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- {"version":3,"file":"asyncify-helpers.js","sourceRoot":"","sources":["../ts/asyncify-helpers.ts"],"names":[],"mappings":";;;AAAA,QAAQ,CAAC,CAAC,UAAU,CAAI,KAAqB;IAC3C,OAAO,CAAC,MAAM,KAAK,CAAM,CAAA;AAC3B,CAAC;AAED,SAAS,YAAY,CACnB,SAA4D;IAE5D,OAAO,UAAU,CAAC,uBAAuB,CAAC,SAAS,CAAC,CAAC,CAAA;AACvD,CAAC;AAMD,MAAM,UAAU,GAAe,UAAwB,CAAA;AACvD,UAAU,CAAC,EAAE,GAAG,YAAY,CAAA;AAE5B;;;;;;;GAOG;AACH,SAAgB,YAAY,CAS1B,IAAU,EACV,EAI2D;IAE3D,OAAO,CAAC,GAAG,IAAU,EAAE,EAAE;QACvB,MAAM,SAAS,GAAG,EAAE,CAAC,IAAI,CAAC,IAAI,EAAE,UAAU,EAAE,GAAG,IAAI,CAAC,CAAA;QACpD,OAAO,uBAAuB,CAAC,SAAS,CAAC,CAAA;IAC3C,CAAC,CAAA;AACH,CAAC;AApBD,oCAoBC;AAED,MAAM,OAAO;IAAb;QACU,qBAAgB,GAAG,YAAY,CAAC,IAAI,EAAE,QAAQ,CAAC,EAAE,OAAO,EAAE,CAAS;YACzE,KAAK,CAAC,CAAC,OAAO,CAAC,IAAI,OAAO,CAAC,CAAC,OAAO,EAAE,EAAE,CAAC,UAAU,CAAC,OAAO,EAAE,CAAC,CAAC,CAAC,CAAC,CAAA;YAChE,OAAO,CAAC,CAAA;QACV,CAAC,CAAC,CAAA;IACJ,CAAC;CAAA;AAQD,SAAgB,UAAU,CACxB,IAAU,EACV,cAG2D;IAE3D,MAAM,SAAS,GAAG,cAAc,CAAC,IAAI,CAAC,IAAI,EAAE,UAAU,CAAC,CAAA;IACvD,OAAO,uBAAuB,CAAC,SAAS,CAAC,CAAA;AAC3C,CAAC;AATD,gCASC;AAED,SAAgB,uBAAuB,CACrC,GAA6D;IAI7D,SAAS,cAAc,CAAC,IAAgB;QACtC,IAAI,IAAI,CAAC,IAAI,EAAE;YACb,OAAO,IAAI,CAAC,KAAK,CAAA;SAClB;QAED,IAAI,IAAI,CAAC,KAAK,YAAY,OAAO,EAAE;YACjC,OAAO,IAAI,CAAC,KAAK,CAAC,IAAI,CACpB,CAAC,KAAK,EAAE,EAAE,CAAC,cAAc,CAAC,GAAG,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,EAC1C,CAAC,KAAK,EAAE,EAAE,CAAC,cAAc,CAAC,GAAG,CAAC,KAAK,CAAC,KAAK,CAAC,CAAC,CAC5C,CAAA;SACF;QAED,OAAO,cAAc,CAAC,GAAG,CAAC,IAAI,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,CAAA;IAC7C,CAAC;IAED,OAAO,cAAc,CAAC,GAAG,CAAC,IAAI,EAAE,CAAC,CAAA;AACnC,CAAC;AArBD,0DAqBC","sourcesContent":["function* awaitYield<T>(value: T | Promise<T>) {\n return (yield value) as T\n}\n\nfunction awaitYieldOf<T, Yielded>(\n generator: Generator<Yielded | Promise<Yielded>, T, Yielded>\n): Generator<T | Promise<T>, T, T> {\n return awaitYield(awaitEachYieldedPromise(generator))\n}\n\nexport type AwaitYield = typeof awaitYield & {\n of: typeof awaitYieldOf\n}\n\nconst AwaitYield: AwaitYield = awaitYield as AwaitYield\nAwaitYield.of = awaitYieldOf\n\n/**\n * Create a function that may or may not be async, using a generator\n *\n * Within the generator, call `yield* awaited(maybePromise)` to await a value\n * that may or may not be a promise.\n *\n * If the inner function never yields a promise, it will return synchronously.\n */\nexport function maybeAsyncFn<\n /** Function arguments */\n Args extends any[],\n This,\n /** Function return type */\n Return,\n /** Yields to unwrap */\n Yielded\n>(\n that: This,\n fn: (\n this: This,\n awaited: AwaitYield,\n ...args: Args\n ) => Generator<Yielded | Promise<Yielded>, Return, Yielded>\n): (...args: Args) => Return | Promise<Return> {\n return (...args: Args) => {\n const generator = fn.call(that, AwaitYield, ...args)\n return awaitEachYieldedPromise(generator)\n }\n}\n\nclass Example {\n private maybeAsyncMethod = maybeAsyncFn(this, function* (awaited, a: number) {\n yield* awaited(new Promise((resolve) => setTimeout(resolve, a)))\n return 5\n })\n}\n\nexport type MaybeAsyncBlock<Return, This, Yielded, Args extends any[] = []> = (\n this: This,\n awaited: AwaitYield,\n ...args: Args\n) => Generator<Yielded | Promise<Yielded>, Return, Yielded>\n\nexport function maybeAsync<Return, This, Yielded>(\n that: This,\n startGenerator: (\n this: This,\n await: AwaitYield\n ) => Generator<Yielded | Promise<Yielded>, Return, Yielded>\n): Return | Promise<Return> {\n const generator = startGenerator.call(that, AwaitYield)\n return awaitEachYieldedPromise(generator)\n}\n\nexport function awaitEachYieldedPromise<Yielded, Returned>(\n gen: Generator<Yielded | Promise<Yielded>, Returned, Yielded>\n): Returned | Promise<Returned> {\n type NextResult = ReturnType<typeof gen.next>\n\n function handleNextStep(step: NextResult): Returned | Promise<Returned> {\n if (step.done) {\n return step.value\n }\n\n if (step.value instanceof Promise) {\n return step.value.then(\n (value) => handleNextStep(gen.next(value)),\n (error) => handleNextStep(gen.throw(error))\n )\n }\n\n return handleNextStep(gen.next(step.value))\n }\n\n return handleNextStep(gen.next())\n}\n"]}
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