Function rustc_traits::type_op::type_op_ascribe_user_type_with_span

pub fn type_op_ascribe_user_type_with_span<'a, 'tcx: 'a>(
    infcx: &'a InferCtxt<'a, 'tcx>,
    fulfill_cx: &'a mut dyn TraitEngine<'tcx>,
    key: ParamEnvAnd<'tcx, AscribeUserType<'tcx>>,
    span: Option<Span>
) -> Result<(), NoSolution>

The core of the type_op_ascribe_user_type query: for diagnostics purposes in NLL HRTB errors, this query can be re-run to better track the span of the obligation cause, and improve the error message. Do not call directly unless you’re in that very specific context.