Improve code quality and write tests

node_modules/@babel/helper-replace-supers/lib/index.js

@@ -0,0 +1,241 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = exports.environmentVisitor = void 0;
+
+function _traverse() {
+  const data = _interopRequireDefault(require("@babel/traverse"));
+
+  _traverse = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _helperMemberExpressionToFunctions() {
+  const data = _interopRequireDefault(require("@babel/helper-member-expression-to-functions"));
+
+  _helperMemberExpressionToFunctions = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _helperOptimiseCallExpression() {
+  const data = _interopRequireDefault(require("@babel/helper-optimise-call-expression"));
+
+  _helperOptimiseCallExpression = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function t() {
+  const data = _interopRequireWildcard(require("@babel/types"));
+
+  t = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function getPrototypeOfExpression(objectRef, isStatic, file, isPrivateMethod) {
+  objectRef = t().cloneNode(objectRef);
+  const targetRef = isStatic || isPrivateMethod ? objectRef : t().memberExpression(objectRef, t().identifier("prototype"));
+  return t().callExpression(file.addHelper("getPrototypeOf"), [targetRef]);
+}
+
+function skipAllButComputedKey(path) {
+  if (!path.node.computed) {
+    path.skip();
+    return;
+  }
+
+  const keys = t().VISITOR_KEYS[path.type];
+
+  for (const key of keys) {
+    if (key !== "key") path.skipKey(key);
+  }
+}
+
+const environmentVisitor = {
+  TypeAnnotation(path) {
+    path.skip();
+  },
+
+  Function(path) {
+    if (path.isMethod()) return;
+    if (path.isArrowFunctionExpression()) return;
+    path.skip();
+  },
+
+  "Method|ClassProperty|ClassPrivateProperty"(path) {
+    skipAllButComputedKey(path);
+  }
+
+};
+exports.environmentVisitor = environmentVisitor;
+
+const visitor = _traverse().default.visitors.merge([environmentVisitor, {
+  Super(path, state) {
+    const {
+      node,
+      parentPath
+    } = path;
+    if (!parentPath.isMemberExpression({
+      object: node
+    })) return;
+    state.handle(parentPath);
+  }
+
+}]);
+
+const specHandlers = {
+  memoise(superMember, count) {
+    const {
+      scope,
+      node
+    } = superMember;
+    const {
+      computed,
+      property
+    } = node;
+
+    if (!computed) {
+      return;
+    }
+
+    const memo = scope.maybeGenerateMemoised(property);
+
+    if (!memo) {
+      return;
+    }
+
+    this.memoiser.set(property, memo, count);
+  },
+
+  prop(superMember) {
+    const {
+      computed,
+      property
+    } = superMember.node;
+
+    if (this.memoiser.has(property)) {
+      return t().cloneNode(this.memoiser.get(property));
+    }
+
+    if (computed) {
+      return t().cloneNode(property);
+    }
+
+    return t().stringLiteral(property.name);
+  },
+
+  get(superMember) {
+    return t().callExpression(this.file.addHelper("get"), [getPrototypeOfExpression(this.getObjectRef(), this.isStatic, this.file, this.isPrivateMethod), this.prop(superMember), t().thisExpression()]);
+  },
+
+  set(superMember, value) {
+    return t().callExpression(this.file.addHelper("set"), [getPrototypeOfExpression(this.getObjectRef(), this.isStatic, this.file, this.isPrivateMethod), this.prop(superMember), value, t().thisExpression(), t().booleanLiteral(superMember.isInStrictMode())]);
+  },
+
+  destructureSet(superMember) {
+    throw superMember.buildCodeFrameError(`Destructuring to a super field is not supported yet.`);
+  },
+
+  call(superMember, args) {
+    return (0, _helperOptimiseCallExpression().default)(this.get(superMember), t().thisExpression(), args);
+  }
+
+};
+const looseHandlers = Object.assign({}, specHandlers, {
+  prop(superMember) {
+    const {
+      property
+    } = superMember.node;
+
+    if (this.memoiser.has(property)) {
+      return t().cloneNode(this.memoiser.get(property));
+    }
+
+    return t().cloneNode(property);
+  },
+
+  get(superMember) {
+    const {
+      isStatic,
+      superRef
+    } = this;
+    const {
+      computed
+    } = superMember.node;
+    const prop = this.prop(superMember);
+    let object;
+
+    if (isStatic) {
+      object = superRef ? t().cloneNode(superRef) : t().memberExpression(t().identifier("Function"), t().identifier("prototype"));
+    } else {
+      object = superRef ? t().memberExpression(t().cloneNode(superRef), t().identifier("prototype")) : t().memberExpression(t().identifier("Object"), t().identifier("prototype"));
+    }
+
+    return t().memberExpression(object, prop, computed);
+  },
+
+  set(superMember, value) {
+    const {
+      computed
+    } = superMember.node;
+    const prop = this.prop(superMember);
+    return t().assignmentExpression("=", t().memberExpression(t().thisExpression(), prop, computed), value);
+  },
+
+  destructureSet(superMember) {
+    const {
+      computed
+    } = superMember.node;
+    const prop = this.prop(superMember);
+    return t().memberExpression(t().thisExpression(), prop, computed);
+  }
+
+});
+
+class ReplaceSupers {
+  constructor(opts) {
+    const path = opts.methodPath;
+    this.methodPath = path;
+    this.isStatic = path.isObjectMethod() || path.node.static;
+    this.isPrivateMethod = path.isPrivate() && path.isMethod();
+    this.file = opts.file;
+    this.superRef = opts.superRef;
+    this.isLoose = opts.isLoose;
+    this.opts = opts;
+  }
+
+  getObjectRef() {
+    return t().cloneNode(this.opts.objectRef || this.opts.getObjectRef());
+  }
+
+  replace() {
+    const handler = this.isLoose ? looseHandlers : specHandlers;
+    (0, _helperMemberExpressionToFunctions().default)(this.methodPath, visitor, Object.assign({
+      file: this.file,
+      isStatic: this.isStatic,
+      isPrivateMethod: this.isPrivateMethod,
+      getObjectRef: this.getObjectRef.bind(this),
+      superRef: this.superRef
+    }, handler));
+  }
+
+}
+
+exports.default = ReplaceSupers;