feat:node-modules

node_modules/mathjs/lib/cjs/expression/node/AccessorNode.js

@@ -0,0 +1,196 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createAccessorNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _customs = require("../../utils/customs.js");
+var _factory = require("../../utils/factory.js");
+var _access = require("./utils/access.js");
+const name = 'AccessorNode';
+const dependencies = ['subset', 'Node'];
+const createAccessorNode = exports.createAccessorNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    subset,
+    Node
+  } = _ref;
+  const access = (0, _access.accessFactory)({
+    subset
+  });
+
+  /**
+   * Are parenthesis needed?
+   * @private
+   */
+  function needParenthesis(node) {
+    // TODO: maybe make a method on the nodes which tells whether they need parenthesis?
+    return !((0, _is.isAccessorNode)(node) || (0, _is.isArrayNode)(node) || (0, _is.isConstantNode)(node) || (0, _is.isFunctionNode)(node) || (0, _is.isObjectNode)(node) || (0, _is.isParenthesisNode)(node) || (0, _is.isSymbolNode)(node));
+  }
+  class AccessorNode extends Node {
+    /**
+     * @constructor AccessorNode
+     * @extends {Node}
+     * Access an object property or get a matrix subset
+     *
+     * @param {Node} object                 The object from which to retrieve
+     *                                      a property or subset.
+     * @param {IndexNode} index             IndexNode containing ranges
+     */
+    constructor(object, index) {
+      super();
+      if (!(0, _is.isNode)(object)) {
+        throw new TypeError('Node expected for parameter "object"');
+      }
+      if (!(0, _is.isIndexNode)(index)) {
+        throw new TypeError('IndexNode expected for parameter "index"');
+      }
+      this.object = object;
+      this.index = index;
+    }
+
+    // readonly property name
+    get name() {
+      if (this.index) {
+        return this.index.isObjectProperty() ? this.index.getObjectProperty() : '';
+      } else {
+        return this.object.name || '';
+      }
+    }
+    get type() {
+      return name;
+    }
+    get isAccessorNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const evalObject = this.object._compile(math, argNames);
+      const evalIndex = this.index._compile(math, argNames);
+      if (this.index.isObjectProperty()) {
+        const prop = this.index.getObjectProperty();
+        return function evalAccessorNode(scope, args, context) {
+          // get a property from an object evaluated using the scope.
+          return (0, _customs.getSafeProperty)(evalObject(scope, args, context), prop);
+        };
+      } else {
+        return function evalAccessorNode(scope, args, context) {
+          const object = evalObject(scope, args, context);
+          // we pass just object here instead of context:
+          const index = evalIndex(scope, args, object);
+          return access(object, index);
+        };
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.object, 'object', this);
+      callback(this.index, 'index', this);
+    }
+
+    /**
+     * Create a new AccessorNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {AccessorNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      return new AccessorNode(this._ifNode(callback(this.object, 'object', this)), this._ifNode(callback(this.index, 'index', this)));
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {AccessorNode}
+     */
+    clone() {
+      return new AccessorNode(this.object, this.index);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string}
+     */
+    _toString(options) {
+      let object = this.object.toString(options);
+      if (needParenthesis(this.object)) {
+        object = '(' + object + ')';
+      }
+      return object + this.index.toString(options);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string}
+     */
+    _toHTML(options) {
+      let object = this.object.toHTML(options);
+      if (needParenthesis(this.object)) {
+        object = '<span class="math-parenthesis math-round-parenthesis">(</span>' + object + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      return object + this.index.toHTML(options);
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string}
+     */
+    _toTex(options) {
+      let object = this.object.toTex(options);
+      if (needParenthesis(this.object)) {
+        object = '\\left(\' + object + \'\\right)';
+      }
+      return object + this.index.toTex(options);
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        object: this.object,
+        index: this.index
+      };
+    }
+
+    /**
+     * Instantiate an AccessorNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     `{"mathjs": "AccessorNode", object: ..., index: ...}`,
+     *     where mathjs is optional
+     * @returns {AccessorNode}
+     */
+    static fromJSON(json) {
+      return new AccessorNode(json.object, json.index);
+    }
+  }
+  (0, _defineProperty2.default)(AccessorNode, "name", name);
+  return AccessorNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/ArrayNode.js

@@ -0,0 +1,183 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createArrayNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _array = require("../../utils/array.js");
+var _factory = require("../../utils/factory.js");
+const name = 'ArrayNode';
+const dependencies = ['Node'];
+const createArrayNode = exports.createArrayNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  class ArrayNode extends Node {
+    /**
+     * @constructor ArrayNode
+     * @extends {Node}
+     * Holds an 1-dimensional array with items
+     * @param {Node[]} [items]   1 dimensional array with items
+     */
+    constructor(items) {
+      super();
+      this.items = items || [];
+
+      // validate input
+      if (!Array.isArray(this.items) || !this.items.every(_is.isNode)) {
+        throw new TypeError('Array containing Nodes expected');
+      }
+    }
+    get type() {
+      return name;
+    }
+    get isArrayNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const evalItems = (0, _array.map)(this.items, function (item) {
+        return item._compile(math, argNames);
+      });
+      const asMatrix = math.config.matrix !== 'Array';
+      if (asMatrix) {
+        const matrix = math.matrix;
+        return function evalArrayNode(scope, args, context) {
+          return matrix((0, _array.map)(evalItems, function (evalItem) {
+            return evalItem(scope, args, context);
+          }));
+        };
+      } else {
+        return function evalArrayNode(scope, args, context) {
+          return (0, _array.map)(evalItems, function (evalItem) {
+            return evalItem(scope, args, context);
+          });
+        };
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      for (let i = 0; i < this.items.length; i++) {
+        const node = this.items[i];
+        callback(node, 'items[' + i + ']', this);
+      }
+    }
+
+    /**
+     * Create a new ArrayNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {ArrayNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const items = [];
+      for (let i = 0; i < this.items.length; i++) {
+        items[i] = this._ifNode(callback(this.items[i], 'items[' + i + ']', this));
+      }
+      return new ArrayNode(items);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {ArrayNode}
+     */
+    clone() {
+      return new ArrayNode(this.items.slice(0));
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toString(options) {
+      const items = this.items.map(function (node) {
+        return node.toString(options);
+      });
+      return '[' + items.join(', ') + ']';
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        items: this.items
+      };
+    }
+
+    /**
+     * Instantiate an ArrayNode from its JSON representation
+     * @param {Object} json  An object structured like
+     *                       `{"mathjs": "ArrayNode", items: [...]}`,
+     *                       where mathjs is optional
+     * @returns {ArrayNode}
+     */
+    static fromJSON(json) {
+      return new ArrayNode(json.items);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toHTML(options) {
+      const items = this.items.map(function (node) {
+        return node.toHTML(options);
+      });
+      return '<span class="math-parenthesis math-square-parenthesis">[</span>' + items.join('<span class="math-separator">,</span>') + '<span class="math-parenthesis math-square-parenthesis">]</span>';
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      function itemsToTex(items, nested) {
+        const mixedItems = items.some(_is.isArrayNode) && !items.every(_is.isArrayNode);
+        const itemsFormRow = nested || mixedItems;
+        const itemSep = itemsFormRow ? '&' : '\\\\';
+        const itemsTex = items.map(function (node) {
+          if (node.items) {
+            return itemsToTex(node.items, !nested);
+          } else {
+            return node.toTex(options);
+          }
+        }).join(itemSep);
+        return mixedItems || !itemsFormRow || itemsFormRow && !nested ? '\\begin{bmatrix}' + itemsTex + '\\end{bmatrix}' : itemsTex;
+      }
+      return itemsToTex(this.items, false);
+    }
+  }
+  (0, _defineProperty2.default)(ArrayNode, "name", name);
+  return ArrayNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/AssignmentNode.js

@@ -0,0 +1,313 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createAssignmentNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _customs = require("../../utils/customs.js");
+var _factory = require("../../utils/factory.js");
+var _access = require("./utils/access.js");
+var _assign = require("./utils/assign.js");
+var _operators = require("../operators.js");
+const name = 'AssignmentNode';
+const dependencies = ['subset', '?matrix',
+// FIXME: should not be needed at all, should be handled by subset
+'Node'];
+const createAssignmentNode = exports.createAssignmentNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    subset,
+    matrix,
+    Node
+  } = _ref;
+  const access = (0, _access.accessFactory)({
+    subset
+  });
+  const assign = (0, _assign.assignFactory)({
+    subset,
+    matrix
+  });
+
+  /*
+   * Is parenthesis needed?
+   * @param {node} node
+   * @param {string} [parenthesis='keep']
+   * @param {string} implicit
+   * @private
+   */
+  function needParenthesis(node, parenthesis, implicit) {
+    if (!parenthesis) {
+      parenthesis = 'keep';
+    }
+    const precedence = (0, _operators.getPrecedence)(node, parenthesis, implicit);
+    const exprPrecedence = (0, _operators.getPrecedence)(node.value, parenthesis, implicit);
+    return parenthesis === 'all' || exprPrecedence !== null && exprPrecedence <= precedence;
+  }
+  class AssignmentNode extends Node {
+    /**
+     * @constructor AssignmentNode
+     * @extends {Node}
+     *
+     * Define a symbol, like `a=3.2`, update a property like `a.b=3.2`, or
+     * replace a subset of a matrix like `A[2,2]=42`.
+     *
+     * Syntax:
+     *
+     *     new AssignmentNode(symbol, value)
+     *     new AssignmentNode(object, index, value)
+     *
+     * Usage:
+     *
+     *    new AssignmentNode(new SymbolNode('a'), new ConstantNode(2))  // a=2
+     *    new AssignmentNode(new SymbolNode('a'),
+     *                       new IndexNode('b'),
+     *                       new ConstantNode(2))   // a.b=2
+     *    new AssignmentNode(new SymbolNode('a'),
+     *                       new IndexNode(1, 2),
+     *                       new ConstantNode(3))  // a[1,2]=3
+     *
+     * @param {SymbolNode | AccessorNode} object
+     *     Object on which to assign a value
+     * @param {IndexNode} [index=null]
+     *     Index, property name or matrix index. Optional. If not provided
+     *     and `object` is a SymbolNode, the property is assigned to the
+     *     global scope.
+     * @param {Node} value
+     *     The value to be assigned
+     */
+    constructor(object, index, value) {
+      super();
+      this.object = object;
+      this.index = value ? index : null;
+      this.value = value || index;
+
+      // validate input
+      if (!(0, _is.isSymbolNode)(object) && !(0, _is.isAccessorNode)(object)) {
+        throw new TypeError('SymbolNode or AccessorNode expected as "object"');
+      }
+      if ((0, _is.isSymbolNode)(object) && object.name === 'end') {
+        throw new Error('Cannot assign to symbol "end"');
+      }
+      if (this.index && !(0, _is.isIndexNode)(this.index)) {
+        // index is optional
+        throw new TypeError('IndexNode expected as "index"');
+      }
+      if (!(0, _is.isNode)(this.value)) {
+        throw new TypeError('Node expected as "value"');
+      }
+    }
+
+    // class name for typing purposes:
+
+    // readonly property name
+    get name() {
+      if (this.index) {
+        return this.index.isObjectProperty() ? this.index.getObjectProperty() : '';
+      } else {
+        return this.object.name || '';
+      }
+    }
+    get type() {
+      return name;
+    }
+    get isAssignmentNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const evalObject = this.object._compile(math, argNames);
+      const evalIndex = this.index ? this.index._compile(math, argNames) : null;
+      const evalValue = this.value._compile(math, argNames);
+      const name = this.object.name;
+      if (!this.index) {
+        // apply a variable to the scope, for example `a=2`
+        if (!(0, _is.isSymbolNode)(this.object)) {
+          throw new TypeError('SymbolNode expected as object');
+        }
+        return function evalAssignmentNode(scope, args, context) {
+          const value = evalValue(scope, args, context);
+          scope.set(name, value);
+          return value;
+        };
+      } else if (this.index.isObjectProperty()) {
+        // apply an object property for example `a.b=2`
+        const prop = this.index.getObjectProperty();
+        return function evalAssignmentNode(scope, args, context) {
+          const object = evalObject(scope, args, context);
+          const value = evalValue(scope, args, context);
+          (0, _customs.setSafeProperty)(object, prop, value);
+          return value;
+        };
+      } else if ((0, _is.isSymbolNode)(this.object)) {
+        // update a matrix subset, for example `a[2]=3`
+        return function evalAssignmentNode(scope, args, context) {
+          const childObject = evalObject(scope, args, context);
+          const value = evalValue(scope, args, context);
+          // Important:  we pass childObject instead of context:
+          const index = evalIndex(scope, args, childObject);
+          scope.set(name, assign(childObject, index, value));
+          return value;
+        };
+      } else {
+        // isAccessorNode(node.object) === true
+        // update a matrix subset, for example `a.b[2]=3`
+
+        // we will not use the compile function of the AccessorNode, but
+        // compile it ourselves here as we need the parent object of the
+        // AccessorNode:
+        // wee need to apply the updated object to parent object
+        const evalParentObject = this.object.object._compile(math, argNames);
+        if (this.object.index.isObjectProperty()) {
+          const parentProp = this.object.index.getObjectProperty();
+          return function evalAssignmentNode(scope, args, context) {
+            const parent = evalParentObject(scope, args, context);
+            const childObject = (0, _customs.getSafeProperty)(parent, parentProp);
+            // Important: we pass childObject instead of context:
+            const index = evalIndex(scope, args, childObject);
+            const value = evalValue(scope, args, context);
+            (0, _customs.setSafeProperty)(parent, parentProp, assign(childObject, index, value));
+            return value;
+          };
+        } else {
+          // if some parameters use the 'end' parameter, we need to calculate
+          // the size
+          const evalParentIndex = this.object.index._compile(math, argNames);
+          return function evalAssignmentNode(scope, args, context) {
+            const parent = evalParentObject(scope, args, context);
+            // Important: we pass parent instead of context:
+            const parentIndex = evalParentIndex(scope, args, parent);
+            const childObject = access(parent, parentIndex);
+            // Important:  we pass childObject instead of context
+            const index = evalIndex(scope, args, childObject);
+            const value = evalValue(scope, args, context);
+            assign(parent, parentIndex, assign(childObject, index, value));
+            return value;
+          };
+        }
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.object, 'object', this);
+      if (this.index) {
+        callback(this.index, 'index', this);
+      }
+      callback(this.value, 'value', this);
+    }
+
+    /**
+     * Create a new AssignmentNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {AssignmentNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const object = this._ifNode(callback(this.object, 'object', this));
+      const index = this.index ? this._ifNode(callback(this.index, 'index', this)) : null;
+      const value = this._ifNode(callback(this.value, 'value', this));
+      return new AssignmentNode(object, index, value);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {AssignmentNode}
+     */
+    clone() {
+      return new AssignmentNode(this.object, this.index, this.value);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string}
+     */
+    _toString(options) {
+      const object = this.object.toString(options);
+      const index = this.index ? this.index.toString(options) : '';
+      let value = this.value.toString(options);
+      if (needParenthesis(this, options && options.parenthesis, options && options.implicit)) {
+        value = '(' + value + ')';
+      }
+      return object + index + ' = ' + value;
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        object: this.object,
+        index: this.index,
+        value: this.value
+      };
+    }
+
+    /**
+     * Instantiate an AssignmentNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     `{"mathjs": "AssignmentNode", object: ..., index: ..., value: ...}`,
+     *     where mathjs is optional
+     * @returns {AssignmentNode}
+     */
+    static fromJSON(json) {
+      return new AssignmentNode(json.object, json.index, json.value);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string}
+     */
+    _toHTML(options) {
+      const object = this.object.toHTML(options);
+      const index = this.index ? this.index.toHTML(options) : '';
+      let value = this.value.toHTML(options);
+      if (needParenthesis(this, options && options.parenthesis, options && options.implicit)) {
+        value = '<span class="math-paranthesis math-round-parenthesis">(</span>' + value + '<span class="math-paranthesis math-round-parenthesis">)</span>';
+      }
+      return object + index + '<span class="math-operator math-assignment-operator ' + 'math-variable-assignment-operator math-binary-operator">=</span>' + value;
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string}
+     */
+    _toTex(options) {
+      const object = this.object.toTex(options);
+      const index = this.index ? this.index.toTex(options) : '';
+      let value = this.value.toTex(options);
+      if (needParenthesis(this, options && options.parenthesis, options && options.implicit)) {
+        value = `\\left(${value}\\right)`;
+      }
+      return object + index + '=' + value;
+    }
+  }
+  (0, _defineProperty2.default)(AssignmentNode, "name", name);
+  return AssignmentNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/BlockNode.js

