o Zh@sdZddlmZmZddlmZddlmZGdddeZ GdddeZ Gd d d e Z Gd d d Z d dZGdddZdS)a The ``Parser`` tries to convert the available Python code in an easy to read format, something like an abstract syntax tree. The classes who represent this tree, are sitting in the :mod:`parso.tree` module. The Python module ``tokenize`` is a very important part in the ``Parser``, because it splits the code into different words (tokens). Sometimes it looks a bit messy. Sorry for that! You might ask now: "Why didn't you use the ``ast`` module for this? Well, ``ast`` does a very good job understanding proper Python code, but fails to work as soon as there's a single line of broken code. There's one important optimization that needs to be known: Statements are not being parsed completely. ``Statement`` is just a representation of the tokens within the statement. This lowers memory usage and cpu time and reduces the complexity of the ``Parser`` (there's another parser sitting inside ``Statement``, which produces ``Array`` and ``Call``). )DictType)tree)ReservedStringc@eZdZdZddZdS)ParserSyntaxErrorz_ Contains error information about the parser tree. May be raised as an exception. cCs||_||_dSN)message error_leaf)selfr r r C/var/www/html/lang_env/lib/python3.10/site-packages/parso/parser.py__init__& zParserSyntaxError.__init__N__name__ __module__ __qualname____doc__rr r r r r s rc@r)InternalParseErrorz Exception to signal the parser is stuck and error recovery didn't help. Basically this shouldn't happen. It's a sign that something is really wrong. cCs6t|d||j||f||_t|_||_||_dS)Nz#%s: type=%r, value=%r, start_pos=%r) Exceptionrnamemsgtypevalue start_pos)r rtype_rrr r r r2s  zInternalParseError.__init__Nrr r r r r+s rc@seZdZddZdS)Stackcsfdd}t|S)Nc3sJtD]}|jjD]}t|tr|jVq |Vq |jjs"dSqdSr)reverseddfa transitions isinstancerris_final)Z stack_node transitionr r r iterate=s    z@Stack._allowed_transition_names_and_token_types..iterate)list)r r%r r$r )_allowed_transition_names_and_token_types<s  z/Stack._allowed_transition_names_and_token_typesN)rrrr'r r r r r;s rc@s(eZdZddZeddZddZdS) StackNodecCs||_g|_dSr)rnodes)r rr r r rMrzStackNode.__init__cCs|jjSr)r from_ruler$r r r nonterminalQszStackNode.nonterminalcCsd|jj|j|jfS)Nz %s(%s, %s)) __class__rrr)r$r r r __repr__UszStackNode.__repr__N)rrrrpropertyr+r-r r r r r(Ls   r(cCs.|jjrz|j|WStyY|Sw|Sr)rZcontains_syntaxZreserved_syntax_stringsKeyError)grammarrrr r r _token_to_transitionYs  r1c@seZdZUdZiZeeeej fe d<ej Z iZ eeeejfe d<ejZdddZdd Zd d Zd d ZddZddZddZdS) BaseParseraIParser engine. A Parser instance contains state pertaining to the current token sequence, and should not be used concurrently by different threads to parse separate token sequences. See python/tokenize.py for how to get input tokens by a string. When a syntax error occurs, error_recovery() is called. node_mapleaf_map file_inputFcCs||_||_||_dSr) _pgen_grammar_start_nonterminal_error_recovery)r Z pgen_grammarZstart_nonterminalerror_recoveryr r r rws zBaseParser.__init__cCs|jj|jd}tt|g|_|D]}||q |jd}|jjs/t d|j |j |j t |jdkr;|n||j|jSq)NrTzincomplete input)r6Znonterminal_to_dfasr7rr(stack _add_tokenrr"rrstringrlen_pop convert_noder+r))r tokensZ first_dfatokentosr r r parse|s   zBaseParser.parsecCs4|jrtd|\}}}}t||||}td|)Nz!Error Recovery is not implementedzSyntaxError: invalid syntax)r8NotImplementedErrorrZ ErrorLeafr)r rCrrrprefixr r r r r9s   zBaseParser.error_recoverycCs6z |j||}W|Sty|||}Y|Swr)r3r/ default_node)r r+childrennoder r r rAs zBaseParser.convert_nodecCs6z |j||||WSty||||YSwr)r4r/ default_leaf)r rrrGrr r r convert_leafs  zBaseParser.convert_leafc Cs|j}|j}|\}}}}t|||} z |djj|} Wn*ty9|djjr/|n||YdSYnt yFt d|||wq| j |d_| j D] } | t| qQ|||||} |dj | dS)z This is the only core function for parsing. Here happens basically everything. Everything is well prepared by the parser generator and we only apply the necessary steps here. Tr:Nztoo much input)r6r<r1rr r/r"r@r9 IndexErrorrZnext_dfaZ dfa_pushesappendr(rLr)) r rCr0r<rrrrGr#Zplanpushleafr r r r=s.        zBaseParser._add_tokencCsL|j}t|jdkr|jd}n ||jj|j}|jdj|dS)Nr;rr:)r<popr?r)rArr*rN)r rDnew_noder r r r@s  zBaseParser._popN)r5F)rrrrr3rstrrrZBaseNode__annotations__NoderHr4ZLeafrKrrEr9rArLr=r@r r r r r2es    r2N)rtypingrrZparsorZparso.pgen2.generatorrrrrr&rr(r1r2r r r r s