diff options
Diffstat (limited to 'Python/compile.c')
| -rw-r--r-- | Python/compile.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/Python/compile.c b/Python/compile.c index ce19aa9..0e824ca 100644 --- a/Python/compile.c +++ b/Python/compile.c @@ -1567,7 +1567,20 @@ compiler_add_o(struct compiler *c, PyObject *dict, PyObject *o) Py_ssize_t arg; /* necessary to make sure types aren't coerced (e.g., int and long) */ - t = PyTuple_Pack(2, o, o->ob_type); + /* _and_ to distinguish 0.0 from -0.0 e.g. on IEEE platforms */ + if (PyFloat_Check(o)) { + double d = PyFloat_AS_DOUBLE(o); + unsigned char* p = (unsigned char*) &d; + /* all we need is to make the tuple different in either the 0.0 + * or -0.0 case from all others, just to avoid the "coercion". + */ + if (*p==0 && p[sizeof(double)-1]==0) + t = PyTuple_Pack(3, o, o->ob_type, Py_None); + else + t = PyTuple_Pack(2, o, o->ob_type); + } else { + t = PyTuple_Pack(2, o, o->ob_type); + } if (t == NULL) return -1; |