python: fix return of is_rabin_like() and is_streett_like()

* python/spot/impl.i: Fix instantiation of vector_rs_pairs.
* tests/python/setacc.py: Add test cases.
* NEWS: Mention the bugs.

NEWS

@@ -78,7 +78,9 @@ New in spot 2.6.3.dev (not yet released)
   Bugs fixed:
 
   - The pair of acc_cond::mark_t returned by
-    acc_code::used_inf_fin_sets() was not usable in Python.
+    acc_code::used_inf_fin_sets(), and the pair (bool,
+    vector_rs_pairs) by acc_cond::is_rabin_like() and
+    acc_cond::is_streett_like() were not usable in Python.
 
 New in spot 2.6.3 (2018-10-17)
 

python/spot/impl.i

@@ -475,7 +475,9 @@ namespace std {
 %feature("flatnested") spot::acc_cond::acc_code;
 %feature("flatnested") spot::acc_cond::rs_pair;
 %apply bool* OUTPUT {bool& max, bool& odd};
-%template(vector_rs_pair) std::vector<spot::acc_cond::rs_pair>;
+namespace std {
+  %template(vector_rs_pair) vector<spot::acc_cond::rs_pair>;
+}
 %apply std::vector<spot::acc_cond::rs_pair> &OUTPUT {std::vector<spot::acc_cond::rs_pair>& pairs}
 %include <spot/twa/acc.hh>
 %template(pair_bool_mark) std::pair<bool, spot::acc_cond::mark_t>;

tests/python/setacc.py

@@ -36,3 +36,22 @@ assert fin == [0]
 (inf, fin) = spot.acc_code("(Fin(0)|Inf(1))&Fin(2)&Inf(0)").used_inf_fin_sets()
 assert inf == [0,1]
 assert fin == [0,2]
+
+# is_rabin_like() returns (bool, [(inf, fin), ...])
+(b, v) = spot.acc_cond("(Fin(0)&Inf(1))|(Fin(2)&Inf(0))").is_rabin_like()
+assert b == True
+assert len(v) == 2
+assert v[0].fin == [0]
+assert v[0].inf == [1]
+assert v[1].fin == [2]
+assert v[1].inf == [0]
+(b, v) = spot.acc_cond("(Fin(0)|Inf(1))&(Fin(2)|Inf(0))").is_rabin_like()
+assert b == False
+assert len(v) == 0
+(b, v) = spot.acc_cond("(Fin(0)|Inf(1))&(Fin(2)|Inf(0))").is_streett_like()
+assert b == True
+assert len(v) == 2
+assert v[0].fin == [0]
+assert v[0].inf == [1]
+assert v[1].fin == [2]
+assert v[1].inf == [0]