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Last change
on this file since d24f17c was d24f17c, checked in by Aleksandar Panovski <apano77@…>, 15 months ago |
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| [d24f17c] | 1 | import { Key } from './Key';
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| 2 | import { List } from '../List/List';
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| 3 | /**
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| 4 | * Get in `O` the type of a field of key `K`
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| 5 | * @param O to extract from
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| 6 | * @param K to extract at
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| 7 | * @returns [[Any]]
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| 8 | * @example
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| 9 | * ```ts
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| 10 | * import {O} from 'ts-toolbelt'
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| 11 | *
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| 12 | * type User = {
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| 13 | * info: {
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| 14 | * name: string
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| 15 | * age: number
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| 16 | * payment: {}
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| 17 | * }
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| 18 | * id: number
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| 19 | * }
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| 20 | *
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| 21 | * type test0 = O.At<User, 'id'> // number
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| 22 | * ```
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| 23 | */
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| 24 | export declare type At<A extends any, K extends Key> = A extends List ? number extends A['length'] ? K extends number | `${number}` ? A[never] | undefined : undefined : K extends keyof A ? A[K] : undefined : unknown extends A ? unknown : K extends keyof A ? A[K] : undefined;
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