mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-12-24 12:15:50 +01:00
[jsinterp] Bring on-par with youtube-dl
Code from: https://github.com/ytdl-org/youtube-dl/pull/31175, https://github.com/ytdl-org/youtube-dl/pull/31182 Authored by pukkandan, dirkf
This commit is contained in:
pukkandan
parent
8a3da4c68c
commit
be13a6e525
@ -7,8 +7,10 @@
|
||||
|
||||
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
|
||||
|
||||
import math
|
||||
import re
|
||||
|
||||
from yt_dlp.jsinterp import JSInterpreter
|
||||
from yt_dlp.jsinterp import JS_Undefined, JSInterpreter
|
||||
|
||||
|
||||
class TestJSInterpreter(unittest.TestCase):
|
||||
@ -66,6 +68,9 @@ def test_operators(self):
|
||||
jsi = JSInterpreter('function f(){return 0 && 1 || 2;}')
|
||||
self.assertEqual(jsi.call_function('f'), 2)
|
||||
|
||||
jsi = JSInterpreter('function f(){return 0 ?? 42;}')
|
||||
self.assertEqual(jsi.call_function('f'), 0)
|
||||
|
||||
def test_array_access(self):
|
||||
jsi = JSInterpreter('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2.0] = 7; return x;}')
|
||||
self.assertEqual(jsi.call_function('f'), [5, 2, 7])
|
||||
@ -229,6 +234,119 @@ def test_return_function(self):
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x')([]), 1)
|
||||
|
||||
def test_null(self):
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return null; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), None)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [null > 0, null < 0, null == 0, null === 0]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, False, False, False])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [null >= 0, null <= 0]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [True, True])
|
||||
|
||||
def test_undefined(self):
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return undefined === undefined; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), True)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return undefined; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let v; return v; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [undefined === undefined, undefined == undefined, undefined < undefined, undefined > undefined]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [True, True, False, False])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [undefined === 0, undefined == 0, undefined < 0, undefined > 0]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, False, False, False])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [undefined >= 0, undefined <= 0]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, False])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [undefined > null, undefined < null, undefined == null, undefined === null]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, False, True, False])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [undefined === null, undefined == null, undefined < null, undefined > null]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, True, False, False])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let v; return [42+v, v+42, v**42, 42**v, 0**v]; }
|
||||
''')
|
||||
for y in jsi.call_function('x'):
|
||||
self.assertTrue(math.isnan(y))
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let v; return v**0; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), 1)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let v; return [v>42, v<=42, v&&42, 42&&v]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, False, JS_Undefined, JS_Undefined])
|
||||
|
||||
jsi = JSInterpreter('function x(){return undefined ?? 42; }')
|
||||
self.assertEqual(jsi.call_function('x'), 42)
|
||||
|
||||
def test_object(self):
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return {}; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), {})