@@ -0,0 +1,192 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createBlockNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _array = require("../../utils/array.js");
+var _factory = require("../../utils/factory.js");
+const name = 'BlockNode';
+const dependencies = ['ResultSet', 'Node'];
+const createBlockNode = exports.createBlockNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    ResultSet,
+    Node
+  } = _ref;
+  class BlockNode extends Node {
+    /**
+     * @constructor BlockNode
+     * @extends {Node}
+     * Holds a set with blocks
+     * @param {Array.<{node: Node} | {node: Node, visible: boolean}>} blocks
+     *            An array with blocks, where a block is constructed as an
+     *            Object with properties block, which is a Node, and visible,
+     *            which is a boolean. The property visible is optional and
+     *            is true by default
+     */
+    constructor(blocks) {
+      super();
+      // validate input, copy blocks
+      if (!Array.isArray(blocks)) throw new Error('Array expected');
+      this.blocks = blocks.map(function (block) {
+        const node = block && block.node;
+        const visible = block && block.visible !== undefined ? block.visible : true;
+        if (!(0, _is.isNode)(node)) throw new TypeError('Property "node" must be a Node');
+        if (typeof visible !== 'boolean') {
+          throw new TypeError('Property "visible" must be a boolean');
+        }
+        return {
+          node,
+          visible
+        };
+      });
+    }
+    get type() {
+      return name;
+    }
+    get isBlockNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const evalBlocks = (0, _array.map)(this.blocks, function (block) {
+        return {
+          evaluate: block.node._compile(math, argNames),
+          visible: block.visible
+        };
+      });
+      return function evalBlockNodes(scope, args, context) {
+        const results = [];
+        (0, _array.forEach)(evalBlocks, function evalBlockNode(block) {
+          const result = block.evaluate(scope, args, context);
+          if (block.visible) {
+            results.push(result);
+          }
+        });
+        return new ResultSet(results);
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child blocks of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      for (let i = 0; i < this.blocks.length; i++) {
+        callback(this.blocks[i].node, 'blocks[' + i + '].node', this);
+      }
+    }
+
+    /**
+     * Create a new BlockNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {BlockNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const blocks = [];
+      for (let i = 0; i < this.blocks.length; i++) {
+        const block = this.blocks[i];
+        const node = this._ifNode(callback(block.node, 'blocks[' + i + '].node', this));
+        blocks[i] = {
+          node,
+          visible: block.visible
+        };
+      }
+      return new BlockNode(blocks);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {BlockNode}
+     */
+    clone() {
+      const blocks = this.blocks.map(function (block) {
+        return {
+          node: block.node,
+          visible: block.visible
+        };
+      });
+      return new BlockNode(blocks);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toString(options) {
+      return this.blocks.map(function (param) {
+        return param.node.toString(options) + (param.visible ? '' : ';');
+      }).join('\n');
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        blocks: this.blocks
+      };
+    }
+
+    /**
+     * Instantiate an BlockNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     `{"mathjs": "BlockNode", blocks: [{node: ..., visible: false}, ...]}`,
+     *     where mathjs is optional
+     * @returns {BlockNode}
+     */
+    static fromJSON(json) {
+      return new BlockNode(json.blocks);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toHTML(options) {
+      return this.blocks.map(function (param) {
+        return param.node.toHTML(options) + (param.visible ? '' : '<span class="math-separator">;</span>');
+      }).join('<span class="math-separator"><br /></span>');
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      return this.blocks.map(function (param) {
+        return param.node.toTex(options) + (param.visible ? '' : ';');
+      }).join('\\;\\;\n');
+    }
+  }
+  (0, _defineProperty2.default)(BlockNode, "name", name);
+  return BlockNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/ConditionalNode.js

@@ -0,0 +1,232 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createConditionalNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _factory = require("../../utils/factory.js");
+var _operators = require("../operators.js");
+const name = 'ConditionalNode';
+const dependencies = ['Node'];
+const createConditionalNode = exports.createConditionalNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  /**
+   * Test whether a condition is met
+   * @param {*} condition
+   * @returns {boolean} true if condition is true or non-zero, else false
+   */
+  function testCondition(condition) {
+    if (typeof condition === 'number' || typeof condition === 'boolean' || typeof condition === 'string') {
+      return !!condition;
+    }
+    if (condition) {
+      if ((0, _is.isBigNumber)(condition)) {
+        return !condition.isZero();
+      }
+      if ((0, _is.isComplex)(condition)) {
+        return !!(condition.re || condition.im);
+      }
+      if ((0, _is.isUnit)(condition)) {
+        return !!condition.value;
+      }
+    }
+    if (condition === null || condition === undefined) {
+      return false;
+    }
+    throw new TypeError('Unsupported type of condition "' + (0, _is.typeOf)(condition) + '"');
+  }
+  class ConditionalNode extends Node {
+    /**
+     * A lazy evaluating conditional operator: 'condition ? trueExpr : falseExpr'
+     *
+     * @param {Node} condition   Condition, must result in a boolean
+     * @param {Node} trueExpr    Expression evaluated when condition is true
+     * @param {Node} falseExpr   Expression evaluated when condition is true
+     *
+     * @constructor ConditionalNode
+     * @extends {Node}
+     */
+    constructor(condition, trueExpr, falseExpr) {
+      super();
+      if (!(0, _is.isNode)(condition)) {
+        throw new TypeError('Parameter condition must be a Node');
+      }
+      if (!(0, _is.isNode)(trueExpr)) {
+        throw new TypeError('Parameter trueExpr must be a Node');
+      }
+      if (!(0, _is.isNode)(falseExpr)) {
+        throw new TypeError('Parameter falseExpr must be a Node');
+      }
+      this.condition = condition;
+      this.trueExpr = trueExpr;
+      this.falseExpr = falseExpr;
+    }
+    get type() {
+      return name;
+    }
+    get isConditionalNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const evalCondition = this.condition._compile(math, argNames);
+      const evalTrueExpr = this.trueExpr._compile(math, argNames);
+      const evalFalseExpr = this.falseExpr._compile(math, argNames);
+      return function evalConditionalNode(scope, args, context) {
+        return testCondition(evalCondition(scope, args, context)) ? evalTrueExpr(scope, args, context) : evalFalseExpr(scope, args, context);
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.condition, 'condition', this);
+      callback(this.trueExpr, 'trueExpr', this);
+      callback(this.falseExpr, 'falseExpr', this);
+    }
+
+    /**
+     * Create a new ConditionalNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {ConditionalNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      return new ConditionalNode(this._ifNode(callback(this.condition, 'condition', this)), this._ifNode(callback(this.trueExpr, 'trueExpr', this)), this._ifNode(callback(this.falseExpr, 'falseExpr', this)));
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {ConditionalNode}
+     */
+    clone() {
+      return new ConditionalNode(this.condition, this.trueExpr, this.falseExpr);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const precedence = (0, _operators.getPrecedence)(this, parenthesis, options && options.implicit);
+
+      // Enclose Arguments in parentheses if they are an OperatorNode
+      // or have lower or equal precedence
+      // NOTE: enclosing all OperatorNodes in parentheses is a decision
+      // purely based on aesthetics and readability
+      let condition = this.condition.toString(options);
+      const conditionPrecedence = (0, _operators.getPrecedence)(this.condition, parenthesis, options && options.implicit);
+      if (parenthesis === 'all' || this.condition.type === 'OperatorNode' || conditionPrecedence !== null && conditionPrecedence <= precedence) {
+        condition = '(' + condition + ')';
+      }
+      let trueExpr = this.trueExpr.toString(options);
+      const truePrecedence = (0, _operators.getPrecedence)(this.trueExpr, parenthesis, options && options.implicit);
+      if (parenthesis === 'all' || this.trueExpr.type === 'OperatorNode' || truePrecedence !== null && truePrecedence <= precedence) {
+        trueExpr = '(' + trueExpr + ')';
+      }
+      let falseExpr = this.falseExpr.toString(options);
+      const falsePrecedence = (0, _operators.getPrecedence)(this.falseExpr, parenthesis, options && options.implicit);
+      if (parenthesis === 'all' || this.falseExpr.type === 'OperatorNode' || falsePrecedence !== null && falsePrecedence <= precedence) {
+        falseExpr = '(' + falseExpr + ')';
+      }
+      return condition + ' ? ' + trueExpr + ' : ' + falseExpr;
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        condition: this.condition,
+        trueExpr: this.trueExpr,
+        falseExpr: this.falseExpr
+      };
+    }
+
+    /**
+     * Instantiate an ConditionalNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     ```
+     *     {"mathjs": "ConditionalNode",
+     *      "condition": ...,
+     *      "trueExpr": ...,
+     *      "falseExpr": ...}
+     *     ```
+     *     where mathjs is optional
+     * @returns {ConditionalNode}
+     */
+    static fromJSON(json) {
+      return new ConditionalNode(json.condition, json.trueExpr, json.falseExpr);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const precedence = (0, _operators.getPrecedence)(this, parenthesis, options && options.implicit);
+
+      // Enclose Arguments in parentheses if they are an OperatorNode
+      // or have lower or equal precedence
+      // NOTE: enclosing all OperatorNodes in parentheses is a decision
+      // purely based on aesthetics and readability
+      let condition = this.condition.toHTML(options);
+      const conditionPrecedence = (0, _operators.getPrecedence)(this.condition, parenthesis, options && options.implicit);
+      if (parenthesis === 'all' || this.condition.type === 'OperatorNode' || conditionPrecedence !== null && conditionPrecedence <= precedence) {
+        condition = '<span class="math-parenthesis math-round-parenthesis">(</span>' + condition + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      let trueExpr = this.trueExpr.toHTML(options);
+      const truePrecedence = (0, _operators.getPrecedence)(this.trueExpr, parenthesis, options && options.implicit);
+      if (parenthesis === 'all' || this.trueExpr.type === 'OperatorNode' || truePrecedence !== null && truePrecedence <= precedence) {
+        trueExpr = '<span class="math-parenthesis math-round-parenthesis">(</span>' + trueExpr + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      let falseExpr = this.falseExpr.toHTML(options);
+      const falsePrecedence = (0, _operators.getPrecedence)(this.falseExpr, parenthesis, options && options.implicit);
+      if (parenthesis === 'all' || this.falseExpr.type === 'OperatorNode' || falsePrecedence !== null && falsePrecedence <= precedence) {
+        falseExpr = '<span class="math-parenthesis math-round-parenthesis">(</span>' + falseExpr + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      return condition + '<span class="math-operator math-conditional-operator">?</span>' + trueExpr + '<span class="math-operator math-conditional-operator">:</span>' + falseExpr;
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      return '\\begin{cases} {' + this.trueExpr.toTex(options) + '}, &\\quad{\\text{if }\\;' + this.condition.toTex(options) + '}\\\\{' + this.falseExpr.toTex(options) + '}, &\\quad{\\text{otherwise}}\\end{cases}';
+    }
+  }
+  (0, _defineProperty2.default)(ConditionalNode, "name", name);
+  return ConditionalNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/ConstantNode.js

@@ -0,0 +1,186 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createConstantNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _string = require("../../utils/string.js");
+var _is = require("../../utils/is.js");
+var _latex = require("../../utils/latex.js");
+var _factory = require("../../utils/factory.js");
+const name = 'ConstantNode';
+const dependencies = ['Node'];
+const createConstantNode = exports.createConstantNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  class ConstantNode extends Node {
+    /**
+     * A ConstantNode holds a constant value like a number or string.
+     *
+     * Usage:
+     *
+     *     new ConstantNode(2.3)
+     *     new ConstantNode('hello')
+     *
+     * @param {*} value    Value can be any type (number, BigNumber, bigint, string, ...)
+     * @constructor ConstantNode
+     * @extends {Node}
+     */
+    constructor(value) {
+      super();
+      this.value = value;
+    }
+    get type() {
+      return name;
+    }
+    get isConstantNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const value = this.value;
+      return function evalConstantNode() {
+        return value;
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      // nothing to do, we don't have any children
+    }
+
+    /**
+     * Create a new ConstantNode with children produced by the given callback.
+     * Trivial because there are no children.
+     * @param {function(child: Node, path: string, parent: Node) : Node} callback
+     * @returns {ConstantNode} Returns a clone of the node
+     */
+    map(callback) {
+      return this.clone();
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {ConstantNode}
+     */
+    clone() {
+      return new ConstantNode(this.value);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      return (0, _string.format)(this.value, options);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const value = this._toString(options);
+      switch ((0, _is.typeOf)(this.value)) {
+        case 'number':
+        case 'bigint':
+        case 'BigNumber':
+        case 'Fraction':
+          return '<span class="math-number">' + value + '</span>';
+        case 'string':
+          return '<span class="math-string">' + value + '</span>';
+        case 'boolean':
+          return '<span class="math-boolean">' + value + '</span>';
+        case 'null':
+          return '<span class="math-null-symbol">' + value + '</span>';
+        case 'undefined':
+          return '<span class="math-undefined">' + value + '</span>';
+        default:
+          return '<span class="math-symbol">' + value + '</span>';
+      }
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        value: this.value
+      };
+    }
+
+    /**
+     * Instantiate a ConstantNode from its JSON representation
+     * @param {Object} json  An object structured like
+     *                       `{"mathjs": "SymbolNode", value: 2.3}`,
+     *                       where mathjs is optional
+     * @returns {ConstantNode}
+     */
+    static fromJSON(json) {
+      return new ConstantNode(json.value);
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const value = this._toString(options);
+      const type = (0, _is.typeOf)(this.value);
+      switch (type) {
+        case 'string':
+          return '\\mathtt{' + (0, _latex.escapeLatex)(value) + '}';
+        case 'number':
+        case 'BigNumber':
+          {
+            const finite = type === 'BigNumber' ? this.value.isFinite() : isFinite(this.value);
+            if (!finite) {
+              return this.value.valueOf() < 0 ? '-\\infty' : '\\infty';
+            }
+            const index = value.toLowerCase().indexOf('e');
+            if (index !== -1) {
+              return value.substring(0, index) + '\\cdot10^{' + value.substring(index + 1) + '}';
+            }
+            return value;
+          }
+        case 'bigint':
+          {
+            return value.toString();
+          }
+        case 'Fraction':
+          return this.value.toLatex();
+        default:
+          return value;
+      }
+    }
+  }
+  (0, _defineProperty2.default)(ConstantNode, "name", name);
+  return ConstantNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/FunctionAssignmentNode.js

@@ -0,0 +1,242 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createFunctionAssignmentNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _keywords = require("../keywords.js");
+var _string = require("../../utils/string.js");
+var _array = require("../../utils/array.js");
+var _latex = require("../../utils/latex.js");
+var _operators = require("../operators.js");
+var _factory = require("../../utils/factory.js");
+const name = 'FunctionAssignmentNode';
+const dependencies = ['typed', 'Node'];
+const createFunctionAssignmentNode = exports.createFunctionAssignmentNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    typed,
+    Node
+  } = _ref;
+  /**
+   * Is parenthesis needed?
+   * @param {Node} node
+   * @param {Object} parenthesis
+   * @param {string} implicit
+   * @private
+   */
+  function needParenthesis(node, parenthesis, implicit) {
+    const precedence = (0, _operators.getPrecedence)(node, parenthesis, implicit);
+    const exprPrecedence = (0, _operators.getPrecedence)(node.expr, parenthesis, implicit);
+    return parenthesis === 'all' || exprPrecedence !== null && exprPrecedence <= precedence;
+  }
+  class FunctionAssignmentNode extends Node {
+    /**
+     * @constructor FunctionAssignmentNode
+     * @extends {Node}
+     * Function assignment
+     *
+     * @param {string} name           Function name
+     * @param {string[] | Array.<{name: string, type: string}>} params
+     *                                Array with function parameter names, or an
+     *                                array with objects containing the name
+     *                                and type of the parameter
+     * @param {Node} expr             The function expression
+     */
+    constructor(name, params, expr) {
+      super();
+      // validate input
+      if (typeof name !== 'string') {
+        throw new TypeError('String expected for parameter "name"');
+      }
+      if (!Array.isArray(params)) {
+        throw new TypeError('Array containing strings or objects expected for parameter "params"');
+      }
+      if (!(0, _is.isNode)(expr)) {
+        throw new TypeError('Node expected for parameter "expr"');
+      }
+      if (_keywords.keywords.has(name)) {
+        throw new Error('Illegal function name, "' + name + '" is a reserved keyword');
+      }
+      const paramNames = new Set();
+      for (const param of params) {
+        const name = typeof param === 'string' ? param : param.name;
+        if (paramNames.has(name)) {
+          throw new Error(`Duplicate parameter name "${name}"`);
+        } else {
+          paramNames.add(name);
+        }
+      }
+      this.name = name;
+      this.params = params.map(function (param) {
+        return param && param.name || param;
+      });
+      this.types = params.map(function (param) {
+        return param && param.type || 'any';
+      });
+      this.expr = expr;
+    }
+    get type() {
+      return name;
+    }
+    get isFunctionAssignmentNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const childArgNames = Object.create(argNames);
+      (0, _array.forEach)(this.params, function (param) {
+        childArgNames[param] = true;
+      });
+
+      // compile the function expression with the child args
+      const evalExpr = this.expr._compile(math, childArgNames);
+      const name = this.name;
+      const params = this.params;
+      const signature = (0, _array.join)(this.types, ',');
+      const syntax = name + '(' + (0, _array.join)(this.params, ', ') + ')';
+      return function evalFunctionAssignmentNode(scope, args, context) {
+        const signatures = {};
+        signatures[signature] = function () {
+          const childArgs = Object.create(args);
+          for (let i = 0; i < params.length; i++) {
+            childArgs[params[i]] = arguments[i];
+          }
+          return evalExpr(scope, childArgs, context);
+        };
+        const fn = typed(name, signatures);
+        fn.syntax = syntax;
+        scope.set(name, fn);
+        return fn;
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.expr, 'expr', this);
+    }
+
+    /**
+     * Create a new FunctionAssignmentNode whose children are the results of
+     * calling the provided callback function for each child of the original
+     * node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {FunctionAssignmentNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const expr = this._ifNode(callback(this.expr, 'expr', this));
+      return new FunctionAssignmentNode(this.name, this.params.slice(0), expr);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {FunctionAssignmentNode}
+     */
+    clone() {
+      return new FunctionAssignmentNode(this.name, this.params.slice(0), this.expr);
+    }
+
+    /**
+     * get string representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      let expr = this.expr.toString(options);
+      if (needParenthesis(this, parenthesis, options && options.implicit)) {
+        expr = '(' + expr + ')';
+      }
+      return this.name + '(' + this.params.join(', ') + ') = ' + expr;
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      const types = this.types;
+      return {
+        mathjs: name,
+        name: this.name,
+        params: this.params.map(function (param, index) {
+          return {
+            name: param,
+            type: types[index]
+          };
+        }),
+        expr: this.expr
+      };
+    }
+
+    /**
+     * Instantiate an FunctionAssignmentNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     ```
+     *     {"mathjs": "FunctionAssignmentNode",
+     *      name: ..., params: ..., expr: ...}
+     *     ```
+     *     where mathjs is optional
+     * @returns {FunctionAssignmentNode}
+     */
+    static fromJSON(json) {
+      return new FunctionAssignmentNode(json.name, json.params, json.expr);
+    }
+
+    /**
+     * get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const params = [];
+      for (let i = 0; i < this.params.length; i++) {
+        params.push('<span class="math-symbol math-parameter">' + (0, _string.escape)(this.params[i]) + '</span>');
+      }
+      let expr = this.expr.toHTML(options);
+      if (needParenthesis(this, parenthesis, options && options.implicit)) {
+        expr = '<span class="math-parenthesis math-round-parenthesis">(</span>' + expr + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      return '<span class="math-function">' + (0, _string.escape)(this.name) + '</span>' + '<span class="math-parenthesis math-round-parenthesis">(</span>' + params.join('<span class="math-separator">,</span>') + '<span class="math-parenthesis math-round-parenthesis">)</span>' + '<span class="math-operator math-assignment-operator ' + 'math-variable-assignment-operator math-binary-operator">=</span>' + expr;
+    }
+
+    /**
+     * get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      let expr = this.expr.toTex(options);
+      if (needParenthesis(this, parenthesis, options && options.implicit)) {
+        expr = `\\left(${expr}\\right)`;
+      }
+      return '\\mathrm{' + this.name + '}\\left(' + this.params.map(_latex.toSymbol).join(',') + '\\right)=' + expr;
+    }
+  }
+  (0, _defineProperty2.default)(FunctionAssignmentNode, "name", name);
+  return FunctionAssignmentNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/FunctionNode.js

@@ -0,0 +1,486 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createFunctionNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _string = require("../../utils/string.js");
+var _object = require("../../utils/object.js");
+var _customs = require("../../utils/customs.js");
+var _scope = require("../../utils/scope.js");
+var _factory = require("../../utils/factory.js");
+var _latex = require("../../utils/latex.js");
+const name = 'FunctionNode';
+const dependencies = ['math', 'Node', 'SymbolNode'];
+const createFunctionNode = exports.createFunctionNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  var _FunctionNode;
+  let {
+    math,
+    Node,
+    SymbolNode
+  } = _ref;
+  /* format to fixed length */
+  const strin = entity => (0, _string.format)(entity, {
+    truncate: 78
+  });
+
+  /*
+   * Expand a LaTeX template
+   *
+   * @param {string} template
+   * @param {Node} node
+   * @param {Object} options
+   * @private
+   **/
+  function expandTemplate(template, node, options) {
+    let latex = '';
+
+    // Match everything of the form ${identifier} or ${identifier[2]} or $$
+    // while submatching identifier and 2 (in the second case)
+    const regex = /\$(?:\{([a-z_][a-z_0-9]*)(?:\[([0-9]+)\])?\}|\$)/gi;
+    let inputPos = 0; // position in the input string
+    let match;
+    while ((match = regex.exec(template)) !== null) {
+      // go through all matches
+      // add everything in front of the match to the LaTeX string
+      latex += template.substring(inputPos, match.index);
+      inputPos = match.index;
+      if (match[0] === '$$') {
+        // escaped dollar sign
+        latex += '$';
+        inputPos++;
+      } else {
+        // template parameter
+        inputPos += match[0].length;
+        const property = node[match[1]];
+        if (!property) {
+          throw new ReferenceError('Template: Property ' + match[1] + ' does not exist.');
+        }
+        if (match[2] === undefined) {
+          // no square brackets
+          switch (typeof property) {
+            case 'string':
+              latex += property;
+              break;
+            case 'object':
+              if ((0, _is.isNode)(property)) {
+                latex += property.toTex(options);
+              } else if (Array.isArray(property)) {
+                // make array of Nodes into comma separated list
+                latex += property.map(function (arg, index) {
+                  if ((0, _is.isNode)(arg)) {
+                    return arg.toTex(options);
+                  }
+                  throw new TypeError('Template: ' + match[1] + '[' + index + '] is not a Node.');
+                }).join(',');
+              } else {
+                throw new TypeError('Template: ' + match[1] + ' has to be a Node, String or array of Nodes');
+              }
+              break;
+            default:
+              throw new TypeError('Template: ' + match[1] + ' has to be a Node, String or array of Nodes');
+          }
+        } else {
+          // with square brackets
+          if ((0, _is.isNode)(property[match[2]] && property[match[2]])) {
+            latex += property[match[2]].toTex(options);
+          } else {
+            throw new TypeError('Template: ' + match[1] + '[' + match[2] + '] is not a Node.');
+          }
+        }
+      }
+    }
+    latex += template.slice(inputPos); // append rest of the template
+
+    return latex;
+  }
+  class FunctionNode extends Node {
+    /**
+     * @constructor FunctionNode
+     * @extends {./Node}
+     * invoke a list with arguments on a node
+     * @param {./Node | string} fn
+     *     Item resolving to a function on which to invoke
+     *     the arguments, typically a SymbolNode or AccessorNode
+     * @param {./Node[]} args
+     */
+    constructor(fn, args) {
+      super();
+      if (typeof fn === 'string') {
+        fn = new SymbolNode(fn);
+      }
+
+      // validate input
+      if (!(0, _is.isNode)(fn)) throw new TypeError('Node expected as parameter "fn"');
+      if (!Array.isArray(args) || !args.every(_is.isNode)) {
+        throw new TypeError('Array containing Nodes expected for parameter "args"');
+      }
+      this.fn = fn;
+      this.args = args || [];
+    }
+
+    // readonly property name
+    get name() {
+      return this.fn.name || '';
+    }
+    get type() {
+      return name;
+    }
+    get isFunctionNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      // compile arguments
+      const evalArgs = this.args.map(arg => arg._compile(math, argNames));
+      if ((0, _is.isSymbolNode)(this.fn)) {
+        const name = this.fn.name;
+        if (!argNames[name]) {
+          // we can statically determine whether the function
+          // has the rawArgs property
+          const fn = name in math ? (0, _customs.getSafeProperty)(math, name) : undefined;
+          const isRaw = typeof fn === 'function' && fn.rawArgs === true;
+          const resolveFn = scope => {
+            let value;
+            if (scope.has(name)) {
+              value = scope.get(name);
+            } else if (name in math) {
+              value = (0, _customs.getSafeProperty)(math, name);
+            } else {
+              return FunctionNode.onUndefinedFunction(name);
+            }
+            if (typeof value === 'function') {
+              return value;
+            }
+            throw new TypeError(`'${name}' is not a function; its value is:\n  ${strin(value)}`);
+          };
+          if (isRaw) {
+            // pass unevaluated parameters (nodes) to the function
+            // "raw" evaluation
+            const rawArgs = this.args;
+            return function evalFunctionNode(scope, args, context) {
+              const fn = resolveFn(scope);
+
+              // the original function can be overwritten in the scope with a non-rawArgs function
+              if (fn.rawArgs === true) {
+                return fn(rawArgs, math, (0, _scope.createSubScope)(scope, args));
+              } else {
+                // "regular" evaluation
+                const values = evalArgs.map(evalArg => evalArg(scope, args, context));
+                return fn(...values);
+              }
+            };
+          } else {
+            // "regular" evaluation
+            switch (evalArgs.length) {
+              case 0:
+                return function evalFunctionNode(scope, args, context) {
+                  const fn = resolveFn(scope);
+                  return fn();
+                };
+              case 1:
+                return function evalFunctionNode(scope, args, context) {
+                  const fn = resolveFn(scope);
+                  const evalArg0 = evalArgs[0];
+                  return fn(evalArg0(scope, args, context));
+                };
+              case 2:
+                return function evalFunctionNode(scope, args, context) {
+                  const fn = resolveFn(scope);
+                  const evalArg0 = evalArgs[0];
+                  const evalArg1 = evalArgs[1];
+                  return fn(evalArg0(scope, args, context), evalArg1(scope, args, context));
+                };
+              default:
+                return function evalFunctionNode(scope, args, context) {
+                  const fn = resolveFn(scope);
+                  const values = evalArgs.map(evalArg => evalArg(scope, args, context));
+                  return fn(...values);
+                };
+            }
+          }
+        } else {
+          // the function symbol is an argName
+          const rawArgs = this.args;
+          return function evalFunctionNode(scope, args, context) {
+            const fn = (0, _customs.getSafeProperty)(args, name);
+            if (typeof fn !== 'function') {
+              throw new TypeError(`Argument '${name}' was not a function; received: ${strin(fn)}`);
+            }
+            if (fn.rawArgs) {
+              // "Raw" evaluation
+              return fn(rawArgs, math, (0, _scope.createSubScope)(scope, args));
+            } else {
+              const values = evalArgs.map(evalArg => evalArg(scope, args, context));
+              return fn.apply(fn, values);
+            }
+          };
+        }
+      } else if ((0, _is.isAccessorNode)(this.fn) && (0, _is.isIndexNode)(this.fn.index) && this.fn.index.isObjectProperty()) {
+        // execute the function with the right context:
+        // the object of the AccessorNode
+
+        const evalObject = this.fn.object._compile(math, argNames);
+        const prop = this.fn.index.getObjectProperty();
+        const rawArgs = this.args;
+        return function evalFunctionNode(scope, args, context) {
+          const object = evalObject(scope, args, context);
+          const fn = (0, _customs.getSafeMethod)(object, prop);
+          if (fn !== null && fn !== void 0 && fn.rawArgs) {
+            // "Raw" evaluation
+            return fn(rawArgs, math, (0, _scope.createSubScope)(scope, args));
+          } else {
+            // "regular" evaluation
+            const values = evalArgs.map(evalArg => evalArg(scope, args, context));
+            return fn.apply(object, values);
+          }
+        };
+      } else {
+        // node.fn.isAccessorNode && !node.fn.index.isObjectProperty()
+        // we have to dynamically determine whether the function has the
+        // rawArgs property
+        const fnExpr = this.fn.toString();
+        const evalFn = this.fn._compile(math, argNames);
+        const rawArgs = this.args;
+        return function evalFunctionNode(scope, args, context) {
+          const fn = evalFn(scope, args, context);
+          if (typeof fn !== 'function') {
+            throw new TypeError(`Expression '${fnExpr}' did not evaluate to a function; value is:` + `\n  ${strin(fn)}`);
+          }
+          if (fn.rawArgs) {
+            // "Raw" evaluation
+            return fn(rawArgs, math, (0, _scope.createSubScope)(scope, args));
+          } else {
+            // "regular" evaluation
+            const values = evalArgs.map(evalArg => evalArg(scope, args, context));
+            return fn.apply(fn, values);
+          }
+        };
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.fn, 'fn', this);
+      for (let i = 0; i < this.args.length; i++) {
+        callback(this.args[i], 'args[' + i + ']', this);
+      }
+    }
+
+    /**
+     * Create a new FunctionNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {FunctionNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const fn = this._ifNode(callback(this.fn, 'fn', this));
+      const args = [];
+      for (let i = 0; i < this.args.length; i++) {
+        args[i] = this._ifNode(callback(this.args[i], 'args[' + i + ']', this));
+      }
+      return new FunctionNode(fn, args);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {FunctionNode}
+     */
+    clone() {
+      return new FunctionNode(this.fn, this.args.slice(0));
+    }
+
+    /**
+     * Throws an error 'Undefined function {name}'
+     * @param {string} name
+     */
+
+    /**
+     * Get string representation. (wrapper function)
+     * This overrides parts of Node's toString function.
+     * If callback is an object containing callbacks, it
+     * calls the correct callback for the current node,
+     * otherwise it falls back to calling Node's toString
+     * function.
+     *
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    toString(options) {
+      let customString;
+      const name = this.fn.toString(options);
+      if (options && typeof options.handler === 'object' && (0, _object.hasOwnProperty)(options.handler, name)) {
+        // callback is a map of callback functions
+        customString = options.handler[name](this, options);
+      }
+      if (typeof customString !== 'undefined') {
+        return customString;
+      }
+
+      // fall back to Node's toString
+      return super.toString(options);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      const args = this.args.map(function (arg) {
+        return arg.toString(options);
+      });
+      const fn = (0, _is.isFunctionAssignmentNode)(this.fn) ? '(' + this.fn.toString(options) + ')' : this.fn.toString(options);
+
+      // format the arguments like "add(2, 4.2)"
+      return fn + '(' + args.join(', ') + ')';
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        fn: this.fn,
+        args: this.args
+      };
+    }
+
+    /**
+     * Instantiate an AssignmentNode from its JSON representation
+     * @param {Object} json  An object structured like
+     *                       `{"mathjs": "FunctionNode", fn: ..., args: ...}`,
+     *                       where mathjs is optional
+     * @returns {FunctionNode}
+     */
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const args = this.args.map(function (arg) {
+        return arg.toHTML(options);
+      });
+
+      // format the arguments like "add(2, 4.2)"
+      return '<span class="math-function">' + (0, _string.escape)(this.fn) + '</span><span class="math-paranthesis math-round-parenthesis">(</span>' + args.join('<span class="math-separator">,</span>') + '<span class="math-paranthesis math-round-parenthesis">)</span>';
+    }
+
+    /**
+     * Get LaTeX representation. (wrapper function)
+     * This overrides parts of Node's toTex function.
+     * If callback is an object containing callbacks, it
+     * calls the correct callback for the current node,
+     * otherwise it falls back to calling Node's toTex
+     * function.
+     *
+     * @param {Object} options
+     * @return {string}
+     */
+    toTex(options) {
+      let customTex;
+      if (options && typeof options.handler === 'object' && (0, _object.hasOwnProperty)(options.handler, this.name)) {
+        // callback is a map of callback functions
+        customTex = options.handler[this.name](this, options);
+      }
+      if (typeof customTex !== 'undefined') {
+        return customTex;
+      }
+
+      // fall back to Node's toTex
+      return super.toTex(options);
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const args = this.args.map(function (arg) {
+        // get LaTeX of the arguments
+        return arg.toTex(options);
+      });
+      let latexConverter;
+      if (_latex.latexFunctions[this.name]) {
+        latexConverter = _latex.latexFunctions[this.name];
+      }
+
+      // toTex property on the function itself
+      if (math[this.name] && (typeof math[this.name].toTex === 'function' || typeof math[this.name].toTex === 'object' || typeof math[this.name].toTex === 'string')) {
+        // .toTex is a callback function
+        latexConverter = math[this.name].toTex;
+      }
+      let customToTex;
+      switch (typeof latexConverter) {
+        case 'function':
+          // a callback function
+          customToTex = latexConverter(this, options);
+          break;
+        case 'string':
+          // a template string
+          customToTex = expandTemplate(latexConverter, this, options);
+          break;
+        case 'object':
+          // an object with different "converters" for different
+          // numbers of arguments
+          switch (typeof latexConverter[args.length]) {
+            case 'function':
+              customToTex = latexConverter[args.length](this, options);
+              break;
+            case 'string':
+              customToTex = expandTemplate(latexConverter[args.length], this, options);
+              break;
+          }
+      }
+      if (typeof customToTex !== 'undefined') {
+        return customToTex;
+      }
+      return expandTemplate(_latex.defaultTemplate, this, options);
+    }
+
+    /**
+     * Get identifier.
+     * @return {string}
+     */
+    getIdentifier() {
+      return this.type + ':' + this.name;
+    }
+  }
+  _FunctionNode = FunctionNode;
+  (0, _defineProperty2.default)(FunctionNode, "name", name);
+  (0, _defineProperty2.default)(FunctionNode, "onUndefinedFunction", function (name) {
+    throw new Error('Undefined function ' + name);
+  });
+  (0, _defineProperty2.default)(FunctionNode, "fromJSON", function (json) {
+    return new _FunctionNode(json.fn, json.args);
+  });
+  return FunctionNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/IndexNode.js

@@ -0,0 +1,226 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createIndexNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _array = require("../../utils/array.js");
+var _customs = require("../../utils/customs.js");
+var _factory = require("../../utils/factory.js");
+var _is = require("../../utils/is.js");
+var _string = require("../../utils/string.js");
+const name = 'IndexNode';
+const dependencies = ['Node', 'size'];
+const createIndexNode = exports.createIndexNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node,
+    size
+  } = _ref;
+  class IndexNode extends Node {
+    /**
+     * @constructor IndexNode
+     * @extends Node
+     *
+     * Describes a subset of a matrix or an object property.
+     * Cannot be used on its own, needs to be used within an AccessorNode or
+     * AssignmentNode.
+     *
+     * @param {Node[]} dimensions
+     * @param {boolean} [dotNotation=false]
+     *     Optional property describing whether this index was written using dot
+     *     notation like `a.b`, or using bracket notation like `a["b"]`
+     *     (which is the default). This property is used for string conversion.
+     */
+    constructor(dimensions, dotNotation) {
+      super();
+      this.dimensions = dimensions;
+      this.dotNotation = dotNotation || false;
+
+      // validate input
+      if (!Array.isArray(dimensions) || !dimensions.every(_is.isNode)) {
+        throw new TypeError('Array containing Nodes expected for parameter "dimensions"');
+      }
+      if (this.dotNotation && !this.isObjectProperty()) {
+        throw new Error('dotNotation only applicable for object properties');
+      }
+    }
+    get type() {
+      return name;
+    }
+    get isIndexNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      // TODO: implement support for bignumber (currently bignumbers are silently
+      //       reduced to numbers when changing the value to zero-based)
+
+      // TODO: Optimization: when the range values are ConstantNodes,
+      //       we can beforehand resolve the zero-based value
+
+      // optimization for a simple object property
+      const evalDimensions = (0, _array.map)(this.dimensions, function (dimension, i) {
+        const needsEnd = dimension.filter(node => node.isSymbolNode && node.name === 'end').length > 0;
+        if (needsEnd) {
+          // SymbolNode 'end' is used inside the index,
+          // like in `A[end]` or `A[end - 2]`
+          const childArgNames = Object.create(argNames);
+          childArgNames.end = true;
+          const _evalDimension = dimension._compile(math, childArgNames);
+          return function evalDimension(scope, args, context) {
+            if (!(0, _is.isMatrix)(context) && !(0, _is.isArray)(context) && !(0, _is.isString)(context)) {
+              throw new TypeError('Cannot resolve "end": ' + 'context must be a Matrix, Array, or string but is ' + (0, _is.typeOf)(context));
+            }
+            const s = size(context).valueOf();
+            const childArgs = Object.create(args);
+            childArgs.end = s[i];
+            return _evalDimension(scope, childArgs, context);
+          };
+        } else {
+          // SymbolNode `end` not used
+          return dimension._compile(math, argNames);
+        }
+      });
+      const index = (0, _customs.getSafeProperty)(math, 'index');
+      return function evalIndexNode(scope, args, context) {
+        const dimensions = (0, _array.map)(evalDimensions, function (evalDimension) {
+          return evalDimension(scope, args, context);
+        });
+        return index(...dimensions);
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      for (let i = 0; i < this.dimensions.length; i++) {
+        callback(this.dimensions[i], 'dimensions[' + i + ']', this);
+      }
+    }
+
+    /**
+     * Create a new IndexNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {IndexNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const dimensions = [];
+      for (let i = 0; i < this.dimensions.length; i++) {
+        dimensions[i] = this._ifNode(callback(this.dimensions[i], 'dimensions[' + i + ']', this));
+      }
+      return new IndexNode(dimensions, this.dotNotation);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {IndexNode}
+     */
+    clone() {
+      return new IndexNode(this.dimensions.slice(0), this.dotNotation);
+    }
+
+    /**
+     * Test whether this IndexNode contains a single property name
+     * @return {boolean}
+     */
+    isObjectProperty() {
+      return this.dimensions.length === 1 && (0, _is.isConstantNode)(this.dimensions[0]) && typeof this.dimensions[0].value === 'string';
+    }
+
+    /**
+     * Returns the property name if IndexNode contains a property.
+     * If not, returns null.
+     * @return {string | null}
+     */
+    getObjectProperty() {
+      return this.isObjectProperty() ? this.dimensions[0].value : null;
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      // format the parameters like "[1, 0:5]"
+      return this.dotNotation ? '.' + this.getObjectProperty() : '[' + this.dimensions.join(', ') + ']';
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        dimensions: this.dimensions,
+        dotNotation: this.dotNotation
+      };
+    }
+
+    /**
+     * Instantiate an IndexNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     `{"mathjs": "IndexNode", dimensions: [...], dotNotation: false}`,
+     *     where mathjs is optional
+     * @returns {IndexNode}
+     */
+    static fromJSON(json) {
+      return new IndexNode(json.dimensions, json.dotNotation);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      // format the parameters like "[1, 0:5]"
+      const dimensions = [];
+      for (let i = 0; i < this.dimensions.length; i++) {
+        dimensions[i] = this.dimensions[i].toHTML();
+      }
+      if (this.dotNotation) {
+        return '<span class="math-operator math-accessor-operator">.</span>' + '<span class="math-symbol math-property">' + (0, _string.escape)(this.getObjectProperty()) + '</span>';
+      } else {
+        return '<span class="math-parenthesis math-square-parenthesis">[</span>' + dimensions.join('<span class="math-separator">,</span>') + '<span class="math-parenthesis math-square-parenthesis">]</span>';
+      }
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const dimensions = this.dimensions.map(function (range) {
+        return range.toTex(options);
+      });
+      return this.dotNotation ? '.' + this.getObjectProperty() + '' : '_{' + dimensions.join(',') + '}';
+    }
+  }
+  (0, _defineProperty2.default)(IndexNode, "name", name);
+  return IndexNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/Node.js

@@ -0,0 +1,378 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createNode = void 0;
+var _is = require("../../utils/is.js");
+var _keywords = require("../keywords.js");
+var _object = require("../../utils/object.js");
+var _factory = require("../../utils/factory.js");
+var _map = require("../../utils/map.js");
+const name = 'Node';
+const dependencies = ['mathWithTransform'];
+const createNode = exports.createNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    mathWithTransform
+  } = _ref;
+  /**
+   * Validate the symbol names of a scope.
+   * Throws an error when the scope contains an illegal symbol.
+   * @param {Object} scope
+   */
+  function _validateScope(scope) {
+    for (const symbol of [..._keywords.keywords]) {
+      if (scope.has(symbol)) {
+        throw new Error('Scope contains an illegal symbol, "' + symbol + '" is a reserved keyword');
+      }
+    }
+  }
+  class Node {
+    get type() {
+      return 'Node';
+    }
+    get isNode() {
+      return true;
+    }
+
+    /**
+     * Evaluate the node
+     * @param {Object} [scope]  Scope to read/write variables
+     * @return {*}              Returns the result
+     */
+    evaluate(scope) {
+      return this.compile().evaluate(scope);
+    }
+
+    /**
+     * Compile the node into an optimized, evauatable JavaScript function
+     * @return {{evaluate: function([Object])}} object
+     *                Returns an object with a function 'evaluate',
+     *                which can be invoked as expr.evaluate([scope: Object]),
+     *                where scope is an optional object with
+     *                variables.
+     */
+    compile() {
+      const expr = this._compile(mathWithTransform, {});
+      const args = {};
+      const context = null;
+      function evaluate(scope) {
+        const s = (0, _map.createMap)(scope);
+        _validateScope(s);
+        return expr(s, args, context);
+      }
+      return {
+        evaluate
+      };
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      throw new Error('Method _compile must be implemented by type ' + this.type);
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      // must be implemented by each of the Node implementations
+      throw new Error('Cannot run forEach on a Node interface');
+    }
+
+    /**
+     * Create a new Node whose children are the results of calling the
+     * provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {OperatorNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      // must be implemented by each of the Node implementations
+      throw new Error('Cannot run map on a Node interface');
+    }
+
+    /**
+     * Validate whether an object is a Node, for use with map
+     * @param {Node} node
+     * @returns {Node} Returns the input if it's a node, else throws an Error
+     * @protected
+     */
+    _ifNode(node) {
+      if (!(0, _is.isNode)(node)) {
+        throw new TypeError('Callback function must return a Node');
+      }
+      return node;
+    }
+
+    /**
+     * Recursively traverse all nodes in a node tree. Executes given callback for
+     * this node and each of its child nodes.
+     * @param {function(node: Node, path: string, parent: Node)} callback
+     *          A callback called for every node in the node tree.
+     */
+    traverse(callback) {
+      // execute callback for itself
+      // eslint-disable-next-line
+      callback(this, null, null);
+
+      // recursively traverse over all children of a node
+      function _traverse(node, callback) {
+        node.forEach(function (child, path, parent) {
+          callback(child, path, parent);
+          _traverse(child, callback);
+        });
+      }
+      _traverse(this, callback);
+    }
+
+    /**
+     * Recursively transform a node tree via a transform function.
+     *
+     * For example, to replace all nodes of type SymbolNode having name 'x' with
+     * a ConstantNode with value 2:
+     *
+     *     const res = Node.transform(function (node, path, parent) {
+     *       if (node && node.isSymbolNode) && (node.name === 'x')) {
+     *         return new ConstantNode(2)
+     *       }
+     *       else {
+     *         return node
+     *       }
+     *     })
+     *
+     * @param {function(node: Node, path: string, parent: Node) : Node} callback
+     *          A mapping function accepting a node, and returning
+     *          a replacement for the node or the original node. The "signature"
+     *          of the callback must be:
+     *          callback(node: Node, index: string, parent: Node) : Node
+     * @return {Node} Returns the original node or its replacement
+     */
+    transform(callback) {
+      function _transform(child, path, parent) {
+        const replacement = callback(child, path, parent);
+        if (replacement !== child) {
+          // stop iterating when the node is replaced
+          return replacement;
+        }
+        return child.map(_transform);
+      }
+      return _transform(this, null, null);
+    }
+
+    /**
+     * Find any node in the node tree matching given filter function. For
+     * example, to find all nodes of type SymbolNode having name 'x':
+     *
+     *     const results = Node.filter(function (node) {
+     *       return (node && node.isSymbolNode) && (node.name === 'x')
+     *     })
+     *
+     * @param {function(node: Node, path: string, parent: Node) : Node} callback
+     *            A test function returning true when a node matches, and false
+     *            otherwise. Function signature:
+     *            callback(node: Node, index: string, parent: Node) : boolean
+     * @return {Node[]} nodes
+     *            An array with nodes matching given filter criteria
+     */
+    filter(callback) {
+      const nodes = [];
+      this.traverse(function (node, path, parent) {
+        if (callback(node, path, parent)) {
+          nodes.push(node);
+        }
+      });
+      return nodes;
+    }
+
+    /**
+     * Create a shallow clone of this node
+     * @return {Node}
+     */
+    clone() {
+      // must be implemented by each of the Node implementations
+      throw new Error('Cannot clone a Node interface');
+    }
+
+    /**
+     * Create a deep clone of this node
+     * @return {Node}
+     */
+    cloneDeep() {
+      return this.map(function (node) {
+        return node.cloneDeep();
+      });
+    }
+
+    /**
+     * Deep compare this node with another node.
+     * @param {Node} other
+     * @return {boolean} Returns true when both nodes are of the same type and
+     *                   contain the same values (as do their childs)
+     */
+    equals(other) {
+      return other ? this.type === other.type && (0, _object.deepStrictEqual)(this, other) : false;
+    }
+
+    /**
+     * Get string representation. (wrapper function)
+     *
+     * This function can get an object of the following form:
+     * {
+     *    handler: //This can be a callback function of the form
+     *             // "function callback(node, options)"or
+     *             // a map that maps function names (used in FunctionNodes)
+     *             // to callbacks
+     *    parenthesis: "keep" //the parenthesis option (This is optional)
+     * }
+     *
+     * @param {Object} [options]
+     * @return {string}
+     */
+    toString(options) {
+      const customString = this._getCustomString(options);
+      if (typeof customString !== 'undefined') {
+        return customString;
+      }
+      return this._toString(options);
+    }
+
+    /**
+     * Internal function to generate the string output.
+     * This has to be implemented by every Node
+     *
+     * @throws {Error}
+     */
+    _toString() {
+      // must be implemented by each of the Node implementations
+      throw new Error('_toString not implemented for ' + this.type);
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * Both .toJSON() and the static .fromJSON(json) should be implemented by all
+     * implementations of Node
+     * @returns {Object}
+     */
+    toJSON() {
+      throw new Error('Cannot serialize object: toJSON not implemented by ' + this.type);
+    }
+
+    /**
+     * Get HTML representation. (wrapper function)
+     *
+     * This function can get an object of the following form:
+     * {
+     *    handler: //This can be a callback function of the form
+     *             // "function callback(node, options)" or
+     *             // a map that maps function names (used in FunctionNodes)
+     *             // to callbacks
+     *    parenthesis: "keep" //the parenthesis option (This is optional)
+     * }
+     *
+     * @param {Object} [options]
+     * @return {string}
+     */
+    toHTML(options) {
+      const customString = this._getCustomString(options);
+      if (typeof customString !== 'undefined') {
+        return customString;
+      }
+      return this._toHTML(options);
+    }
+
+    /**
+     * Internal function to generate the HTML output.
+     * This has to be implemented by every Node
+     *
+     * @throws {Error}
+     */
+    _toHTML() {
+      // must be implemented by each of the Node implementations
+      throw new Error('_toHTML not implemented for ' + this.type);
+    }
+
+    /**
+     * Get LaTeX representation. (wrapper function)
+     *
+     * This function can get an object of the following form:
+     * {
+     *    handler: //This can be a callback function of the form
+     *             // "function callback(node, options)"or
+     *             // a map that maps function names (used in FunctionNodes)
+     *             // to callbacks
+     *    parenthesis: "keep" //the parenthesis option (This is optional)
+     * }
+     *
+     * @param {Object} [options]
+     * @return {string}
+     */
+    toTex(options) {
+      const customString = this._getCustomString(options);
+      if (typeof customString !== 'undefined') {
+        return customString;
+      }
+      return this._toTex(options);
+    }
+
+    /**
+     * Internal function to generate the LaTeX output.
+     * This has to be implemented by every Node
+     *
+     * @param {Object} [options]
+     * @throws {Error}
+     */
+    _toTex(options) {
+      // must be implemented by each of the Node implementations
+      throw new Error('_toTex not implemented for ' + this.type);
+    }
+
+    /**
+     * Helper used by `to...` functions.
+     */
+    _getCustomString(options) {
+      if (options && typeof options === 'object') {
+        switch (typeof options.handler) {
+          case 'object':
+          case 'undefined':
+            return;
+          case 'function':
+            return options.handler(this, options);
+          default:
+            throw new TypeError('Object or function expected as callback');
+        }
+      }
+    }
+
+    /**
+     * Get identifier.
+     * @return {string}
+     */
+    getIdentifier() {
+      return this.type;
+    }
+
+    /**
+     * Get the content of the current Node.
+     * @return {Node} node
+     **/
+    getContent() {
+      return this;
+    }
+  }
+  return Node;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/ObjectNode.js

