nilesrogoff/pycoolc
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cleaned up

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Niles Rogoff 2017-03-22 09:04:22 -04:00
parent 26d83f08dc
commit 4c4220cdb7
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GPG Key ID: B78B908F23430F80
1 changed files with 39 additions and 46 deletions
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nfa.py
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@ -74,18 +74,7 @@ def union(a, b):
r.add(e) r.add(e)
return r return r
# def add_epsilon_moves(s): # needs to be redone from scratch def add_epsilon_moves(s, ignore=set()):
# # new_s = set(s)
# new_s = set()
# for state in s:
# new_s.add(state)
# for possible_move in state.moves['ε']:
# #new_s.add(possible_move)
# #new_s = union(new_s, add_epsilon_moves(set([possible_move])))
# for m in add_epsilon_moves(set([possible_move])):
# new_s.add(m)
# return new_s
def add_epsilon_moves(s, ignore=set()): # needs to be redone from scratch
new_s = set(s) new_s = set(s)
if len(ignore) == 0: ignore = new_s if len(ignore) == 0: ignore = new_s
for state in s: for state in s:
@ -98,7 +87,7 @@ def add_epsilon_moves(s, ignore=set()): # needs to be redone from scratch
new_s.add(m) new_s.add(m)
return new_s return new_s
def compute(f, inp): def match(f, inp):
states = set([f.start]) states = set([f.start])
idx = 0 idx = 0
while idx < len(inp): while idx < len(inp):
@ -119,36 +108,6 @@ def compute(f, inp):
return True return True
return False return False
full = concatenate(build_from_char('a'), build_from_char('b'))
full2 = concatenate(iterate(build_from_char('a')), build_from_char('b'))
# strings = ["aa", "ab", "ba", "bb", "aba", "aab", "aaab", "aaba", "b"]
# for s in strings:
# print("String " + s + " " + ("matches" if compute(full, s) else "does not match") + " pattern " + "ab")
# print()
# for s in strings:
# print("String " + s + " " + ("matches" if compute(full2, s) else "does not match") + " pattern " + "a*b")
#print(compute(full2, "aab"))
def addr(node):
#return str(node).split()[3].replace(">", "").replace("0x", "_")
return str(node.id)
def pmap(f):
print("digraph test {")
for node in f.nodes:
for char, move in node.moves.items():
if char == 'ε':
for m in move:
print(addr(node) + " -> " + addr(m) + " [label=epsilon]")
else:
print(addr(node) + " -> " + addr(move) + " [label="+char+"]")
if node.terminal:
print(addr(node) + " -> " + addr(node) + " [label=terminal]")
print(addr(f.start) + " -> " + addr(f.start) + " [label=start]")
print("}")
#pmap(full2)
#pmap(iterate(a))
def list_to_field(l): def list_to_field(l):
if len(l) == 0: if len(l) == 0:
@ -188,11 +147,45 @@ def build_from_regex(regex):
else: else:
to_concat.append(build_from_char(regex[i])) to_concat.append(build_from_char(regex[i]))
return list_to_field(to_concat) return list_to_field(to_concat)
def addr(node):
return str(node.id)
def pmap(f):
print("digraph test {")
for node in f.nodes:
for char, move in node.moves.items():
if char == 'ε':
for m in move:
print(addr(node) + " -> " + addr(m) + " [label=epsilon]")
else:
print(addr(node) + " -> " + addr(move) + " [label="+char+"]")
if node.terminal:
print(addr(node) + " -> " + addr(node) + " [label=terminal]")
print(addr(f.start) + " -> " + addr(f.start) + " [label=start]")
print("}")
# DEBUG
# full = concatenate(build_from_char('a'), build_from_char('b'))
# full2 = concatenate(iterate(build_from_char('a')), build_from_char('b'))
# strings = ["aa", "ab", "ba", "bb", "aba", "aab", "aaab", "aaba", "b"]
# for s in strings:
# print("String " + s + " " + ("matches" if match(full, s) else "does not match") + " pattern " + "ab")
# print()
# for s in strings:
# print("String " + s + " " + ("matches" if match(full2, s) else "does not match") + " pattern " + "a*b")
#print(match(full2, "aab"))
#pmap(full2)
#pmap(iterate(a))
#pmap(build_from_regex("ab(c1+2d(e*f)d)*e")) #pmap(build_from_regex("ab(c1+2d(e*f)d)*e"))
#pmap(either(build_from_char('a'), build_from_char('b'))) #pmap(either(build_from_char('a'), build_from_char('b')))
# x = build_from_regex("(1+0)*1") # x = build_from_regex("(1+0)*1")
# #pmap(x) # #pmap(x)
# for s in ["101", "111110", "11001", "1", "0"]: # for s in ["101", "111110", "11001", "1", "0"]:
# print(compute(x, s)) # print(match(x, s))
x = build_from_regex("a+b+c") # x = build_from_regex("a+b+c")
pmap(x) # pmap(x)