ó î%![c@s§dZddlZddlZddlmZddlmZddlmZejd„ƒZ de fd„ƒYZ d „Z ejd „ƒZ ejd „ƒZdS( s) A few useful function/method decorators.i˙˙˙˙N(tcontext(t exceptions(tutilcCsjt|ddƒ}|dkr.i|_}ny ||SWn)tk re|||Ž||<}|SXdS(s>Simple decorator to cache result of method calls without args.t__cacheN(tgetattrtNoneRtKeyError(tfunctinstancetargstkwargstcachetresult((s1lib/python2.7/site-packages/astroid/decorators.pytcacheds   tcachedpropertycBs8eZdZdZd„Zed„ƒZdd„ZRS(s´ Provides a cached property equivalent to the stacking of @cached and @property, but more efficient. After first usage, the becomes part of the object's __dict__. Doing: del obj. empties the cache. Idea taken from the pyramid_ framework and the mercurial_ project. .. _pyramid: http://pypi.python.org/pypi/pyramid .. _mercurial: http://pypi.python.org/pypi/Mercurial twrappedcCsCy |jWn(tk r5tjtd|ƒƒnX||_dS(Ns!%s must have a __name__ attribute(t__name__tAttributeErrorRtreraiset TypeErrorR(tselfR((s1lib/python2.7/site-packages/astroid/decorators.pyt__init__0s    cCs-t|jddƒ}d|r(d|ndS(Nt__doc__s+%ss %st(RRR(Rtdoc((s1lib/python2.7/site-packages/astroid/decorators.pyR8scCs9|dkr|S|j|ƒ}t||jj|ƒ|S(N(RRtsetattrR(Rtinsttobjtypetval((s1lib/python2.7/site-packages/astroid/decorators.pyt__get__>s  (RN(Rt __module__Rt __slots__RtpropertyRR(((s1lib/python2.7/site-packages/astroid/decorators.pyR s   cCs"tj|ƒd|d„ƒ}|S(sĂreturn the given infer function wrapped to handle the path Used to stop inference if the node has already been looked at for a given `InferenceContext` to prevent infinite recursion c {sę|dkrtjƒ}n|j|ƒr.dStƒ}||||}ybx[trŠt|ƒ}|jjdkr|j }n|}||krO|V|j |ƒqOqOWWn8t k rĺ}|j rÜt |j dƒ‚qćt ‚nXdS(s!wrapper function handling contextNtInstancei( Rt contextmodtInferenceContexttpushtsettTruetnextt __class__Rt_proxiedtaddt StopIterationR ( tnodeRt_funcR tyieldedt generatortrestaresterror((s1lib/python2.7/site-packages/astroid/decorators.pyRMs&       N(t functoolstwrapsR(RR((s1lib/python2.7/site-packages/astroid/decorators.pyt path_wrapperFs ccs@t}x"|||ŽD]}t}|VqW|s<tjVndS(N(tFalseR&Rt Uninferable(RRR R tinferredR,((s1lib/python2.7/site-packages/astroid/decorators.pytyes_if_nothing_inferredms  ccs‹t}y1|||Ž}xtr5t|ƒVt}qWWnMtk r†}|s‡|jrqtj|jd‚qƒtjdƒ‚q‡nXdS(sŽAll generators wrapped with raise_if_nothing_inferred *must* explicitly raise StopIteration with information to create an appropriate structured InferenceError. is3StopIteration raised without any error information.N(R6R&R'R+R RtInferenceError(RRR R R8R/R2((s1lib/python2.7/site-packages/astroid/decorators.pytraise_if_nothing_inferredws   (RR3twrapttastroidRR"RRt decoratorR tobjectRR5R9R;(((s1lib/python2.7/site-packages/astroid/decorators.pyts   & '