Frama-C API - Lscope
 type t = Analyses_types.lscopemodule D : Frama_c_kernel.Datatype.S with type t = Analyses_types.lscopeval empty : tval add : Analyses_types.lscope_var -> t -> tval remove : Analyses_types.lscope_var -> t -> tval get_all : t -> Analyses_types.lscope_var listval is_used : t -> Analyses_types.pred_or_term -> bool