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author | Guido van Rossum <guido@python.org> | 2001-08-08 05:00:18 +0000 |
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committer | Guido van Rossum <guido@python.org> | 2001-08-08 05:00:18 +0000 |
commit | a87e6ef59e177409e25b09a3d1f25acc6bf0c14f (patch) | |
tree | df74b5a7b92885e46feda829273f0985672da1a6 /Python/future.c | |
parent | cb9ea39487839f95b0d453d22d7302e41373c2a4 (diff) | |
download | cpython-a87e6ef59e177409e25b09a3d1f25acc6bf0c14f.tar.gz |
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.
Diffstat (limited to 'Python/future.c')
-rw-r--r-- | Python/future.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Python/future.c b/Python/future.c index fc0d7482c9..db62b5b251 100644 --- a/Python/future.c +++ b/Python/future.c @@ -33,6 +33,8 @@ future_check_features(PyFutureFeatures *ff, node *n, char *filename) ff->ff_nested_scopes = 1; } else if (strcmp(feature, FUTURE_GENERATORS) == 0) { ff->ff_generators = 1; + } else if (strcmp(feature, FUTURE_DIVISION) == 0) { + ff->ff_division = 1; } else if (strcmp(feature, "braces") == 0) { PyErr_SetString(PyExc_SyntaxError, "not a chance"); @@ -234,6 +236,7 @@ PyNode_Future(node *n, char *filename) ff->ff_last_lineno = -1; ff->ff_nested_scopes = 0; ff->ff_generators = 0; + ff->ff_division = 0; if (future_parse(ff, n, filename) < 0) { PyMem_Free((void *)ff); |