Trait FnAbiOfHelpers 

pub trait FnAbiOfHelpers<'tcx>: LayoutOfHelpers<'tcx> {
    type FnAbiOfResult: MaybeResult<&'tcx FnAbi<'tcx, Ty<'tcx>>> = &'tcx FnAbi<'tcx, Ty<'tcx>>;

    // Required method
    fn handle_fn_abi_err(
        &self,
        err: FnAbiError<'tcx>,
        span: Span,
        fn_abi_request: FnAbiRequest<'tcx>,
    ) -> <Self::FnAbiOfResult as MaybeResult<&'tcx FnAbi<'tcx, Ty<'tcx>>>>::Error;
}

Trait for contexts that want to be able to compute FnAbis. This automatically gives access to FnAbiOf, through a blanket impl.

Provided Associated Types

type FnAbiOfResult: MaybeResult<&'tcx FnAbi<'tcx, Ty<'tcx>>> = &'tcx FnAbi<'tcx, Ty<'tcx>>

The &FnAbi-wrapping type (or &FnAbi itself), which will be returned from fn_abi_of_* (see also handle_fn_abi_err).

Required Methods

fn handle_fn_abi_err( &self, err: FnAbiError<'tcx>, span: Span, fn_abi_request: FnAbiRequest<'tcx>, ) -> <Self::FnAbiOfResult as MaybeResult<&'tcx FnAbi<'tcx, Ty<'tcx>>>>::Error

Helper used for fn_abi_of_*, to adapt tcx.fn_abi_of_*(...) into a Self::FnAbiOfResult (which does not need to be a Result<...>).

Most impls, which propagate FnAbiErrors, should simply return err, but this hook allows e.g. codegen to return only &FnAbi from its cx.fn_abi_of_*(...), without any Result<...> around it to deal with (and any FnAbiErrors are turned into fatal errors or ICEs).

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors