Function rustc_mir::transform::qualify_min_const_fn::is_min_const_fn

pub fn is_min_const_fn<'tcx, 'a>(
    tcx: TyCtxt<'tcx>, 
    def_id: DefId, 
    body: &'a Body<'tcx>
) -> Result<(), (Span, Cow<'static, str>)>