We can do better with the SBValue.linked_list_iter() API by supplying a default
end of list test function as __eol_test__.
The simple example can be reduced to:
for t in task_head.linked_list_iter('next'):
print t
Modify the test program to exercise the API for both cases: supplying or not
supplying an end of list test function.
git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@136144 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/scripts/Python/modify-python-lldb.py b/scripts/Python/modify-python-lldb.py
index 3a784a6..3cd3126 100644
--- a/scripts/Python/modify-python-lldb.py
+++ b/scripts/Python/modify-python-lldb.py
@@ -89,10 +89,21 @@
# which takes an SBValue and returns True if EOL is reached and False if not.
#
linked_list_iter_def = '''
+ def __eol_test__(val):
+ """Default function for end of list test takes an SBValue object.
+
+ Return True if val is invalid or it corresponds to a null pointer.
+ Otherwise, return False.
+ """
+ if not val or int(val.GetValue(), 0) == 0:
+ return True
+ else:
+ return False
+
# ==================================================
# Iterator for lldb.SBValue treated as a linked list
# ==================================================
- def linked_list_iter(self, next_item_name, end_of_list_test):
+ def linked_list_iter(self, next_item_name, end_of_list_test=__eol_test__):
"""Generator adaptor to support iteration for SBValue as a linked list.
linked_list_iter() is a special purpose iterator to treat the SBValue as
@@ -101,18 +112,11 @@
end-of-list test function which takes an SBValue for an item and returns
True if EOL is reached and False if not.
+ The end_of_list_test arg, if omitted, defaults to the __eol_test__
+ function above.
+
For example,
- def eol(val):
- \'\'\'Test function to determine end of list.\'\'\'
- # End of list is reached if either the value object is invalid
- # or it corresponds to a null pointer.
- if not val or int(val.GetValue(), 16) == 0:
- return True
-
- # Otherwise, return False.
- return False
-
# Get Frame #0.
...
@@ -120,7 +124,7 @@
task_head = frame0.FindVariable('task_head')
...
- for t in task_head.linked_list_iter('next', eol):
+ for t in task_head.linked_list_iter('next'):
print t
"""
try: