python bindings: expose the clang version string

[john.tornblom]

Any suggestions on how to test this? Just check for non-empty string?

[compnerd]

Hmm, could do something devious. Write the test and run that through the c preprocessor and then use that to compare the string. Ugly, but would be completely generic and ensure that we see the value we expect always.

[compnerd]

This would ideally wait for the change that @jbcoe has in the works to enable python 3, but the change itself is fine.

[shafik]

@compnerd is this still relevant?

bindings/python/clang/cindex.py

#  [CXTUResourceUsage]),
    Cursor,
    Cursor.from_cursor_result),
 
   ("clang_getCanonicalType",
    [Type],
    Type,
    Type.from_result),
 
+  ("clang_getClangVersion",
+   [], _CXString),
+    
   ("clang_getCompletionAvailability",
    [c_void_p],
    c_int),
 
   ("clang_getCompletionBriefComment",
    [c_void_p],
    _CXString),
 
class Config:
     def function_exists(self, name):
         try:
             getattr(self.lib, name)
         except AttributeError:
             return False
 
         return True
 
+    @property
+    def version_string(self):
+        """Return a version string, suitable for showing to a user
+
+        The version string is not intended to be parsed, and the format is not
+        guaranteed to be stable.
+        """
+        version = self.lib.clang_getClangVersion()
+        return version.spelling
+
 def register_enumerations():
     for name, value in clang.enumerations.TokenKinds:
         TokenKind.register(value, name)
 
 conf = Config()
 register_enumerations()
 
 __all__ = [