def __init__(self, ptr, sym):
"""
initialization
arguments:
self -
ptr - parse tree
sym - symbol table
exceptions:
FormatFailure on error
"""
self.ptr = ptr
self.sym = sym
self.exs = []
for x in ellyConfiguration.extractors:
proc = x[0]
synt = syntaxSpecification.SyntaxSpecification(sym, x[1].lower())
entry = [proc, synt.catg, synt.synf.positive]
if len(x) > 2:
f = None if x[2] == '-' else x[2].lower()
smnt = featureSpecification.FeatureSpecification(sym, f, True)
entry.append(smnt.positive)
if len(x) > 3:
entry.append(x[3])
self.exs.append(entry)
def __init__ ( self , symtb , defr ):
"""
initialization
arguments:
self -
symtb - symbol table for interpreting syntax
defr - definition input string
"""
self._errcount = 0
# print ( 'defr=' , defr )
ru = defr.split(' : ')
if len(ru) != 2:
self._err('incomplete template',defr)
return
[ elems , defns ] = ru
rw = elems.split(' ')
if len(rw) < 2:
self._err('trivial template',defr)
return
le = [ ]
for w in rw:
# print ( 'w=' , w )
x = w.strip()
lx = len(x)
if lx == 0:
self._err('null template element',defr)
return
if x[0] == '%':
if lx > 1 and ellyChar.isLetter(x[1]):
if lx > 2:
if x[1] != '*':
self._err('bad class ID',defr)
return
x = x.lower()
le.append(x)
if self._errcount > 0: return
self.listing = le
de = defns.split(' ')
lde = len(de)
if lde != 1 and lde != 3:
self._err('bad template definition',defr)
return
syns = de[0]
sems = de[1] if lde > 1 else None
try:
spec = syntaxSpecification.SyntaxSpecification(symtb,syns)
semf = featureSpecification.FeatureSpecification(symtb,sems,True)
except ellyException.FormatFailure:
self._err('bad definition' , defr)
return
self.lstg = le
self.catg = spec.catg
self.synf = spec.synf.positive
self.semf = semf.positive
self.bias = int(de[2]) if lde > 1 else 0
def __init__(self, typ, fet, frs=_dfrs):
"""
initialization
arguments:
self -
typ - syntactic type
fet - syntactic features to set
frs - to reset
"""
super(SplittingRule, self).__init__(typ, fet)
self.ltfet = featureSpecification.FeatureSpecification(None)
self.rtfet = featureSpecification.FeatureSpecification(None)
self.sftr = frs
self.rtyp = -1
self.nmrg = 2
def _FS ( symbls , featrs , ftype=False ):
"""
get ellyBits encoding of syntactic features
arguments:
syms - symbol table for feature names
featrs - feature string
ftype - True for semantic, False for syntactic
returns:
ellyBits object on success
exceptions:
FormatFailure on error
"""
return featureSpecification.FeatureSpecification(symbls,featrs,ftype).positive
def __init__ ( self , syms , spec ):
"""
initialization from input string and symbol table
arguments:
self -
syms - current symbol table
spec - input string
exceptions:
FormatFailure on error
"""
self.catg = -1 # values to set on an error
self.synf = None #
# print >> sys.stderr , 'specification=' , spec
if spec == None:
print >> sys.stderr , '** null syntax specification'
raise ellyException.FormatFailure
s = spec.lower() # must be lower case for all lookups
n = 0
for c in s:
if not ellyChar.isLetterOrDigit(c) and c != '.': break
n += 1
if n == 0:
print >> sys.stderr , '** no syntactic category'
raise ellyException.FormatFailure
typs = s[:n] # save category name
# print >> sys.stderr , 'catg=' , self.catg
catg = syms.getSyntaxTypeIndexNumber(typs)
if catg == None:
raise ellyException.FormatFailure
s = s[n:].strip() # feature part of syntax
if len(s) == 0: # check if there are any features
synf = featureSpecification.FeatureSpecification(syms,None)
if typs == '...':
synf.id = '...'
elif typs == '...': # ... category may have no features!
raise ellyException.FormatFailure
else: # decode features
# print >> sys.stderr , 'syms=' , syms , 's=' , s
if len(s) < 4:
print >> sys.stderr , '** bad syntactic type or missing features= ' , typs+s
raise ellyException.FormatFailure
if typs in catid and catid[typs] != s[1]:
print >> sys.stderr , '** type' , typs.upper() , 'has two feature IDs:' , catid[typs] , s[1]
raise ellyException.FormatFailure
catid[typs] = s[1]
synf = featureSpecification.FeatureSpecification(syms,s)
# FormatFailure exception may be raised above, but will not be caught here
# print >> sys.stderr , 'success'
self.catg = catg
self.synf = synf
def _rightside(stb, txt, sta):
"""
process actions for a clause
arguments:
stb - symbol table
txt - string input for single clause
sta - for status reporting
returns:
action list on success, None otherwise
"""
# print ( "right side" )
actn = []
val = 0
cnc = '' # default is no concept specified
m = txt.rfind(']') # look for semantic features to set or reset
n = txt.rfind(' ') # look for space marking explicit concept
# print ( 'n=',n )
# print ( "0 txt=[" , txt , "]" )
if n > m: # space must not be in semantic feature specification
cnc = txt[n:].strip().upper()
txt = txt[:n] # remove concept from right size of clause
# print ( "1 txt=[" , txt , "]" )
if len(txt) > 1:
if txt[0] == '*': # inherit from phrase component?
