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3 years ago
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{"version":3,"file":"index.js","sources":["../src/util.ts","../src/transform.ts","../src/index.ts"],"sourcesContent":["import type { NodePath } from \"@babel/traverse\";\nimport { 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.node)) return true;\n maybeWrapped = p;\n });\n return maybeWrapped;\n}\n","import { types as t, template } from \"@babel/core\";\nimport type { NodePath } from \"@babel/traverse\";\nimport {\n skipTransparentExprWrapperNodes,\n skipTransparentExprWrappers,\n} from \"@babel/helper-skip-transparent-expression-wrappers\";\nimport { willPathCastToBoolean, findOutermostTransparentParent } from \"./util\";\n\nconst { ast } = template.expression;\n\nfunction isSimpleMemberExpression(expression) {\n expression = skipTransparentExprWrapperNodes(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 */\nfunction 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\nexport function transform(\n path: NodePath<t.OptionalCallExpression | t.OptionalMemberExpression>,\n {\n pureGetters,\n noDocumentAll,\n }: { pureGetters: boolean; noDocumentAll: boolean },\n) {\n const { scope } = path;\n // maybeWrapped points to the outermost transparent expression wrapper\n // or the path itself\n const maybeWrapped = findOutermostTr
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