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Expose the CO_xxx flags via the "new" module (re-solving a problem "the

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right way").  Fiddle __future__.py to use them.

Jeremy's pyassem.py may also want to use them (by-hand duplication of
magic numbers is brittle), but leaving that to his judgment.

Beef up __future__'s test to verify the exported feature names appear
correct.
This commit is contained in:
Tim Peters 2001-08-18 20:18:49 +00:00
parent 95618b5bc9
commit aa32070f4d
3 changed files with 48 additions and 13 deletions
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15
Lib/__future__.py
View File

@ -55,14 +55,7 @@ all_feature_names = [
__all__ = ["all_feature_names"] + all_feature_names
# The CO_xxx symbols are defined here under the same names used by
# compile.h, so that an editor search will find them here. However,
# they're not exported in __all__, because they don't really belong to
# this module.
CO_NESTED = 0x0010 # nested_scopes
CO_GENERATOR_ALLOWED = 0x1000 # generators
CO_FUTURE_DIVISION = 0x2000 # division
import new as _new # for CO_xxx symbols
class _Feature:
def __init__(self, optionalRelease, mandatoryRelease, compiler_flag):
@ -93,12 +86,12 @@ class _Feature:
nested_scopes = _Feature((2, 1, 0, "beta", 1),
(2, 2, 0, "alpha", 0),
CO_NESTED)
_new.CO_NESTED)
generators = _Feature((2, 2, 0, "alpha", 1),
(2, 3, 0, "final", 0),
CO_GENERATOR_ALLOWED)
_new.CO_GENERATOR_ALLOWED)
division = _Feature((2, 2, 0, "alpha", 2),
(3, 0, 0, "alpha", 0),
CO_FUTURE_DIVISION)
_new.CO_FUTURE_DIVISION)

13
Lib/test/test___future__.py
View File

@ -6,6 +6,19 @@ import __future__
GOOD_SERIALS = ("alpha", "beta", "candidate", "final")
features = __future__.all_feature_names
# Verify that all_feature_names appears correct.
given_feature_names = features[:]
for name in dir(__future__):
obj = getattr(__future__, name, None)
if obj is not None and isinstance(obj, __future__._Feature):
verify(name in given_feature_names,
"%r should have been in all_feature_names" % name)
given_feature_names.remove(name)
verify(len(given_feature_names) == 0,
"all_feature_names has too much: %r" % given_feature_names)
del given_feature_names
for feature in features:
value = getattr(__future__, feature)
if verbose:

33
Modules/newmodule.c
View File

@ -220,9 +220,38 @@ char new_doc[] =
\n\
You need to know a great deal about the interpreter to use this!";
static void
insertint(PyObject *d, char *name, int value)
{
PyObject *v = PyInt_FromLong((long) value);
if (v == NULL) {
/* Don't bother reporting this error */
PyErr_Clear();
}
else {
PyDict_SetItemString(d, name, v);
Py_DECREF(v);
}
}
DL_EXPORT(void)
initnew(void)
{
Py_InitModule4("new", new_methods, new_doc, (PyObject *)NULL,
PYTHON_API_VERSION);
PyObject *m;
PyObject *d;
m = Py_InitModule4("new", new_methods, new_doc, (PyObject *)NULL,
PYTHON_API_VERSION);
d = PyModule_GetDict(m);
#define ADDSYM(TOKEN) insertint(d, #TOKEN, TOKEN)
ADDSYM(CO_OPTIMIZED);
ADDSYM(CO_NEWLOCALS);
ADDSYM(CO_VARARGS);
ADDSYM(CO_VARKEYWORDS);
ADDSYM(CO_NESTED);
ADDSYM(CO_GENERATOR);
ADDSYM(CO_GENERATOR_ALLOWED);
ADDSYM(CO_FUTURE_DIVISION);
#undef ADDSYM
}