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| author | Guido van Rossum <guido@python.org> | 2019-03-07 12:38:08 -0800 |
|---|---|---|
| committer | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2019-03-07 12:38:08 -0800 |
| commit | 495da292255b92dd73758fdd0e4c7d27d82b1e57 (patch) | |
| tree | 1378cf049d2d125593fa970ea1e9a9f77604fab1 /Modules/parsermodule.c | |
| parent | bf94cc7b496a379e1f604aa2e4080bb70ca4020e (diff) | |
| download | cpython-git-495da292255b92dd73758fdd0e4c7d27d82b1e57.tar.gz | |
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 'Modules/parsermodule.c')
| -rw-r--r-- | Modules/parsermodule.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Modules/parsermodule.c b/Modules/parsermodule.c index 87f58d340c..d4e2be643e 100644 --- a/Modules/parsermodule.c +++ b/Modules/parsermodule.c @@ -341,6 +341,7 @@ parser_newstobject(node *st, int type) o->st_node = st; o->st_type = type; o->st_flags.cf_flags = 0; + o->st_flags.cf_feature_version = PY_MINOR_VERSION; } else { PyNode_Free(st); @@ -584,8 +585,10 @@ parser_do_parse(PyObject *args, PyObject *kw, const char *argspec, int type) if (n) { res = parser_newstobject(n, type); - if (res) + if (res) { ((PyST_Object *)res)->st_flags.cf_flags = flags & PyCF_MASK; + ((PyST_Object *)res)->st_flags.cf_feature_version = PY_MINOR_VERSION; + } } else { PyParser_SetError(&err); |