-PhdZddlmZddlmZddlmZddlmZddlmZdZdZGdd Z Gd d Z d S) z9 Python Lexical Analyser Lexical Analyser Specification )Actions)DFA)Errors)Machines)Regexpsc eZdZdZdZdZdZdS)Statez This class is used as part of a Plex.Lexicon specification to introduce a user-defined state. Constructor: State(name, token_specifications) Nc"||_||_dSN)nametokens)selfr rs T/var/www/html/test/jupyter/venv/lib/python3.11/site-packages/Cython/Plex/Lexicons.py__init__zState.__init__s  )__name__ __module__ __qualname____doc__r rrrrr r s9 D Frr c4eZdZdZdZdZddZdZdZdZ dS) Lexicona Lexicon(specification) builds a lexical analyser from the given |specification|. The specification consists of a list of specification items. Each specification item may be either: 1) A token definition, which is a tuple: (pattern, action) The |pattern| is a regular axpression built using the constructors defined in the Plex module. The |action| is the action to be performed when this pattern is recognised (see below). 2) A state definition: State(name, tokens) where |name| is a character string naming the state, and |tokens| is a list of token definitions as above. The meaning and usage of states is described below. Actions ------- The |action| in a token specification may be one of three things: 1) A function, which is called as follows: function(scanner, text) where |scanner| is the relevant Scanner instance, and |text| is the matched text. If the function returns anything other than None, that value is returned as the value of the token. If it returns None, scanning continues as if the IGNORE action were specified (see below). 2) One of the following special actions: IGNORE means that the recognised characters will be treated as white space and ignored. Scanning will continue until the next non-ignored token is recognised before returning. TEXT causes the scanned text itself to be returned as the value of the token. 3) Any other value, which is returned as the value of the token. States ------ At any given time, the scanner is in one of a number of states. Associated with each state is a set of possible tokens. When scanning, only tokens associated with the current state are recognised. There is a default state, whose name is the empty string. Token definitions which are not inside any State definition belong to the default state. The initial state of the scanner is the default state. The state can be changed in one of two ways: 1) Using Begin(state_name) as the action of a token. 2) Calling the begin(state_name) method of the Scanner. To change back to the default state, use '' as the state name. Nct|tstjdt j}|d}d}|D]}t|trB||j}|j D]} | ||| ||dz } Yt|tr| |||||dz }tj |d|r/|dzr*| d||tj||dzdko|} |r/|dzr*| d | || |_dS) Nz Scanner definition is not a listrz5Expected a token definition (tuple) or State instancez ============= NFA =========== )debugrz ============= DFA =========== ) isinstancelistrInvalidScannerrMachinenew_initial_stater r radd_token_to_machinetuple InvalidTokenwritedumpr nfa_to_dfamachine) rspecificationsr debug_flagsnfadefault_initial_state token_numberspecuser_initial_statetokendfas rrzLexicon.__init__os.$// L'(JKK K   # 5 5b 9 9 " M MD$&& M%(%:%:49%E%E"![&&E--/ FFF A%LL&D%(( M)).lDDD! ) KMMM  kAo  KK; < < < HHUOOOnSqQ(>(H5III  kAo  KK; < < < HHUOOO rc ||\}}t|tjr|}nA |jtj|}n$#t $rtj|}YnwxYw|}| |||dd| || dS#tj $r} | d|| fzd} ~ wwxYw)Nr) match_bolnocase)priorityzToken number %d: %s)parse_token_definitionrrAction__call__CallAttributeErrorReturn new_state build_machine set_actionr PlexError __class__) rr* initial_state token_specr/re action_specaction final_statees rr$zLexicon.add_token_to_machines+ I $ ; ;J G G R+w~66 7$7((%\+66FF&999$^K88FFF9"++--K   Wm['(  4 4 4  " "6\M " B B B B B I I I++3|Q6GGHH H Is:5CACA52C4A55A CC.C))C.ct|tstjdt |dkrtjd|\}}t|t jstjd||fS)NzToken definition is not a tuplerz)Wrong number of items in token definitionzPattern is not an RE instance)rr%rr&lenrRE)rrEpatternrHs rr9zLexicon.parse_token_definitions*e,, I%&GHH H z??a  %&QRR R$'7:.. G%&EFF F  rc6|j|Sr )r*get_initial_state)rr s rrPzLexicon.get_initial_states|--d333r)Nr) rrrrr*tablesrr$r9rPrrrrr$srEENG F""""HIII& ! ! !44444rrN) rrrrrrrDUMP_NFADUMP_DFAr rrrrrTs   $N4N4N4N4N4N4N4N4N4N4r