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sleexyz/flowbug.js

Created July 9, 2017 18:36
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callable classes cannot be extended
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flowbug.js
/* @flow */
declare class Callable<A, B> {
(A): B
}
class WithFoo<A, B> extends Callable<A, B> {
foo() {
}
}
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sleexyz commented Jul 9, 2017 •
edited
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flow v0.49.1:

7: class WithFoo<A, B> extends Callable<A, B> {
         ^ property `foo`. Property not found in
. Object

https://flow.org/try/#0PQKgBAAgZgNg9gdzCYAoVATApgYxgQwCcsw98BncsAYXxgICMYsAeAQQBowAhAPjADeqMGAAUbAJQAuHqgC+6MpTAB1AJYAXABYAxOHHZc+YLAA8NWAHYYqteviatOPfkJFR9oiYOFgFcoA

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