@@ -0,0 +1,200 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createObjectNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _customs = require("../../utils/customs.js");
+var _factory = require("../../utils/factory.js");
+var _is = require("../../utils/is.js");
+var _object = require("../../utils/object.js");
+var _string = require("../../utils/string.js");
+const name = 'ObjectNode';
+const dependencies = ['Node'];
+const createObjectNode = exports.createObjectNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  class ObjectNode extends Node {
+    /**
+     * @constructor ObjectNode
+     * @extends {Node}
+     * Holds an object with keys/values
+     * @param {Object.<string, Node>} [properties]   object with key/value pairs
+     */
+    constructor(properties) {
+      super();
+      this.properties = properties || {};
+
+      // validate input
+      if (properties) {
+        if (!(typeof properties === 'object') || !Object.keys(properties).every(function (key) {
+          return (0, _is.isNode)(properties[key]);
+        })) {
+          throw new TypeError('Object containing Nodes expected');
+        }
+      }
+    }
+    get type() {
+      return name;
+    }
+    get isObjectNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const evalEntries = {};
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          // we stringify/parse the key here to resolve unicode characters,
+          // so you cannot create a key like {"co\\u006Estructor": null}
+          const stringifiedKey = (0, _string.stringify)(key);
+          const parsedKey = JSON.parse(stringifiedKey);
+          const prop = (0, _customs.getSafeProperty)(this.properties, key);
+          evalEntries[parsedKey] = prop._compile(math, argNames);
+        }
+      }
+      return function evalObjectNode(scope, args, context) {
+        const obj = {};
+        for (const key in evalEntries) {
+          if ((0, _object.hasOwnProperty)(evalEntries, key)) {
+            obj[key] = evalEntries[key](scope, args, context);
+          }
+        }
+        return obj;
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          callback(this.properties[key], 'properties[' + (0, _string.stringify)(key) + ']', this);
+        }
+      }
+    }
+
+    /**
+     * Create a new ObjectNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {ObjectNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const properties = {};
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          properties[key] = this._ifNode(callback(this.properties[key], 'properties[' + (0, _string.stringify)(key) + ']', this));
+        }
+      }
+      return new ObjectNode(properties);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {ObjectNode}
+     */
+    clone() {
+      const properties = {};
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          properties[key] = this.properties[key];
+        }
+      }
+      return new ObjectNode(properties);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toString(options) {
+      const entries = [];
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          entries.push((0, _string.stringify)(key) + ': ' + this.properties[key].toString(options));
+        }
+      }
+      return '{' + entries.join(', ') + '}';
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        properties: this.properties
+      };
+    }
+
+    /**
+     * Instantiate an OperatorNode from its JSON representation
+     * @param {Object} json  An object structured like
+     *                       `{"mathjs": "ObjectNode", "properties": {...}}`,
+     *                       where mathjs is optional
+     * @returns {ObjectNode}
+     */
+    static fromJSON(json) {
+      return new ObjectNode(json.properties);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toHTML(options) {
+      const entries = [];
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          entries.push('<span class="math-symbol math-property">' + (0, _string.escape)(key) + '</span>' + '<span class="math-operator math-assignment-operator ' + 'math-property-assignment-operator math-binary-operator">' + ':</span>' + this.properties[key].toHTML(options));
+        }
+      }
+      return '<span class="math-parenthesis math-curly-parenthesis">{</span>' + entries.join('<span class="math-separator">,</span>') + '<span class="math-parenthesis math-curly-parenthesis">}</span>';
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const entries = [];
+      for (const key in this.properties) {
+        if ((0, _object.hasOwnProperty)(this.properties, key)) {
+          entries.push('\\mathbf{' + key + ':} & ' + this.properties[key].toTex(options) + '\\\\');
+        }
+      }
+      const tex = '\\left\\{\\begin{array}{ll}' + entries.join('\n') + '\\end{array}\\right\\}';
+      return tex;
+    }
+  }
+  (0, _defineProperty2.default)(ObjectNode, "name", name);
+  return ObjectNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/OperatorNode.js

