifetimes. When you have a quantification, like forall<T> { G } or exists<T> { G }, this represents the <T> { G } part. Read more

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A term that can be quantified over and unified -- in current Chalk, either a type or lifetime. Read more

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A rule like DomainGoal :- Goal. Read more

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A vector of program clauses.

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The successful result from unification: contains new subgoals and things that can be attached to an ex-clause. Read more

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Upcast this domain goal into a more general goal.

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Create a "cannot prove" goal (see HhGoal::CannotProve).

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Given an environment and a goal, glue them together to create a GoalInEnvironment. Read more

impl<'gcx, 'cx> AggregateOps<ChalkArenas<'gcx>> for ChalkContext<'cx, 'gcx>
[src]

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impl<'gcx, 'cx> ContextOps<ChalkArenas<'gcx>> for ChalkContext<'cx, 'gcx>
[src]

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True if this is a coinductive goal -- e.g., proving an auto trait.

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Create an inference table for processing a new goal and instantiate that goal in that context, returning "all the pieces".

More specifically: given a u-canonical goal arg, creates a new inference table T and populates it with the universes found in arg. Then, creates a substitution S that maps each bound variable in arg to a fresh inference variable from T. Returns:

  • the table T
  • the substitution S
  • the environment and goal found by substitution S into arg

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True if this solution has no region constraints.

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Extracts the inner normalized substitution from a canonical ex-clause.

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Extracts the inner normalized substitution from a canonical constraint subst.

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🔬 This is a nightly-only experimental API. (rustc_private)

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Convert a goal G from the canonical universes into our local universes. This will yield a goal G' that is the same but for the universes of universally quantified names.

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Convert a substitution from the canonical universes into our local universes. This will yield a substitution S' that is the same but for the universes of universally quantified names. Read more

impl<'gcx, 'tcx, 'cx> InferenceTable<ChalkArenas<'gcx>, ChalkArenas<'tcx>> for ChalkInferenceContext<'cx, 'gcx, 'tcx>
[src]

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Convert the context's goal type into the HhGoal type that the SLG solver understands. The expectation is that the context's goal type has the same set of variants, but with different names and a different setup. If you inspect HhGoal, you will see that this is a "shallow" or "lazy" conversion -- that is, we convert the outermost goal into an HhGoal, but the goals contained within are left as context goals. Read more

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impl<'gcx, 'tcx, 'cx> ResolventOps<ChalkArenas<'gcx>, ChalkArenas<'tcx>> for ChalkInferenceContext<'cx, 'gcx, 'tcx>
[src]

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Combines the goal (instantiated within infer) with the given program clause to yield the start of a new strand (a canonical ex-clause). Read more

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impl<'gcx, 'tcx, 'cx> TruncateOps<ChalkArenas<'gcx>, ChalkArenas<'tcx>> for ChalkInferenceContext<'cx, 'gcx, 'tcx>
[src]

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If subgoal is too large, return a truncated variant (else return None). Read more

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If subst is too large, return a truncated variant (else return None). Read more

impl<'gcx, 'tcx, 'cx> UnificationOps<ChalkArenas<'gcx>, ChalkArenas<'tcx>> for ChalkInferenceContext<'cx, 'gcx, 'tcx>
[src]

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Returns the set of program clauses that might apply to goal. (This set can be over-approximated, naturally.) Read more

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 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?

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 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?

🔬 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?

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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Add the residual subgoals as new subgoals of the ex-clause. Also add region constraints. Read more

impl<'gcx, 'a> ExClauseLift<'gcx> for ChalkArenas<'a>
[src]

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impl<'tcx> ExClauseFold<'tcx> for ChalkArenas<'tcx>
[src]

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Auto Trait Implementations

impl<'gcx> Send for ChalkArenas<'gcx>

impl<'gcx> Sync for ChalkArenas<'gcx>