__isl_give isl_pw_multi_aff *isl_pw_multi_aff_substitute(
__isl_take isl_pw_multi_aff *pma, enum isl_dim_type type, unsigned pos,
__isl_keep isl_pw_aff *subs);
__isl_give isl_pw_multi_aff *isl_pw_multi_aff_substitute(
__isl_take isl_pw_multi_aff *pma, enum isl_dim_type type, unsigned pos,
__isl_keep isl_pw_aff *subs);