python bindings: Add support for translationUnit.reparse().

This is the first step to make the clang_complete vim plugin work with
libclang. Reparsing improves parsing time from 0.8 to 0.25 secs for
one of my LLVM .cpp files.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124956 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/bindings/python/tests/cindex/test_translation_unit.py b/bindings/python/tests/cindex/test_translation_unit.py
index c83c4972ed..f130db6aeb 100644
--- a/bindings/python/tests/cindex/test_translation_unit.py
+++ b/bindings/python/tests/cindex/test_translation_unit.py
@@ -25,6 +25,15 @@ def test_parse_arguments():
     assert spellings[-2] == 'hello'
     assert spellings[-1] == 'hi'
 
+def test_reparse_arguments():
+    path = os.path.join(kInputsDir, 'parse_arguments.c')
+    index = Index.create()
+    tu = index.parse(path, ['-DDECL_ONE=hello', '-DDECL_TWO=hi'])
+    tu.reparse()
+    spellings = [c.spelling for c in tu.cursor.get_children()]
+    assert spellings[-2] == 'hello'
+    assert spellings[-1] == 'hi'
+
 def test_unsaved_files():
     index = Index.create()
     tu = index.parse('fake.c', ['-I./'], unsaved_files = [