Trait rustc_trait_selection::infer::InferCtxtExt

pub trait InferCtxtExt<'tcx> {
    fn type_is_copy_modulo_regions(
        &self,
        param_env: ParamEnv<'tcx>,
        ty: Ty<'tcx>,
        span: Span
    ) -> bool;
    fn type_is_sized_modulo_regions(
        &self,
        param_env: ParamEnv<'tcx>,
        ty: Ty<'tcx>,
        span: Span
    ) -> bool;
    fn type_implements_trait(
        &self,
        trait_def_id: DefId,
        params: impl IntoIterator<Item = impl Into<GenericArg<'tcx>>>,
        param_env: ParamEnv<'tcx>
    ) -> EvaluationResult;
}

Required Methods

fn type_is_copy_modulo_regions(
    &self,
    param_env: ParamEnv<'tcx>,
    ty: Ty<'tcx>,
    span: Span
) -> bool

fn type_is_sized_modulo_regions(
    &self,
    param_env: ParamEnv<'tcx>,
    ty: Ty<'tcx>,
    span: Span
) -> bool

fn type_implements_trait(
    &self,
    trait_def_id: DefId,
    params: impl IntoIterator<Item = impl Into<GenericArg<'tcx>>>,
    param_env: ParamEnv<'tcx>
) -> EvaluationResult

Check whether a ty implements given trait(trait_def_id). The inputs are:

• the def-id of the trait
• the type parameters of the trait, including the self-type
• the parameter environment

Invokes evaluate_obligation, so in the event that evaluating Ty: Trait causes overflow, EvaluatedToRecur (or EvaluatedToUnknown) will be returned.

Implementors

impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx>