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bpo-45995: add "z" format specifer to coerce negative 0 to zero (GH-30049)

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Add "z" format specifier to coerce negative 0 to zero.

See https://github.com/python/cpython/issues/90153 (originally https://bugs.python.org/issue45995) for discussion.
This covers `str.format()` and f-strings.  Old-style string interpolation is not supported.

Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
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John Belmonte 2022-04-11 23:34:18 +09:00 • committed by GitHub
parent dd207a6ac5
commit b0b836b20c
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16 changed files with 368 additions and 43 deletions
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Python/ast_opt.c
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@ -310,6 +310,7 @@ simple_format_arg_parse(PyObject *fmt, Py_ssize_t *ppos,
case ' ': *flags |= F_BLANK; continue;
case '#': *flags |= F_ALT; continue;
case '0': *flags |= F_ZERO; continue;
case 'z': *flags |= F_NO_NEG_0; continue;
}
break;
}