Merge pull request #764 from corona10/issue689

list recursive printing

src/runtime/list.cpp

@@ -67,6 +67,17 @@ extern "C" Box* listRepr(BoxedList* self) {
 
     std::string O("");
     llvm::raw_string_ostream os(O);
+
+    // Implementing Recursive Print of list in same way from  Cpython
+    int recursive = Py_ReprEnter((PyObject*)self);
+    if (recursive != 0) {
+        if (recursive < 0)
+            return boxString(os.str());
+
+        os << "[...]";
+        return boxString(os.str());
+    }
+
     os << '[';
     for (int i = 0; i < self->size; i++) {
         if (i > 0)
@@ -79,6 +90,8 @@ extern "C" Box* listRepr(BoxedList* self) {
         os << s->s();
     }
     os << ']';
+
+    Py_ReprLeave((PyObject*)self);
     return boxString(os.str());
 }
 

test/tests/list.py

@@ -15,6 +15,10 @@ l = range(7, -1, -2)
 print sorted(l)
 print l
 
+l = range(5)
+l[0] = l
+print l
+
 for i in xrange(-10, 10):
     l2 = range(5)
     l2.insert(i, 99)