Commit be99e06f authored by minhnguyengp1's avatar minhnguyengp1
Browse files

Initial commit

parents
{"version":3,"names":["_t","require","addComment","_addComment","addComments","_addComments","shareCommentsWithSiblings","key","node","trailing","trailingComments","leading","leadingComments","prev","getSibling","next","hasPrev","Boolean","hasNext","removeIfExisting","list","toRemove","lastFoundIndex","filter","el","i","indexOf","type","content","line","comments"],"sources":["../../src/path/comments.ts"],"sourcesContent":["// This file contains methods responsible for dealing with comments.\nimport type * as t from \"@babel/types\";\nimport type NodePath from \"./index.ts\";\nimport {\n addComment as _addComment,\n addComments as _addComments,\n} from \"@babel/types\";\n\n/**\n * Share comments amongst siblings.\n */\n\nexport function shareCommentsWithSiblings(this: NodePath) {\n // NOTE: this assumes numbered keys\n if (typeof this.key === \"string\") return;\n\n const node = this.node;\n if (!node) return;\n\n const trailing = node.trailingComments;\n const leading = node.leadingComments;\n if (!trailing && !leading) return;\n\n const prev = this.getSibling(this.key - 1);\n const next = this.getSibling(this.key + 1);\n const hasPrev = Boolean(prev.node);\n const hasNext = Boolean(next.node);\n\n if (hasPrev) {\n if (leading) {\n prev.addComments(\n \"trailing\",\n removeIfExisting(leading, prev.node.trailingComments),\n );\n }\n if (trailing && !hasNext) prev.addComments(\"trailing\", trailing);\n }\n if (hasNext) {\n if (trailing) {\n next.addComments(\n \"leading\",\n removeIfExisting(trailing, next.node.leadingComments),\n );\n }\n if (leading && !hasPrev) next.addComments(\"leading\", leading);\n }\n}\n\nfunction removeIfExisting<T>(list: T[], toRemove?: T[]): T[] {\n if (!toRemove) return list;\n let lastFoundIndex = -1;\n return list.filter(el => {\n const i = toRemove.indexOf(el, lastFoundIndex);\n if (i === -1) return true;\n lastFoundIndex = i;\n });\n}\n\nexport function addComment(\n this: NodePath,\n type: t.CommentTypeShorthand,\n content: string,\n line?: boolean,\n) {\n _addComment(this.node, type, content, line);\n}\n\n/**\n * Give node `comments` of the specified `type`.\n */\n\nexport function addComments(\n this: NodePath,\n type: t.CommentTypeShorthand,\n comments: t.Comment[],\n) {\n _addComments(this.node, type, comments);\n}\n"],"mappings":";;;;;;;;AAGA,IAAAA,EAAA,GAAAC,OAAA;AAGsB;EAFpBC,UAAU,EAAIC,WAAW;EACzBC,WAAW,EAAIC;AAAY,IAAAL,EAAA;AAOtB,SAASM,yBAAyBA,CAAA,EAAiB;EAExD,IAAI,OAAO,IAAI,CAACC,GAAG,KAAK,QAAQ,EAAE;EAElC,MAAMC,IAAI,GAAG,IAAI,CAACA,IAAI;EACtB,IAAI,CAACA,IAAI,EAAE;EAEX,MAAMC,QAAQ,GAAGD,IAAI,CAACE,gBAAgB;EACtC,MAAMC,OAAO,GAAGH,IAAI,CAACI,eAAe;EACpC,IAAI,CAACH,QAAQ,IAAI,CAACE,OAAO,EAAE;EAE3B,MAAME,IAAI,GAAG,IAAI,CAACC,UAAU,CAAC,IAAI,CAACP,GAAG,GAAG,CAAC,CAAC;EAC1C,MAAMQ,IAAI,GAAG,IAAI,CAACD,UAAU,CAAC,IAAI,CAACP,GAAG,GAAG,CAAC,CAAC;EAC1C,MAAMS,OAAO,GAAGC,OAAO,CAACJ,IAAI,CAACL,IAAI,CAAC;EAClC,MAAMU,OAAO,GAAGD,OAAO,CAACF,IAAI,CAACP,IAAI,CAAC;EAElC,IAAIQ,OAAO,EAAE;IACX,IAAIL,OAAO,EAAE;MACXE,IAAI,CAACT,WAAW,CACd,UAAU,EACVe,gBAAgB,CAACR,OAAO,EAAEE,IAAI,CAACL,IAAI,CAACE,gBAAgB,CACtD,CAAC;IACH;IACA,IAAID,QAAQ,IAAI,CAACS,OAAO,EAAEL,IAAI,CAACT,WAAW,CAAC,UAAU,EAAEK,QAAQ,CAAC;EAClE;EACA,IAAIS,OAAO,EAAE;IACX,IAAIT,QAAQ,EAAE;MACZM,IAAI,CAACX,WAAW,CACd,SAAS,EACTe,gBAAgB,CAACV,QAAQ,EAAEM,IAAI,CAACP,IAAI,CAACI,eAAe,CACtD,CAAC;IACH;IACA,IAAID,OAAO,IAAI,CAACK,OAAO,EAAED,IAAI,CAACX,WAAW,CAAC,SAAS,EAAEO,OAAO,CAAC;EAC/D;AACF;AAEA,SAASQ,gBAAgBA,CAAIC,IAAS,EAAEC,QAAc,EAAO;EAC3D,IAAI,CAACA,QAAQ,EAAE,OAAOD,IAAI;EAC1B,IAAIE,cAAc,GAAG,CAAC,CAAC;EACvB,OAAOF,IAAI,CAACG,MAAM,CAACC,EAAE,IAAI;IACvB,MAAMC,CAAC,GAAGJ,QAAQ,CAACK,OAAO,CAACF,EAAE,EAAEF,cAAc,CAAC;IAC9C,IAAIG,CAAC,KAAK,CAAC,CAAC,EAAE,OAAO,IAAI;IACzBH,cAAc,GAAGG,CAAC;EACpB,CAAC,CAAC;AACJ;AAEO,SAASvB,UAAUA,CAExByB,IAA4B,EAC5BC,OAAe,EACfC,IAAc,EACd;EACA1B,WAAW,CAAC,IAAI,CAACK,IAAI,EAAEmB,IAAI,EAAEC,OAAO,EAAEC,IAAI,CAAC;AAC7C;AAMO,SAASzB,WAAWA,CAEzBuB,IAA4B,EAC5BG,QAAqB,EACrB;EACAzB,YAAY,CAAC,IAAI,CAACG,IAAI,EAAEmB,IAAI,EAAEG,QAAQ,CAAC;AACzC"}
\ No newline at end of file
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports._call = _call;
exports._getQueueContexts = _getQueueContexts;
exports._resyncKey = _resyncKey;
exports._resyncList = _resyncList;
exports._resyncParent = _resyncParent;
exports._resyncRemoved = _resyncRemoved;
exports.call = call;
exports.isBlacklisted = exports.isDenylisted = isDenylisted;
exports.popContext = popContext;
exports.pushContext = pushContext;
exports.requeue = requeue;
exports.resync = resync;
exports.setContext = setContext;
exports.setKey = setKey;
exports.setScope = setScope;
exports.setup = setup;
exports.skip = skip;
exports.skipKey = skipKey;
exports.stop = stop;
exports.visit = visit;
var _traverseNode = require("../traverse-node.js");
var _index = require("./index.js");
function call(key) {
const opts = this.opts;
this.debug(key);
if (this.node) {
if (this._call(opts[key])) return true;
}
if (this.node) {
var _opts$this$node$type;
return this._call((_opts$this$node$type = opts[this.node.type]) == null ? void 0 : _opts$this$node$type[key]);
}
return false;
}
function _call(fns) {
if (!fns) return false;
for (const fn of fns) {
if (!fn) continue;
const node = this.node;
if (!node) return true;
const ret = fn.call(this.state, this, this.state);
if (ret && typeof ret === "object" && typeof ret.then === "function") {
throw new Error(`You appear to be using a plugin with an async traversal visitor, ` + `which your current version of Babel does not support. ` + `If you're using a published plugin, you may need to upgrade ` + `your @babel/core version.`);
}
if (ret) {
throw new Error(`Unexpected return value from visitor method ${fn}`);
}
if (this.node !== node) return true;
if (this._traverseFlags > 0) return true;
}
return false;
}
function isDenylisted() {
var _this$opts$denylist;
const denylist = (_this$opts$denylist = this.opts.denylist) != null ? _this$opts$denylist : this.opts.blacklist;
return denylist && denylist.indexOf(this.node.type) > -1;
}
function restoreContext(path, context) {
if (path.context !== context) {
path.context = context;
path.state = context.state;
path.opts = context.opts;
}
}
function visit() {
var _this$opts$shouldSkip, _this$opts;
if (!this.node) {
return false;
}
if (this.isDenylisted()) {
return false;
}
if ((_this$opts$shouldSkip = (_this$opts = this.opts).shouldSkip) != null && _this$opts$shouldSkip.call(_this$opts, this)) {
return false;
}
const currentContext = this.context;
if (this.shouldSkip || this.call("enter")) {
this.debug("Skip...");
return this.shouldStop;
}
restoreContext(this, currentContext);
this.debug("Recursing into...");
this.shouldStop = (0, _traverseNode.traverseNode)(this.node, this.opts, this.scope, this.state, this, this.skipKeys);
restoreContext(this, currentContext);
this.call("exit");
return this.shouldStop;
}
function skip() {
this.shouldSkip = true;