@@ -0,0 +1,636 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createOperatorNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _array = require("../../utils/array.js");
+var _scope = require("../../utils/scope.js");
+var _string = require("../../utils/string.js");
+var _customs = require("../../utils/customs.js");
+var _operators = require("../operators.js");
+var _latex = require("../../utils/latex.js");
+var _factory = require("../../utils/factory.js");
+const name = 'OperatorNode';
+const dependencies = ['Node'];
+const createOperatorNode = exports.createOperatorNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  /**
+   * Returns true if the expression starts with a constant, under
+   * the current parenthesization:
+   * @param {Node} expression
+   * @param {string} parenthesis
+   * @return {boolean}
+   */
+  function startsWithConstant(expr, parenthesis) {
+    let curNode = expr;
+    if (parenthesis === 'auto') {
+      while ((0, _is.isParenthesisNode)(curNode)) curNode = curNode.content;
+    }
+    if ((0, _is.isConstantNode)(curNode)) return true;
+    if ((0, _is.isOperatorNode)(curNode)) {
+      return startsWithConstant(curNode.args[0], parenthesis);
+    }
+    return false;
+  }
+
+  /**
+   * Calculate which parentheses are necessary. Gets an OperatorNode
+   * (which is the root of the tree) and an Array of Nodes
+   * (this.args) and returns an array where 'true' means that an argument
+   * has to be enclosed in parentheses whereas 'false' means the opposite.
+   *
+   * @param {OperatorNode} root
+   * @param {string} parenthesis
+   * @param {Node[]} args
+   * @param {boolean} latex
+   * @return {boolean[]}
+   * @private
+   */
+  function calculateNecessaryParentheses(root, parenthesis, implicit, args, latex) {
+    // precedence of the root OperatorNode
+    const precedence = (0, _operators.getPrecedence)(root, parenthesis, implicit);
+    const associativity = (0, _operators.getAssociativity)(root, parenthesis);
+    if (parenthesis === 'all' || args.length > 2 && root.getIdentifier() !== 'OperatorNode:add' && root.getIdentifier() !== 'OperatorNode:multiply') {
+      return args.map(function (arg) {
+        switch (arg.getContent().type) {
+          // Nodes that don't need extra parentheses
+          case 'ArrayNode':
+          case 'ConstantNode':
+          case 'SymbolNode':
+          case 'ParenthesisNode':
+            return false;
+          default:
+            return true;
+        }
+      });
+    }
+    let result;
+    switch (args.length) {
+      case 0:
+        result = [];
+        break;
+      case 1:
+        // unary operators
+        {
+          // precedence of the operand
+          const operandPrecedence = (0, _operators.getPrecedence)(args[0], parenthesis, implicit, root);
+
+          // handle special cases for LaTeX, where some of the parentheses aren't needed
+          if (latex && operandPrecedence !== null) {
+            let operandIdentifier;
+            let rootIdentifier;
+            if (parenthesis === 'keep') {
+              operandIdentifier = args[0].getIdentifier();
+              rootIdentifier = root.getIdentifier();
+            } else {
+              // Ignore Parenthesis Nodes when not in 'keep' mode
+              operandIdentifier = args[0].getContent().getIdentifier();
+              rootIdentifier = root.getContent().getIdentifier();
+            }
+            if (_operators.properties[precedence][rootIdentifier].latexLeftParens === false) {
+              result = [false];
+              break;
+            }
+            if (_operators.properties[operandPrecedence][operandIdentifier].latexParens === false) {
+              result = [false];
+              break;
+            }
+          }
+          if (operandPrecedence === null) {
+            // if the operand has no defined precedence, no parens are needed
+            result = [false];
+            break;
+          }
+          if (operandPrecedence <= precedence) {
+            // if the operands precedence is lower, parens are needed
+            result = [true];
+            break;
+          }
+
+          // otherwise, no parens needed
+          result = [false];
+        }
+        break;
+      case 2:
+        // binary operators
+        {
+          let lhsParens; // left hand side needs parenthesis?
+          // precedence of the left hand side
+          const lhsPrecedence = (0, _operators.getPrecedence)(args[0], parenthesis, implicit, root);
+          // is the root node associative with the left hand side
+          const assocWithLhs = (0, _operators.isAssociativeWith)(root, args[0], parenthesis);
+          if (lhsPrecedence === null) {
+            // if the left hand side has no defined precedence, no parens are needed
+            // FunctionNode for example
+            lhsParens = false;
+          } else if (lhsPrecedence === precedence && associativity === 'right' && !assocWithLhs) {
+            // In case of equal precedence, if the root node is left associative
+            // parens are **never** necessary for the left hand side.
+            // If it is right associative however, parens are necessary
+            // if the root node isn't associative with the left hand side
+            lhsParens = true;
+          } else if (lhsPrecedence < precedence) {
+            lhsParens = true;
+          } else {
+            lhsParens = false;
+          }
+          let rhsParens; // right hand side needs parenthesis?
+          // precedence of the right hand side
+          const rhsPrecedence = (0, _operators.getPrecedence)(args[1], parenthesis, implicit, root);
+          // is the root node associative with the right hand side?
+          const assocWithRhs = (0, _operators.isAssociativeWith)(root, args[1], parenthesis);
+          if (rhsPrecedence === null) {
+            // if the right hand side has no defined precedence, no parens are needed
+            // FunctionNode for example
+            rhsParens = false;
+          } else if (rhsPrecedence === precedence && associativity === 'left' && !assocWithRhs) {
+            // In case of equal precedence, if the root node is right associative
+            // parens are **never** necessary for the right hand side.
+            // If it is left associative however, parens are necessary
+            // if the root node isn't associative with the right hand side
+            rhsParens = true;
+          } else if (rhsPrecedence < precedence) {
+            rhsParens = true;
+          } else {
+            rhsParens = false;
+          }
+
+          // handle special cases for LaTeX, where some of the parentheses aren't needed
+          if (latex) {
+            let rootIdentifier;
+            let lhsIdentifier;
+            let rhsIdentifier;
+            if (parenthesis === 'keep') {
+              rootIdentifier = root.getIdentifier();
+              lhsIdentifier = root.args[0].getIdentifier();
+              rhsIdentifier = root.args[1].getIdentifier();
+            } else {
+              // Ignore ParenthesisNodes when not in 'keep' mode
+              rootIdentifier = root.getContent().getIdentifier();
+              lhsIdentifier = root.args[0].getContent().getIdentifier();
+              rhsIdentifier = root.args[1].getContent().getIdentifier();
+            }
+            if (lhsPrecedence !== null) {
+              if (_operators.properties[precedence][rootIdentifier].latexLeftParens === false) {
+                lhsParens = false;
+              }
+              if (_operators.properties[lhsPrecedence][lhsIdentifier].latexParens === false) {
+                lhsParens = false;
+              }
+            }
+            if (rhsPrecedence !== null) {
+              if (_operators.properties[precedence][rootIdentifier].latexRightParens === false) {
+                rhsParens = false;
+              }
+              if (_operators.properties[rhsPrecedence][rhsIdentifier].latexParens === false) {
+                rhsParens = false;
+              }
+            }
+          }
+          result = [lhsParens, rhsParens];
+        }
+        break;
+      default:
+        if (root.getIdentifier() === 'OperatorNode:add' || root.getIdentifier() === 'OperatorNode:multiply') {
+          result = args.map(function (arg) {
+            const argPrecedence = (0, _operators.getPrecedence)(arg, parenthesis, implicit, root);
+            const assocWithArg = (0, _operators.isAssociativeWith)(root, arg, parenthesis);
+            const argAssociativity = (0, _operators.getAssociativity)(arg, parenthesis);
+            if (argPrecedence === null) {
+              // if the argument has no defined precedence, no parens are needed
+              return false;
+            } else if (precedence === argPrecedence && associativity === argAssociativity && !assocWithArg) {
+              return true;
+            } else if (argPrecedence < precedence) {
+              return true;
+            }
+            return false;
+          });
+        }
+        break;
+    }
+
+    // Handles an edge case of parentheses with implicit multiplication
+    // of ConstantNode.
+    // In that case, parenthesize ConstantNodes that follow an unparenthesized
+    // expression, even though they normally wouldn't be printed.
+    if (args.length >= 2 && root.getIdentifier() === 'OperatorNode:multiply' && root.implicit && parenthesis !== 'all' && implicit === 'hide') {
+      for (let i = 1; i < result.length; ++i) {
+        if (startsWithConstant(args[i], parenthesis) && !result[i - 1] && (parenthesis !== 'keep' || !(0, _is.isParenthesisNode)(args[i - 1]))) {
+          result[i] = true;
+        }
+      }
+    }
+    return result;
+  }
+  class OperatorNode extends Node {
+    /**
+     * @constructor OperatorNode
+     * @extends {Node}
+     * An operator with two arguments, like 2+3
+     *
+     * @param {string} op           Operator name, for example '+'
+     * @param {string} fn           Function name, for example 'add'
+     * @param {Node[]} args         Operator arguments
+     * @param {boolean} [implicit]  Is this an implicit multiplication?
+     * @param {boolean} [isPercentage] Is this an percentage Operation?
+     */
+    constructor(op, fn, args, implicit, isPercentage) {
+      super();
+      // validate input
+      if (typeof op !== 'string') {
+        throw new TypeError('string expected for parameter "op"');
+      }
+      if (typeof fn !== 'string') {
+        throw new TypeError('string expected for parameter "fn"');
+      }
+      if (!Array.isArray(args) || !args.every(_is.isNode)) {
+        throw new TypeError('Array containing Nodes expected for parameter "args"');
+      }
+      this.implicit = implicit === true;
+      this.isPercentage = isPercentage === true;
+      this.op = op;
+      this.fn = fn;
+      this.args = args || [];
+    }
+    get type() {
+      return name;
+    }
+    get isOperatorNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      // validate fn
+      if (typeof this.fn !== 'string' || !(0, _customs.isSafeMethod)(math, this.fn)) {
+        if (!math[this.fn]) {
+          throw new Error('Function ' + this.fn + ' missing in provided namespace "math"');
+        } else {
+          throw new Error('No access to function "' + this.fn + '"');
+        }
+      }
+      const fn = (0, _customs.getSafeProperty)(math, this.fn);
+      const evalArgs = (0, _array.map)(this.args, function (arg) {
+        return arg._compile(math, argNames);
+      });
+      if (typeof fn === 'function' && fn.rawArgs === true) {
+        // pass unevaluated parameters (nodes) to the function
+        // "raw" evaluation
+        const rawArgs = this.args;
+        return function evalOperatorNode(scope, args, context) {
+          return fn(rawArgs, math, (0, _scope.createSubScope)(scope, args));
+        };
+      } else if (evalArgs.length === 1) {
+        const evalArg0 = evalArgs[0];
+        return function evalOperatorNode(scope, args, context) {
+          return fn(evalArg0(scope, args, context));
+        };
+      } else if (evalArgs.length === 2) {
+        const evalArg0 = evalArgs[0];
+        const evalArg1 = evalArgs[1];
+        return function evalOperatorNode(scope, args, context) {
+          return fn(evalArg0(scope, args, context), evalArg1(scope, args, context));
+        };
+      } else {
+        return function evalOperatorNode(scope, args, context) {
+          return fn.apply(null, (0, _array.map)(evalArgs, function (evalArg) {
+            return evalArg(scope, args, context);
+          }));
+        };
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      for (let i = 0; i < this.args.length; i++) {
+        callback(this.args[i], 'args[' + i + ']', this);
+      }
+    }
+
+    /**
+     * Create a new OperatorNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {OperatorNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      const args = [];
+      for (let i = 0; i < this.args.length; i++) {
+        args[i] = this._ifNode(callback(this.args[i], 'args[' + i + ']', this));
+      }
+      return new OperatorNode(this.op, this.fn, args, this.implicit, this.isPercentage);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {OperatorNode}
+     */
+    clone() {
+      return new OperatorNode(this.op, this.fn, this.args.slice(0), this.implicit, this.isPercentage);
+    }
+
+    /**
+     * Check whether this is an unary OperatorNode:
+     * has exactly one argument, like `-a`.
+     * @return {boolean}
+     *     Returns true when an unary operator node, false otherwise.
+     */
+    isUnary() {
+      return this.args.length === 1;
+    }
+
+    /**
+     * Check whether this is a binary OperatorNode:
+     * has exactly two arguments, like `a + b`.
+     * @return {boolean}
+     *     Returns true when a binary operator node, false otherwise.
+     */
+    isBinary() {
+      return this.args.length === 2;
+    }
+
+    /**
+     * Get string representation.
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const implicit = options && options.implicit ? options.implicit : 'hide';
+      const args = this.args;
+      const parens = calculateNecessaryParentheses(this, parenthesis, implicit, args, false);
+      if (args.length === 1) {
+        // unary operators
+        const assoc = (0, _operators.getAssociativity)(this, parenthesis);
+        let operand = args[0].toString(options);
+        if (parens[0]) {
+          operand = '(' + operand + ')';
+        }
+
+        // for example for "not", we want a space between operand and argument
+        const opIsNamed = /[a-zA-Z]+/.test(this.op);
+        if (assoc === 'right') {
+          // prefix operator
+          return this.op + (opIsNamed ? ' ' : '') + operand;
+        } else if (assoc === 'left') {
+          // postfix
+          return operand + (opIsNamed ? ' ' : '') + this.op;
+        }
+
+        // fall back to postfix
+        return operand + this.op;
+      } else if (args.length === 2) {
+        let lhs = args[0].toString(options); // left hand side
+        let rhs = args[1].toString(options); // right hand side
+        if (parens[0]) {
+          // left hand side in parenthesis?
+          lhs = '(' + lhs + ')';
+        }
+        if (parens[1]) {
+          // right hand side in parenthesis?
+          rhs = '(' + rhs + ')';
+        }
+        if (this.implicit && this.getIdentifier() === 'OperatorNode:multiply' && implicit === 'hide') {
+          return lhs + ' ' + rhs;
+        }
+        return lhs + ' ' + this.op + ' ' + rhs;
+      } else if (args.length > 2 && (this.getIdentifier() === 'OperatorNode:add' || this.getIdentifier() === 'OperatorNode:multiply')) {
+        const stringifiedArgs = args.map(function (arg, index) {
+          arg = arg.toString(options);
+          if (parens[index]) {
+            // put in parenthesis?
+            arg = '(' + arg + ')';
+          }
+          return arg;
+        });
+        if (this.implicit && this.getIdentifier() === 'OperatorNode:multiply' && implicit === 'hide') {
+          return stringifiedArgs.join(' ');
+        }
+        return stringifiedArgs.join(' ' + this.op + ' ');
+      } else {
+        // fallback to formatting as a function call
+        return this.fn + '(' + this.args.join(', ') + ')';
+      }
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        op: this.op,
+        fn: this.fn,
+        args: this.args,
+        implicit: this.implicit,
+        isPercentage: this.isPercentage
+      };
+    }
+
+    /**
+     * Instantiate an OperatorNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     ```
+     *     {"mathjs": "OperatorNode",
+     *      "op": "+", "fn": "add", "args": [...],
+     *      "implicit": false,
+     *      "isPercentage":false}
+     *     ```
+     *     where mathjs is optional
+     * @returns {OperatorNode}
+     */
+    static fromJSON(json) {
+      return new OperatorNode(json.op, json.fn, json.args, json.implicit, json.isPercentage);
+    }
+
+    /**
+     * Get HTML representation.
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const implicit = options && options.implicit ? options.implicit : 'hide';
+      const args = this.args;
+      const parens = calculateNecessaryParentheses(this, parenthesis, implicit, args, false);
+      if (args.length === 1) {
+        // unary operators
+        const assoc = (0, _operators.getAssociativity)(this, parenthesis);
+        let operand = args[0].toHTML(options);
+        if (parens[0]) {
+          operand = '<span class="math-parenthesis math-round-parenthesis">(</span>' + operand + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+        }
+        if (assoc === 'right') {
+          // prefix operator
+          return '<span class="math-operator math-unary-operator ' + 'math-lefthand-unary-operator">' + (0, _string.escape)(this.op) + '</span>' + operand;
+        } else {
+          // postfix when assoc === 'left' or undefined
+          return operand + '<span class="math-operator math-unary-operator ' + 'math-righthand-unary-operator">' + (0, _string.escape)(this.op) + '</span>';
+        }
+      } else if (args.length === 2) {
+        // binary operatoes
+        let lhs = args[0].toHTML(options); // left hand side
+        let rhs = args[1].toHTML(options); // right hand side
+        if (parens[0]) {
+          // left hand side in parenthesis?
+          lhs = '<span class="math-parenthesis math-round-parenthesis">(</span>' + lhs + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+        }
+        if (parens[1]) {
+          // right hand side in parenthesis?
+          rhs = '<span class="math-parenthesis math-round-parenthesis">(</span>' + rhs + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+        }
+        if (this.implicit && this.getIdentifier() === 'OperatorNode:multiply' && implicit === 'hide') {
+          return lhs + '<span class="math-operator math-binary-operator ' + 'math-implicit-binary-operator"></span>' + rhs;
+        }
+        return lhs + '<span class="math-operator math-binary-operator ' + 'math-explicit-binary-operator">' + (0, _string.escape)(this.op) + '</span>' + rhs;
+      } else {
+        const stringifiedArgs = args.map(function (arg, index) {
+          arg = arg.toHTML(options);
+          if (parens[index]) {
+            // put in parenthesis?
+            arg = '<span class="math-parenthesis math-round-parenthesis">(</span>' + arg + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+          }
+          return arg;
+        });
+        if (args.length > 2 && (this.getIdentifier() === 'OperatorNode:add' || this.getIdentifier() === 'OperatorNode:multiply')) {
+          if (this.implicit && this.getIdentifier() === 'OperatorNode:multiply' && implicit === 'hide') {
+            return stringifiedArgs.join('<span class="math-operator math-binary-operator ' + 'math-implicit-binary-operator"></span>');
+          }
+          return stringifiedArgs.join('<span class="math-operator math-binary-operator ' + 'math-explicit-binary-operator">' + (0, _string.escape)(this.op) + '</span>');
+        } else {
+          // fallback to formatting as a function call
+          return '<span class="math-function">' + (0, _string.escape)(this.fn) + '</span><span class="math-paranthesis math-round-parenthesis">' + '(</span>' + stringifiedArgs.join('<span class="math-separator">,</span>') + '<span class="math-paranthesis math-round-parenthesis">)</span>';
+        }
+      }
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const implicit = options && options.implicit ? options.implicit : 'hide';
+      const args = this.args;
+      const parens = calculateNecessaryParentheses(this, parenthesis, implicit, args, true);
+      let op = _latex.latexOperators[this.fn];
+      op = typeof op === 'undefined' ? this.op : op; // fall back to using this.op
+
+      if (args.length === 1) {
+        // unary operators
+        const assoc = (0, _operators.getAssociativity)(this, parenthesis);
+        let operand = args[0].toTex(options);
+        if (parens[0]) {
+          operand = `\\left(${operand}\\right)`;
+        }
+        if (assoc === 'right') {
+          // prefix operator
+          return op + operand;
+        } else if (assoc === 'left') {
+          // postfix operator
+          return operand + op;
+        }
+
+        // fall back to postfix
+        return operand + op;
+      } else if (args.length === 2) {
+        // binary operators
+        const lhs = args[0]; // left hand side
+        let lhsTex = lhs.toTex(options);
+        if (parens[0]) {
+          lhsTex = `\\left(${lhsTex}\\right)`;
+        }
+        const rhs = args[1]; // right hand side
+        let rhsTex = rhs.toTex(options);
+        if (parens[1]) {
+          rhsTex = `\\left(${rhsTex}\\right)`;
+        }
+
+        // handle some exceptions (due to the way LaTeX works)
+        let lhsIdentifier;
+        if (parenthesis === 'keep') {
+          lhsIdentifier = lhs.getIdentifier();
+        } else {
+          // Ignore ParenthesisNodes if in 'keep' mode
+          lhsIdentifier = lhs.getContent().getIdentifier();
+        }
+        switch (this.getIdentifier()) {
+          case 'OperatorNode:divide':
+            // op contains '\\frac' at this point
+            return op + '{' + lhsTex + '}' + '{' + rhsTex + '}';
+          case 'OperatorNode:pow':
+            lhsTex = '{' + lhsTex + '}';
+            rhsTex = '{' + rhsTex + '}';
+            switch (lhsIdentifier) {
+              case 'ConditionalNode': //
+              case 'OperatorNode:divide':
+                lhsTex = `\\left(${lhsTex}\\right)`;
+            }
+            break;
+          case 'OperatorNode:multiply':
+            if (this.implicit && implicit === 'hide') {
+              return lhsTex + '~' + rhsTex;
+            }
+        }
+        return lhsTex + op + rhsTex;
+      } else if (args.length > 2 && (this.getIdentifier() === 'OperatorNode:add' || this.getIdentifier() === 'OperatorNode:multiply')) {
+        const texifiedArgs = args.map(function (arg, index) {
+          arg = arg.toTex(options);
+          if (parens[index]) {
+            arg = `\\left(${arg}\\right)`;
+          }
+          return arg;
+        });
+        if (this.getIdentifier() === 'OperatorNode:multiply' && this.implicit && implicit === 'hide') {
+          return texifiedArgs.join('~');
+        }
+        return texifiedArgs.join(op);
+      } else {
+        // fall back to formatting as a function call
+        // as this is a fallback, it doesn't use
+        // fancy function names
+        return '\\mathrm{' + this.fn + '}\\left(' + args.map(function (arg) {
+          return arg.toTex(options);
+        }).join(',') + '\\right)';
+      }
+    }
+
+    /**
+     * Get identifier.
+     * @return {string}
+     */
+    getIdentifier() {
+      return this.type + ':' + this.fn;
+    }
+  }
+  (0, _defineProperty2.default)(OperatorNode, "name", name);
+  return OperatorNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/ParenthesisNode.js