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a = {m1: 42, m2: 0 }; return [a["m1"], a.m2]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [42, 0])
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a; return a?.qq; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a = {m1: 42, m2: 0 }; return a?.qq; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
def test_regex(self):
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a=/,,[/,913,/](,)}/; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), None)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a=/,,[/,913,/](,)}/; return a; }
|
||||
''')
|
||||
self.assertIsInstance(jsi.call_function('x'), re.Pattern)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a=/,,[/,913,/](,)}/i; return a; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x').flags & re.I, re.I)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
unittest.main()
|
||||
|
||||
@ -16,50 +16,69 @@
|
||||
write_string,
|
||||
)
|
||||
|
||||
_NAME_RE = r'[a-zA-Z_$][\w$]*'
|
||||
|
||||
# Ref: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence
|
||||
_OPERATORS = { # None => Defined in JSInterpreter._operator
|
||||
'?': None,
|
||||
def _js_bit_op(op):
|
||||
def wrapped(a, b):
|
||||
def zeroise(x):
|
||||
return 0 if x in (None, JS_Undefined) else x
|
||||
return op(zeroise(a), zeroise(b))
|
||||
|
||||
'||': None,
|
||||
'&&': None,
|
||||
'&': lambda a, b: (a or 0) & (b or 0),
|
||||
'|': lambda a, b: (a or 0) | (b or 0),
|
||||
'^': lambda a, b: (a or 0) ^ (b or 0),
|
||||
|
||||
'===': operator.is_,
|
||||
'!==': operator.is_not,
|
||||
'==': operator.eq,
|
||||
'!=': operator.ne,
|
||||
|
||||
'<=': lambda a, b: (a or 0) <= (b or 0),
|
||||
'>=': lambda a, b: (a or 0) >= (b or 0),
|
||||
'<': lambda a, b: (a or 0) < (b or 0),
|
||||
'>': lambda a, b: (a or 0) > (b or 0),
|
||||
|
||||
'>>': operator.rshift,
|
||||
'<<': operator.lshift,
|
||||
|
||||
'+': lambda a, b: (a or 0) + (b or 0),
|
||||
'-': lambda a, b: (a or 0) - (b or 0),
|
||||
|
||||
'*': lambda a, b: (a or 0) * (b or 0),
|
||||
'/': lambda a, b: (a or 0) / b if b else float('NaN'),
|
||||
'%': lambda a, b: (a or 0) % b if b else float('NaN'),
|
||||
|
||||
'**': operator.pow,
|
||||
}
|
||||
|
||||
_COMP_OPERATORS = {'===', '!==', '==', '!=', '<=', '>=', '<', '>'}
|
||||
|
||||
_MATCHING_PARENS = dict(zip('({[', ')}]'))
|
||||
_QUOTES = '\'"/'
|
||||
return wrapped
|
||||
|
||||
|
||||
def _ternary(cndn, if_true=True, if_false=False):
|
||||
def _js_arith_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
if JS_Undefined in (a, b):
|
||||
return float('nan')
|
||||
return op(a or 0, b or 0)
|
||||
|
||||
return wrapped
|
||||
|
||||
|
||||
def _js_div(a, b):
|
||||
if JS_Undefined in (a, b) or not (a and b):
|
||||
return float('nan')
|
||||
return (a or 0) / b if b else float('inf')
|
||||
|
||||
|
||||
def _js_mod(a, b):
|
||||
if JS_Undefined in (a, b) or not b:
|
||||
return float('nan')
|
||||
return (a or 0) % b
|
||||
|
||||
|
||||
def _js_exp(a, b):
|
||||
if not b:
|
||||
return 1 # even 0 ** 0 !!
|
||||
elif JS_Undefined in (a, b):
|
||||
return float('nan')
|
||||
return (a or 0) ** b
|
||||
|
||||
|
||||
def _js_eq_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
if {a, b} <= {None, JS_Undefined}:
|
||||
return op(a, a)
|
||||
return op(a, b)
|
||||
|
||||
return wrapped
|
||||
|
||||
|
||||
def _js_comp_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
if JS_Undefined in (a, b):
|
||||
return False
|
||||
return op(a or 0, b or 0)
|
||||
|
||||
return wrapped
|
||||
|
||||
|
||||
def _js_ternary(cndn, if_true=True, if_false=False):
|
||||
"""Simulate JS's ternary operator (cndn?if_true:if_false)"""
|
||||
if cndn in (False, None, 0, ''):
|
||||
if cndn in (False, None, 0, '', JS_Undefined):
|
||||
return if_false
|
||||
with contextlib.suppress(TypeError):
|
||||