}
function skipKey(key) {
if (this.skipKeys == null) {
this.skipKeys = {};
}
this.skipKeys[key] = true;
}
function stop() {
this._traverseFlags |= _index.SHOULD_SKIP | _index.SHOULD_STOP;
}
function setScope() {
var _this$opts2, _this$scope;
if ((_this$opts2 = this.opts) != null && _this$opts2.noScope) return;
let path = this.parentPath;
if ((this.key === "key" || this.listKey === "decorators") && path.isMethod() || this.key === "discriminant" && path.isSwitchStatement()) {
path = path.parentPath;
}
let target;
while (path && !target) {
var _path$opts;
if ((_path$opts = path.opts) != null && _path$opts.noScope) return;
target = path.scope;
path = path.parentPath;
}
this.scope = this.getScope(target);
(_this$scope = this.scope) == null ? void 0 : _this$scope.init();
}
function setContext(context) {
if (this.skipKeys != null) {
this.skipKeys = {};
}
this._traverseFlags = 0;
if (context) {
this.context = context;
this.state = context.state;
this.opts = context.opts;
}
this.setScope();
return this;
}
function resync() {
if (this.removed) return;
this._resyncParent();
this._resyncList();
this._resyncKey();
}
function _resyncParent() {
if (this.parentPath) {
this.parent = this.parentPath.node;
}
}
function _resyncKey() {
if (!this.container) return;
if (this.node === this.container[this.key]) {
return;
}
if (Array.isArray(this.container)) {
for (let i = 0; i < this.container.length; i++) {
if (this.container[i] === this.node) {
this.setKey(i);
return;
}
}
} else {
for (const key of Object.keys(this.container)) {
if (this.container[key] === this.node) {
this.setKey(key);
return;
}
}
}
this.key = null;
}
function _resyncList() {
if (!this.parent || !this.inList) return;
const newContainer = this.parent[this.listKey];
if (this.container === newContainer) return;
this.container = newContainer || null;
}
function _resyncRemoved() {
if (this.key == null || !this.container || this.container[this.key] !== this.node) {
this._markRemoved();
}
}
function popContext() {
this.contexts.pop();
if (this.contexts.length > 0) {
this.setContext(this.contexts[this.contexts.length - 1]);
} else {
this.setContext(undefined);
}
}
function pushContext(context) {
this.contexts.push(context);
this.setContext(context);
}
function setup(parentPath, container, listKey, key) {
this.listKey = listKey;
this.container = container;
this.parentPath = parentPath || this.parentPath;
this.setKey(key);
}
function setKey(key) {
var _this$node;
this.key = key;
this.node = this.container[this.key];
this.type = (_this$node = this.node) == null ? void 0 : _this$node.type;
}
function requeue(pathToQueue = this) {
if (pathToQueue.removed) return;
;
const contexts = this.contexts;
for (const context of contexts) {
context.maybeQueue(pathToQueue);
}
}
function _getQueueContexts() {
let path = this;
let contexts = this.contexts;
while (!contexts.length) {
path = path.parentPath;
if (!path) break;
contexts = path.contexts;
}
return contexts;
}
//# sourceMappingURL=context.js.map
{"version":3,"names":["_traverseNode","require","_index","call","key","opts","debug","node","_call","_opts$this$node$type","type","fns","fn","ret","state","then","Error","_traverseFlags","isDenylisted","_this$opts$denylist","denylist","blacklist","indexOf","restoreContext","path","context","visit","_this$opts$shouldSkip","_this$opts","shouldSkip","currentContext","shouldStop","traverseNode","scope","skipKeys","skip","skipKey","stop","SHOULD_SKIP","SHOULD_STOP","setScope","_this$opts2","_this$scope","noScope","parentPath","listKey","isMethod","isSwitchStatement","target","_path$opts","getScope","init","setContext","resync","removed","_resyncParent","_resyncList","_resyncKey","parent","container","Array","isArray","i","length","setKey","Object","keys","inList","newContainer","_resyncRemoved","_markRemoved","popContext","contexts","pop","undefined","pushContext","push","setup","_this$node","requeue","pathToQueue","maybeQueue","_getQueueContexts"],"sources":["../../src/path/context.ts"],"sourcesContent":["// This file contains methods responsible for maintaining a TraversalContext.\n\nimport { traverseNode } from \"../traverse-node.ts\";\nimport { SHOULD_SKIP, SHOULD_STOP } from \"./index.ts\";\nimport type TraversalContext from \"../context.ts\";\nimport type { VisitPhase } from \"../types.ts\";\nimport type NodePath from \"./index.ts\";\nimport type * as t from \"@babel/types\";\n\nexport function call(this: NodePath, key: VisitPhase): boolean {\n const opts = this.opts;\n\n this.debug(key);\n\n if (this.node) {\n if (this._call(opts[key])) return true;\n }\n\n if (this.node) {\n return this._call(opts[this.node.type]?.[key]);\n }\n\n return false;\n}\n\nexport function _call(this: NodePath, fns?: Array<Function>): boolean {\n if (!fns) return false;\n\n for (const fn of fns) {\n if (!fn) continue;\n\n const node = this.node;\n if (!node) return true;\n\n const ret = fn.call(this.state, this, this.state);\n if (ret && typeof ret === \"object\" && typeof ret.then === \"function\") {\n throw new Error(\n `You appear to be using a plugin with an async traversal visitor, ` +\n `which your current version of Babel does not support. ` +\n `If you're using a published plugin, you may need to upgrade ` +\n `your @babel/core version.`,\n );\n }\n if (ret) {\n throw new Error(`Unexpected return value from visitor method ${fn}`);\n }\n\n // node has been replaced, it will have been requeued\n if (this.node !== node) return true;\n\n // this.shouldSkip || this.shouldStop || this.removed\n if (this._traverseFlags > 0) return true;\n }\n\n return false;\n}\n\nexport function isDenylisted(this: NodePath): boolean {\n // @ts-expect-error TODO(Babel 8): Remove blacklist\n const denylist = this.opts.denylist ?? this.opts.blacklist;\n return denylist && denylist.indexOf(this.node.type) > -1;\n}\n\n// TODO: Remove in Babel 8\nexport { isDenylisted as isBlacklisted };\n\nfunction restoreContext(path: NodePath, context: TraversalContext) {\n if (path.context !== context) {\n path.context = context;\n path.state = context.state;\n path.opts = context.opts;\n }\n}\n\nexport function visit(this: NodePath): boolean {\n if (!this.node) {\n return false;\n }\n\n if (this.isDenylisted()) {\n return false;\n }\n\n if (this.opts.shouldSkip?.(this)) {\n return false;\n }\n\n const currentContext = this.context;\n // Note: We need to check \"this.shouldSkip\" first because\n // another visitor can set it to true. Usually .shouldSkip is false\n // before calling the enter visitor, but it can be true in case of\n // a requeued node (e.g. by .replaceWith()) that is then marked\n // with .skip().\n if (this.shouldSkip || this.call(\"enter\")) {\n this.debug(\"Skip...\");\n return this.shouldStop;\n }\n restoreContext(this, currentContext);\n\n this.debug(\"Recursing into...