Sha256: 2721a2d849222124f42e317134fbd33a031b7612f417e90671ddaa36821b676e
Contents?: true
Size: 1.55 KB
Versions: 7
Compression:
Stored size: 1.55 KB
Contents
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _helperPluginUtils = require("@babel/helper-plugin-utils");
var _pluginSyntaxNullishCoalescingOperator = _interopRequireDefault(require("@babel/plugin-syntax-nullish-coalescing-operator"));
var _core = require("@babel/core");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var _default = (0, _helperPluginUtils.declare)((api, {
loose = false
}) => {
api.assertVersion(7);
return {
name: "proposal-nullish-coalescing-operator",
inherits: _pluginSyntaxNullishCoalescingOperator.default,
visitor: {
LogicalExpression(path) {
const {
node,
scope
} = path;
if (node.operator !== "??") {
return;
}
let ref = scope.maybeGenerateMemoised(node.left);
let assignment;
if (ref === null) {
ref = node.left;
assignment = _core.types.cloneNode(node.left);
} else {
assignment = _core.types.assignmentExpression("=", ref, node.left);
}
path.replaceWith(_core.types.conditionalExpression(loose ? _core.types.binaryExpression("!=", assignment, _core.types.nullLiteral()) : _core.types.logicalExpression("&&", _core.types.binaryExpression("!==", assignment, _core.types.nullLiteral()), _core.types.binaryExpression("!==", _core.types.cloneNode(ref), scope.buildUndefinedNode())), _core.types.cloneNode(ref), node.right));
}
}
};
});
exports.default = _default;
Version data entries
7 entries across 7 versions & 4 rubygems