typedash/dist/createTypeGuard/index.cjs.map

modern, type-safe collection of utility functions

{"version":3,"sources":["../../src/functions/createTypeGuard/createTypeGuard.ts"],"names":[],"mappings":";AAeO,SAAS,gBAId,QAAyE;AACzE,QAAM,YAAY,IAAI,IAAa,MAAM;AACzC,SAAO,SAAS,UAAU,GAAuC;AAC/D,WAAO,UAAU,IAAI,CAAC;AAAA,EACxB;AACF","sourcesContent":["/**\n * Creates a type guard that checks if the given type is assignable to the given type.\n * @param values The values to check against.\n * @template {TInput} The type to check against, `unknown` by default. Pass in if you want to have a narrowed type for the type predicate (e.g. `string`).\n * @returns A type guard that checks if the given type is assignable to the given type.\n * @example\n * ```ts\n * const isValidValue = createTypeGuard(['foo', 'bar']);\n *\n * const value: unknown = '...';\n * if (isValidValue(value)) {\n *   // ✅ value is of type `'foo' | 'bar'`\n * }\n * ```\n */\nexport function createTypeGuard<\n  const TKnownValue,\n  // eslint-disable-next-line @typescript-eslint/no-redundant-type-constituents -- without this we can't have a default type of `unknown`\n  TInput extends TKnownValue | unknown = unknown,\n>(values: Iterable<TKnownValue>): (v: TInput) => v is TInput & TKnownValue {\n  const setValues = new Set<unknown>(values);\n  return function predicate(v: unknown): v is TInput & TKnownValue {\n    return setValues.has(v);\n  };\n}\n"]}