\");\n this.shouldStop = traverseNode(\n this.node,\n this.opts,\n this.scope,\n this.state,\n this,\n this.skipKeys,\n );\n\n restoreContext(this, currentContext);\n\n this.call(\"exit\");\n\n return this.shouldStop;\n}\n\nexport function skip(this: NodePath) {\n this.shouldSkip = true;\n}\n\nexport function skipKey(this: NodePath, key: string) {\n if (this.skipKeys == null) {\n this.skipKeys = {};\n }\n this.skipKeys[key] = true;\n}\n\nexport function stop(this: NodePath) {\n // this.shouldSkip = true; this.shouldStop = true;\n this._traverseFlags |= SHOULD_SKIP | SHOULD_STOP;\n}\n\nexport function setScope(this: NodePath) {\n if (this.opts?.noScope) return;\n\n let path = this.parentPath;\n\n if (\n // Skip method scope if is computed method key or decorator expression\n ((this.key === \"key\" || this.listKey === \"decorators\") &&\n path.isMethod()) ||\n // Skip switch scope if for discriminant (`x` in `switch (x) {}`).\n (this.key === \"discriminant\" && path.isSwitchStatement())\n ) {\n path = path.parentPath;\n }\n\n let target;\n while (path && !target) {\n if (path.opts?.noScope) return;\n\n target = path.scope;\n path = path.parentPath;\n }\n\n this.scope = this.getScope(target);\n this.scope?.init();\n}\n\nexport function setContext<S = unknown>(\n this: NodePath,\n context?: TraversalContext<S>,\n) {\n if (this.skipKeys != null) {\n this.skipKeys = {};\n }\n // this.shouldSkip = false; this.shouldStop = false; this.removed = false;\n this._traverseFlags = 0;\n\n if (context) {\n this.context = context;\n this.state = context.state;\n // Discard the S type parameter from context.opts\n this.opts = context.opts as typeof this.opts;\n }\n\n this.setScope();\n\n return this;\n}\n\n/**\n * Here we resync the node paths `key` and `container`. If they've changed according\n * to what we have stored internally then we attempt to resync by crawling and looking\n * for the new values.\n */\n\nexport function resync(this: NodePath) {\n if (this.removed) return;\n\n this._resyncParent();\n this._resyncList();\n this._resyncKey();\n //this._resyncRemoved();\n}\n\nexport function _resyncParent(this: NodePath) {\n if (this.parentPath) {\n this.parent = this.parentPath.node;\n }\n}\n\nexport function _resyncKey(this: NodePath) {\n if (!this.container) return;\n\n if (\n this.node ===\n // @ts-expect-error this.key should present in this.container\n this.container[this.key]\n ) {\n return;\n }\n\n // grrr, path key is out of sync. this is likely due to a modification to the AST\n // not done through our path APIs\n\n if (Array.isArray(this.container)) {\n for (let i = 0; i < this.container.length; i++) {\n if (this.container[i] === this.node) {\n this.setKey(i);\n return;\n }\n }\n } else {\n for (const key of Object.keys(this.container)) {\n // @ts-expect-error this.key should present in this.container\n if (this.container[key] === this.node) {\n this.setKey(key);\n return;\n }\n }\n }\n\n // ¯\\_(ツ)_/¯ who knows where it's gone lol\n this.key = null;\n}\n\nexport function _resyncList(this: NodePath) {\n if (!this.parent || !this.inList) return;\n\n const newContainer =\n // @ts-expect-error this.listKey should present in this.parent\n this.parent[this.listKey];\n if (this.container === newContainer) return;\n\n // container is out of sync. this is likely the result of it being reassigned\n this.container = newContainer || null;\n}\n\nexport function _resyncRemoved(this: NodePath) {\n if (\n this.key == null ||\n !this.container ||\n // @ts-expect-error this.key should present in this.container\n this.container[this.key] !== this.node\n ) {\n this._markRemoved();\n }\n}\n\nexport function popContext(this: NodePath) {\n this.contexts.pop();\n if (this.contexts.length > 0) {\n this.setContext(this.contexts[this.contexts.length - 1]);\n } else {\n this.setContext(undefined);\n }\n}\n\nexport function pushContext(this: NodePath, context: TraversalContext) {\n this.contexts.push(context);\n this.setContext(context);\n}\n\nexport function setup(\n this: NodePath,\n parentPath: NodePath | undefined,\n container: t.Node | t.Node[],\n listKey: string,\n key: string | number,\n) {\n this.listKey = listKey;\n this.container = container;\n\n this.parentPath = parentPath || this.parentPath;\n this.setKey(key);\n}\n\nexport function setKey(this: NodePath, key: string | number) {\n this.key = key;\n this.node =\n // @ts-expect-error this.key must present in this.container\n this.container[this.key];\n this.type = this.node?.type;\n}\n\nexport function requeue(this: NodePath, pathToQueue = this) {\n if (pathToQueue.removed) return;\n\n // If a path is skipped, and then replaced with a\n // new one, the new one shouldn't probably be skipped.\n if (process.env.BABEL_8_BREAKING) {\n pathToQueue.shouldSkip = false;\n }\n\n // TODO(loganfsmyth): This should be switched back to queue in parent contexts\n // automatically once #2892 and #4135 have been resolved. See #4140.\n // let contexts = this._getQueueContexts();\n const contexts = this.contexts;\n\n for (const context of contexts) {\n context.maybeQueue(pathToQueue);\n }\n}\n\nexport function _getQueueContexts(this: NodePath) {\n let path = this;\n let contexts = this.contexts;\n while (!contexts.length) {\n path = path.parentPath;\n if (!path) break;\n contexts = path.contexts;\n }\n return 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\ No newline at end of file
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.arrowFunctionToExpression = arrowFunctionToExpression;
exports.ensureBlock = ensureBlock;
exports.toComputedKey = toComputedKey;
exports.unwrapFunctionEnvironment = unwrapFunctionEnvironment;
var _t = require("@babel/types");
var _helperEnvironmentVisitor = require("@babel/helper-environment-visitor");
var _helperFunctionName = require("@babel/helper-function-name");
var _visitors = require("../visitors.js");
const {
arrowFunctionExpression,
assignmentExpression,
binaryExpression,
blockStatement,
callExpression,
conditionalExpression,
expressionStatement,
identifier,
isIdentifier,
jsxIdentifier,
logicalExpression,
LOGICAL_OPERATORS,
memberExpression,
metaProperty,
numericLiteral,
objectExpression,
restElement,
returnStatement,
sequenceExpression,
spreadElement,
stringLiteral,
super: _super,
thisExpression,
toExpression,
unaryExpression
} = _t;
function toComputedKey() {
let key;
if (this.isMemberExpression()) {
key = this.node.property;
} else if (this.isProperty() || this.isMethod()) {
key = this.node.key;
} else {
throw new ReferenceError("todo");
}
if (!this.node.computed) {
if (isIdentifier(key)) key = stringLiteral(key.name);
}
return key;
}
function ensureBlock() {
const body = this.get("body");
const bodyNode = body.node;
if (Array.isArray(body)) {
throw new Error("Can't convert array path to a block statement");
}
if (!bodyNode) {
throw new Error("Can't convert node without a body");
}
if (body.isBlockStatement()) {
return bodyNode;
}
const statements = [];
let stringPath = "body";
let key;
let listKey;
if (body.isStatement()) {
listKey = "body";
key = 0;
statements.push(body.node);
} else {
stringPath += ".body.0";
