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Update declaration of ts.Iterator to be compatible with ES2015 IteratorResult type #31214
Description
TypeScript Version: 3.5.0-dev.20190502
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Code
I'm trying to use the API changes of #31101, but I run into assignability issues.
import * as ts from 'typescript';
return ts.getParsedCommandLineOfConfigFile('foo', {}, undefined!, new Map<string, ts.ExtendedConfigCacheEntry>());Expected behavior:
No type error.
Actual behavior:
Argument of type 'Map<string, ExtendedConfigCacheEntry>' is not assignable to parameter of type 'Map<ExtendedConfigCacheEntry>'.
Types of property 'keys' are incompatible.
Type '() => IterableIterator<string>' is not assignable to type '() => Iterator<string>'.
Type 'IterableIterator<string>' is not assignable to type 'Iterator<string>'.
Types of property 'next' are incompatible.
Type '(value?: any) => IteratorResult<string>' is not assignable to type '() => { value: never; done: true; } | { value: string; done: false; }'.
Type 'IteratorResult<string>' is not assignable to type '{ value: never; done: true; } | { value: string; done: false; }'.
Type 'IteratorResult<string>' is not assignable to type '{ value: string; done: false; }'.
Types of property 'done' are incompatible.
Type 'boolean' is not assignable to type 'false'.
Activity
rbuckton commentedon May 9, 2019
This isn't an issue with lib.d.ts, but our own definition in
src/compiler/core.ts. This should be fixed when #30790 is merged.ajafff commentedon Aug 4, 2019
Ron Buckton (@rbuckton) this issue still exists with the latest nightly release. The error message is still the same. Can you please reopen this issue?