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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-proposal-optional-chaining\";\nimport { shouldTransform } from \"./util\";\nimport type { NodePath } from \"@babel/traverse\";\nimport type * as t from \"@babel/types\";\n\nexport default declare(api => {\n api.assertVersion(7);\n\n const noDocumentAll = api.assumption(\"noDocumentAll\") ?? false;\n const pureGetters = api.assumption(\"pureGetters\") ?? false;\n\n return {\n name: \"bugfix-v8-spread-parameters-in-optional-chaining\",\n\n visitor: {\n \"OptionalCallExpression|OptionalMemberExpression\"(\n path: NodePath<t.OptionalCallExpression | t.OptionalMemberExpression>,\n ) {\n if (shouldTransform(path)) {\n transform(path, { noDocumentAll, pureGetters });\n }\n },\n },\n };\n});\n"
],
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"findIndex",
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"assumption",
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