if math.isnan(cndn): # NB: NaN cannot be checked by membership
|
||||
@ -67,6 +86,50 @@ def _ternary(cndn, if_true=True, if_false=False):
|
||||
return if_true
|
||||
|
||||
|
||||
# Ref: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence
|
||||
_OPERATORS = { # None => Defined in JSInterpreter._operator
|
||||
'?': None,
|
||||
'??': None,
|
||||
'||': None,
|
||||
'&&': None,
|
||||
|
||||
'|': _js_bit_op(operator.or_),
|
||||
'^': _js_bit_op(operator.xor),
|
||||
'&': _js_bit_op(operator.and_),
|
||||
|
||||
'===': operator.is_,
|
||||
'==': _js_eq_op(operator.eq),
|
||||
'!==': operator.is_not,
|
||||
'!=': _js_eq_op(operator.ne),
|
||||
|
||||
'<=': _js_comp_op(operator.le),
|
||||
'>=': _js_comp_op(operator.ge),
|
||||
'<': _js_comp_op(operator.lt),
|
||||
'>': _js_comp_op(operator.gt),
|
||||
|
||||
'>>': _js_bit_op(operator.rshift),
|
||||
'<<': _js_bit_op(operator.lshift),
|
||||
|
||||
'+': _js_arith_op(operator.add),
|
||||
'-': _js_arith_op(operator.sub),
|
||||
|
||||
'*': _js_arith_op(operator.mul),
|
||||
'/': _js_div,
|
||||
'%': _js_mod,
|
||||
'**': _js_exp,
|
||||
}
|
||||
|
||||
_COMP_OPERATORS = {'===', '!==', '==', '!=', '<=', '>=', '<', '>'}
|
||||
|
||||
_NAME_RE = r'[a-zA-Z_$][\w$]*'
|
||||
_MATCHING_PARENS = dict(zip(*zip('()', '{}', '[]')))
|
||||
_QUOTES = '\'"/'
|
||||
|
||||
|
||||
class JS_Undefined:
|
||||
pass
|
||||
|
||||
|
||||
class JS_Break(ExtractorError):
|
||||
def __init__(self):
|
||||
ExtractorError.__init__(self, 'Invalid break')
|
||||
@ -119,6 +182,21 @@ def interpret_statement(self, stmt, local_vars, allow_recursion, *args, **kwargs
|
||||
class JSInterpreter:
|
||||
__named_object_counter = 0
|
||||
|
||||
_RE_FLAGS = {
|
||||
# special knowledge: Python's re flags are bitmask values, current max 128
|
||||
# invent new bitmask values well above that for literal parsing
|
||||
# TODO: new pattern class to execute matches with these flags
|
||||
'd': 1024, # Generate indices for substring matches
|
||||
'g': 2048, # Global search
|
||||
'i': re.I, # Case-insensitive search
|
||||
'm': re.M, # Multi-line search
|
||||
's': re.S, # Allows . to match newline characters
|
||||
'u': re.U, # Treat a pattern as a sequence of unicode code points
|
||||
'y': 4096, # Perform a "sticky" search that matches starting at the current position in the target string
|
||||
}
|
||||
|
||||
_EXC_NAME = '__yt_dlp_exception__'
|
||||
|
||||
def __init__(self, code, objects=None):
|
||||
self.code, self._functions = code, {}
|
||||
self._objects = {} if objects is None else objects
|
||||
@ -135,6 +213,17 @@ def _named_object(self, namespace, obj):
|
||||
namespace[name] = obj
|
||||
return name
|
||||
|
||||
@classmethod
|
||||
def _regex_flags(cls, expr):
|
||||
flags = 0
|
||||
if not expr:
|
||||
return flags, expr
|
||||
for idx, ch in enumerate(expr):
|
||||
if ch not in cls._RE_FLAGS:
|
||||
break
|
||||
flags |= cls._RE_FLAGS[ch]
|
||||
return flags, expr[idx + 1:]
|
||||
|
||||
@staticmethod
|
||||
def _separate(expr, delim=',', max_split=None):
|
||||
OP_CHARS = '+-*/%&|^=<>!,;'
|
||||
@ -178,10 +267,13 @@ def _separate_at_paren(cls, expr, delim):
|
||||
|
||||
def _operator(self, op, left_val, right_expr, expr, local_vars, allow_recursion):
|
||||
if op in ('||', '&&'):
|
||||
if (op == '&&') ^ _ternary(left_val):
|
||||
if (op == '&&') ^ _js_ternary(left_val):
|
||||
return left_val # short circuiting
|
||||
elif op == '??':
|
||||
if left_val not in (None, JS_Undefined):
|
||||
return left_val
|
||||
elif op == '?':
|
||||
right_expr = _ternary(left_val, *self._separate(right_expr, ':', 1))
|
||||
right_expr = _js_ternary(left_val, *self._separate(right_expr, ':', 1))
|
||||
|
||||
right_val = self.interpret_expression(right_expr, local_vars, allow_recursion)
|
||||
if not _OPERATORS.get(op):
|
||||
