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{"version":3,"file":"index.js","sources":["../src/util.ts","../src/index.ts"],"sourcesContent":["import { skipTransparentExprWrappers } from \"@babel/helper-skip-transparent-expression-wrappers\";\nimport type { NodePath } from \"@babel/traverse\";\nimport { types as t } from \"@babel/core\";\n// https://crbug.com/v8/11558\n\n// check if there is a spread element followed by another argument.\n// (...[], 0) or (...[], ...[])\n\nfunction matchAffectedArguments(argumentNodes: t.CallExpression[\"arguments\"]) {\n const spreadIndex = argumentNodes.findIndex(node => t.isSpreadElement(node));\n return spreadIndex >= 0 && spreadIndex !== argumentNodes.length - 1;\n}\n\n/**\n * Check whether the optional chain is affected by https://crbug.com/v8/11558.\n * This routine MUST not manipulate NodePath\n *\n * @export\n * @param {(NodePath<t.OptionalMemberExpression | t.OptionalCallExpression>)} path\n * @returns {boolean}\n */\nexport function shouldTransform(\n path: NodePath<t.OptionalMemberExpression | t.OptionalCallExpression>,\n): boolean {\n let optionalPath: NodePath<t.Expression> = path;\n const chains: (t.OptionalCallExpression | t.OptionalMemberExpression)[] = [];\n for (;;) {\n if (optionalPath.isOptionalMemberExpression()) {\n chains.push(optionalPath.node);\n optionalPath = skipTransparentExprWrappers(optionalPath.get(\"object\"));\n } else if (optionalPath.isOptionalCallExpression()) {\n chains.push(optionalPath.node);\n optionalPath = skipTransparentExprWrappers(optionalPath.get(\"callee\"));\n } else {\n break;\n }\n }\n for (let i = 0; i < chains.length; i++) {\n const node = chains[i];\n if (\n t.isOptionalCallExpression(node) &&\n matchAffectedArguments(node.arguments)\n ) {\n // f?.(...[], 0)\n if (node.optional) {\n return true;\n }\n // o?.m(...[], 0)\n // when node.optional is false, chains[i + 1] is always well defined\n const callee = chains[i + 1];\n if (t.isOptionalMemberExpression(callee, { optional: true })) {\n return true;\n }\n }\n }\n return false;\n}\n","import { declare } from \"@babel/helper-plugin-utils\";\nimport { transform } from \"@babel/plugin-transform-optional-chaining\";\nimport { shouldTransform } from \"./util.ts\";\nimport type { NodePath } from \"@babel/traverse\";\nimport type * as t from \"@babel/types\";\n\nexport default declare(api => {\n api.assertVersion(\n process.env.BABEL_8_BREAKING && process.env.IS_PUBLISH\n ? 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