if (this.isFunction()) {
key = "argument";
statements.push(returnStatement(body.node));
} else {
key = "expression";
statements.push(expressionStatement(body.node));
}
}
this.node.body = blockStatement(statements);
const parentPath = this.get(stringPath);
body.setup(parentPath, listKey ? parentPath.node[listKey] : parentPath.node, listKey, key);
return this.node;
}
{
exports.arrowFunctionToShadowed = function () {
if (!this.isArrowFunctionExpression()) return;
this.arrowFunctionToExpression();
};
}
function unwrapFunctionEnvironment() {
if (!this.isArrowFunctionExpression() && !this.isFunctionExpression() && !this.isFunctionDeclaration()) {
throw this.buildCodeFrameError("Can only unwrap the environment of a function.");
}
hoistFunctionEnvironment(this);
}
function setType(path, type) {
path.node.type = type;
}
function arrowFunctionToExpression({
allowInsertArrow = true,
allowInsertArrowWithRest = allowInsertArrow,
noNewArrows = !(_arguments$ => (_arguments$ = arguments[0]) == null ? void 0 : _arguments$.specCompliant)()
} = {}) {
if (!this.isArrowFunctionExpression()) {
throw this.buildCodeFrameError("Cannot convert non-arrow function to a function expression.");
}
const {
thisBinding,
fnPath: fn
} = hoistFunctionEnvironment(this, noNewArrows, allowInsertArrow, allowInsertArrowWithRest);
fn.ensureBlock();
setType(fn, "FunctionExpression");
if (!noNewArrows) {
const checkBinding = thisBinding ? null : fn.scope.generateUidIdentifier("arrowCheckId");
if (checkBinding) {
fn.parentPath.scope.push({
id: checkBinding,
init: objectExpression([])
});
}
fn.get("body").unshiftContainer("body", expressionStatement(callExpression(this.hub.addHelper("newArrowCheck"), [thisExpression(), checkBinding ? identifier(checkBinding.name) : identifier(thisBinding)])));
fn.replaceWith(callExpression(memberExpression((0, _helperFunctionName.default)(this, true) || fn.node, identifier("bind")), [checkBinding ? identifier(checkBinding.name) : thisExpression()]));
return fn.get("callee.object");
}
return fn;
}
const getSuperCallsVisitor = (0, _visitors.merge)([{
CallExpression(child, {
allSuperCalls
}) {
if (!child.get("callee").isSuper()) return;
allSuperCalls.push(child);
}
}, _helperEnvironmentVisitor.default]);
function hoistFunctionEnvironment(fnPath, noNewArrows = true, allowInsertArrow = true, allowInsertArrowWithRest = true) {
let arrowParent;
let thisEnvFn = fnPath.findParent(p => {
if (p.isArrowFunctionExpression()) {
var _arrowParent;
(_arrowParent = arrowParent) != null ? _arrowParent : arrowParent = p;
return false;
}
return p.isFunction() || p.isProgram() || p.isClassProperty({
static: false
}) || p.isClassPrivateProperty({
static: false
});
});
const inConstructor = thisEnvFn.isClassMethod({
kind: "constructor"
});
if (thisEnvFn.isClassProperty() || thisEnvFn.isClassPrivateProperty()) {
if (arrowParent) {
thisEnvFn = arrowParent;
} else if (allowInsertArrow) {
fnPath.replaceWith(callExpression(arrowFunctionExpression([], toExpression(fnPath.node)), []));
thisEnvFn = fnPath.get("callee");
fnPath = thisEnvFn.get("body");
} else {
throw fnPath.buildCodeFrameError("Unable to transform arrow inside class property");
}
}
const {
thisPaths,
argumentsPaths,
newTargetPaths,
superProps,
superCalls
} = getScopeInformation(fnPath);
if (inConstructor && superCalls.length > 0) {
if (!allowInsertArrow) {
throw superCalls[0].buildCodeFrameError("When using '@babel/plugin-transform-arrow-functions', " + "it's not possible to compile `super()` in an arrow function without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
}
if (!allowInsertArrowWithRest) {
throw superCalls[0].buildCodeFrameError("When using '@babel/plugin-transform-parameters', " + "it's not possible to compile `super()` in an arrow function with default or rest parameters without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
}
const allSuperCalls = [];
thisEnvFn.traverse(getSuperCallsVisitor, {
allSuperCalls
});
const superBinding = getSuperBinding(thisEnvFn);
allSuperCalls.forEach(superCall => {
const callee = identifier(superBinding);
callee.loc = superCall.node.callee.loc;
superCall.get("callee").replaceWith(callee);
});
}
if (argumentsPaths.length > 0) {
const argumentsBinding = getBinding(thisEnvFn, "arguments", () => {
const args = () => identifier("arguments");
if (thisEnvFn.scope.path.isProgram()) {
return conditionalExpression(binaryExpression("===", unaryExpression("typeof", args()), stringLiteral("undefined")), thisEnvFn.scope.buildUndefinedNode(), args());
} else {
return args();
}
});
argumentsPaths.forEach(argumentsChild => {
const argsRef = identifier(argumentsBinding);
argsRef.loc = argumentsChild.node.loc;
argumentsChild.replaceWith(argsRef);
});
}
if (newTargetPaths.length > 0) {
const newTargetBinding = getBinding(thisEnvFn, "newtarget", () => metaProperty(identifier("new"), identifier("target")));
newTargetPaths.forEach(targetChild => {
const targetRef = identifier(newTargetBinding);
targetRef.loc = targetChild.node.loc;
targetChild.replaceWith(targetRef);
});
}
if (superProps.length > 0) {
if (!allowInsertArrow) {
throw superProps[0].buildCodeFrameError("When using '@babel/plugin-transform-arrow-functions', " + "it's not possible to compile `super.prop` in an arrow function without compiling classes.\n" + "Please add '@babel/plugin-transform-classes' to your Babel configuration.");
}
const flatSuperProps = superProps.reduce((acc, superProp) => acc.concat(standardizeSuperProperty(superProp)), []);
flatSuperProps.forEach(superProp => {
const key = superProp.node.computed ? "" : superProp.get("property").node.name;
const superParentPath = superProp.parentPath;
const isAssignment = superParentPath.isAssignmentExpression({
left: superProp.node
});
const isCall = superParentPath.isCallExpression({
callee: superProp.node
});
const isTaggedTemplate = superParentPath.isTaggedTemplateExpression({
tag: superProp.node
});
const superBinding = getSuperPropBinding(thisEnvFn, isAssignment, key);
const args = [];
if (superProp.node.computed) {
args.push(superProp.get("property").node);
}
if (isAssignment) {
const value = superParentPath.node.right;
args.push(value);
}
const call = callExpression(identifier(superBinding), args);
if (isCall) {
superParentPath.unshiftContainer("arguments", thisExpression());
superProp.replaceWith(memberExpression(call, identifier("call")));
thisPaths.push(superParentPath.get("arguments.0"));
} else if (isAssignment) {
superParentPath.replaceWith(call);
} else if (isTaggedTemplate) {
superProp.replaceWith(callExpression(memberExpression(call, identifier("bind"), false), [thisExpression()]));
thisPaths.push(superProp.get("arguments.0"));
} else {
superProp.replaceWith(call);
}
});
}
let thisBinding;
if (thisPaths.length > 0 || !noNewArrows) {
thisBinding = getThisBinding(thisEnvFn, inConstructor);
if (noNewArrows || inConstructor && hasSuperClass(thisEnvFn)) {
thisPaths.forEach(thisChild => {
