diff options
| -rw-r--r-- | lib/asn1/src/asn1ct_imm.erl | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl index 91820e08de..5bf69e9294 100644 --- a/lib/asn1/src/asn1ct_imm.erl +++ b/lib/asn1/src/asn1ct_imm.erl @@ -1922,16 +1922,7 @@ enc_opt(nil, St) -> enc_opt({seq,H0,T0}, St0) -> {H,St1} = enc_opt(H0, St0), {T,St} = enc_opt(T0, St1), - case {H,T} of - {none,_} -> - {T,St}; - {{list,Imm,Data}, - {seq,{call,per,complete,[Data],_},_}} -> - %% Get rid of any explicit 'align' added by per_enc_open_type/2. - {{seq,{list,remove_trailing_align(Imm),Data},T},St}; - {_,_} -> - {{seq,H,T},St} - end; + {enc_opt_seq(H, T),St}; enc_opt({set,_,_}=Imm, St) -> {Imm,St#ost{t=undefined}}; enc_opt({sub,Src0,Int,Dst}, St0) -> @@ -1965,6 +1956,28 @@ remove_trailing_align({seq,H,T}) -> {seq,H,remove_trailing_align(T)}; remove_trailing_align(Imm) -> Imm. +enc_opt_seq(none, T) -> + T; +enc_opt_seq({list,Imm,Data}, {seq,{call,per,complete,[Data],_},_}=T) -> + %% Get rid of any explicit 'align' added by per_enc_open_type/2. + {seq,{list,remove_trailing_align(Imm),Data},T}; +enc_opt_seq({call,_,_,_,{var,_}=Dst}=H, T) -> + case is_var_unused(Dst, T) of + false -> {seq,H,T}; + true -> T + end; +enc_opt_seq(H, T) -> + {seq,H,T}. + +is_var_unused(_, align) -> + true; +is_var_unused(V, {call,_,_,Args}) -> + not lists:member(V, Args); +is_var_unused(V, {cons,H,T}) -> + is_var_unused(V, H) andalso is_var_unused(V, T); +is_var_unused(_, _) -> + false. + bit_size_propagate(Bin, Type, St) -> case t_range(Type) of any -> |