Struct rustc::traits::Obligation [−] [src]

pub struct Obligation<'tcx, T> {
    pub cause: ObligationCause<'tcx>,
    pub recursion_depth: usize,
    pub predicate: T,
}
Unstable (rustc_private)

An Obligation represents some trait reference (e.g. int:Eq) for which the vtable must be found. The process of finding a vtable is called "resolving" the Obligation. This process consists of either identifying an impl (e.g., impl Eq for int) that provides the required vtable, or else finding a bound that is in scope. The eventual result is usually a Selection (defined below).

Fields

cause: ObligationCause<'tcx>
Unstable (rustc_private)
recursion_depth: usize
Unstable (rustc_private)
predicate: T
Unstable (rustc_private)

Methods

impl<'tcx, O> Obligation<'tcx, O>
[src]

fn new(cause: ObligationCause<'tcx>, trait_ref: O) -> Obligation<'tcx, O>

fn misc(span: Span, body_id: NodeId, trait_ref: O) -> Obligation<'tcx, O>

fn with<P>(&self, value: P) -> Obligation<'tcx, P>

Trait Implementations

impl<'tcx, O: Debug> Debug for Obligation<'tcx, O>
[src]

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'tcx, O: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Obligation<'tcx, O>
[src]

fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self

fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn has_regions_escaping_depth(&self, depth: u32) -> bool

fn has_escaping_regions(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projection_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types(&self) -> bool

fn has_self_ty(&self) -> bool

fn has_infer_types(&self) -> bool

fn needs_infer(&self) -> bool

fn needs_subst(&self) -> bool

fn has_closure_types(&self) -> bool

fn has_erasable_regions(&self) -> bool

fn is_global(&self) -> bool

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. Errs on the side of returning false. Read more

Derived Implementations

impl<'tcx, T: Eq> Eq for Obligation<'tcx, T>
[src]

impl<'tcx, T: PartialEq> PartialEq for Obligation<'tcx, T>
[src]

fn eq(&self, __arg_0: &Obligation<'tcx, T>) -> bool

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

fn ne(&self, __arg_0: &Obligation<'tcx, T>) -> bool

This method tests for !=.

impl<'tcx, T: Clone> Clone for Obligation<'tcx, T>
[src]

fn clone(&self) -> Obligation<'tcx, T>

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)
1.0.0

Performs copy-assignment from source. Read more