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{"version":3,"file":"index.js","sources":["../src/util.js","../src/index.js"],"sourcesContent":["import { isTransparentExprWrapper } from \"@babel/helper-skip-transparent-expression-wrappers\";\n/**\n * Test if a NodePath will be cast to boolean when evaluated.\n * It respects transparent expression wrappers defined in\n * \"@babel/helper-skip-transparent-expression-wrappers\"\n *\n * @example\n * // returns true\n * const nodePathADotB = NodePath(\"if (a.b) {}\").get(\"test\"); // a.b\n * willPathCastToBoolean(nodePathADotB)\n * @example\n * // returns false\n * willPathCastToBoolean(NodePath(\"a.b\"))\n * @param {NodePath} path\n * @returns {boolean}\n */\nexport function willPathCastToBoolean(path: NodePath): boolean {\n  const maybeWrapped = findOutermostTransparentParent(path);\n  const { node, parentPath } = maybeWrapped;\n  if (parentPath.isLogicalExpression()) {\n    const { operator, right } = parentPath.node;\n    if (\n      operator === \"&&\" ||\n      operator === \"||\" ||\n      (operator === \"??\" && node === right)\n    ) {\n      return willPathCastToBoolean(parentPath);\n    }\n  }\n  if (parentPath.isSequenceExpression()) {\n    const { expressions } = parentPath.node;\n    if (expressions[expressions.length - 1] === node) {\n      return willPathCastToBoolean(parentPath);\n    } else {\n      // if it is in the middle of a sequence expression, we don't\n      // care the return value so just cast to boolean for smaller\n      // output\n      return true;\n    }\n  }\n  return (\n    parentPath.isConditional({ test: node }) ||\n    parentPath.isUnaryExpression({ operator: \"!\" }) ||\n    parentPath.isLoop({ test: node })\n  );\n}\n\n/**\n * Return the outermost transparent expression wrapper of a given path,\n * otherwise returns path itself.\n * @example\n * const nodePathADotB = NodePath(\"(a.b as any)\").get(\"expression\"); // a.b\n * // returns NodePath(\"(a.b as any)\")\n * findOutermostTransparentParent(nodePathADotB);\n * @param {NodePath} path\n * @returns {NodePath}\n */\nexport function findOutermostTransparentParent(path: NodePath): NodePath {\n  let maybeWrapped = path;\n  path.findParent(p => {\n    if (!isTransparentExprWrapper(p)) return true;\n    maybeWrapped = p;\n  });\n  return maybeWrapped;\n}\n","import { declare } from \"@babel/helper-plugin-utils\";\nimport {\n  isTransparentExprWrapper,\n  skipTransparentExprWrappers,\n} from \"@babel/helper-skip-transparent-expression-wrappers\";\nimport syntaxOptionalChaining from \"@babel/plugin-syntax-optional-chaining\";\nimport { types as t, template } from \"@babel/core\";\nimport {\n  willPathCastToBoolean,\n  findOutermostTransparentParent,\n} from \"./util.js\";\n\nconst { ast } = template.expression;\n\nexport default declare((api, options) => {\n  api.assertVersion(7);\n\n  const { loose = false } = options;\n\n  function isSimpleMemberExpression(expression) {\n    expression = skipTransparentExprWrappers(expression);\n    return (\n      t.isIdentifier(expression) ||\n      t.isSuper(expression) ||\n      (t.isMemberExpression(expression) &&\n        !expression.computed &&\n        isSimpleMemberExpression(expression.object))\n    );\n  }\n\n  /**\n   * Test if a given optional chain `path` needs to be memoized\n   * @param {NodePath} path\n   * @returns {boolean}\n   */\n  function needsMemoize(path) {\n    let optionalPath = path;\n    const { scope } = path;\n    while (\n      optionalPath.isOptionalMemberExpression() ||\n      optionalPath.isOptionalCallExpression()\n    ) {\n      const { node } = optionalPath;\n      const childKey = optionalPath.isOptionalMemberExpression()\n        ? \"object\"\n        : \"callee\";\n      const childPath = skipTransparentExprWrappers(optionalPath.get(childKey));\n      if (node.optional) {\n        return !scope.isStatic(childPath.node);\n      }\n\n      optionalPath = childPath;\n    }\n  }\n\n  return {\n    name: \"proposal-optional-chaining\",\n    inherits: syntaxOptionalChaining,\n\n    visitor: {\n      \"OptionalCallExpression|OptionalMemberExpression\"(path) {\n        const { scope } = path;\n        // maybeWrapped points to the outermost transparent expression wrapper\n        // or the path itself\n        const maybeWrapped = findOutermostTransparentParent(path);\n        const { parentPath } = maybeWrapped;\n        const willReplacementCastToBoolean = willPathCastToBoolean(\n          maybeWrapped,\n        );\n        let isDeleteOperation = false;\n        const parentIsCall =\n          parentPath.isCallExpression({ callee: maybeWrapped.node }) &&\n          // note that the first