const thisRef = thisChild.isJSX() ? jsxIdentifier(thisBinding) : identifier(thisBinding);
thisRef.loc = thisChild.node.loc;
thisChild.replaceWith(thisRef);
});
if (!noNewArrows) thisBinding = null;
}
}
return {
thisBinding,
fnPath
};
}
function isLogicalOp(op) {
return LOGICAL_OPERATORS.includes(op);
}
function standardizeSuperProperty(superProp) {
if (superProp.parentPath.isAssignmentExpression() && superProp.parentPath.node.operator !== "=") {
const assignmentPath = superProp.parentPath;
const op = assignmentPath.node.operator.slice(0, -1);
const value = assignmentPath.node.right;
const isLogicalAssignment = isLogicalOp(op);
if (superProp.node.computed) {
const tmp = superProp.scope.generateDeclaredUidIdentifier("tmp");
const object = superProp.node.object;
const property = superProp.node.property;
assignmentPath.get("left").replaceWith(memberExpression(object, assignmentExpression("=", tmp, property), true));
assignmentPath.get("right").replaceWith(rightExpression(isLogicalAssignment ? "=" : op, memberExpression(object, identifier(tmp.name), true), value));
} else {
const object = superProp.node.object;
const property = superProp.node.property;
assignmentPath.get("left").replaceWith(memberExpression(object, property));
assignmentPath.get("right").replaceWith(rightExpression(isLogicalAssignment ? "=" : op, memberExpression(object, identifier(property.name)), value));
}
if (isLogicalAssignment) {
assignmentPath.replaceWith(logicalExpression(op, assignmentPath.node.left, assignmentPath.node.right));
} else {
assignmentPath.node.operator = "=";
}
return [assignmentPath.get("left"), assignmentPath.get("right").get("left")];
} else if (superProp.parentPath.isUpdateExpression()) {
const updateExpr = superProp.parentPath;
const tmp = superProp.scope.generateDeclaredUidIdentifier("tmp");
const computedKey = superProp.node.computed ? superProp.scope.generateDeclaredUidIdentifier("prop") : null;
const parts = [assignmentExpression("=", tmp, memberExpression(superProp.node.object, computedKey ? assignmentExpression("=", computedKey, superProp.node.property) : superProp.node.property, superProp.node.computed)), assignmentExpression("=", memberExpression(superProp.node.object, computedKey ? identifier(computedKey.name) : superProp.node.property, superProp.node.computed), binaryExpression(superProp.parentPath.node.operator[0], identifier(tmp.name), numericLiteral(1)))];
if (!superProp.parentPath.node.prefix) {
parts.push(identifier(tmp.name));
}
updateExpr.replaceWith(sequenceExpression(parts));
const left = updateExpr.get("expressions.0.right");
const right = updateExpr.get("expressions.1.left");
return [left, right];
}
return [superProp];
function rightExpression(op, left, right) {
if (op === "=") {
return assignmentExpression("=", left, right);
} else {
return binaryExpression(op, left, right);
}
}
}
function hasSuperClass(thisEnvFn) {
return thisEnvFn.isClassMethod() && !!thisEnvFn.parentPath.parentPath.node.superClass;
}
const assignSuperThisVisitor = (0, _visitors.merge)([{
CallExpression(child, {
supers,
thisBinding
}) {
if (!child.get("callee").isSuper()) return;
if (supers.has(child.node)) return;
supers.add(child.node);
child.replaceWithMultiple([child.node, assignmentExpression("=", identifier(thisBinding), identifier("this"))]);
}
}, _helperEnvironmentVisitor.default]);
function getThisBinding(thisEnvFn, inConstructor) {
return getBinding(thisEnvFn, "this", thisBinding => {
if (!inConstructor || !hasSuperClass(thisEnvFn)) return thisExpression();
thisEnvFn.traverse(assignSuperThisVisitor, {
supers: new WeakSet(),
thisBinding
});
});
}
function getSuperBinding(thisEnvFn) {
return getBinding(thisEnvFn, "supercall", () => {
const argsBinding = thisEnvFn.scope.generateUidIdentifier("args");
return arrowFunctionExpression([restElement(argsBinding)], callExpression(_super(), [spreadElement(identifier(argsBinding.name))]));
});
}
function getSuperPropBinding(thisEnvFn, isAssignment, propName) {
const op = isAssignment ? "set" : "get";
return getBinding(thisEnvFn, `superprop_${op}:${propName || ""}`, () => {
const argsList = [];
let fnBody;
if (propName) {
fnBody = memberExpression(_super(), identifier(propName));
} else {
const method = thisEnvFn.scope.generateUidIdentifier("prop");
argsList.unshift(method);
fnBody = memberExpression(_super(), identifier(method.name), true);
}
if (isAssignment) {
const valueIdent = thisEnvFn.scope.generateUidIdentifier("value");
argsList.push(valueIdent);
fnBody = assignmentExpression("=", fnBody, identifier(valueIdent.name));
}
return arrowFunctionExpression(argsList, fnBody);
});
}
function getBinding(thisEnvFn, key, init) {
const cacheKey = "binding:" + key;
let data = thisEnvFn.getData(cacheKey);
if (!data) {
const id = thisEnvFn.scope.generateUidIdentifier(key);
data = id.name;
thisEnvFn.setData(cacheKey, data);
thisEnvFn.scope.push({
id: id,
init: init(data)
});
}
return data;
}
const getScopeInformationVisitor = (0, _visitors.merge)([{
ThisExpression(child, {
thisPaths
}) {
thisPaths.push(child);
},
JSXIdentifier(child, {
thisPaths
}) {
if (child.node.name !== "this") return;
if (!child.parentPath.isJSXMemberExpression({
object: child.node
}) && !child.parentPath.isJSXOpeningElement({
name: child.node
})) {
return;
}
thisPaths.push(child);
},
CallExpression(child, {
superCalls
}) {
if (child.get("callee").isSuper()) superCalls.push(child);
},
MemberExpression(child, {
superProps
}) {
if (child.get("object").isSuper()) superProps.push(child);
},
Identifier(child, {
argumentsPaths
}) {
if (!child.isReferencedIdentifier({
name: "arguments"
})) return;
let curr = child.scope;
do {
if (curr.hasOwnBinding("arguments")) {
curr.rename("arguments");
return;
}
if (curr.path.isFunction() && !curr.path.isArrowFunctionExpression()) {
break;
}
} while (curr = curr.parent);
argumentsPaths.push(child);
},
MetaProperty(child, {
newTargetPaths
}) {
if (!child.get("meta").isIdentifier({
name: "new"
})) return;
if (!child.get("property").isIdentifier({
name: "target"
})) return;
newTargetPaths.push(child);
}
}, _helperEnvironmentVisitor.default]);
function getScopeInformation(fnPath) {
const thisPaths = [];
const argumentsPaths = [];
const newTargetPaths = [];
const superProps = [];
const superCalls = [];
fnPath.traverse(getScopeInformationVisitor, {
thisPaths,
argumentsPaths,
newTargetPaths,
superProps,
superCalls
});
return {
thisPaths,
argumentsPaths,
newTargetPaths,
superProps,
superCalls
};
}
//# sourceMappingURL=conversion.js.map
