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# Generated by re2py
# re2py $INPUT -o $OUTPUT
# expect a string without terminating null
def lex(str):
cur = 0
lim = len(str)
count = 0
while True:
yystate = 0
while True:
match yystate:
case 0:
yych = str[cur] if cur < lim else 0
cur += 1
if yych <= 0x20:
if yych <= 0x00:
yystate = 1
continue
if yych <= 0x1F:
yystate = 2
continue
yystate = 3
continue
else:
if yych <= 0x60:
yystate = 2
continue
if yych <= 0x7A:
yystate = 4
continue
yystate = 2
continue
case 1:
return count
case 2:
return -1
case 3:
yych = str[cur] if cur < lim else 0
if yych == 0x20:
cur += 1
yystate = 3
continue
break
case 4:
yych = str[cur] if cur < lim else 0
if yych <= 0x60:
yystate = 5
continue
if yych <= 0x7A:
cur += 1
yystate = 4
continue
yystate = 5
continue
case 5:
count += 1
break
case _:
raise "internal lexer error"
assert lex(b"") == 0
assert lex(b"one two three") == 3
assert lex(b"f0ur") == -1
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