@ -192,12 +284,14 @@ def _operator(self, op, left_val, right_expr, expr, local_vars, allow_recursion)
|
||||
except Exception as e:
|
||||
raise self.Exception(f'Failed to evaluate {left_val!r} {op} {right_val!r}', expr, cause=e)
|
||||
|
||||
def _index(self, obj, idx):
|
||||
def _index(self, obj, idx, allow_undefined=False):
|
||||
if idx == 'length':
|
||||
return len(obj)
|
||||
try:
|
||||
return obj[int(idx)] if isinstance(obj, list) else obj[idx]
|
||||
except Exception as e:
|
||||
if allow_undefined:
|
||||
return JS_Undefined
|
||||
raise self.Exception(f'Cannot get index {idx}', repr(obj), cause=e)
|
||||
|
||||
def _dump(self, obj, namespace):
|
||||
@ -233,8 +327,8 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
if expr[0] in _QUOTES:
|
||||
inner, outer = self._separate(expr, expr[0], 1)
|
||||
if expr[0] == '/':
|
||||
inner = inner[1:].replace('"', R'\"')
|
||||
inner = re.compile(json.loads(js_to_json(f'"{inner}"', strict=True)))
|
||||
flags, outer = self._regex_flags(outer)
|
||||
inner = re.compile(inner[1:], flags=flags)
|
||||
else:
|
||||
inner = json.loads(js_to_json(f'{inner}{expr[0]}', strict=True))
|
||||
if not outer:
|
||||
@ -259,6 +353,17 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
|
||||
if expr.startswith('{'):
|
||||
inner, outer = self._separate_at_paren(expr, '}')
|
||||
# Look for Map first
|
||||
sub_expressions = [list(self._separate(sub_expr.strip(), ':', 1)) for sub_expr in self._separate(inner)]
|
||||
if all(len(sub_expr) == 2 for sub_expr in sub_expressions):
|
||||
def dict_item(key, val):
|
||||
val = self.interpret_expression(val, local_vars, allow_recursion)
|
||||
if re.match(_NAME_RE, key):
|
||||
return key, val
|
||||
return self.interpret_expression(key, local_vars, allow_recursion), val
|
||||
|
||||
return dict(dict_item(k, v) for k, v in sub_expressions), should_return
|
||||
|
||||
inner, should_abort = self.interpret_statement(inner, local_vars, allow_recursion)
|
||||
if not outer or should_abort:
|
||||
return inner, should_abort or should_return
|
||||
@ -295,17 +400,17 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
if should_abort:
|
||||
return ret, True
|
||||
except JS_Throw as e:
|
||||
local_vars['__ytdlp_exception__'] = e.error
|
||||
local_vars[self._EXC_NAME] = e.error
|
||||
except Exception as e:
|
||||
# XXX: This works for now, but makes debugging future issues very hard
|
||||
local_vars['__ytdlp_exception__'] = e
|
||||
local_vars[self._EXC_NAME] = e
|
||||
ret, should_abort = self.interpret_statement(expr, local_vars, allow_recursion)
|
||||
return ret, should_abort or should_return
|
||||
|
||||
elif m and m.group('catch'):
|
||||
catch_expr, expr = self._separate_at_paren(expr[m.end():], '}')
|
||||
if '__ytdlp_exception__' in local_vars:
|
||||
catch_vars = local_vars.new_child({m.group('err'): local_vars.pop('__ytdlp_exception__')})
|
||||
if self._EXC_NAME in local_vars:
|
||||
catch_vars = local_vars.new_child({m.group('err'): local_vars.pop(self._EXC_NAME)})
|
||||
ret, should_abort = self.interpret_statement(catch_expr, catch_vars, allow_recursion)
|
||||
if should_abort:
|
||||
return ret, True
|
||||
@ -328,7 +433,7 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
start, cndn, increment = self._separate(constructor, ';')
|
||||
self.interpret_expression(start, local_vars, allow_recursion)
|
||||
while True:
|
||||
if not _ternary(self.interpret_expression(cndn, local_vars, allow_recursion)):
|
||||
if not _js_ternary(self.interpret_expression(cndn, local_vars, allow_recursion)):
|
||||
break
|
||||
try:
|
||||
ret, should_abort = self.interpret_statement(body, local_vars, allow_recursion)
|
||||
@ -397,13 +502,13 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
(?P<assign>
|
||||
(?P<out>{_NAME_RE})(?:\[(?P<index>[^\]]+?)\])?\s*
|
||||
(?P<op>{"|".join(map(re.escape, set(_OPERATORS) - _COMP_OPERATORS))})?
