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{"version":3,"file":"_optionalChainDelete.js","sources":["../../../src/buildPolyfills/_optionalChainDelete.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 { _optionalChain } from './_optionalChain';\n\n/**\n * Polyfill for the optional chain operator, `?.`, given previous conversion of the expression into an array of values,\n * descriptors, and functions, in cases where the value of the expression is to be deleted.\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 return value of the `delete` operator: `true`, unless the deletion target is an own, non-configurable\n * property (one which can't be deleted or turned into an accessor, and whose enumerability can't be changed), in which\n * case `false`.\n */\nexport function _optionalChainDelete(ops: unknown[]): boolean {\n  const result = _optionalChain(ops) as boolean | null;\n  // If `result` is `null`, it means we didn't get to the end of the chain and so nothing was deleted (in which case,\n  // return `true` since that's what `delete` does when it no-ops). If it's non-null, we know the delete happened, in\n  // which case we return whatever the `delete` returned, which will be a boolean.\n  return result == null ? true : result;\n}\n\n// Sucrase version:\n// function _optionalChainDelete(ops) {\n//   const result = _optionalChain(ops);\n//   // by checking for loose equality to `null`, we catch both `null` and `undefined`\n//   return result == null ? true : result;\n// }\n"],"names":["_optionalChain"],"mappings":";;;;AAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;;AAIA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACO,SAAS,oBAAoB,CAAC,GAAG,EAAsB;AAC9D,EAAE,MAAM,MAAO,GAAEA,6BAAc,CAAC,GAAG,CAAE;AACrC;AACA;AACA;AACA,EAAE,OAAO,MAAO,IAAG,OAAO,IAAA,GAAO,MAAM;AACvC;;AAEA;AACA;AACA;AACA;AACA;AACA;;;;"}