c = txt[1]
if c == 'l':
actn.append([semanticCommand.Clhr])
sta.lh = True
elif c == 'r':
actn.append([semanticCommand.Crhr])
sta.rh = True
else:
return _err('bad inheritance')
txt = txt[2:].strip()
# print ( "2 txt=[" , txt , "]" )
if len(txt) > 3 and txt[0] == '[':
n = txt.find(']') # set or unset semantic features for phrase?
# print ( 'n=' , n )
if n < 3:
return _err('incomplete semantic features to set or unset')
try:
f = featureSpecification.FeatureSpecification(stb,
txt[:n + 1],
semantic=True)
sta.res = f
except ellyException.FormatFailure:
return _err('bad semantic features to set or unset')
if sta.id[sS] == None:
sta.id[sS] = f.id
elif f.id != sta.id[sS]:
_err('inconsistency: final features=' + txt[:n + 1])
return None
# print ( 'features=' , f.positive , f.negative )
actn.append([semanticCommand.Csetf, f.positive])
if not f.negative.zeroed():
f.negative.complement()
actn.append([semanticCommand.Crstf, f.negative])
# print ( 'set:' , actn[-1] )
txt = txt[n + 1:]
# print ( "3 txt=[" , txt , "]" )
if len(txt) > 0:
c = txt[0] # check for sign of plausibility change
if c != '+' and c != '-':
if ellyChar.isDigit(c):
return _err('plausibility must begin with + or -')
else:
return _err('bad cognitive semantic action: ' + txt)
# print ( "2 txt=[",txt,"]" )
if len(txt) == 1:
val = 1
elif ellyChar.isDigit(txt[1]):
try:
val = int(txt[1:]) # explicit numerical change
except ValueError:
return _err('bad cognitive plausibility: ' + txt)
elif c == txt[1]: # alternate notation for plausibility change
val = 2
for xc in txt[2:]:
if xc != c:
return _err('must be all + or all -')
val += 1 # count up value
else:
return _err('cannot interpret clause: ' + txt)
if c == '-': val = -val # get right sign
# print ( 'val=' , val )
if len(cnc) > 0:
actn.append([semanticCommand.Csetc, cnc])
if val != 0:
actn.append([semanticCommand.Cadd, val])
return actn
def _leftside(stb, txt, sta):
"""
process conditions for a clause and store
arguments:
stb - symbol table
txt - string input for left side of single clause
sta - for status reporting
returns:
predicate list on success, None otherwise
"""
# print ( "left side" )
pred = []
txt = txt.rstrip()
while len(txt) > 0:
txt = txt.lstrip()
# print ( 'clause=' , txt )
if len(txt) <= 1:
_err('malformed conditions for clause')
return None
side = txt[0]
txt = txt[1:]
if side in ['n', 'p', 'c']:
sns = txt[0]
txt = txt[1:]
if sns != '<' and sns != '>':
_err('invalid comparison in clause condition=' + sns)
return None
if side == 'n':
op = semanticCommand.Cngt if sns == '>' else semanticCommand.Cnlt
elif side == 'p':
op = semanticCommand.Cpgt if sns == '>' else semanticCommand.Cplt
else:
op = semanticCommand.Ccgt if sns == '>' else semanticCommand.Cclt
nd = 0
lt = len(txt)
while nd < lt:
if not ellyChar.isDigit(txt[nd]): break
nd += 1
if nd == 0:
_err('no token count for condition')
return None
test = int(txt[:nd])
txt = txt[nd:]
pred.append([op, test])
continue
if not side in ['l', 'r']:
_err('invalid side for test=' + side)
return None
k = 0
if txt[0] == '[': # semantic feature check?
k = txt.find(']') # if so, look for closing bracket
if k < 0:
return _err('incomplete semantic features to check')
p = txt[:k + 1] # get semantic feature string
# print ( "side:" , side , "test:" , p )
try:
f = featureSpecification.FeatureSpecification(stb,
p,
semantic=True)
except ellyException.FormatFailure:
return _err('bad semantic features to check')
if side == 'l':
if sta.id[lS] == None:
sta.id[lS] = f.id
elif f.id != sta.id[lS]:
_err('inconsistency: left features=' + p)
return None
else:
if sta.id[rS] == None:
sta.id[rS] = f.id
elif f.id != sta.id[rS]:
_err('inconsistency: right features=' + p)
return None
op = semanticCommand.Crhtf if side == 'r' else semanticCommand.Clftf
if side == 'r':
sta.rht = f
else:
sta.lft = f
# print ( 'test:' , f.positive.hexadecimal() , f.negative.hexadecimal() )
test = ellyBits.join(f.positive, f.negative)
# print ( test )
pred.append([op, test])
elif txt[0] == '(': # semantic concept check?