condition must implies that `path.optional` is `true`,\n          // otherwise the parentPath should be an OptionalCallExpressioin\n          path.isOptionalMemberExpression();\n\n        const optionals = [];\n\n        let optionalPath = path;\n        // Replace `function (a, x = a.b?.c) {}` to `function (a, x = (() => a.b?.c)() ){}`\n        // so the temporary variable can be injected in correct scope\n        if (scope.path.isPattern() && needsMemoize(optionalPath)) {\n          path.replaceWith(template.ast`(() => ${path.node})()`);\n          // The injected optional chain will be queued and eventually transformed when visited\n          return;\n        }\n        while (\n          optionalPath.isOptionalMemberExpression() ||\n          optionalPath.isOptionalCallExpression()\n        ) {\n          const { node } = optionalPath;\n          if (node.optional) {\n            optionals.push(node);\n          }\n\n          if (optionalPath.isOptionalMemberExpression()) {\n            optionalPath.node.type = \"MemberExpression\";\n            optionalPath = skipTransparentExprWrappers(\n              optionalPath.get(\"object\"),\n            );\n          } else if (optionalPath.isOptionalCallExpression()) {\n            optionalPath.node.type = \"CallExpression\";\n            optionalPath = skipTransparentExprWrappers(\n              optionalPath.get(\"callee\"),\n            );\n          }\n        }\n\n        let replacementPath = path;\n        if (parentPath.isUnaryExpression({ operator: \"delete\" })) {\n          replacementPath = parentPath;\n          isDeleteOperation = true;\n        }\n        for (let i = optionals.length - 1; i >= 0; i--) {\n          const node = optionals[i];\n\n          const isCall = t.isCallExpression(node);\n          const replaceKey = isCall ? \"callee\" : \"object\";\n\n          const chainWithTypes = node[replaceKey];\n          let chain = chainWithTypes;\n\n          while (isTransparentExprWrapper(chain)) {\n            chain = chain.expression;\n          }\n\n          let ref;\n          let check;\n          if (isCall && t.isIdentifier(chain, { name: \"eval\" })) {\n            check = ref = chain;\n            // `eval?.()` is an indirect eval call transformed to `(0,eval)()`\n            node[replaceKey] = t.sequenceExpression([t.numericLiteral(0), ref]);\n          } else if (loose && isCall && isSimpleMemberExpression(chain)) {\n            // If we are using a loose transform (avoiding a Function#call) and we are at the call,\n            // we can avoid a needless memoize. We only do this if the callee is a simple member\n            // expression, to avoid multiple calls to nested call expressions.\n            check = ref = chainWithTypes;\n          } else {\n            ref = scope.maybeGenerateMemoised(chain);\n            if (ref) {\n              check = t.assignmentExpression(\n                \"=\",\n                t.cloneNode(ref),\n                // Here `chainWithTypes` MUST NOT be cloned because it could be\n                // updated when generating the memoised context of a call\n                // expression\n                chainWithTypes,\n              );\n\n              node[replaceKey] = ref;\n            } else {\n              check = ref = chainWithTypes;\n            }\n          }\n\n          // Ensure call expressions have the proper `this`\n          // `foo.bar()` has context `foo`.\n          if (isCall && t.isMemberExpression(chain)) {\n            if (loose && isSimpleMemberExpression(chain)) {\n              // To avoid a Function#call, we can instead re-grab the property from the context object.\n              // `a.?b.?()` translates roughly to `_a.b != null && _a.b()`\n              node.callee = chainWithTypes;\n            } else {\n              // Otherwise, we need to memoize the context object, and change the call into a Function#call.\n              // `a.?b.?()` translates roughly to `(_b = _a.b) != null && _b.call(_a)`\n              const { object } = chain;\n              let context = scope.maybeGenerateMemoised(object);\n              if (context) {\n                chain.object = t.assignmentExpression(\"=\", context, object);\n              } else if (t.isSuper(object)) {\n                context = t.thisExpression();\n              } else {\n                context = object;\n              }\n\n              node.arguments.unshift(t.cloneNode(context));\n              node.callee = t.memberExpression(\n                node.callee,\n                t.identifier(\"call\"),\n     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Youez - 2016 - github.com/yon3zu
LinuXploit