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json-expression-eval

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json serializable rule engine / boolean expression evaluator

7 lines (6 loc) 316 B
import { Union, Misc } from 'ts-toolbelt'; type _NonNullable<O, Ignore> = { [K in keyof O]-?: O[K] extends Misc.BuiltIn | Ignore ? O[K] : _NonNullable<Union.NonNullable<O[K]>, Ignore>; }; export type NonNullable<O extends object, Ignore = never> = O extends unknown ? _NonNullable<O, Ignore> : never; export {};