# Path: pydsl/grammar/symbol.py
# class TerminalSymbol(Symbol):
# 
#     def __init__(self, gd):
#         if not isinstance(gd, Grammar):
#             raise TypeError("Expected Grammar, got %s" % (gd,))
#         Symbol.__init__(self)
#         if not gd:
#             raise Exception
#         self.gd = gd
# 
#     def __hash__(self):
#         return hash(self.gd)
# 
#     def check(self, data):# ->bool:
#         """Checks if input is recognized as this symbol"""
#         return check(self.gd, data)
# 
#     def first(self):
#         return self.gd.first
# 
#     def __eq__(self, other):
#         """StringTerminalSymbol are equals if definition and names are equal"""
#         try:
#             return self.gd == other.gd
#         except AttributeError:
#             return False
# 
#     def __str__(self):
#         return "<TS: " + str(self.gd) + ">"
# 
# class NonTerminalSymbol(str, Symbol):
#     def __init__(self, name):
#         Symbol.__init__(self)
# 
#     def __str__(self):
#         return "<NonTS: " + self + ">"
# 
#     def __hash__(self):
#         return str.__hash__(self)
# 
#     def __eq__(self, other):
#         if not isinstance(other, NonTerminalSymbol):
#             return False
#         return str.__eq__(self,other)
# 
# class NullSymbol(Symbol):
#     _instance = None
#     def __new__(cls):
#         if not cls._instance:
#             cls._instance = super(NullSymbol, cls).__new__(cls)
#         return cls._instance
# 
#     def __eq__(self, other):
#         return isinstance(other, NullSymbol)
# 
#     def __ne__(self, other):
#         return not self.__eq__(other)
# 
#     def __bool__(self):
#         return False
# 
# Path: pydsl/grammar/BNF.py
# class Production(object):
# 
#     def __init__(self, leftside, rightside):
#         # Left side must have at least one non terminal symbol
#         for element in rightside:
#             if not isinstance(element, Symbol):
#                 raise TypeError
#         self.leftside = tuple(leftside)
#         self.rightside = tuple(rightside)
# 
#     def __str__(self):
#         leftstr = " ".join([x for x in self.leftside])
#         rightstr = " ".join([str(x) for x in self.rightside])
#         return leftstr + "::=" + rightstr
# 
#     def __eq__(self, other):
#         try:
#             if len(self.leftside) != len(other.leftside):
#                 return False
#             if len(self.rightside) != len(other.rightside):
#                 return False
#             if not list_eq(self.leftside, other.leftside):
#                 return False
#             if not list_eq(self.rightside, other.rightside):
#                 return False
#         except AttributeError:
#             return False
#         return True
# 
#     def __hash__(self):
#         return hash(self.leftside) & hash(self.rightside)


import logging
import re
from pydsl.grammar.symbol import TerminalSymbol, NonTerminalSymbol, NullSymbol
from pydsl.grammar.BNF import Production
    from pydsl.grammar.definition import String
    from pydsl.grammar.BNF import BNFGrammar
        raise TypeError
    content = tail
    if len(tail) > 2 and tail[1][0] == "'" and tail[1][-1] == "'":
        content = tail[1][1:-1]
    return TerminalSymbol(String(content))

def __generateWordSymbol(rightside, repository):
    args = rightside.split(",")
    if args[0] != "Word":
        raise TypeError
    return TerminalSymbol(repository[args[1]])


def read_nonterminal_production(line, symboldict):
    sidesarray = line.split("::=")
    if len(sidesarray) < 2 or len(sidesarray) > 3:
        raise ValueError("Error reading nonterminal production rule")
    leftside = sidesarray[0].strip()
    #leftside contains at least one NonTerminalSymbol
    #FIXME supports only one symbol
    symboldict[leftside] = NonTerminalSymbol(leftside)
    rightside = sidesarray[1]
    alternatives = [alt.rstrip() for alt in rightside.split("|")]
    result = []
    n = 0
    for alternative in alternatives:
        symbollist = alternative.split()
        symbolinstancelist = []
        for symbol in symbollist:
            symbolinstancelist.append(symboldict[symbol])

