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import sys
from dreamcoder.program import Primitive
from dreamcoder.grammar import Grammar
from dreamcoder.type import arrow, tpregex
from string import printable
try:
from pregex import pregex
except:
print("Failure to load pregex. This is only acceptable if using pypy",file=sys.stderr)
# evaluation to regular regex form. then I can unflatten using Luke's stuff.
def _kleene(x): return pregex.KleeneStar(x, p=0.25)
def _plus(x): return pregex.Plus(x, p=0.25)
def _maybe(x): return pregex.Maybe(x)
# maybe should be reversed#"(" + x + "|" + y + ")"
def _alt(x): return lambda y: pregex.Alt([x, y])
def _concat(x): return lambda y: pregex.Concat([x, y]) # "(" + x + y + ")"
#For sketch:
def _kleene_5(x): return pregex.KleeneStar(x)
def _plus_5(x): return pregex.Plus(x)
disallowed = [
("#", "hash"),
("!", "bang"),
("\"", "double_quote"),
("$", "dollar"),
("%", "percent"),
("&", "ampersand"),
("'", "single_quote"),
(")", "left_paren"),
("(", "right_paren"),
("*", "astrisk"),
("+", "plus"),
(",", "comma"),
("-", "dash"),
(".", "period"),
("/", "slash"),
(":", "colon"),
(";", "semicolon"),
("<", "less_than"),
("=", "equal"),
(">", "greater_than"),
("?", "question_mark"),
("@", "at"),
("[", "left_bracket"),
("\\", "backslash"),
("]", "right_bracket"),
("^", "carrot"),
("_", "underscore"),
("`", "backtick"),
("|", "bar"),
("}", "right_brace"),
("{", "left_brace"),
("~", "tilde"),
(" ", "space"),
("\t", "tab")
]
disallowed_list = [char for char, _ in disallowed]
class PRC(): #PregexContinuation
def __init__(self, f, arity=0, args=[]):
self.f = f
self.arity = arity
self.args = args
def __call__(self, pre):
if self.arity == len(self.args):
if self.arity == 0: return pregex.Concat([self.f, pre])
elif self.arity == 1: return pregex.Concat([self.f(*self.args), pre])
else: return pregex.Concat([self.f(self.args), pre]) #this line is bad, need brackets around input to f if f is Alt
else: return PRC(self.f, self.arity, args=self.args+[pre(pregex.String(""))])
def concatPrimitives():
return [Primitive("string_" + i, arrow(tpregex, tpregex), PRC(pregex.String(i))) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, arrow(tpregex, tpregex), PRC(pregex.String(char))) for char, name in disallowed
] + [
Primitive("r_dot", arrow(tpregex, tpregex), PRC(pregex.dot)),
Primitive("r_d", arrow(tpregex, tpregex), PRC(pregex.d)),
Primitive("r_s", arrow(tpregex, tpregex), PRC(pregex.s)),
Primitive("r_w", arrow(tpregex, tpregex), PRC(pregex.w)),
Primitive("r_l", arrow(tpregex, tpregex), PRC(pregex.l)),
Primitive("r_u", arrow(tpregex, tpregex), PRC(pregex.u)),
#todo
Primitive("r_kleene", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.KleeneStar,1)),
Primitive("r_plus", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Plus,1)),
Primitive("r_maybe", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Maybe,1)),
Primitive("r_alt", arrow(arrow(tpregex, tpregex) , arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Alt, 2)),
]
def strConstConcatPrimitives():
return [Primitive("string_" + i, arrow(tpregex, tpregex), PRC(pregex.String(i))) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, arrow(tpregex, tpregex), PRC(pregex.String(char))) for char, name in disallowed
] + [
Primitive("r_dot", arrow(tpregex, tpregex), PRC(pregex.dot)),
Primitive("r_d", arrow(tpregex, tpregex), PRC(pregex.d)),
Primitive("r_s", arrow(tpregex, tpregex), PRC(pregex.s)),
Primitive("r_w", arrow(tpregex, tpregex), PRC(pregex.w)),
Primitive("r_l", arrow(tpregex, tpregex), PRC(pregex.l)),
Primitive("r_u", arrow(tpregex, tpregex), PRC(pregex.u)),
#todo
Primitive("r_kleene", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.KleeneStar,1)),
Primitive("r_plus", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Plus,1)),
Primitive("r_maybe", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Maybe,1)),
Primitive("r_alt", arrow(arrow(tpregex, tpregex) , arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Alt, 2)),
] + [
Primitive("r_const", arrow(tpregex, tpregex), None)
]
def reducedConcatPrimitives():
#uses strConcat!!