{"version":3,"names":["_t","require","_helperEnvironmentVisitor","_helperFunctionName","_visitors","arrowFunctionExpression","assignmentExpression","binaryExpression","blockStatement","callExpression","conditionalExpression","expressionStatement","identifier","isIdentifier","jsxIdentifier","logicalExpression","LOGICAL_OPERATORS","memberExpression","metaProperty","numericLiteral","objectExpression","restElement","returnStatement","sequenceExpression","spreadElement","stringLiteral","super","_super","thisExpression","toExpression","unaryExpression","toComputedKey","key","isMemberExpression","node","property","isProperty","isMethod","ReferenceError","computed","name","ensureBlock","body","get","bodyNode","Array","isArray","Error","isBlockStatement","statements","stringPath","listKey","isStatement","push","isFunction","parentPath","setup","exports","arrowFunctionToShadowed","isArrowFunctionExpression","arrowFunctionToExpression","unwrapFunctionEnvironment","isFunctionExpression","isFunctionDeclaration","buildCodeFrameError","hoistFunctionEnvironment","setType","path","type","allowInsertArrow","allowInsertArrowWithRest","noNewArrows","_arguments$","arguments","specCompliant","thisBinding","fnPath","fn","checkBinding","scope","generateUidIdentifier","id","init","unshiftContainer","hub","addHelper","replaceWith","nameFunction","getSuperCallsVisitor","mergeVisitors","CallExpression","child","allSuperCalls","isSuper","environmentVisitor","arrowParent","thisEnvFn","findParent","p","_arrowParent","isProgram","isClassProperty","static","isClassPrivateProperty","inConstructor","isClassMethod","kind","thisPaths","argumentsPaths","newTargetPaths","superProps","superCalls","getScopeInformation","length","traverse","superBinding","getSuperBinding","forEach","superCall","callee","loc","argumentsBinding","getBinding","args","buildUndefinedNode","argumentsChild","argsRef","newTargetBinding","targetChild","targetRef","flatSuperProps","reduce","acc","superProp","concat","standardizeSuperProperty","superParentPath","isAssignment","isAssignmentExpression","left","isCall","isCallExpression","isTaggedTemplate","isTaggedTemplateExpression","tag","getSuperPropBinding","value","right","call","getThisBinding","hasSuperClass","thisChild","thisRef","isJSX","isLogicalOp","op","includes","operator","assignmentPath","slice","isLogicalAssignment","tmp","generateDeclaredUidIdentifier","object","rightExpression","isUpdateExpression","updateExpr","computedKey","parts","prefix","superClass","assignSuperThisVisitor","supers","has","add","replaceWithMultiple","WeakSet","argsBinding","propName","argsList","fnBody","method","unshift","valueIdent","cacheKey","data","getData","setData","getScopeInformationVisitor","ThisExpression","JSXIdentifier","isJSXMemberExpression","isJSXOpeningElement","MemberExpression","Identifier","isReferencedIdentifier","curr","hasOwnBinding","rename","parent","MetaProperty"],"sources":["../../src/path/conversion.ts"],"sourcesContent":["// This file contains methods that convert the path node into another node or some other type of data.\n\nimport {\n arrowFunctionExpression,\n assignmentExpression,\n binaryExpression,\n blockStatement,\n callExpression,\n conditionalExpression,\n expressionStatement,\n identifier,\n isIdentifier,\n jsxIdentifier,\n logicalExpression,\n LOGICAL_OPERATORS,\n memberExpression,\n metaProperty,\n numericLiteral,\n objectExpression,\n restElement,\n returnStatement,\n sequenceExpression,\n spreadElement,\n stringLiteral,\n super as _super,\n thisExpression,\n toExpression,\n unaryExpression,\n} from \"@babel/types\";\nimport type * as t from \"@babel/types\";\nimport environmentVisitor from \"@babel/helper-environment-visitor\";\nimport nameFunction from \"@babel/helper-function-name\";\nimport { merge as mergeVisitors } from \"../visitors.ts\";\nimport type NodePath from \"./index.ts\";\n\nexport function toComputedKey(this: NodePath) {\n let key;\n if (this.isMemberExpression()) {\n key = this.node.property;\n } else if (this.isProperty() || this.isMethod()) {\n key = this.node.key;\n } else {\n throw new ReferenceError(\"todo\");\n }\n\n // @ts-expect-error todo(flow->ts) computed does not exist in ClassPrivateProperty\n if (!this.node.computed) {\n if (isIdentifier(key)) key = stringLiteral(key.name);\n }\n\n return key;\n}\n\nexport function ensureBlock(\n this: NodePath<\n t.Loop | t.WithStatement | t.Function | t.LabeledStatement | t.CatchClause\n >,\n) {\n const body = this.get(\"body\");\n const bodyNode = body.node;\n\n if (Array.isArray(body)) {\n throw new Error(\"Can't convert array path to a block statement\");\n }\n if (!bodyNode) {\n throw new Error(\"Can't convert node without a body\");\n }\n\n if (body.isBlockStatement()) {\n return bodyNode;\n }\n\n const statements: Array<t.Statement> = [];\n\n let stringPath = \"body\";\n let key;\n let listKey;\n if (body.isStatement()) {\n listKey = \"body\";\n key = 0;\n statements.push(body.node);\n } else {\n stringPath += \".body.0\";\n if (this.isFunction()) {\n key = \"argument\";\n statements.push(returnStatement(body.node as t.Expression));\n } else {\n key = \"expression\";\n statements.push(expressionStatement(body.node as t.Expression));\n }\n }\n\n this.node.body = blockStatement(statements);\n const parentPath = this.get(stringPath) as NodePath;\n body.setup(\n parentPath,\n listKey\n ? // @ts-expect-error listKey must present in parent path\n parentPath.node[listKey]\n : parentPath.node,\n listKey,\n key,\n );\n\n return this.node;\n}\n\nif (!process.env.BABEL_8_BREAKING && !USE_ESM) {\n /**\n * Keeping this for backward-compatibility. You should use arrowFunctionToExpression() for >=7.x.\n */\n // eslint-disable-next-line no-restricted-globals\n exports.arrowFunctionToShadowed = function (this: NodePath) {\n if (!this.isArrowFunctionExpression()) return;\n\n this.arrowFunctionToExpression();\n };\n}\n\n/**\n * Given an arbitrary function, process its content as if it were an arrow function, moving references\n * to \"this\", \"arguments\", \"super\", and such into the function's parent scope. This method is useful if\n * you have wrapped some set of items in an IIFE or other function, but want \"this\", \"arguments\", and super\"\n * to continue behaving as expected.\n */\nexport function unwrapFunctionEnvironment(this: NodePath) {\n if (\n !this.isArrowFunctionExpression() &&\n !this.isFunctionExpression() &&\n !this.isFunctionDeclaration()\n ) {\n throw this.buildCodeFrameError(\n \"Can only unwrap the environment of a function.\",\n );\n }\n\n hoistFunctionEnvironment(this);\n}\n\nfunction setType<N extends t.Node, T extends N[\"type\"]>(\n path: NodePath<N>,\n type: T,\n): asserts path is NodePath<Extract<N, { type: T }>> {\n path.node.type = type;\n}\n\n/**\n * Convert a given arrow function into a normal ES5 function expression.\n */\nexport function arrowFunctionToExpression(\n this: NodePath<t.ArrowFunctionExpression>,\n {\n allowInsertArrow = true,\n allowInsertArrowWithRest = allowInsertArrow,\n noNewArrows = process.env.BABEL_8_BREAKING\n ? // TODO(Babel 8): Consider defaulting to `false` for spec compliance\n true\n : !arguments[0]?.specCompliant,\n }: {\n allowInsertArrow?: boolean | void;\n allowInsertArrowWithRest?: boolean | void;\n noNewArrows?: boolean;\n } = {},\n): NodePath<\n Exclude<t.Function, t.Method | t.ArrowFunctionExpression> | t.CallExpression\n> {\n if (!this.isArrowFunctionExpression()) {\n throw (this as NodePath).buildCodeFrameError(\n \"Cannot convert non-arrow function to a function expression.