mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 08:59:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

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

Browse source 
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>
This commit is contained in:
John Belmonte 2022-04-11 23:34:18 +09:00 • committed by GitHub
parent dd207a6ac5
commit b0b836b20c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
16 changed files with 368 additions and 43 deletions
Download patch file Download diff file Expand all files Collapse all files

11
Objects/bytesobject.c
View file

@ -415,6 +415,7 @@ formatfloat(PyObject *v, int flags, int prec, int type,
PyObject *result;
double x;
size_t len;
int dtoa_flags = 0;
x = PyFloat_AsDouble(v);
if (x == -1.0 && PyErr_Occurred()) {
@ -426,8 +427,13 @@ formatfloat(PyObject *v, int flags, int prec, int type,
if (prec < 0)
prec = 6;
p = PyOS_double_to_string(x, type, prec,
(flags & F_ALT) ? Py_DTSF_ALT : 0, NULL);
if (flags & F_ALT) {
dtoa_flags |= Py_DTSF_ALT;
}
if (flags & F_NO_NEG_0) {
dtoa_flags |= Py_DTSF_NO_NEG_0;
}
p = PyOS_double_to_string(x, type, prec, dtoa_flags, NULL);
if (p == NULL)
return NULL;
@ -706,6 +712,7 @@ _PyBytes_FormatEx(const char *format, Py_ssize_t format_len,
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;
}