Files
test-repo/tests/flow/class_fields/generic_class.js
T
Simon Lydell dc93bdc983 Sync the Flow tests (#1163)
* Extract custom tests from tests/flow/

Approach:

1. Remove all .js files in tests/flow except .snap.js files.
2. Copy over all .js files from tests/ in the flow repo.
3. Go through the diff looking for deletions.
   - It was easy to see which deletions were due to changes in the tests
     due to updates in the flow repo.
   - For the rest of the deletions, I used `git blame` to verify that
     they had been added by us since the flow tests were copied over.

This makes tests/flow/ simply a copy of the tests from the flow repo,
making it easier to sync with the upstream flow tests in the future.

* Add a script for syncing the flow tests

* Sync the flow tests
2017-04-08 07:52:38 -07:00

32 lines
722 B
JavaScript

// @flow
/**
* Fields annotated with a generic should assume a type once the type param
* is instantiated.
*/
class ClassAnnotated<T> {
p: T;
static p: T;
}
var o1 = new ClassAnnotated();
o1.p = 42;
(o1.p: number);
(o1.p: string); // Error: number ~> string
ClassAnnotated.p = 42;
(ClassAnnotated.p: number);
(ClassAnnotated.p: string); // Error: number ~> string
/**
* It's always an error to initialized a generically-typed field with an
* expression of any type other than the generic itself.
*/
class ClassGenericInitialized<T, U> {
invalid: T = 42; // Error: number ~> Generic<T>
valid: T = ((42:any):T);
static invalid: T = 42; // Error: number ~> Generic<T>
static valid: T = ((42:any):T);
}