Ivan Levkivskyi | b692dc8 | 2017-02-13 22:50:14 +0100 | [diff] [blame] | 1 | """Module for testing the behavior of generics across different modules.""" |
| 2 | |
Łukasz Langa | f350a26 | 2017-09-14 14:33:00 -0400 | [diff] [blame] | 3 | import sys |
| 4 | from textwrap import dedent |
| 5 | from typing import TypeVar, Generic, Optional |
Ivan Levkivskyi | b692dc8 | 2017-02-13 22:50:14 +0100 | [diff] [blame] | 6 | |
| 7 | |
Łukasz Langa | f350a26 | 2017-09-14 14:33:00 -0400 | [diff] [blame] | 8 | if sys.version_info[:2] >= (3, 6): |
| 9 | exec(dedent(""" |
| 10 | default_a: Optional['A'] = None |
| 11 | default_b: Optional['B'] = None |
| 12 | |
| 13 | T = TypeVar('T') |
Ivan Levkivskyi | b692dc8 | 2017-02-13 22:50:14 +0100 | [diff] [blame] | 14 | |
| 15 | |
Ivan Levkivskyi | b692dc8 | 2017-02-13 22:50:14 +0100 | [diff] [blame] | 16 | class A(Generic[T]): |
Łukasz Langa | f350a26 | 2017-09-14 14:33:00 -0400 | [diff] [blame] | 17 | some_b: 'B' |
| 18 | |
| 19 | |
| 20 | class B(Generic[T]): |
| 21 | class A(Generic[T]): |
| 22 | pass |
| 23 | |
| 24 | my_inner_a1: 'B.A' |
| 25 | my_inner_a2: A |
| 26 | my_outer_a: 'A' # unless somebody calls get_type_hints with localns=B.__dict__ |
| 27 | """)) |
| 28 | else: # This should stay in sync with the syntax above. |
| 29 | __annotations__ = dict( |
| 30 | default_a=Optional['A'], |
| 31 | default_b=Optional['B'], |
| 32 | ) |
| 33 | default_a = None |
| 34 | default_b = None |
| 35 | |
| 36 | T = TypeVar('T') |
| 37 | |
| 38 | |
| 39 | class A(Generic[T]): |
| 40 | __annotations__ = dict( |
| 41 | some_b='B' |
| 42 | ) |
| 43 | |
| 44 | |
| 45 | class B(Generic[T]): |
| 46 | class A(Generic[T]): |
| 47 | pass |
| 48 | |
| 49 | __annotations__ = dict( |
| 50 | my_inner_a1='B.A', |
| 51 | my_inner_a2=A, |
| 52 | my_outer_a='A' # unless somebody calls get_type_hints with localns=B.__dict__ |
| 53 | ) |