Ensure static index signatures have an errorNode available #44129
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typescript-bot
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Author: Team
For Milestone Bug
src/compiler/checker.ts
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| @@ -36898,6 +36898,11 @@ namespace ts { | |||
| const someBaseTypeHasBothIndexers = forEach(getBaseTypes(<InterfaceType>type), base => getIndexTypeOfType(base, IndexKind.String) && getIndexTypeOfType(base, IndexKind.Number)); | |||
| errorNode = someBaseTypeHasBothIndexers || !type.symbol.declarations ? undefined : type.symbol.declarations[0]; | |||
| } | |||
| if (!errorNode) { | |||
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Seems like this isn't the right fix - you'll still end up with the wrong error span, just as in the following example:
class Foo {
[p: string]: any;
static [p: string]: number;
}error: Property 'prototype' of type 'Foo' is not assignable to string index type 'number'.
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I've opened up #44134 to track that.
… stop checking prototype props
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@DanielRosenwasser This now fixes both reporting issues and, per our discussion to mitigate the impact of that and preserve the usefulness of the feature, also disables checking if index signatures are consistent with prototype properties on class static sides. |
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@DanielRosenwasser you want a cherry pick for this, I assume? @typescript-bot cherry-pick this into release-4.3 |
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Heya @weswigham, I've started to run the task to cherry-pick this into |
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Hey @weswigham, I've opened #44240 for you. |
Component commits: 7a9854c Ensure static index signatures have an errorNode available 626b431 Merge branch 'master' into error-node-static-index-signatures a8327a0 Lookup static index signature declarations in the right symbol table, stop checking prototype props Co-authored-by: Wesley Wigham <t-weswig@microsoft.com>
So they can actually report the compatibility error they were trying to issue when the string and number index signatures mismatched.
Fixes #44082
Fixes #44134