#[Primitive("empty_string", arrow(tpregex, tpregex), PRC(pregex.String("")))
#] + [
return [Primitive("string_" + i, arrow(tpregex, tpregex), PRC(pregex.String(i))) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, arrow(tpregex, tpregex), PRC(pregex.String(char))) for char, name in disallowed
] + [
Primitive("r_dot", arrow(tpregex, tpregex), PRC(pregex.dot)),
Primitive("r_d", arrow(tpregex, tpregex), PRC(pregex.d)),
Primitive("r_s", arrow(tpregex, tpregex), PRC(pregex.s)),
#Primitive("r_w", arrow(tpregex, tpregex), PRC(pregex.w)),
Primitive("r_l", arrow(tpregex, tpregex), PRC(pregex.l)),
Primitive("r_u", arrow(tpregex, tpregex), PRC(pregex.u)),
#todo
Primitive("r_kleene", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.KleeneStar,1)),
#Primitive("r_plus", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Plus,1)),
Primitive("r_maybe", arrow(arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Maybe,1)),
Primitive("r_alt", arrow(arrow(tpregex, tpregex) , arrow(tpregex, tpregex), arrow(tpregex,tpregex)), PRC(pregex.Alt, 2)),
] + [
Primitive("r_const", arrow(tpregex, tpregex), None)
]
def sketchPrimitives():
return [Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, tpregex, pregex.String(char)) for char, name in disallowed
] + [
Primitive("r_dot", tpregex, pregex.dot),
Primitive("r_d", tpregex, pregex.d),
Primitive("r_s", tpregex, pregex.s),
Primitive("r_w", tpregex, pregex.w),
Primitive("r_l", tpregex, pregex.l),
Primitive("r_u", tpregex, pregex.u),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene_5),
Primitive("r_plus", arrow(tpregex, tpregex), _plus_5),
Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
def basePrimitives():
return [Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, tpregex, pregex.String(char)) for char, name in disallowed
] + [
Primitive("r_dot", tpregex, pregex.dot),
Primitive("r_d", tpregex, pregex.d),
Primitive("r_s", tpregex, pregex.s),
Primitive("r_w", tpregex, pregex.w),
Primitive("r_l", tpregex, pregex.l),
Primitive("r_u", tpregex, pregex.u),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene),
Primitive("r_plus", arrow(tpregex, tpregex), _plus),
Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
def altPrimitives():
return [
Primitive("empty_string", tpregex, pregex.String(""))
] + [
Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, tpregex, pregex.String(char)) for char, name in disallowed
] + [
Primitive("r_dot", tpregex, pregex.dot),
Primitive("r_d", tpregex, pregex.d),
Primitive("r_s", tpregex, pregex.s),
Primitive("r_w", tpregex, pregex.w),
Primitive("r_l", tpregex, pregex.l),
Primitive("r_u", tpregex, pregex.u),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene),
#Primitive("r_plus", arrow(tpregex, tpregex), _plus),
Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
def alt2Primitives():
return [
Primitive("empty_string", tpregex, pregex.String(""))
] + [
Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, tpregex, pregex.String(char)) for char, name in disallowed
] + [
Primitive("r_dot", tpregex, pregex.dot),
Primitive("r_d", tpregex, pregex.d),
Primitive("r_s", tpregex, pregex.s),
Primitive("r_w", tpregex, pregex.w),
Primitive("r_l", tpregex, pregex.l),
Primitive("r_u", tpregex, pregex.u),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene),
#Primitive("r_plus", arrow(tpregex, tpregex), _plus),
#Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
def easyWordsPrimitives():
return [
Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[10:62] if i not in disallowed_list
] + [
Primitive("r_d", tpregex, pregex.d),
Primitive("r_s", tpregex, pregex.s),
#Primitive("r_w", tpregex, pregex.w),
Primitive("r_l", tpregex, pregex.l),
Primitive("r_u", tpregex, pregex.u),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene),
Primitive("r_plus", arrow(tpregex, tpregex), _plus),
Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
#def _wrapper(x): return lambda y: y
#specials = [".","*","+","?","|"]
"""
>>> import pregex as pre
>>> abc = pre.CharacterClass("abc", [0.1, 0.1, 0.8], name="MyConcept")
>>> abc.sample()
'b'
>>> abc.sample()
'c'
>>> abc.sample()
'c'
>>> abc.match("c")
-0.2231435513142097
>>> abc.match("a")
-2.3025850929940455
>>> abc
MyConcept
>>> x = pre.KleeneStar(abc)
>>> x.match("aabbac")
-16.58809928020405
>>> x.sample()
''
>>> x.sample()
''
>>> x.sample()
'cbcacc'
>>> x
(KleeneStar 0.5 MyConcept)
>>> str(x)
'MyConcept*'
"""
def emp_dot(corpus): return pregex.CharacterClass(printable[:-4], emp_distro_from_corpus(corpus, printable[:-4]), name=".")
