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from rpython.rlib.parsing.regex import *
from rpython.translator.c.test.test_genc import compile
def compile_rex(rex):
fda = rex.make_automaton().make_deterministic()
fda.optimize()
fn = fda.make_code()
return compile(fn, [str])
def test_simple():
r = StringExpression("hallo")
nda = r.make_automaton()
fda = nda.make_deterministic()
r = fda.get_runner()
assert not r.recognize("halloc")
assert not r.recognize("asf;a")
assert not r.recognize("")
assert r.recognize("hallo")
def test_string_add():
r1 = StringExpression("Hello")
r2 = StringExpression(", World!\n")
fda = (r1 + r2).make_automaton().make_deterministic()
r = fda.get_runner()
assert r.recognize("Hello, World!\n")
assert not r.recognize("asfdasdfasDF")
def test_kleene():
r1 = StringExpression("ab")
r2 = r1.kleene()
nda = r2.make_automaton()
fda = nda.make_deterministic()
r = fda.get_runner()
assert r.recognize("ab")
assert r.recognize("abab")
assert not r.recognize("ababababababb")
def test_or():
r1 = StringExpression("ab").kleene() | StringExpression("cd").kleene()
nda = r1.make_automaton()
fda = nda.make_deterministic()
r = fda.get_runner()
assert r.recognize("ab")
assert r.recognize("cd")
assert r.recognize("")
assert r.recognize("cdcdcdcdcdcdcd")
assert r.recognize("ababababab")
def test_plus():
r1 = +StringExpression("ab")
nda = r1.make_automaton()
fda = nda.make_deterministic()
r = fda.get_runner()
assert r.recognize("ab")
assert not r.recognize("")
assert not r.recognize("aba")
assert r.recognize("abababababab")
def test_even_number_of_as():
a = StringExpression("a")
b = StringExpression("b")
c = StringExpression("c")
rex = (b | c).kleene() | ((b | c).kleene() + a + (b | c).kleene() + a + (b | c).kleene()).kleene()
nda = rex.make_automaton()
fda = nda.make_deterministic()
r = fda.get_runner()
assert r.recognize("abbabbacbabacbabcbabcba")
assert r.recognize("bcbcbcccbcbcbcbbbcbcbcbcbc")
assert not r.recognize("aaa")
assert not r.recognize("acbbcbcaaccacacccc")
assert r.recognize("aaaa")
def test_bigger_than_101001():
O = StringExpression("0")
l = StringExpression("1")
d = O | l
rex = ((l + d + d + d + d + d + +d) | (l + l + d + d + d + d) |
(l + O + l + l + d + d) | (l + O + l + O + l + d))
nda = rex.make_automaton()
fda = nda.make_deterministic()
fda.optimize()
r = fda.get_runner()
assert r.recognize("1000000")
assert r.recognize("101010")
assert r.recognize("101100")
assert r.recognize("110000")
assert not r.recognize("101000")
assert not r.recognize("100111")
recognize = fda.make_code()
assert recognize("1000000")
assert recognize("101010")
assert recognize("101100")
assert recognize("110000")
fn = compile_rex(rex)
assert fn("1000000")
assert fn("101010")
assert fn("101100")
assert fn("110000")
def test_even_length():
a = StringExpression("a")
b = StringExpression("b")
rex = ((a | b) + (a | b)).kleene()
nfa = rex.make_automaton()
dfa = nfa.make_deterministic()
def test_something():
a = StringExpression("a")
b = StringExpression("b")
bb = StringExpression("bb")
l = StringExpression("")
rex = (b | bb | l) + (a + (b | bb | l)).kleene()
nfa = rex.make_automaton()
dfa = nfa.make_deterministic()
dfa.optimize()
def test_range():
lower = RangeExpression("a", "z")
upper = RangeExpression("A", "Z")
atoms = lower + (upper | lower).kleene()
nfa = atoms.make_automaton()
dfa = nfa.make_deterministic()
dfa.optimize()
r = dfa.get_runner()
assert r.recognize("aASsdFAASaSFasdfaSFD")
assert not r.recognize("ASsdFAASaSFasdfaSFD")
fn = compile_rex(atoms)
assert fn("a")
assert fn("aaaaaAAAAaAAzAzaslwer")
def test_not():
r = NotExpression(StringExpression("a"))
nda = r.make_automaton()
fda = nda.make_deterministic()
r = fda.get_runner()
assert not r.recognize("a")
assert r.recognize("b")
assert r.recognize("bbbbbbbb")
assert r.recognize("arstiow2ie34nvarstbbbbbbbb")
def test_empty():
a = StringExpression("a")
empty = StringExpression("")
r = a + (empty | a)
nfa = r.make_automaton()
dfa = nfa.make_deterministic()
dfa.optimize()
r = dfa.get_runner()
assert r.recognize("a")
assert r.recognize("aa")
assert not r.recognize("ab")
assert not r.recognize("aaa")
def test_big_example():
digits = RangeExpression("0", "9")
lower = RangeExpression("a", "z")
upper = RangeExpression("A", "Z")
keywords = ExpressionTag(StringExpression("if") | StringExpression("else") | StringExpression("def") | StringExpression("class"), "keyword")
underscore = StringExpression("_")
atoms = ExpressionTag(lower + (upper | lower | digits | underscore).kleene(), "atom")
vars = underscore | (upper + (upper | lower | underscore | digits)).kleene()
all = keywords | atoms
nfa = all.make_automaton()
dfa = nfa.make_deterministic()
r = dfa.get_runner()
dfa.optimize()
fn = compile_rex(all)
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