/
parser.py
35 lines (27 loc) · 1.12 KB
/
parser.py
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from pyparsing import OneOrMore, Group, Suppress, oneOf, Word, opAssoc, operatorPrecedence, alphanums
from fofTypes import *
fof_binary_symbols = [ "|", "&", "=>", "<=", "~&", "~|", "<=>", "<~>" ]
fof_lambda = ( lambda s,l,t: BinaryOperand(t[0][1],t[0][0],t[0][2]) )
#def bla(s, l, t):
#
# print(s,type(s))
# print(l,type(l))
# print(t[0],type(t[0]))
# print("------------")
# return fof_lambda(s,l,t)
fof_binary_operators = [ (op, 2, opAssoc.LEFT, fof_lambda ) for op in fof_binary_symbols ]
fof_operand = Word("abcdefghijklmnopqrstuvwxzy").setParseAction(Identifier) | oneOf("true false")
fof_expr = operatorPrecedence( fof_operand,
[ ("~", 1, opAssoc.RIGHT, lambda s,l,t: UnaryOperand(s,t[1])) ] + fof_binary_operators )
komma = Suppress(",")
dot = Suppress(".")
tptp = OneOrMore(
Group( oneOf("fof") + Suppress("(") +
Word(alphanums) + komma +
oneOf("axiom theorem") + komma +
fof_expr + Suppress(")") + dot))
def parse_string(string):
return tptp.parseString(string)
def parse_file(filename):
with open(filename) as f:
return (parse_string(f.read()))