\",\n );\n }\n\n const { thisBinding, fnPath: fn } = hoistFunctionEnvironment(\n this,\n noNewArrows,\n allowInsertArrow,\n allowInsertArrowWithRest,\n );\n\n // @ts-expect-error TS requires explicit fn type annotation\n fn.ensureBlock();\n setType(fn, \"FunctionExpression\");\n\n if (!noNewArrows) {\n const checkBinding = thisBinding\n ? null\n : fn.scope.generateUidIdentifier(\"arrowCheckId\");\n if (checkBinding) {\n fn.parentPath.scope.push({\n id: checkBinding,\n init: objectExpression([]),\n });\n }\n\n fn.get(\"body\").unshiftContainer(\n \"body\",\n expressionStatement(\n callExpression(this.hub.addHelper(\"newArrowCheck\"), [\n thisExpression(),\n checkBinding\n ? identifier(checkBinding.name)\n : identifier(thisBinding),\n ]),\n ),\n );\n\n fn.replaceWith(\n callExpression(\n memberExpression(\n // @ts-expect-error TS can't infer nameFunction returns CallExpression | ArrowFunctionExpression here\n nameFunction(this, true) || fn.node,\n identifier(\"bind\"),\n ),\n [checkBinding ? identifier(checkBinding.name) : thisExpression()],\n ),\n );\n\n return fn.get(\"callee.object\");\n }\n\n return fn;\n}\n\nconst getSuperCallsVisitor = mergeVisitors<{\n allSuperCalls: NodePath<t.CallExpression>[];\n}>([\n {\n CallExpression(child, { allSuperCalls }) {\n if (!child.get(\"callee\").isSuper()) return;\n allSuperCalls.push(child);\n },\n },\n environmentVisitor,\n]);\n\n/**\n * Given a function, traverse its contents, and if there are references to \"this\", \"arguments\", \"super\",\n * or \"new.target\", ensure that these references reference the parent environment around this function.\n *\n * @returns `thisBinding`: the name of the injected reference to `this`; for example \"_this\"\n * @returns `fnPath`: the new path to the function node. This is different from the fnPath\n * parameter when the function node is wrapped in another node.\n */\nfunction hoistFunctionEnvironment(\n fnPath: NodePath<t.Function>,\n // TODO(Babel 8): Consider defaulting to `false` for spec compliance\n noNewArrows: boolean | void = true,\n allowInsertArrow: boolean | void = true,\n allowInsertArrowWithRest: boolean | void = true,\n): { thisBinding: string; fnPath: NodePath<t.Function> } {\n let arrowParent;\n let thisEnvFn: NodePath<t.Function> = fnPath.findParent(p => {\n if (p.isArrowFunctionExpression()) {\n arrowParent ??= p;\n return false;\n }\n return (\n p.isFunction() ||\n p.isProgram() ||\n p.isClassProperty({ static: false }) ||\n p.isClassPrivateProperty({ static: false })\n );\n }) as NodePath<t.Function>;\n const inConstructor = thisEnvFn.isClassMethod({ kind: \"constructor\" });\n\n if (thisEnvFn.isClassProperty() || thisEnvFn.isClassPrivateProperty()) {\n if (arrowParent) {\n thisEnvFn = arrowParent;\n } else if (allowInsertArrow) {\n // It's safe to wrap this function in another and not hoist to the\n // top level because the 'this' binding is constant in class\n // properties (since 'super()' has already been called), so we don't\n // need to capture/reassign it at the top level.\n fnPath.replaceWith(\n callExpression(\n arrowFunctionExpression([], toExpression(fnPath.node)),\n [],\n ),\n );\n thisEnvFn = fnPath.get(\"callee\") as NodePath<t.ArrowFunctionExpression>;\n fnPath = thisEnvFn.get(\"body\") as NodePath<t.FunctionExpression>;\n } else {\n throw fnPath.buildCodeFrameError(\n \"Unable to transform arrow inside class property\",\n );\n }\n }\n\n const { thisPaths, argumentsPaths, newTargetPaths, superProps, superCalls } =\n getScopeInformation(fnPath);\n\n // Convert all super() calls in the constructor, if super is used in an arrow.\n if (inConstructor && superCalls.length > 0) {\n if (!allowInsertArrow) {\n throw superCalls[0].buildCodeFrameError(\n \"When using '@babel/plugin-transform-arrow-functions', \" +\n \"it's not possible to compile `super()` in an arrow function without compiling classes.\\n\" +\n \"Please add '@babel/plugin-transform-classes' to your Babel configuration.\",\n );\n }\n if (!allowInsertArrowWithRest) {\n // preset-env with target `since 2017` enables `transform-parameters` without `transform-classes`.\n throw superCalls[0].buildCodeFrameError(\n \"When using '@babel/plugin-transform-parameters', \" +\n \"it's not possible to compile `super()` in an arrow function with default or rest parameters without compiling classes.\\n\" +\n \"Please add '@babel/plugin-transform-classes' to your Babel configuration.\",\n );\n }\n const allSuperCalls: NodePath<t.CallExpression>[] = [];\n thisEnvFn.traverse(getSuperCallsVisitor, { allSuperCalls });\n const superBinding = getSuperBinding(thisEnvFn);\n allSuperCalls.forEach(superCall => {\n const callee = identifier(superBinding);\n callee.loc = superCall.node.callee.loc;\n\n superCall.get(\"callee\").replaceWith(callee);\n });\n }\n\n // Convert all \"arguments\" references in the arrow to point at the alias.\n if (argumentsPaths.length > 0) {\n const argumentsBinding = getBinding(thisEnvFn, \"arguments\", () => {\n const args = () => identifier(\"arguments\");\n if (thisEnvFn.scope.path.isProgram()) {\n return conditionalExpression(\n binaryExpression(\n \"===\",\n unaryExpression(\"typeof\", args()),\n stringLiteral(\"undefined\"),\n ),\n thisEnvFn.scope.buildUndefinedNode(),\n args(),\n );\n } else {\n return args();\n }\n });\n\n argumentsPaths.forEach(argumentsChild => {\n const argsRef = identifier(argumentsBinding);\n argsRef.loc = argumentsChild.node.loc;\n\n argumentsChild.replaceWith(argsRef);\n });\n }\n\n // Convert all \"new.target\" references in the arrow to point at the alias.\n if (newTargetPaths.length > 0) {\n const newTargetBinding = getBinding(thisEnvFn, \"newtarget\", () =>\n metaProperty(identifier(\"new\"), identifier(\"target\")),\n );\n\n newTargetPaths.forEach(targetChild => {\n const targetRef = identifier(newTargetBinding);\n targetRef.loc = targetChild.node.loc;\n\n targetChild.replaceWith(targetRef);\n });\n }\n\n // Convert all \"super.prop\" references to point at aliases.\n if (superProps.length > 0) {\n if (!allowInsertArrow) {\n throw superProps[0].buildCodeFrameError(\n \"When using '@babel/plugin-transform-arrow-functions', \" +\n \"it's not possible to compile `super.prop` in an arrow function without compiling classes.\\n\" +\n \"Please add '@babel/plugin-transform-classes' to your Babel configuration.