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| author | Guido van Rossum <guido@python.org> | 2019-03-07 20:38:08 (GMT) |
|---|---|---|
| committer | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2019-03-07 20:38:08 (GMT) |
| commit | 495da292255b92dd73758fdd0e4c7d27d82b1e57 (patch) | |
| tree | 1378cf049d2d125593fa970ea1e9a9f77604fab1 /Misc | |
| parent | bf94cc7b496a379e1f604aa2e4080bb70ca4020e (diff) | |
| download | cpython-495da292255b92dd73758fdd0e4c7d27d82b1e57.zip cpython-495da292255b92dd73758fdd0e4c7d27d82b1e57.tar.gz cpython-495da292255b92dd73758fdd0e4c7d27d82b1e57.tar.bz2 | |
bpo-35975: Support parsing earlier minor versions of Python 3 (GH-12086)
This adds a `feature_version` flag to `ast.parse()` (documented) and `compile()` (hidden) that allow tweaking the parser to support older versions of the grammar. In particular if `feature_version` is 5 or 6, the hacks for the `async` and `await` keyword from PEP 492 are reinstated. (For 7 or higher, these are unconditionally treated as keywords, but they are still special tokens rather than `NAME` tokens that the parser driver recognizes.)
https://bugs.python.org/issue35975
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2019-02-27-16-49-08.bpo-35975.IescLY.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-02-27-16-49-08.bpo-35975.IescLY.rst b/Misc/NEWS.d/next/Core and Builtins/2019-02-27-16-49-08.bpo-35975.IescLY.rst new file mode 100644 index 0000000..3bbfc74 --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2019-02-27-16-49-08.bpo-35975.IescLY.rst @@ -0,0 +1,7 @@ +Add a ``feature_version`` flag to ``ast.parse()`` (documented) and +``compile()`` (hidden) that allows tweaking the parser to support older +versions of the grammar. In particular, if ``feature_version`` is 5 or 6, +the hacks for the ``async`` and ``await`` keyword from PEP 492 are +reinstated. (For 7 or higher, these are unconditionally treated as keywords, +but they are still special tokens rather than ``NAME`` tokens that the +parser driver recognizes.) |