# Path: pydsl/grammar/symbol.py
# class TerminalSymbol(Symbol):
# 
#     def __init__(self, gd):
#         if not isinstance(gd, Grammar):
#             raise TypeError("Expected Grammar, got %s" % (gd,))
#         Symbol.__init__(self)
#         if not gd:
#             raise Exception
#         self.gd = gd
# 
#     def __hash__(self):
#         return hash(self.gd)
# 
#     def check(self, data):# ->bool:
#         """Checks if input is recognized as this symbol"""
#         return check(self.gd, data)
# 
#     def first(self):
#         return self.gd.first
# 
#     def __eq__(self, other):
#         """StringTerminalSymbol are equals if definition and names are equal"""
#         try:
#             return self.gd == other.gd
#         except AttributeError:
#             return False
# 
#     def __str__(self):
#         return "<TS: " + str(self.gd) + ">"
# 
# class NonTerminalSymbol(str, Symbol):
#     def __init__(self, name):
#         Symbol.__init__(self)
# 
#     def __str__(self):
#         return "<NonTS: " + self + ">"
# 
#     def __hash__(self):
#         return str.__hash__(self)
# 
#     def __eq__(self, other):
#         if not isinstance(other, NonTerminalSymbol):
#             return False
#         return str.__eq__(self,other)
# 
# class NullSymbol(Symbol):
#     _instance = None
#     def __new__(cls):
#         if not cls._instance:
#             cls._instance = super(NullSymbol, cls).__new__(cls)
#         return cls._instance
# 
#     def __eq__(self, other):
#         return isinstance(other, NullSymbol)
# 
#     def __ne__(self, other):
#         return not self.__eq__(other)
# 
#     def __bool__(self):
#         return False
# 
# Path: pydsl/grammar/BNF.py
# class Production(object):
# 
#     def __init__(self, leftside, rightside):
#         # Left side must have at least one non terminal symbol
#         for element in rightside:
#             if not isinstance(element, Symbol):
#                 raise TypeError
#         self.leftside = tuple(leftside)
#         self.rightside = tuple(rightside)
# 
#     def __str__(self):
#         leftstr = " ".join([x for x in self.leftside])
#         rightstr = " ".join([str(x) for x in self.rightside])
#         return leftstr + "::=" + rightstr
# 
#     def __eq__(self, other):
#         try:
#             if len(self.leftside) != len(other.leftside):
#                 return False
#             if len(self.rightside) != len(other.rightside):
#                 return False
#             if not list_eq(self.leftside, other.leftside):
#                 return False
#             if not list_eq(self.rightside, other.rightside):
#                 return False
#         except AttributeError:
#             return False
#         return True
# 
#     def __hash__(self):
#         return hash(self.leftside) & hash(self.rightside)


# Path: pydsl/file/BNF.py
import logging
import re
from pydsl.grammar.symbol import TerminalSymbol, NonTerminalSymbol, NullSymbol
from pydsl.grammar.BNF import Production
    from pydsl.grammar.definition import String
    from pydsl.grammar.BNF import BNFGrammar

        raise TypeError
    content = tail
    if len(tail) > 2 and tail[1][0] == "'" and tail[1][-1] == "'":
        content = tail[1][1:-1]
    return TerminalSymbol(String(content))

def __generateWordSymbol(rightside, repository):
    args = rightside.split(",")
    if args[0] != "Word":
        raise TypeError
    return TerminalSymbol(repository[args[1]])


def read_nonterminal_production(line, symboldict):
    sidesarray = line.split("::=")
    if len(sidesarray) < 2 or len(sidesarray) > 3:
        raise ValueError("Error reading nonterminal production rule")
    leftside = sidesarray[0].strip()
    #leftside contains at least one NonTerminalSymbol
    #FIXME supports only one symbol
    symboldict[leftside] = NonTerminalSymbol(leftside)
    rightside = sidesarray[1]
    alternatives = [alt.rstrip() for alt in rightside.split("|")]
    result = []
    n = 0
    for alternative in alternatives:
        symbollist = alternative.split()
        symbolinstancelist = []
        for symbol in symbollist:
            symbolinstancelist.append(symboldict[symbol])

        result.append(Production([symboldict[leftside]], symbolinstancelist))