Question

尝试解析表达式名（ARG1，ARG2 ...）

所以我试试：

from pypeg2 import *

class Type (str):
    grammar = attr ('type', re.compile (r'[a-z]+'))

class args (List):
    grammar = maybe_some ( csl (word) )

class Gen (str):
    grammar = Type, '(', args, ')'

首先我尝试从List中派生出Gen，但后来我得到了 GrammarTypeError：在语法中：＆＃39;（＆＃39;

我不明白从＆＃39; str＆＃39;或从＆＃39; List＆＃39;衍生出来的意义。我在哪里可以找到解释？

Answer 1

尝试此更改：

from __future__ import unicode_literals, print_function
import re
from pypeg2 import *

class Type (str):
    grammar = attr ('type', Symbol)

class args (List):
    grammar = maybe_some ( csl (word) )

class Gen (str):
    grammar = Type, '(', args, ')'

teste = "name(arg1,arg2, arg3)"

k = parse(teste, Gen)

print(k)

pypeg：str或List是什么意思？

1 个答案: