398 lines
12 KiB
JavaScript
398 lines
12 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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var _t = require('@babel/types');
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function _interopNamespace(e) {
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if (e && e.__esModule) return e;
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var n = Object.create(null);
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if (e) {
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Object.keys(e).forEach(function (k) {
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if (k !== 'default') {
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var d = Object.getOwnPropertyDescriptor(e, k);
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Object.defineProperty(n, k, d.get ? d : {
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enumerable: true,
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get: function () { return e[k]; }
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});
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}
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});
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}
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n.default = e;
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return Object.freeze(n);
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}
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var _t__namespace = /*#__PURE__*/_interopNamespace(_t);
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function willPathCastToBoolean(path) {
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const maybeWrapped = path;
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const {
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node,
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parentPath
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} = maybeWrapped;
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if (parentPath.isLogicalExpression()) {
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const {
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operator,
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right
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} = parentPath.node;
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if (operator === "&&" || operator === "||" || operator === "??" && node === right) {
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return willPathCastToBoolean(parentPath);
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}
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}
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if (parentPath.isSequenceExpression()) {
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const {
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expressions
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} = parentPath.node;
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if (expressions[expressions.length - 1] === node) {
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return willPathCastToBoolean(parentPath);
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} else {
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return true;
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}
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}
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return parentPath.isConditional({
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test: node
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}) || parentPath.isUnaryExpression({
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operator: "!"
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}) || parentPath.isLoop({
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test: node
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});
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}
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const {
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LOGICAL_OPERATORS,
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arrowFunctionExpression,
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assignmentExpression,
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binaryExpression,
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booleanLiteral,
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callExpression,
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cloneNode,
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conditionalExpression,
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identifier,
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isMemberExpression,
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isOptionalCallExpression,
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isOptionalMemberExpression,
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isUpdateExpression,
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logicalExpression,
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memberExpression,
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nullLiteral,
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optionalCallExpression,
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optionalMemberExpression,
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sequenceExpression,
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updateExpression
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} = _t__namespace;
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class AssignmentMemoiser {
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constructor() {
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this._map = void 0;
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this._map = new WeakMap();
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}
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has(key) {
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return this._map.has(key);
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}
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get(key) {
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if (!this.has(key)) return;
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const record = this._map.get(key);
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const {
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value
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} = record;
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record.count--;
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if (record.count === 0) {
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return assignmentExpression("=", value, key);
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}
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return value;
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}
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set(key, value, count) {
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return this._map.set(key, {
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count,
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value
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});
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}
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}
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function toNonOptional(path, base) {
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const {
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node
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} = path;
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if (isOptionalMemberExpression(node)) {
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return memberExpression(base, node.property, node.computed);
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}
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if (path.isOptionalCallExpression()) {
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const callee = path.get("callee");
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if (path.node.optional && callee.isOptionalMemberExpression()) {
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const object = callee.node.object;
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const context = path.scope.maybeGenerateMemoised(object);
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callee.get("object").replaceWith(assignmentExpression("=", context, object));
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return callExpression(memberExpression(base, identifier("call")), [context, ...path.node.arguments]);
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}
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return callExpression(base, path.node.arguments);
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}
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return path.node;
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}
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function isInDetachedTree(path) {
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while (path) {
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if (path.isProgram()) break;
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const {
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parentPath,
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container,
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listKey
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} = path;
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const parentNode = parentPath.node;
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if (listKey) {
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if (container !== parentNode[listKey]) {
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return true;
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}
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} else {
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if (container !== parentNode) return true;
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}
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path = parentPath;
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}
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return false;
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}
