55 lines
2.2 KiB
TypeScript
55 lines
2.2 KiB
TypeScript
type TypeGuard<A, B extends A> = (payload: A) => payload is B;
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/**
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* A factory function that creates a function to check if the payload is one of the given types.
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*
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* @example
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* import { isOneOf, isNull, isUndefined } from 'is-what'
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*
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* const isNullOrUndefined = isOneOf(isNull, isUndefined)
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*
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* isNullOrUndefined(null) // true
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* isNullOrUndefined(undefined) // true
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* isNullOrUndefined(123) // false
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*/
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export declare function isOneOf<A, B extends A, C extends A>(a: TypeGuard<A, B>, b: TypeGuard<A, C>): TypeGuard<A, B | C>;
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/**
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* A factory function that creates a function to check if the payload is one of the given types.
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*
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* @example
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* import { isOneOf, isNull, isUndefined } from 'is-what'
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*
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* const isNullOrUndefined = isOneOf(isNull, isUndefined)
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*
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* isNullOrUndefined(null) // true
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* isNullOrUndefined(undefined) // true
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* isNullOrUndefined(123) // false
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*/
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export declare function isOneOf<A, B extends A, C extends A, D extends A>(a: TypeGuard<A, B>, b: TypeGuard<A, C>, c: TypeGuard<A, D>): TypeGuard<A, B | C | D>;
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/**
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* A factory function that creates a function to check if the payload is one of the given types.
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*
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* @example
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* import { isOneOf, isNull, isUndefined } from 'is-what'
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*
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* const isNullOrUndefined = isOneOf(isNull, isUndefined)
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*
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* isNullOrUndefined(null) // true
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* isNullOrUndefined(undefined) // true
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* isNullOrUndefined(123) // false
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*/
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export declare function isOneOf<A, B extends A, C extends A, D extends A, E extends A>(a: TypeGuard<A, B>, b: TypeGuard<A, C>, c: TypeGuard<A, D>, d: TypeGuard<A, E>): TypeGuard<A, B | C | D | E>;
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/**
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* A factory function that creates a function to check if the payload is one of the given types.
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*
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* @example
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* import { isOneOf, isNull, isUndefined } from 'is-what'
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*
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* const isNullOrUndefined = isOneOf(isNull, isUndefined)
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*
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* isNullOrUndefined(null) // true
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* isNullOrUndefined(undefined) // true
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* isNullOrUndefined(123) // false
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*/
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export declare function isOneOf<A, B extends A, C extends A, D extends A, E extends A, F extends A>(a: TypeGuard<A, B>, b: TypeGuard<A, C>, c: TypeGuard<A, D>, d: TypeGuard<A, E>, e: TypeGuard<A, F>): TypeGuard<A, B | C | D | E | F>;
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export {};
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