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feat(typescript-types): Fully rewrite KeyPaths<T,O,F>

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Again to solve 'Too deep instantiation', but this time using tail
recursion optimization on conditions.
This commit is contained in:
T. R. Bernstein
2025-07-28 22:30:48 +02:00
parent 9170f6856a
commit eba47b51bd
2 changed files with 28 additions and 8 deletions
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6
packages/typescript-types/test/key-paths.tst.ts
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@@ -70,8 +70,9 @@ type KeysWithLeavesOnlyDisabled =
| 'arrayKey.0.age'
| 'arrayKey.1'
// type T = any extends never ? true : false
// type A = KeyPaths<ExampleObject, { invertFilter: true }>
type KeysWithStringValuesOnly = 'simplevalue' | 'objectKey.name' | 'arrayKey.0.name'
// type A = KeyPaths<ExampleObject, { invertFilter: true }, string>
expect<KeyPaths<ExampleObject>>().type.toBe<KeysWithDefaultSettings>()
expect<KeyPaths<ExampleObject, { invertFilter: true }>>().type.toBe<KeysWithInvertFilterSettings>()
expect<KeyPaths<ExampleObject, { separator: '-' }>>().type.toBe<KeysWithSpecialSeparator>()
@@ -82,3 +83,4 @@ expect<KeyPaths<ExampleObject, {}, any>>().type.toBeAssignableWith<never>()
expect<KeyPaths<ExampleObject, { invertFilter: true }, never>>().type.toBeAssignableWith<never>()
expect<KeyPaths<ExampleObject, { invertFilter: true }, any>>().type.toBe<KeysWhenFilterIsSetToNever>()
expect<KeyPaths<ExampleObject, { invertFilter: true }, string>>().type.toBe<KeysWithStringValuesOnly>()