String annotations [PEP 563] (#4390)
* Document `from __future__ import annotations`
* Provide plumbing and tests for `from __future__ import annotations`
* Implement unparsing the AST back to string form
This is required for PEP 563 and as such only implements a part of the
unparsing process that covers expressions.
diff --git a/Python/future.c b/Python/future.c
index 5cb21ac..53faa6b 100644
--- a/Python/future.c
+++ b/Python/future.c
@@ -42,6 +42,8 @@
ff->ff_features |= CO_FUTURE_BARRY_AS_BDFL;
} else if (strcmp(feature, FUTURE_GENERATOR_STOP) == 0) {
ff->ff_features |= CO_FUTURE_GENERATOR_STOP;
+ } else if (strcmp(feature, FUTURE_ANNOTATIONS) == 0) {
+ ff->ff_features |= CO_FUTURE_ANNOTATIONS;
} else if (strcmp(feature, "braces") == 0) {
PyErr_SetString(PyExc_SyntaxError,
"not a chance");