+ __isl_give isl_restriction *isl_restriction_input(
+ __isl_take isl_set *source_restr,
+ __isl_take isl_set *sink_restr);
+ __isl_give isl_restriction *isl_restriction_output(
+ __isl_take isl_set *source_restr);
+ __isl_give isl_restriction *isl_restriction_none(
+ __isl_take isl_map *source_map);
+ __isl_give isl_restriction *isl_restriction_empty(
+ __isl_take isl_map *source_map);
+ void *isl_restriction_free(
+ __isl_take isl_restriction *restr);
+ isl_ctx *isl_restriction_get_ctx(
+ __isl_keep isl_restriction *restr);
+
+C<isl_restriction_none> and C<isl_restriction_empty> are special
+cases of C<isl_restriction_input>. C<isl_restriction_none>
+is essentially equivalent to
+
+ isl_restriction_input(isl_set_universe(
+ isl_space_range(isl_map_get_space(source_map))),
+ isl_set_universe(
+ isl_space_domain(isl_map_get_space(source_map))));
+
+whereas C<isl_restriction_empty> is essentially equivalent to
+
+ isl_restriction_input(isl_set_empty(
+ isl_space_range(isl_map_get_space(source_map))),
+ isl_set_universe(
+ isl_space_domain(isl_map_get_space(source_map))));