WIP - add extractor, generate snippet_data

node_modules/@babel/plugin-proposal-optional-chaining/lib/index.js

@@ -0,0 +1,135 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+function _helperPluginUtils() {
+  const data = require("@babel/helper-plugin-utils");
+
+  _helperPluginUtils = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _pluginSyntaxOptionalChaining() {
+  const data = _interopRequireDefault(require("@babel/plugin-syntax-optional-chaining"));
+
+  _pluginSyntaxOptionalChaining = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _core() {
+  const data = require("@babel/core");
+
+  _core = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var _default = (0, _helperPluginUtils().declare)((api, options) => {
+  api.assertVersion(7);
+  const {
+    loose = false
+  } = options;
+  return {
+    name: "proposal-optional-chaining",
+    inherits: _pluginSyntaxOptionalChaining().default,
+    visitor: {
+      "OptionalCallExpression|OptionalMemberExpression"(path) {
+        const {
+          parentPath,
+          scope
+        } = path;
+        const optionals = [];
+        let optionalPath = path;
+
+        while (optionalPath.isOptionalMemberExpression() || optionalPath.isOptionalCallExpression()) {
+          const {
+            node
+          } = optionalPath;
+
+          if (node.optional) {
+            optionals.push(node);
+          }
+
+          if (optionalPath.isOptionalMemberExpression()) {
+            optionalPath.node.type = "MemberExpression";
+            optionalPath = optionalPath.get("object");
+          } else if (optionalPath.isOptionalCallExpression()) {
+            optionalPath.node.type = "CallExpression";
+            optionalPath = optionalPath.get("callee");
+          }
+        }
+
+        let replacementPath = path;
+
+        if (parentPath.isUnaryExpression({
+          operator: "delete"
+        })) {
+          replacementPath = parentPath;
+        }
+
+        for (let i = optionals.length - 1; i >= 0; i--) {
+          const node = optionals[i];
+
+          const isCall = _core().types.isCallExpression(node);
+
+          const replaceKey = isCall ? "callee" : "object";
+          const chain = node[replaceKey];
+          let ref;
+          let check;
+
+          if (loose && isCall) {
+            check = ref = chain;
+          } else {
+            ref = scope.maybeGenerateMemoised(chain);
+
+            if (ref) {
+              check = _core().types.assignmentExpression("=", _core().types.cloneNode(ref), chain);
+              node[replaceKey] = ref;
+            } else {
+              check = ref = chain;
+            }
+          }
+
+          if (isCall && _core().types.isMemberExpression(chain)) {
+            if (loose) {
+              node.callee = chain;
+            } else {
+              const {
+                object
+              } = chain;
+              let context = scope.maybeGenerateMemoised(object);
+
+              if (context) {
+                chain.object = _core().types.assignmentExpression("=", context, object);
+              } else {
+                context = object;
+              }
+
+              node.arguments.unshift(_core().types.cloneNode(context));
+              node.callee = _core().types.memberExpression(node.callee, _core().types.identifier("call"));
+            }
+          }
+
+          replacementPath.replaceWith(_core().types.conditionalExpression(loose ? _core().types.binaryExpression("==", _core().types.cloneNode(check), _core().types.nullLiteral()) : _core().types.logicalExpression("||", _core().types.binaryExpression("===", _core().types.cloneNode(check), _core().types.nullLiteral()), _core().types.binaryExpression("===", _core().types.cloneNode(ref), scope.buildUndefinedNode())), scope.buildUndefinedNode(), replacementPath.node));
+          replacementPath = replacementPath.get("alternate");
+        }
+      }
+
+    }
+  };
+});
+
+exports.default = _default;