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index.d.ts
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index.d.ts
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/* eslint-disable import/export */
export type UnaryFunction<ValueType, ReturnType> = (
value: ValueType
) => ReturnType | PromiseLike<ReturnType>;
export type Pipeline<ValueType, ReturnType> = (
value?: ValueType
) => Promise<ReturnType>;
/**
Compose promise-returning & async functions into a reusable pipeline.
@param ...input - Iterated over sequentially when returned `function` is called.
@returns The `input` functions are applied from left to right.
@example
```
import pPipe from 'p-pipe';
const addUnicorn = async string => `${string} Unicorn`;
const addRainbow = async string => `${string} Rainbow`;
const pipeline = pPipe(addUnicorn, addRainbow);
console.log(await pipeline('❤️'));
//=> '❤️ Unicorn Rainbow'
```
*/
export default function pPipe<ValueType, ReturnType>(
f1: UnaryFunction<ValueType, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<ValueType, ResultValue1, ReturnType>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<ValueType, ResultValue1, ResultValue2, ReturnType>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<
ValueType,
ResultValue1,
ResultValue2,
ResultValue3,
ReturnType
>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ResultValue3>,
f4: UnaryFunction<ResultValue3, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<
ValueType,
ResultValue1,
ResultValue2,
ResultValue3,
ResultValue4,
ReturnType
>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ResultValue3>,
f4: UnaryFunction<ResultValue3, ResultValue4>,
f5: UnaryFunction<ResultValue4, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<
ValueType,
ResultValue1,
ResultValue2,
ResultValue3,
ResultValue4,
ResultValue5,
ReturnType
>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ResultValue3>,
f4: UnaryFunction<ResultValue3, ResultValue4>,
f5: UnaryFunction<ResultValue4, ResultValue5>,
f6: UnaryFunction<ResultValue5, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<
ValueType,
ResultValue1,
ResultValue2,
ResultValue3,
ResultValue4,
ResultValue5,
ResultValue6,
ReturnType
>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ResultValue3>,
f4: UnaryFunction<ResultValue3, ResultValue4>,
f5: UnaryFunction<ResultValue4, ResultValue5>,
f6: UnaryFunction<ResultValue5, ResultValue6>,
f7: UnaryFunction<ResultValue6, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<
ValueType,
ResultValue1,
ResultValue2,
ResultValue3,
ResultValue4,
ResultValue5,
ResultValue6,
ResultValue7,
ReturnType
>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ResultValue3>,
f4: UnaryFunction<ResultValue3, ResultValue4>,
f5: UnaryFunction<ResultValue4, ResultValue5>,
f6: UnaryFunction<ResultValue5, ResultValue6>,
f7: UnaryFunction<ResultValue6, ResultValue7>,
f8: UnaryFunction<ResultValue7, ReturnType>
): Pipeline<ValueType, ReturnType>;
export default function pPipe<
ValueType,
ResultValue1,
ResultValue2,
ResultValue3,
ResultValue4,
ResultValue5,
ResultValue6,
ResultValue7,
ResultValue8,
ReturnType
>(
f1: UnaryFunction<ValueType, ResultValue1>,
f2: UnaryFunction<ResultValue1, ResultValue2>,
f3: UnaryFunction<ResultValue2, ResultValue3>,
f4: UnaryFunction<ResultValue3, ResultValue4>,
f5: UnaryFunction<ResultValue4, ResultValue5>,
f6: UnaryFunction<ResultValue5, ResultValue6>,
f7: UnaryFunction<ResultValue6, ResultValue7>,
f8: UnaryFunction<ResultValue7, ResultValue8>,
f9: UnaryFunction<ResultValue8, ReturnType>
): Pipeline<ValueType, ReturnType>;
// Fallbacks if more than 9 functions are passed as input (not type-safe).
export default function pPipe(
...functions: Array<UnaryFunction<any, unknown>>
): Pipeline<unknown, unknown>;