\",\n );\n }\n\n const flatSuperProps: NodePath<t.MemberExpression>[] = superProps.reduce(\n (acc, superProp) => acc.concat(standardizeSuperProperty(superProp)),\n [],\n );\n\n flatSuperProps.forEach(superProp => {\n const key = superProp.node.computed\n ? \"\"\n : // @ts-expect-error super property must not contain private name\n superProp.get(\"property\").node.name;\n\n const superParentPath = superProp.parentPath;\n\n const isAssignment = superParentPath.isAssignmentExpression({\n left: superProp.node,\n });\n const isCall = superParentPath.isCallExpression({\n callee: superProp.node,\n });\n const isTaggedTemplate = superParentPath.isTaggedTemplateExpression({\n tag: superProp.node,\n });\n const superBinding = getSuperPropBinding(thisEnvFn, isAssignment, key);\n\n const args: t.Expression[] = [];\n if (superProp.node.computed) {\n // SuperProperty must not be a private name\n args.push(superProp.get(\"property\").node as t.Expression);\n }\n\n if (isAssignment) {\n const value = superParentPath.node.right;\n args.push(value);\n }\n\n const call = callExpression(identifier(superBinding), args);\n\n if (isCall) {\n superParentPath.unshiftContainer(\"arguments\", thisExpression());\n superProp.replaceWith(memberExpression(call, identifier(\"call\")));\n\n thisPaths.push(\n superParentPath.get(\"arguments.0\") as NodePath<t.ThisExpression>,\n );\n } else if (isAssignment) {\n // Replace not only the super.prop, but the whole assignment\n superParentPath.replaceWith(call);\n } else if (isTaggedTemplate) {\n superProp.replaceWith(\n callExpression(memberExpression(call, identifier(\"bind\"), false), [\n thisExpression(),\n ]),\n );\n\n thisPaths.push(\n superProp.get(\"arguments.0\") as NodePath<t.ThisExpression>,\n );\n } else {\n superProp.replaceWith(call);\n }\n });\n }\n\n // Convert all \"this\" references in the arrow to point at the alias.\n let thisBinding: string | null;\n if (thisPaths.length > 0 || !noNewArrows) {\n thisBinding = getThisBinding(thisEnvFn, inConstructor);\n\n if (\n noNewArrows ||\n // In subclass constructors, still need to rewrite because \"this\" can't be bound in spec mode\n // because it might not have been initialized yet.\n (inConstructor && hasSuperClass(thisEnvFn))\n ) {\n thisPaths.forEach(thisChild => {\n const thisRef = thisChild.isJSX()\n ? jsxIdentifier(thisBinding)\n : identifier(thisBinding);\n\n thisRef.loc = thisChild.node.loc;\n thisChild.replaceWith(thisRef);\n });\n\n if (!noNewArrows) thisBinding = null;\n }\n }\n\n return { thisBinding, fnPath };\n}\n\ntype LogicalOp = Parameters<typeof logicalExpression>[0];\ntype BinaryOp = Parameters<typeof binaryExpression>[0];\n\nfunction isLogicalOp(op: string): op is LogicalOp {\n return LOGICAL_OPERATORS.includes(op);\n}\n\nfunction standardizeSuperProperty(\n superProp: NodePath<t.MemberExpression>,\n):\n | [NodePath<t.MemberExpression>]\n | [NodePath<t.MemberExpression>, NodePath<t.MemberExpression>] {\n if (\n superProp.parentPath.isAssignmentExpression() &&\n superProp.parentPath.node.operator !== \"=\"\n ) {\n const assignmentPath = superProp.parentPath;\n\n const op = assignmentPath.node.operator.slice(0, -1) as\n | LogicalOp\n | BinaryOp;\n\n const value = assignmentPath.node.right;\n\n const isLogicalAssignment = isLogicalOp(op);\n\n if (superProp.node.computed) {\n // from: super[foo] **= 4;\n // to: super[tmp = foo] = super[tmp] ** 4;\n\n // from: super[foo] ??= 4;\n // to: super[tmp = foo] ?? super[tmp] = 4;\n\n const tmp = superProp.scope.generateDeclaredUidIdentifier(\"tmp\");\n\n const object = superProp.node.object;\n const property = superProp.node.property as t.Expression;\n\n assignmentPath\n .get(\"left\")\n .replaceWith(\n memberExpression(\n object,\n assignmentExpression(\"=\", tmp, property),\n true /* computed */,\n ),\n );\n\n assignmentPath\n .get(\"right\")\n .replaceWith(\n rightExpression(\n isLogicalAssignment ? \"=\" : op,\n memberExpression(object, identifier(tmp.name), true /* computed */),\n value,\n ),\n );\n } else {\n // from: super.foo **= 4;\n // to: super.foo = super.foo ** 4;\n\n // from: super.foo ??= 4;\n // to: super.foo ?? super.foo = 4;\n\n const object = superProp.node.object;\n const property = superProp.node.property as t.Identifier;\n\n assignmentPath\n .get(\"left\")\n .replaceWith(memberExpression(object, property));\n\n assignmentPath\n .get(\"right\")\n .replaceWith(\n rightExpression(\n isLogicalAssignment ? \"=\" : op,\n memberExpression(object, identifier(property.name)),\n value,\n ),\n );\n }\n\n if (isLogicalAssignment) {\n assignmentPath.replaceWith(\n logicalExpression(\n op,\n assignmentPath.node.left as t.MemberExpression,\n assignmentPath.node.right,\n ),\n );\n } else {\n assignmentPath.node.operator = \"=\";\n }\n\n return [\n assignmentPath.get(\"left\") as NodePath<t.MemberExpression>,\n assignmentPath.get(\"right\").get(\"left\"),\n ];\n } else if (superProp.parentPath.isUpdateExpression()) {\n const updateExpr = superProp.parentPath;\n\n const tmp = superProp.scope.generateDeclaredUidIdentifier(\"tmp\");\n const computedKey = superProp.node.computed\n ? superProp.scope.generateDeclaredUidIdentifier(\"prop\")\n : null;\n\n const parts: t.Expression[] = [\n assignmentExpression(\n \"=\",\n tmp,\n memberExpression(\n superProp.node.object,\n computedKey\n ? assignmentExpression(\n \"=\",\n computedKey,\n superProp.node.property as t.Expression,\n )\n : superProp.node.property,\n superProp.node.computed,\n ),\n ),\n assignmentExpression(\n \"=\",\n memberExpression(\n superProp.node.object,\n computedKey ? identifier(computedKey.name) : superProp.node.property,\n superProp.node.computed,\n ),\n binaryExpression(\n // map `++` to `+`, and `--` to `-`\n superProp.parentPath.node.operator[0] as \"+\" | \"-\",\n identifier(tmp.name),\n numericLiteral(1),\n ),\n ),\n ];\n\n if (!superProp.parentPath.node.prefix) {\n parts.push(identifier(tmp.name));\n }\n\n updateExpr.replaceWith(sequenceExpression(parts));\n\n const left = updateExpr.get(\n \"expressions.0.right\",\n ) as NodePath<t.MemberExpression>;\n const right = updateExpr.get(\n \"expressions.1.left\",\n ) as NodePath<t.MemberExpression>;\n return [left, right];\n }\n\n return [superProp];\n\n function rightExpression(\n op: BinaryOp | \"=\",\n left: t.MemberExpression,\n right: t.Expression,\n ) {\n if (op === 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super.foo\n fnBody = memberExpression(_super(), identifier(propName));\n } else {\n const method = thisEnvFn.scope.generateUidIdentifier(\"prop\");\n // (method) => super[method]\n argsList.unshift(method);\n fnBody = memberExpression(\n _super(),\n identifier(method.name),\n true /* computed */,\n );\n }\n\n if (isAssignment) {\n const valueIdent = thisEnvFn.scope.generateUidIdentifier(\"value\");\n argsList.push(valueIdent);\n\n fnBody = assignmentExpression(\"=\", fnBody, identifier(valueIdent.name));\n }\n\n return arrowFunctionExpression(argsList, fnBody);\n });\n}\n\nfunction getBinding(\n thisEnvFn: NodePath,\n key: string,\n init: (name: string) => t.Expression,\n) {\n const cacheKey = \"binding:\" + key;\n let data: string | undefined = thisEnvFn.getData(cacheKey);\n if (!data) {\n const id = thisEnvFn.scope.generateUidIdentifier(key);\n data = id.name;\n thisEnvFn.setData(cacheKey, data);\n\n thisEnvFn.scope.push({\n id: id,\n init: init(data),\n });\n }\n\n return 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