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bpo-36878: Allow extra text after # type: ignore comments (GH-13238)

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In the parser, when using the type_comments=True option, recognize
a TYPE_IGNORE as anything containing `# type: ignore` followed by
a non-alphanumeric character. This is to allow ignores such as
`# type: ignore[E1000]`.
This commit is contained in:
Michael J. Sullivan 2019-05-11 11:17:24 -07:00 committed by Ivan Levkivskyi
parent 6236c9823e
commit d8320ecb86
3 changed files with 17 additions and 9 deletions
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9
Lib/test/test_type_comments.py
View file

@ -76,6 +76,12 @@ def foo():
def bar():
x = 1 # type: ignore
def baz():
pass # type: ignore[excuse]
pass # type: ignore=excuse
pass # type: ignore [excuse]
x = 1 # type: ignore whatever
"""
# Test for long-form type-comments in arguments. A test function
@ -266,7 +272,7 @@ def test_vardecl(self):
def test_ignores(self):
for tree in self.parse_all(ignores):
self.assertEqual([ti.lineno for ti in tree.type_ignores], [2, 5])
self.assertEqual([ti.lineno for ti in tree.type_ignores], [2, 5, 8, 9, 10, 11])
tree = self.classic_parse(ignores)
self.assertEqual(tree.type_ignores, [])
@ -318,6 +324,7 @@ def check_both_ways(source):
check_both_ways("while True:\n continue # type: int\n")
check_both_ways("try: # type: int\n pass\nfinally:\n pass\n")
check_both_ways("try:\n pass\nfinally: # type: int\n pass\n")
check_both_ways("pass # type: ignorewhatever\n")
def test_func_type_input(self):

4
Misc/NEWS.d/next/Library/2019-05-10-22-00-06.bpo-36878.iigeqk.rst Normal file
View file

@ -0,0 +1,4 @@
When using `type_comments=True` in `ast.parse`, treat `# type: ignore` followed by
a non-alphanumeric character and then arbitrary text as a type ignore, instead of
requiring nothing but whitespace or another comment. This is to permit formations
such as `# type: ignore[E1000]`.

13
Parser/tokenizer.c
View file

@ -1272,14 +1272,11 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
type_start = p;
is_type_ignore = tok->cur >= p + 6 && memcmp(p, "ignore", 6) == 0;
p += 6;
while (is_type_ignore && p < tok->cur) {
if (*p == '#')
break;
is_type_ignore = is_type_ignore && (*p == ' ' || *p == '\t');
p++;
}
/* A TYPE_IGNORE is "type: ignore" followed by the end of the token
* or anything non-alphanumeric. */
is_type_ignore = (
tok->cur >= p + 6 && memcmp(p, "ignore", 6) == 0
&& !(tok->cur > p + 6 && isalnum(p[6])));
if (is_type_ignore) {
/* If this type ignore is the only thing on the line, consume the newline also. */