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const handle = {
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memoise() {},
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handle(member, noDocumentAll) {
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const {
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node,
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parent,
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parentPath,
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scope
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} = member;
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if (member.isOptionalMemberExpression()) {
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if (isInDetachedTree(member)) return;
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const endPath = member.find(({
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node,
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parent
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}) => {
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if (isOptionalMemberExpression(parent)) {
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return parent.optional || parent.object !== node;
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}
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if (isOptionalCallExpression(parent)) {
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return node !== member.node && parent.optional || parent.callee !== node;
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}
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return true;
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});
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if (scope.path.isPattern()) {
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endPath.replaceWith(callExpression(arrowFunctionExpression([], endPath.node), []));
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return;
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}
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const willEndPathCastToBoolean = willPathCastToBoolean(endPath);
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const rootParentPath = endPath.parentPath;
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if (rootParentPath.isUpdateExpression({
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argument: node
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})) {
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throw member.buildCodeFrameError(`can't handle update expression`);
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}
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const isAssignment = rootParentPath.isAssignmentExpression({
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left: endPath.node
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});
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const isDeleteOperation = rootParentPath.isUnaryExpression({
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operator: "delete"
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});
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if (isDeleteOperation && endPath.isOptionalMemberExpression() && endPath.get("property").isPrivateName()) {
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throw member.buildCodeFrameError(`can't delete a private class element`);
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}
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let startingOptional = member;
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for (;;) {
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if (startingOptional.isOptionalMemberExpression()) {
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if (startingOptional.node.optional) break;
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startingOptional = startingOptional.get("object");
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continue;
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} else if (startingOptional.isOptionalCallExpression()) {
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if (startingOptional.node.optional) break;
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startingOptional = startingOptional.get("callee");
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continue;
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}
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throw new Error(`Internal error: unexpected ${startingOptional.node.type}`);
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}
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const startingNode = startingOptional.isOptionalMemberExpression() ? startingOptional.node.object : startingOptional.node.callee;
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const baseNeedsMemoised = scope.maybeGenerateMemoised(startingNode);
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const baseRef = baseNeedsMemoised != null ? baseNeedsMemoised : startingNode;
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const parentIsOptionalCall = parentPath.isOptionalCallExpression({
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callee: node
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});
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const isOptionalCall = parent => parentIsOptionalCall;
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const parentIsCall = parentPath.isCallExpression({
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callee: node
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});
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startingOptional.replaceWith(toNonOptional(startingOptional, baseRef));
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if (isOptionalCall()) {
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if (parent.optional) {
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parentPath.replaceWith(this.optionalCall(member, parent.arguments));
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} else {
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parentPath.replaceWith(this.call(member, parent.arguments));
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}
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} else if (parentIsCall) {
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member.replaceWith(this.boundGet(member));
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} else if (this.delete && parentPath.isUnaryExpression({
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operator: "delete"
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})) {
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parentPath.replaceWith(this.delete(member));
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} else if (parentPath.isAssignmentExpression()) {
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handleAssignment(this, member, parentPath);
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} else {
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member.replaceWith(this.get(member));
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}
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let regular = member.node;
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for (let current = member; current !== endPath;) {
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const parentPath = current.parentPath;
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if (parentPath === endPath && isOptionalCall() && parent.optional) {
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regular = parentPath.node;
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break;
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}
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regular = toNonOptional(parentPath, regular);
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current = parentPath;
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}
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let context;
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const endParentPath = endPath.parentPath;
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if (isMemberExpression(regular) && endParentPath.isOptionalCallExpression({
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callee: endPath.node,
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optional: true
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})) {
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const {
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object
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} = regular;
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context = member.scope.maybeGenerateMemoised(object);
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if (context) {
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regular.object = assignmentExpression("=", context, object);
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}
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}
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let replacementPath = endPath;
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if (isDeleteOperation || isAssignment) {
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replacementPath = endParentPath;
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regular = endParentPath.node;
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}
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const baseMemoised = baseNeedsMemoised ? assignmentExpression("=", cloneNode(baseRef), cloneNode(startingNode)) : cloneNode(baseRef);
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if (willEndPathCastToBoolean) {
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let nonNullishCheck;
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if (noDocumentAll) {
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nonNullishCheck = binaryExpression("!=", baseMemoised, nullLiteral());
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} else {
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nonNullishCheck = logicalExpression("&&", binaryExpression("!==", baseMemoised, nullLiteral()), binaryExpression("!==", cloneNode(baseRef), scope.buildUndefinedNode()));
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}
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replacementPath.replaceWith(logicalExpression("&&", nonNullishCheck, regular));
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} else {
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let nullishCheck;
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if (noDocumentAll) {
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nullishCheck = binaryExpression("==", baseMemoised, nullLiteral());
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} else {
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nullishCheck = logicalExpression("||", binaryExpression("===", baseMemoised, nullLiteral()), binaryExpression("===", cloneNode(baseRef), scope.buildUndefinedNode()));
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}
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replacementPath.replaceWith(conditionalExpression(nullishCheck, isDeleteOperation ? booleanLiteral(true) : scope.buildUndefinedNode(), regular));
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}
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if (context) {
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const endParent = endParentPath.node;
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endParentPath.replaceWith(optionalCallExpression(optionalMemberExpression(endParent.callee, identifier("call"), false, true), [cloneNode(context), ...endParent.arguments], false));
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}
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return;
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}
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if (isUpdateExpression(parent, {
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argument: node
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})) {
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if (this.simpleSet) {
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member.replaceWith(this.simpleSet(member));
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return;
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}
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const {
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operator,
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prefix
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} = parent;
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this.memoise(member, 2);
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const ref = scope.generateUidIdentifierBasedOnNode(node);
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scope.push({
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id: ref
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});
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const seq = [assignmentExpression("=", cloneNode(ref), this.get(member))];
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if (prefix) {
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seq.push(updateExpression(operator, cloneNode(ref), prefix));
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const value = sequenceExpression(seq);
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parentPath.replaceWith(this.set(member, value));
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return;
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} else {
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const ref2 = scope.generateUidIdentifierBasedOnNode(node);
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scope.push({
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id: ref2
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});
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seq.push(assignmentExpression("=", cloneNode(ref2), updateExpression(operator, cloneNode(ref), prefix)), cloneNode(ref));
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const value = sequenceExpression(seq);
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parentPath.replaceWith(sequenceExpression([this.set(member, value), cloneNode(ref2)]));
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return;
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}
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}
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if (parentPath.isAssignmentExpression({
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left: node
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})) {
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handleAssignment(this, member, parentPath);
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return;
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}
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if (parentPath.isCallExpression({
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callee: node
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})) {
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parentPath.replaceWith(this.call(member, parentPath.node.arguments));
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return;
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}
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if (parentPath.isOptionalCallExpression({
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callee: node
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})) {
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if (scope.path.isPattern()) {
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parentPath.replaceWith(callExpression(arrowFunctionExpression([], parentPath.node), []));
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return;
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}
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parentPath.replaceWith(this.optionalCall(member, parentPath.node.arguments));
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return;
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}
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if (this.delete && parentPath.isUnaryExpression({
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operator: "delete"
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})) {
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parentPath.replaceWith(this.delete(member));
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return;
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}
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if (parentPath.isForXStatement({
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left: node
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}) || parentPath.isObjectProperty({
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value: node
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}) && parentPath.parentPath.isObjectPattern() || parentPath.isAssignmentPattern({
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left: node
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}) && parentPath.parentPath.isObjectProperty({
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value: parent
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}) && parentPath.parentPath.parentPath.isObjectPattern() || parentPath.isArrayPattern() || parentPath.isAssignmentPattern({
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left: node
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}) && parentPath.parentPath.isArrayPattern() || parentPath.isRestElement()) {
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member.replaceWith(this.destructureSet(member));
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return;
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}
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if (parentPath.isTaggedTemplateExpression()) {
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member.replaceWith(this.boundGet(member));
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} else {
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member.replaceWith(this.get(member));
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}
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}
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};
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function handleAssignment(state, member, parentPath) {
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if (state.simpleSet) {
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member.replaceWith(state.simpleSet(member));
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return;
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}
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const {
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operator,
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right: value
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} = parentPath.node;
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if (operator === "=") {
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parentPath.replaceWith(state.set(member, value));
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} else {
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const operatorTrunc = operator.slice(0, -1);
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if (LOGICAL_OPERATORS.includes(operatorTrunc)) {
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state.memoise(member, 1);
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parentPath.replaceWith(logicalExpression(operatorTrunc, state.get(member), state.set(member, value)));
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} else {
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state.memoise(member, 2);
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parentPath.replaceWith(state.set(member, binaryExpression(operatorTrunc, state.get(member), value)));
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}
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}
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}
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function memberExpressionToFunctions(path, visitor, state) {
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path.traverse(visitor, Object.assign({}, handle, state, {
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memoiser: new AssignmentMemoiser()
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}));
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}
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exports.default = memberExpressionToFunctions;
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//# sourceMappingURL=index.js.map
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