Mercurial > cpython-lru_cache-weakref
diff Objects/floatobject.c @ 19051:f20727cc3d0f legacy-trunk
Implement PEP 238 in its (almost) full glory.
This introduces:
- A new operator // that means floor division (the kind of division
where 1/2 is 0).
- The "future division" statement ("from __future__ import division)
which changes the meaning of the / operator to implement "true
division" (where 1/2 is 0.5).
- New overloadable operators __truediv__ and __floordiv__.
- New slots in the PyNumberMethods struct for true and floor division,
new abstract APIs for them, new opcodes, and so on.
I emphasize that without the future division statement, the semantics
of / will remain unchanged until Python 3.0.
Not yet implemented are warnings (default off) when / is used with int
or long arguments.
This has been on display since 7/31 as SF patch #443474.
Flames to /dev/null.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Wed, 08 Aug 2001 05:00:18 +0000 |
| parents | 09df3254b49d |
| children | 7257e87e0720 |
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--- a/Objects/floatobject.c Wed Aug 08 01:30:38 2001 +0000 +++ b/Objects/floatobject.c Wed Aug 08 05:00:18 2001 +0000 @@ -558,6 +558,21 @@ } static PyObject * +float_int_div(PyObject *v, PyObject *w) +{ + PyObject *t, *r; + + t = float_divmod(v, w); + if (t != NULL) { + r = PyTuple_GET_ITEM(t, 0); + Py_INCREF(r); + Py_DECREF(t); + return r; + } + return NULL; +} + +static PyObject * float_neg(PyFloatObject *v) { return PyFloat_FromDouble(-v->ob_fval); @@ -678,19 +693,23 @@ (unaryfunc)float_int, /*nb_int*/ (unaryfunc)float_long, /*nb_long*/ (unaryfunc)float_float, /*nb_float*/ - 0, /*nb_oct*/ - 0, /*nb_hex*/ - 0, /*nb_inplace_add*/ - 0, /*nb_inplace_subtract*/ - 0, /*nb_inplace_multiply*/ - 0, /*nb_inplace_divide*/ - 0, /*nb_inplace_remainder*/ - 0, /*nb_inplace_power*/ - 0, /*nb_inplace_lshift*/ - 0, /*nb_inplace_rshift*/ - 0, /*nb_inplace_and*/ - 0, /*nb_inplace_xor*/ - 0, /*nb_inplace_or*/ + 0, /* nb_oct */ + 0, /* nb_hex */ + 0, /* nb_inplace_add */ + 0, /* nb_inplace_subtract */ + 0, /* nb_inplace_multiply */ + 0, /* nb_inplace_divide */ + 0, /* nb_inplace_remainder */ + 0, /* nb_inplace_power */ + 0, /* nb_inplace_lshift */ + 0, /* nb_inplace_rshift */ + 0, /* nb_inplace_and */ + 0, /* nb_inplace_xor */ + 0, /* nb_inplace_or */ + float_int_div, /* nb_floor_divide */ + float_div, /* nb_true_divide */ + 0, /* nb_inplace_floor_divide */ + 0, /* nb_inplace_true_divide */ }; PyTypeObject PyFloat_Type = {