# print ( "txt=\"" + txt +"\"" )
k = txt.find(')') # if so, look for closing parenthesis
if k < 0:
return _err('incomplete concept check')
s = txt[1:k].strip().upper() # normalize concepts
p = s.split(',') # allow for multiple disjunctive checks
# print ( "p=\"" + p + "\"" )
op = semanticCommand.Crhtc if side == 'r' else semanticCommand.Clftc
pred.append([op, p])
else:
_err('unknown test in clause=' + side + txt)
return None
txt = txt[k + 1:].lstrip() # advance to next predicate
# print ( "NEXT" )
return pred
# This information is redundant because every rule will be listed under its
# respective Y type. The parsing algorithm implemented for Elly parse trees
# will have all the information it needs.
###########################################################################
#
# unit test
#
if __name__ == '__main__':
import symbolTable
sym = symbolTable.SymbolTable()
fs = featureSpecification.FeatureSpecification(sym, '[:f0,f1,-f2]')
pf = fs.positive
nf = fs.negative
nf.complement()
print('features=', pf, nf)
r = []
for i in range(4):
ru = ExtendingRule(0, pf, nf)
r.append(ru)
for i in range(4):
ru = SplittingRule(0, pf, nf)
r.append(ru)
rr = ExtendingRule(0, pf)
r.append(rr)
def __init__(self, syms, dfls):
"""
initialization
arguments:
self -
syms - Elly grammatical symbol table
dfls - definition elements in list
exceptions:
FormatFailure on error
"""
# print 'dfls=' , dfls
ne = len(dfls)
# print 'ne=' , ne
if 3 > ne or ne > 5: # must have 3 to 5 elements
raise ellyException.FormatFailure
else:
if dfls[0] == '\\0':
self.patn = u'\x00' # special nul pattern
elif ellyWildcard.numSpaces(list(dfls[0])) > 0:
print >> sys.stderr, '** link pattern includes space:', dfls[0]
raise ellyException.FormatFailure
else:
# print 'do conversion'
self.patn = ellyWildcard.convert(
dfls[0]) # encode Elly pattern
# print 'patn=' , self.patn
if dfls[0] != '$':
if self.patn == None or ellyWildcard.minMatch(self.patn) == 0:
print >> sys.stderr, '** bad link pattern:', dfls[0]
raise ellyException.FormatFailure
# print 'appended patn=' , list(self.patn) , '=' , len(self.patn)
lastat = dfls[-1]
self.catg = None # defaults
self.synf = None #
self.semf = None #
self.bias = 0 #
sss = dfls[1].lower() # assumed not to be Unicode
# print 'sss=' , sss
if sss != '-': # allow for no category
syx = syntaxSpecification.SyntaxSpecification(syms, sss)
if syx != None:
if not lastat in ['-1', '-2'
]: # not a stop state for matching
raise ellyException.FormatFailure # cannot have syntax here
self.catg = syx.catg # syntactic category
self.synf = syx.synf.positive # syntactic features
if ne > 3:
if lastat != '-1': # not a stop state for matching
raise ellyException.FormatFailure # cannot have semantics here
sss = None if dfls[2] == '-' else dfls[2].lower()
else:
sss = None
# print 'semantic features=' , sss
sem = featureSpecification.FeatureSpecification(syms, sss, True)
self.semf = sem.positive # get semantic features
# print 'semf=' , self.semf
if ne > 4:
try:
self.bias = int(dfls[3])
except ValueError:
raise ellyException.FormatFailure # unrecognizable bias
try:
n = int(lastat) # next state for link
except ValueError:
raise ellyException.FormatFailure # unrecognizable number
# print 'transition=' , n
if n < 0: # final transition?
if self.patn == u'\x00':
raise ellyException.FormatFailure # final state not allowed here
if n == -1:
pe = self.patn[-1] # if so, get last pattern element
if (pe != ellyWildcard.cALL
and # final pattern must end with * or $
pe != ellyWildcard.cEND):
self.patn += ellyWildcard.cEND # default is $
print >> sys.stderr, '** final $ added to pattern', list(
self.patn)
self.nxts = n # specify next state