def emp_d(corpus): return pregex.CharacterClass(printable[:10], emp_distro_from_corpus(corpus, printable[:10]), name="\\d")
#emp_s = pre.CharacterClass(slist, [], name="emp\\s") #may want to forgo this one.
def emp_dot_no_letter(corpus): return pregex.CharacterClass(printable[:10]+printable[62:], emp_distro_from_corpus(corpus, printable[:10]+printable[62:]), name=".")
def emp_w(corpus): return pregex.CharacterClass(printable[:62], emp_distro_from_corpus(corpus, printable[:62]), name="\\w")
def emp_l(corpus): return pregex.CharacterClass(printable[10:36], emp_distro_from_corpus(corpus, printable[10:36]), name="\\l")
def emp_u(corpus): return pregex.CharacterClass(printable[36:62], emp_distro_from_corpus(corpus, printable[36:62]), name="\\u")
def emp_distro_from_corpus(corpus, char_list):
from collections import Counter
c = Counter(char for task in corpus for example in task.examples for string in example[1] for char in string)
n = sum(c[char] for char in char_list)
return [c[char]/n for char in char_list]
def matchEmpericalPrimitives(corpus):
return lambda: [
Primitive("empty_string", tpregex, pregex.String(""))
] + [
Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[:-4] if i not in disallowed_list
] + [
Primitive("string_" + name, tpregex, pregex.String(char)) for char, name in disallowed
] + [
Primitive("r_dot", tpregex, emp_dot(corpus) ),
Primitive("r_d", tpregex, emp_d(corpus) ),
Primitive("r_s", tpregex, pregex.s),
Primitive("r_w", tpregex, emp_w(corpus) ),
Primitive("r_l", tpregex, emp_l(corpus) ),
Primitive("r_u", tpregex, emp_u(corpus) ),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene),
#Primitive("r_plus", arrow(tpregex, tpregex), _plus),
Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
def matchEmpericalNoLetterPrimitives(corpus):
return lambda: [
Primitive("empty_string", tpregex, pregex.String(""))
] + [
Primitive("string_" + i, tpregex, pregex.String(i)) for i in printable[:-4] if i not in disallowed_list + list(printable[10:62])
] + [
Primitive("string_" + name, tpregex, pregex.String(char)) for char, name in disallowed
] + [
Primitive("r_dot", tpregex, emp_dot_no_letter(corpus) ),
Primitive("r_d", tpregex, emp_d(corpus) ),
Primitive("r_s", tpregex, pregex.s),
Primitive("r_kleene", arrow(tpregex, tpregex), _kleene),
#Primitive("r_plus", arrow(tpregex, tpregex), _plus),
#Primitive("r_maybe", arrow(tpregex, tpregex), _maybe),
Primitive("r_alt", arrow(tpregex, tpregex, tpregex), _alt),
Primitive("r_concat", arrow(tpregex, tpregex, tpregex), _concat),
]
if __name__=='__main__':
concatPrimitives()
from dreamcoder.program import Program
p=Program.parse("(lambda (r_kleene (lambda (r_maybe (lambda (string_x $0)) $0)) $0))")
print(p)
print(p.runWithArguments([pregex.String("")]))
prims = concatPrimitives()
g = Grammar.uniform(prims)
for i in range(100):
prog = g.sample(arrow(tpregex,tpregex))
preg = prog.runWithArguments([pregex.String("")])
print("preg:", preg.__repr__())
print("sample:", preg.sample())
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