vectInfoVar :: VarEnv (Var , Var ), -- (f, f_v) keyed on f
vectInfoTyCon :: NameEnv (TyCon , TyCon), -- (T, T_v) keyed on T
vectInfoDataCon :: NameEnv (DataCon, DataCon), -- (C, C_v) keyed on C
vectInfoVar :: VarEnv (Var , Var ), -- (f, f_v) keyed on f
vectInfoTyCon :: NameEnv (TyCon , TyCon), -- (T, T_v) keyed on T
vectInfoDataCon :: NameEnv (DataCon, DataCon), -- (C, C_v) keyed on C