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gh-122300: Preserve AST nodes for format specifiers with single elements (#122308)

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Pablo Galindo Salgado 2024-07-26 17:29:41 +01:00 committed by GitHub
parent 7c2921844f
commit db2d8b6db1
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4 changed files with 8 additions and 3 deletions
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4
Doc/library/ast.rst
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@ -316,7 +316,9 @@ Literals
args=[
Name(id='a', ctx=Load())]),
conversion=-1,
format_spec=Constant(value='.3'))]))
format_spec=JoinedStr(
values=[
Constant(value='.3')]))]))
.. class:: List(elts, ctx)

2
Lib/test/test_ast.py
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@ -3638,7 +3638,7 @@ eval_results = [
('Expression', ('Subscript', (1, 0, 1, 10), ('List', (1, 0, 1, 3), [('Constant', (1, 1, 1, 2), 5, None)], ('Load',)), ('Slice', (1, 4, 1, 9), ('Constant', (1, 4, 1, 5), 1, None), ('Constant', (1, 6, 1, 7), 1, None), ('Constant', (1, 8, 1, 9), 1, None)), ('Load',))),
('Expression', ('IfExp', (1, 0, 1, 21), ('Name', (1, 9, 1, 10), 'x', ('Load',)), ('Call', (1, 0, 1, 5), ('Name', (1, 0, 1, 3), 'foo', ('Load',)), [], []), ('Call', (1, 16, 1, 21), ('Name', (1, 16, 1, 19), 'bar', ('Load',)), [], []))),
('Expression', ('JoinedStr', (1, 0, 1, 6), [('FormattedValue', (1, 2, 1, 5), ('Name', (1, 3, 1, 4), 'a', ('Load',)), -1, None)])),
('Expression', ('JoinedStr', (1, 0, 1, 10), [('FormattedValue', (1, 2, 1, 9), ('Name', (1, 3, 1, 4), 'a', ('Load',)), -1, ('Constant', (1, 5, 1, 8), '.2f', None))])),
('Expression', ('JoinedStr', (1, 0, 1, 10), [('FormattedValue', (1, 2, 1, 9), ('Name', (1, 3, 1, 4), 'a', ('Load',)), -1, ('JoinedStr', (1, 4, 1, 8), [('Constant', (1, 5, 1, 8), '.2f', None)]))])),
('Expression', ('JoinedStr', (1, 0, 1, 8), [('FormattedValue', (1, 2, 1, 7), ('Name', (1, 3, 1, 4), 'a', ('Load',)), 114, None)])),
('Expression', ('JoinedStr', (1, 0, 1, 11), [('Constant', (1, 2, 1, 6), 'foo(', None), ('FormattedValue', (1, 6, 1, 9), ('Name', (1, 7, 1, 8), 'a', ('Load',)), -1, None), ('Constant', (1, 9, 1, 10), ')', None)])),
]

2
Misc/NEWS.d/next/Core and Builtins/2024-07-26-14-05-51.gh-issue-122300.SVIF-l.rst Normal file
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@ -0,0 +1,2 @@
Preserve AST nodes for f-string with single-element format specifiers. Patch
by Pablo Galindo

3
Parser/action_helpers.c
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@ -1010,7 +1010,8 @@ _PyPegen_setup_full_format_spec(Parser *p, Token *colon, asdl_expr_seq *spec, in
spec = resized_spec;
}
expr_ty res;
if (asdl_seq_LEN(spec) == 0) {
Py_ssize_t n = asdl_seq_LEN(spec);
if (n == 0 || (n == 1 && asdl_seq_GET(spec, 0)->kind == Constant_kind)) {
res = _PyAST_JoinedStr(spec, lineno, col_offset, end_lineno,
end_col_offset, p->arena);
} else {