Function rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable

pub fn is_const_evaluatable<'cx, 'tcx>(
    infcx: &InferCtxt<'cx, 'tcx>, 
    def: WithOptConstParam<DefId>, 
    substs: SubstsRef<'tcx>, 
    param_env: ParamEnv<'tcx>, 
    span: Span
) -> Result<(), ErrorHandled>

Check if a given constant can be evaluated.