diff options
| -rw-r--r-- | bindings/python/clang/cindex.py | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/bindings/python/clang/cindex.py b/bindings/python/clang/cindex.py index ee85585f89..d571b2ade9 100644 --- a/bindings/python/clang/cindex.py +++ b/bindings/python/clang/cindex.py @@ -133,6 +133,31 @@ class TranslationUnitSaveError(Exception): ### Structures and Utility Classes ### +class CachedProperty(object): + """Decorator that lazy-loads the value of a property. + + The first time the property is accessed, the original property function is + executed. The value it returns is set as the new value of that instance's + property, replacing the original method. + """ + + def __init__(self, wrapped): + self.wrapped = wrapped + try: + self.__doc__ = wrapped.__doc__ + except: + pass + + def __get__(self, instance, instance_type=None): + if instance is None: + return self + + value = self.wrapped(instance) + setattr(instance, self.wrapped.__name__, value) + + return value + + class _CXString(Structure): """Helper for transforming CXString results.""" |