-extendCaseBndrLvlEnv (lvl_env, subst_env, id_env) scrut case_bndr lvl
- = case scrut of
- Var v -> (new_lvl_env, extendSubstEnv subst_env case_bndr (DoneEx (Var v)),
- extendVarEnv id_env case_bndr ([], scrut))
- other -> (new_lvl_env, subst_env, id_env)
+-- (see point 4 of the module overview comment)
+extendCaseBndrLvlEnv (float_lams, lvl_env, subst, id_env) (Var scrut_var) case_bndr lvl
+ = (float_lams,
+ extendVarEnv lvl_env case_bndr lvl,
+ extendSubst subst case_bndr (DoneEx (Var scrut_var)),
+ extendVarEnv id_env case_bndr ([scrut_var], Var scrut_var))
+
+extendCaseBndrLvlEnv env scrut case_bndr lvl
+ = extendLvlEnv env [(case_bndr,lvl)]
+
+extendPolyLvlEnv dest_lvl (float_lams, lvl_env, subst, id_env) abs_vars bndr_pairs
+ = (float_lams,
+ foldl add_lvl lvl_env bndr_pairs,
+ foldl add_subst subst bndr_pairs,
+ foldl add_id id_env bndr_pairs)
+ where
+ add_lvl env (v,v') = extendVarEnv env v' dest_lvl
+ add_subst env (v,v') = extendSubst env v (DoneEx (mkVarApps (Var v') abs_vars))
+ add_id env (v,v') = extendVarEnv env v ((v':abs_vars), mkVarApps (Var v') abs_vars)
+
+extendCloneLvlEnv lvl (float_lams, lvl_env, _, id_env) new_subst bndr_pairs
+ = (float_lams,
+ foldl add_lvl lvl_env bndr_pairs,
+ new_subst,
+ foldl add_id id_env bndr_pairs)