8000 [3.8] bpo-39080: Starred Expression's column offset fix when inside a CALL (GH-17645) by pablogsal · Pull Request #17649 · python/cpython · GitHub
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[3.8] bpo-39080: Starred Expression's column offset fix when inside a CALL (GH-17645) #17649

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Dec 18, 2019
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9 changes: 9 additions & 0 deletions Lib/test/test_ast.py
Original file line number Diff line number Diff line change
Expand Up @@ -209,6 +209,8 @@ def to_tuple(t):
"1 < 2 < 3",
# Call
"f(1,2,c=3,*d,**e)",
# Call with multi-character starred
"f(*[0, 1])",
# Call with a generator argument
"f(a for a in b)",
# Num
Expand Down Expand Up @@ -815,6 +817,12 @@ def test_elif_stmt_start_position_with_else(self):
self.assertEqual(elif_stmt.lineno, 3)
self.assertEqual(elif_stmt.col_offset, 0)

def test_starred_expr_end_position_within_call(self):
node = ast.parse('f(*[0, 1])')
starred_expr = node.body[0].value.args[0]
self.assertEqual(starred_expr.end_lineno, 1)
self.assertEqual(starred_expr.end_col_offset, 9)

def test_literal_eval(self):
self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3])
self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42})
Expand Down Expand Up @@ -1868,6 +1876,7 @@ def main():
('Expression', ('GeneratorExp', (1, 0), ('Tuple', (1, 1), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('List', (1, 11), [('Name', (1, 12), 'a', ('Store',)), ('Name', (1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 20), 'c', ('Load',)), [], 0)])),
('Expression', ('Compare', (1, 0), ('Constant', (1, 0), 1, None), [('Lt',), ('Lt',)], [('Constant', (1, 4), 2, None), ('Constant', (1, 8), 3, None)])),
('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Constant', (1, 2), 1, None), ('Constant', (1, 4), 2, None), ('Starred', (1, 10), ('Name', (1, 11), 'd', ('Load',)), ('Load',))], [('keyword', 'c', ('Constant', (1, 8), 3, None)), ('keyword', None, ('Name', (1, 15), 'e', ('Load',)))])),
('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Starred', (1, 2), ('List', (1, 3), [('Constant', (1, 4), 0, None), ('Constant', (1, 7), 1, None)], ('Load',)), ('Load',))], [])),
('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('GeneratorExp', (1, 1), ('Name', (1, 2), 'a', ('Load',)), [('comprehension', ('Name', (1, 8), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Load',)), [], 0)])], [])),
('Expression', ('Constant', (1, 0), 10, None)),
('Expression', ('Constant', (1, 0), 'string', None)),
Expand Down
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix the value of *end_col_offset* for Starred Expression AST nodes when they are among the elements in the *args* attribute of Call AST nodes.
2 changes: 1 addition & 1 deletion Python/ast.c
Original file line number Diff line number Diff line change
Expand Up @@ -3126,7 +3126,7 @@ ast_for_call(struct compiling *c, const node *n, expr_ty func,
return NULL;
starred = Starred(e, Load, LINENO(chch),
chch->n_col_offset,
chch->n_end_lineno, chch->n_end_col_offset,
e->end_lineno, e->end_col_offset,
c->c_arena);
if (!starred)
return NULL;
Expand Down
0