blob: f042f3c951181ace3716f9b366cf34727bae8675 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
import ast
import re
import pyparsing
# TODO: There is a lot of work to be done here.
# The current implementation is written in a way that _any_ input is valid,
# which does not make sense once things get more complex.
PartialQuotedString = pyparsing.Regex(
re.compile(
r'''
(["']) # start quote
(?:
(?!\1)[^\\] # unescaped character that is not our quote nor the begin of an escape sequence. We can't use \1 in []
|
(?:\\.) # escape sequence
)*
(?:\1|$) # end quote
''',
re.VERBOSE
)
)
expr = pyparsing.ZeroOrMore(
PartialQuotedString
| pyparsing.Word(" \r\n\t")
| pyparsing.CharsNotIn("""'" \r\n\t""")
).leaveWhitespace()
def quote(val: str) -> str:
if val and all(char not in val for char in "'\" \r\n\t"):
return val
return repr(val) # TODO: More of a hack.
def unquote(x: str) -> str:
quoted = (
(x.startswith('"') and x.endswith('"'))
or
(x.startswith("'") and x.endswith("'"))
)
if quoted:
try:
x = ast.literal_eval(x)
except Exception:
x = x[1:-1]
return x
|
