ó î%![c@s dZddlZddlmZddlmZddlmZddlmZddlmZddlm Z dd lm Z dd lm Z ej j jZd „Zd „Zdd „Zdd„Zdd„Zdd„Zd„Zd„Zd„Zd„ZdS(s Various helper utilities. i˙˙˙˙N(tbases(tcontext(t exceptions(tmanager(tnodes(t raw_building(t scoped_nodes(tutilcCstj|ƒ}||_|S(N(Rt build_classtparent(tcls_nametbuiltinstproxy((s.lib/python2.7/site-packages/astroid/helpers.pyt_build_proxy_classs cCs t|tjƒr9|jƒjtkr0d}q“d}nZt|tjƒrftj r]d}q“d}n-t|tj ƒr“tj rŠd}q“d}nt ||ƒS(Ntbuiltin_function_or_methodtfunctiontinstancemethodtmethod( t isinstanceRtLambdatroottnametBUILTINSRt BoundMethodtsixtPY2t UnboundMethodR (RR R ((s.lib/python2.7/site-packages/astroid/helpers.pyt_function_type!s        ccsótjƒ}|jt}|p(tjƒ}xÁ|jd|ƒD]­}t|tj ƒr”|j r|j ƒ}|r|Vq>qn|j dƒdVq>t|tj tjfƒrŔt||ƒVq>t|tjƒrătd|ƒVq>|jVq>WdS(NRttypeitmodule(RtAstroidManagert astroid_cacheRt contextmodtInferenceContexttinferRRtClassDeftnewstylet metaclasstgetattrRRRRtModuleR t_proxied(tnodeRtastroid_managerR tinferredR%((s.lib/python2.7/site-packages/astroid/helpers.pyt _object_type4s      cCsbytt||ƒƒ}Wntjk r3tjSXt|ƒdksM| rTtjSt|ƒdS(sUObtain the type of the given node This is used to implement the ``type`` builtin, which means that it's used for inferring type calls, as well as used in a couple of other places in the inference. The node will be inferred first, so this function can support all sorts of objects, as long as they support inference. ii(tsetR,RtInferenceErrorRt Uninferabletlentlist(R)Rttypes((s.lib/python2.7/site-packages/astroid/helpers.pyt object_typeIs cCsyy"|jd|ƒ}t|ƒ}Wntjk r9dSXyt|ƒdSWn&tjk rcdStk rt|SXdS(sĄReturn the inferred value for the given node. Return None if inference failed or if there is some ambiguity (more than one node has been inferred). RN(R"tnextRR.tNonet StopIteration(R)Rtinferittvalue((s.lib/python2.7/site-packages/astroid/helpers.pyt safe_infer\s  cCs‘y |jSWntk rnXxb|jD]W}t|d|ƒ}t|tjƒ ss||ksst|d|ƒ r)t|_tSq)Wt |_t S(s=Return true if all base classes of a class could be inferred.R( t_all_bases_knowntAttributeErrorRR9RRR#thas_known_basestFalsetTrue(tklassRtbasetresult((s.lib/python2.7/site-packages/astroid/helpers.pyR<ps     cCsttt||fƒƒs'tj‚nt|j|jgƒsCtSy||jƒd kSWntjk rztj‚nXdS(Ni˙˙˙˙( talltmapR<Rt_NonDeducibleTypeHierarchyR$R=tmrotMroError(ttype1ttype2((s.lib/python2.7/site-packages/astroid/helpers.pyt _type_check‚s cCs t||ƒS(s(Check if *type1* is a subtype of *typ2*.(RI(RGRH((s.lib/python2.7/site-packages/astroid/helpers.pyt is_subtypescCs t||ƒS(s+Check if *type2* is a supertype of *type1*.(RI(RGRH((s.lib/python2.7/site-packages/astroid/helpers.pyt is_supertype”scCsĂtjƒ}tjd|gƒ|_y„x}|jdd|ƒD]f}t|tjƒs[q=nxE|j|d|ƒD].}t|t j ƒrqt|j t ƒrq|SqqWq=WWnt jk ržnXdS(sęGet the value as an index for the given instance. If an instance provides an __index__ method, then it can be used in some scenarios where an integer is expected, for instance when multiplying or subscripting a list. targst __index__RN(R R!t CallContextt callcontexttigetattrRRRtinfer_call_resultRtConstR8tintRR.R5(R)RR+RA((s.lib/python2.7/site-packages/astroid/helpers.pytclass_instance_as_index™s (t__doc__RtastroidRRR RRRRRRtmovesR t__name__RR RR5R,R3R9R<RIRJRKRT(((s.lib/python2.7/site-packages/astroid/helpers.pyt s(