|
||||
=(?P<expr>.*)$
|
||||
=(?!=)(?P<expr>.*)$
|
||||
)|(?P<return>
|
||||
(?!if|return|true|false|null|undefined)(?P<name>{_NAME_RE})$
|
||||
)|(?P<indexing>
|
||||
(?P<in>{_NAME_RE})\[(?P<idx>.+)\]$
|
||||
)|(?P<attribute>
|
||||
(?P<var>{_NAME_RE})(?:\.(?P<member>[^(]+)|\[(?P<member2>[^\]]+)\])\s*
|
||||
(?P<var>{_NAME_RE})(?:(?P<nullish>\?)?\.(?P<member>[^(]+)|\[(?P<member2>[^\]]+)\])\s*
|
||||
)|(?P<function>
|
||||
(?P<fname>{_NAME_RE})\((?P<args>.*)\)$
|
||||
)''', expr)
|
||||
@ -414,7 +519,7 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
local_vars[m.group('out')] = self._operator(
|
||||
m.group('op'), left_val, m.group('expr'), expr, local_vars, allow_recursion)
|
||||
return local_vars[m.group('out')], should_return
|
||||
elif left_val is None:
|
||||
elif left_val in (None, JS_Undefined):
|
||||
raise self.Exception(f'Cannot index undefined variable {m.group("out")}', expr)
|
||||
|
||||
idx = self.interpret_expression(m.group('index'), local_vars, allow_recursion)
|
||||
@ -432,9 +537,11 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
raise JS_Break()
|
||||
elif expr == 'continue':
|
||||
raise JS_Continue()
|
||||
elif expr == 'undefined':
|
||||
return JS_Undefined, should_return
|
||||
|
||||
elif m and m.group('return'):
|
||||
return local_vars[m.group('name')], should_return
|
||||
return local_vars.get(m.group('name'), JS_Undefined), should_return
|
||||
|
||||
with contextlib.suppress(ValueError):
|
||||
return json.loads(js_to_json(expr, strict=True)), should_return
|
||||
@ -447,8 +554,11 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
for op in _OPERATORS:
|
||||
separated = list(self._separate(expr, op))
|
||||
right_expr = separated.pop()
|
||||
while op in '<>*-' and len(separated) > 1 and not separated[-1].strip():
|
||||
separated.pop()
|
||||
while True:
|
||||
if op in '?<>*-' and len(separated) > 1 and not separated[-1].strip():
|
||||
separated.pop()
|
||||
elif not (separated and op == '?' and right_expr.startswith('.')):
|
||||
break
|
||||
right_expr = f'{op}{right_expr}'
|
||||
if op != '-':
|
||||
right_expr = f'{separated.pop()}{op}{right_expr}'
|
||||
@ -458,8 +568,7 @@ def interpret_statement(self, stmt, local_vars, allow_recursion=100):
|
||||
return self._operator(op, left_val, right_expr, expr, local_vars, allow_recursion), should_return
|
||||
|
||||
if m and m.group('attribute'):
|
||||
variable = m.group('var')
|
||||
member = m.group('member')
|
||||
variable, member, nullish = m.group('var', 'member', 'nullish')
|
||||
if not member:
|
||||
member = self.interpret_expression(m.group('member2'), local_vars, allow_recursion)
|
||||
arg_str = expr[m.end():]
|
||||
@ -486,12 +595,19 @@ def eval_method():
|
||||
obj = local_vars.get(variable, types.get(variable, NO_DEFAULT))
|
||||
if obj is NO_DEFAULT:
|
||||
if variable not in self._objects:
|
||||
self._objects[variable] = self.extract_object(variable)
|
||||
obj = self._objects[variable]
|
||||
try:
|
||||
self._objects[variable] = self.extract_object(variable)
|
||||
except self.Exception:
|
||||
if not nullish:
|
||||
raise
|
||||
obj = self._objects.get(variable, JS_Undefined)
|
||||
|
||||
if nullish and obj is JS_Undefined:
|
||||
return JS_Undefined
|
||||
|
||||
# Member access
|
||||
if arg_str is None:
|
||||
return self._index(obj, member)
|
||||
return self._index(obj, member, nullish)
|
||||
|
||||
# Function call
|
||||
argvals = [
|
||||
|
||||
Loading…
Reference in New Issue
Block a user