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[jsinterp] Strip /* comments */ when parsing

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* NB: _separate() is looking creaky
This commit is contained in:
dirkf 2024-12-12 04:21:53 +00:00
parent 60835ca16c
commit f487b4a02a
2 changed files with 27 additions and 3 deletions
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10
test/test_jsinterp.py
View File

@ -160,7 +160,6 @@ class TestJSInterpreter(unittest.TestCase):
self._test('function f(){var x = 20; x += 30 + 1; return x;}', 51)
self._test('function f(){var x = 20; x -= 30 + 1; return x;}', -11)
@unittest.skip('Not yet fully implemented')
def test_comments(self):
self._test('''
function f() {
@ -179,6 +178,15 @@ class TestJSInterpreter(unittest.TestCase):
}
''', 3)
self._test('''
function f() {
var x = ( /* 1 + */ 2 +
/* 30 * 40 */
50);
return x;
}
''', 52)
def test_precedence(self):
self._test('''
function f() {

20
youtube_dl/jsinterp.py
View File

@ -488,9 +488,18 @@ class JSInterpreter(object):
skipping = 0
if skip_delims:
skip_delims = variadic(skip_delims)
skip_txt = None
for idx, char in enumerate(expr):
if skip_txt and idx <= skip_txt[1]:
continue
paren_delta = 0
if not in_quote:
if char == '/' and expr[idx:idx + 2] == '/*':
# skip a comment
skip_txt = expr[idx:].find('*/', 2)
skip_txt = [idx, idx + skip_txt + 1] if skip_txt >= 2 else None
if skip_txt:
continue
if char in _MATCHING_PARENS:
counters[_MATCHING_PARENS[char]] += 1
paren_delta = 1
@ -523,12 +532,19 @@ class JSInterpreter(object):
if pos < delim_len:
pos += 1
continue
yield expr[start: idx - delim_len]
if skip_txt and skip_txt[0] >= start and skip_txt[1] <= idx - delim_len:
yield expr[start:skip_txt[0]] + expr[skip_txt[1] + 1: idx - delim_len]
else:
yield expr[start: idx - delim_len]
skip_txt = None
start, pos = idx + 1, 0
splits += 1
if max_split and splits >= max_split:
break
yield expr[start:]
if skip_txt and skip_txt[0] >= start:
yield expr[start:skip_txt[0]] + expr[skip_txt[1] + 1:]
else:
yield expr[start:]
@classmethod
def _separate_at_paren(cls, expr, delim=None):