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{"version":3,"file":"_asyncOptionalChain.js","sources":["../../../src/buildPolyfills/_asyncOptionalChain.ts"],"sourcesContent":["// https://github.com/alangpierce/sucrase/tree/265887868966917f3b924ce38dfad01fbab1329f\n//\n// The MIT License (MIT)\n//\n// Copyright (c) 2012-2018 various contributors (see AUTHORS)\n//\n// Permission is hereby granted, free of charge, to any person obtaining a copy\n// of this software and associated documentation files (the \"Software\"), to deal\n// in the Software without restriction, including without limitation the rights\n// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n// copies of the Software, and to permit persons to whom the Software is\n// furnished to do so, subject to the following conditions:\n//\n// The above copyright notice and this permission notice shall be included in all\n// copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n// SOFTWARE.\n\nimport type { GenericFunction } from './types';\n\n/**\n * Polyfill for the optional chain operator, `?.`, given previous conversion of the expression into an array of values,\n * descriptors, and functions, for situations in which at least one part of the expression is async.\n *\n * Adapted from Sucrase (https://github.com/alangpierce/sucrase) See\n * https://github.com/alangpierce/sucrase/blob/265887868966917f3b924ce38dfad01fbab1329f/src/transformers/OptionalChainingNullishTransformer.ts#L15\n *\n * @param ops Array result of expression conversion\n * @returns The value of the expression\n */\nexport async function _asyncOptionalChain(ops: unknown[]): Promise {\n  let lastAccessLHS: unknown = undefined;\n  let value = ops[0];\n  let i = 1;\n  while (i < ops.length) {\n    const op = ops[i] as string;\n    const fn = ops[i + 1] as (intermediateValue: unknown) => Promise;\n    i += 2;\n    // by checking for loose equality to `null`, we catch both `null` and `undefined`\n    if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) {\n      // really we're meaning to return `undefined` as an actual value here, but it saves bytes not to write it\n      return;\n    }\n    if (op === 'access' || op === 'optionalAccess') {\n      lastAccessLHS = value;\n      value = await fn(value);\n    } else if (op === 'call' || op === 'optionalCall') {\n      value = await fn((...args: unknown[]) => (value as GenericFunction).call(lastAccessLHS, ...args));\n      lastAccessLHS = undefined;\n    }\n  }\n  return value;\n}\n\n// Sucrase version:\n// async function _asyncOptionalChain(ops) {\n//   let lastAccessLHS = undefined;\n//   let value = ops[0];\n//   let i = 1;\n//   while (i < ops.length) {\n//     const op = ops[i];\n//     const fn = ops[i + 1];\n//     i += 2;\n//     if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) {\n//       return undefined;\n//     }\n//     if (op === 'access' || op === 'optionalAccess') {\n//       lastAccessLHS = value;\n//       value = await fn(value);\n//     } else if (op === 'call' || op === 'optionalCall') {\n//       value = await fn((...args) => value.call(lastAccessLHS, ...args));\n//       lastAccessLHS = undefined;\n//     }\n//   }\n//   return value;\n// }\n"],"names":[],"mappings":"AA0BA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACO,eAAe,mBAAmB,CAAC,GAAG,EAA+B;AAC5E,EAAE,IAAI,aAAa,GAAY,SAAS;AACxC,EAAE,IAAI,KAAM,GAAE,GAAG,CAAC,CAAC,CAAC;AACpB,EAAE,IAAI,CAAE,GAAE,CAAC;AACX,EAAE,OAAO,CAAA,GAAI,GAAG,CAAC,MAAM,EAAE;AACzB,IAAI,MAAM,EAAG,GAAE,GAAG,CAAC,CAAC,CAAE;AACtB,IAAI,MAAM,KAAK,GAAG,CAAC,CAAE,GAAE,CAAC,CAAE;AAC1B,IAAI,CAAA,IAAK,CAAC;AACV;AACA,IAAI,IAAI,CAAC,EAAA,KAAO,gBAAiB,IAAG,EAAG,KAAI,cAAc,KAAK,KAAM,IAAG,IAAI,EAAE;AAC7E;AACA,MAAM;AACN;AACA,IAAI,IAAI,EAAG,KAAI,YAAY,EAAA,KAAO,gBAAgB,EAAE;AACpD,MAAM,aAAA,GAAgB,KAAK;AAC3B,MAAM,QAAQ,MAAM,EAAE,CAAC,KAAK,CAAC;AAC7B,KAAI,MAAO,IAAI,EAAA,KAAO,MAAA,IAAU,EAAA,KAAO,cAAc,EAAE;AACvD,MAAM,KAAA,GAAQ,MAAM,EAAE,CAAC,CAAC,GAAG,IAAI,KAAgB,CAAC,KAAM,GAAoB,IAAI,CAAC,aAAa,EAAE,GAAG,IAAI,CAAC,CAAC;AACvG,MAAM,aAAA,GAAgB,SAAS;AAC/B;AACA;AACA,EAAE,OAAO,KAAK;AACd;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;;;"}