cfg.rs

        impl #ident{
           #[cfg(feature = "std")] // This is somehow lost :(
           pub fn from_bitflag(bitflag: ::enumflags::BitFlags<#ident>) -> Vec<#ident> {
               #flag_values_ref1.iter().filter_map(|val|{
                   let val = *val as #ty & bitflag.bits();
                   match val {
                       #(#flag_value_names => Some(#names_ref :: #variants_ref),)*
                       _ => None
                   }
               }).collect()
           }
...