@@ -0,0 +1,159 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createParenthesisNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _factory = require("../../utils/factory.js");
+const name = 'ParenthesisNode';
+const dependencies = ['Node'];
+const createParenthesisNode = exports.createParenthesisNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  class ParenthesisNode extends Node {
+    /**
+     * @constructor ParenthesisNode
+     * @extends {Node}
+     * A parenthesis node describes manual parenthesis from the user input
+     * @param {Node} content
+     * @extends {Node}
+     */
+    constructor(content) {
+      super();
+      // validate input
+      if (!(0, _is.isNode)(content)) {
+        throw new TypeError('Node expected for parameter "content"');
+      }
+      this.content = content;
+    }
+    get type() {
+      return name;
+    }
+    get isParenthesisNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      return this.content._compile(math, argNames);
+    }
+
+    /**
+     * Get the content of the current Node.
+     * @return {Node} content
+     * @override
+     **/
+    getContent() {
+      return this.content.getContent();
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.content, 'content', this);
+    }
+
+    /**
+     * Create a new ParenthesisNode whose child is the result of calling
+     * the provided callback function on the child of this node.
+     * @param {function(child: Node, path: string, parent: Node) : Node} callback
+     * @returns {ParenthesisNode} Returns a clone of the node
+     */
+    map(callback) {
+      const content = callback(this.content, 'content', this);
+      return new ParenthesisNode(content);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {ParenthesisNode}
+     */
+    clone() {
+      return new ParenthesisNode(this.content);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toString(options) {
+      if (!options || options && !options.parenthesis || options && options.parenthesis === 'keep') {
+        return '(' + this.content.toString(options) + ')';
+      }
+      return this.content.toString(options);
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        content: this.content
+      };
+    }
+
+    /**
+     * Instantiate an ParenthesisNode from its JSON representation
+     * @param {Object} json  An object structured like
+     *                       `{"mathjs": "ParenthesisNode", "content": ...}`,
+     *                       where mathjs is optional
+     * @returns {ParenthesisNode}
+     */
+    static fromJSON(json) {
+      return new ParenthesisNode(json.content);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toHTML(options) {
+      if (!options || options && !options.parenthesis || options && options.parenthesis === 'keep') {
+        return '<span class="math-parenthesis math-round-parenthesis">(</span>' + this.content.toHTML(options) + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      return this.content.toHTML(options);
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toTex(options) {
+      if (!options || options && !options.parenthesis || options && options.parenthesis === 'keep') {
+        return `\\left(${this.content.toTex(options)}\\right)`;
+      }
+      return this.content.toTex(options);
+    }
+  }
+  (0, _defineProperty2.default)(ParenthesisNode, "name", name);
+  return ParenthesisNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/RangeNode.js

@@ -0,0 +1,257 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createRangeNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _is = require("../../utils/is.js");
+var _factory = require("../../utils/factory.js");
+var _operators = require("../operators.js");
+const name = 'RangeNode';
+const dependencies = ['Node'];
+const createRangeNode = exports.createRangeNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  /**
+   * Calculate the necessary parentheses
+   * @param {Node} node
+   * @param {string} parenthesis
+   * @param {string} implicit
+   * @return {Object} parentheses
+   * @private
+   */
+  function calculateNecessaryParentheses(node, parenthesis, implicit) {
+    const precedence = (0, _operators.getPrecedence)(node, parenthesis, implicit);
+    const parens = {};
+    const startPrecedence = (0, _operators.getPrecedence)(node.start, parenthesis, implicit);
+    parens.start = startPrecedence !== null && startPrecedence <= precedence || parenthesis === 'all';
+    if (node.step) {
+      const stepPrecedence = (0, _operators.getPrecedence)(node.step, parenthesis, implicit);
+      parens.step = stepPrecedence !== null && stepPrecedence <= precedence || parenthesis === 'all';
+    }
+    const endPrecedence = (0, _operators.getPrecedence)(node.end, parenthesis, implicit);
+    parens.end = endPrecedence !== null && endPrecedence <= precedence || parenthesis === 'all';
+    return parens;
+  }
+  class RangeNode extends Node {
+    /**
+     * @constructor RangeNode
+     * @extends {Node}
+     * create a range
+     * @param {Node} start  included lower-bound
+     * @param {Node} end    included upper-bound
+     * @param {Node} [step] optional step
+     */
+    constructor(start, end, step) {
+      super();
+      // validate inputs
+      if (!(0, _is.isNode)(start)) throw new TypeError('Node expected');
+      if (!(0, _is.isNode)(end)) throw new TypeError('Node expected');
+      if (step && !(0, _is.isNode)(step)) throw new TypeError('Node expected');
+      if (arguments.length > 3) throw new Error('Too many arguments');
+      this.start = start; // included lower-bound
+      this.end = end; // included upper-bound
+      this.step = step || null; // optional step
+    }
+    get type() {
+      return name;
+    }
+    get isRangeNode() {
+      return true;
+    }
+
+    /**
+     * Check whether the RangeNode needs the `end` symbol to be defined.
+     * This end is the size of the Matrix in current dimension.
+     * @return {boolean}
+     */
+    needsEnd() {
+      // find all `end` symbols in this RangeNode
+      const endSymbols = this.filter(function (node) {
+        return (0, _is.isSymbolNode)(node) && node.name === 'end';
+      });
+      return endSymbols.length > 0;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const range = math.range;
+      const evalStart = this.start._compile(math, argNames);
+      const evalEnd = this.end._compile(math, argNames);
+      if (this.step) {
+        const evalStep = this.step._compile(math, argNames);
+        return function evalRangeNode(scope, args, context) {
+          return range(evalStart(scope, args, context), evalEnd(scope, args, context), evalStep(scope, args, context));
+        };
+      } else {
+        return function evalRangeNode(scope, args, context) {
+          return range(evalStart(scope, args, context), evalEnd(scope, args, context));
+        };
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      callback(this.start, 'start', this);
+      callback(this.end, 'end', this);
+      if (this.step) {
+        callback(this.step, 'step', this);
+      }
+    }
+
+    /**
+     * Create a new RangeNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {RangeNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      return new RangeNode(this._ifNode(callback(this.start, 'start', this)), this._ifNode(callback(this.end, 'end', this)), this.step && this._ifNode(callback(this.step, 'step', this)));
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {RangeNode}
+     */
+    clone() {
+      return new RangeNode(this.start, this.end, this.step && this.step);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
+
+      // format string as start:step:stop
+      let str;
+      let start = this.start.toString(options);
+      if (parens.start) {
+        start = '(' + start + ')';
+      }
+      str = start;
+      if (this.step) {
+        let step = this.step.toString(options);
+        if (parens.step) {
+          step = '(' + step + ')';
+        }
+        str += ':' + step;
+      }
+      let end = this.end.toString(options);
+      if (parens.end) {
+        end = '(' + end + ')';
+      }
+      str += ':' + end;
+      return str;
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        start: this.start,
+        end: this.end,
+        step: this.step
+      };
+    }
+
+    /**
+     * Instantiate an RangeNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     `{"mathjs": "RangeNode", "start": ..., "end": ..., "step": ...}`,
+     *     where mathjs is optional
+     * @returns {RangeNode}
+     */
+    static fromJSON(json) {
+      return new RangeNode(json.start, json.end, json.step);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
+
+      // format string as start:step:stop
+      let str;
+      let start = this.start.toHTML(options);
+      if (parens.start) {
+        start = '<span class="math-parenthesis math-round-parenthesis">(</span>' + start + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      str = start;
+      if (this.step) {
+        let step = this.step.toHTML(options);
+        if (parens.step) {
+          step = '<span class="math-parenthesis math-round-parenthesis">(</span>' + step + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+        }
+        str += '<span class="math-operator math-range-operator">:</span>' + step;
+      }
+      let end = this.end.toHTML(options);
+      if (parens.end) {
+        end = '<span class="math-parenthesis math-round-parenthesis">(</span>' + end + '<span class="math-parenthesis math-round-parenthesis">)</span>';
+      }
+      str += '<span class="math-operator math-range-operator">:</span>' + end;
+      return str;
+    }
+
+    /**
+     * Get LaTeX representation
+     * @params {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const parens = calculateNecessaryParentheses(this, parenthesis, options && options.implicit);
+      let str = this.start.toTex(options);
+      if (parens.start) {
+        str = `\\left(${str}\\right)`;
+      }
+      if (this.step) {
+        let step = this.step.toTex(options);
+        if (parens.step) {
+          step = `\\left(${step}\\right)`;
+        }
+        str += ':' + step;
+      }
+      let end = this.end.toTex(options);
+      if (parens.end) {
+        end = `\\left(${end}\\right)`;
+      }
+      str += ':' + end;
+      return str;
+    }
+  }
+  (0, _defineProperty2.default)(RangeNode, "name", name);
+  return RangeNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/RelationalNode.js

@@ -0,0 +1,205 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createRelationalNode = void 0;
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+var _operators = require("../operators.js");
+var _string = require("../../utils/string.js");
+var _customs = require("../../utils/customs.js");
+var _latex = require("../../utils/latex.js");
+var _factory = require("../../utils/factory.js");
+const name = 'RelationalNode';
+const dependencies = ['Node'];
+const createRelationalNode = exports.createRelationalNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    Node
+  } = _ref;
+  const operatorMap = {
+    equal: '==',
+    unequal: '!=',
+    smaller: '<',
+    larger: '>',
+    smallerEq: '<=',
+    largerEq: '>='
+  };
+  class RelationalNode extends Node {
+    /**
+     * A node representing a chained conditional expression, such as 'x > y > z'
+     *
+     * @param {String[]} conditionals
+     *     An array of conditional operators used to compare the parameters
+     * @param {Node[]} params
+     *     The parameters that will be compared
+     *
+     * @constructor RelationalNode
+     * @extends {Node}
+     */
+    constructor(conditionals, params) {
+      super();
+      if (!Array.isArray(conditionals)) {
+        throw new TypeError('Parameter conditionals must be an array');
+      }
+      if (!Array.isArray(params)) {
+        throw new TypeError('Parameter params must be an array');
+      }
+      if (conditionals.length !== params.length - 1) {
+        throw new TypeError('Parameter params must contain exactly one more element ' + 'than parameter conditionals');
+      }
+      this.conditionals = conditionals;
+      this.params = params;
+    }
+    get type() {
+      return name;
+    }
+    get isRelationalNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const self = this;
+      const compiled = this.params.map(p => p._compile(math, argNames));
+      return function evalRelationalNode(scope, args, context) {
+        let evalLhs;
+        let evalRhs = compiled[0](scope, args, context);
+        for (let i = 0; i < self.conditionals.length; i++) {
+          evalLhs = evalRhs;
+          evalRhs = compiled[i + 1](scope, args, context);
+          const condFn = (0, _customs.getSafeProperty)(math, self.conditionals[i]);
+          if (!condFn(evalLhs, evalRhs)) {
+            return false;
+          }
+        }
+        return true;
+      };
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      this.params.forEach((n, i) => callback(n, 'params[' + i + ']', this), this);
+    }
+
+    /**
+     * Create a new RelationalNode whose children are the results of calling
+     * the provided callback function for each child of the original node.
+     * @param {function(child: Node, path: string, parent: Node): Node} callback
+     * @returns {RelationalNode} Returns a transformed copy of the node
+     */
+    map(callback) {
+      return new RelationalNode(this.conditionals.slice(), this.params.map((n, i) => this._ifNode(callback(n, 'params[' + i + ']', this)), this));
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {RelationalNode}
+     */
+    clone() {
+      return new RelationalNode(this.conditionals, this.params);
+    }
+
+    /**
+     * Get string representation.
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toString(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const precedence = (0, _operators.getPrecedence)(this, parenthesis, options && options.implicit);
+      const paramStrings = this.params.map(function (p, index) {
+        const paramPrecedence = (0, _operators.getPrecedence)(p, parenthesis, options && options.implicit);
+        return parenthesis === 'all' || paramPrecedence !== null && paramPrecedence <= precedence ? '(' + p.toString(options) + ')' : p.toString(options);
+      });
+      let ret = paramStrings[0];
+      for (let i = 0; i < this.conditionals.length; i++) {
+        ret += ' ' + operatorMap[this.conditionals[i]];
+        ret += ' ' + paramStrings[i + 1];
+      }
+      return ret;
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: name,
+        conditionals: this.conditionals,
+        params: this.params
+      };
+    }
+
+    /**
+     * Instantiate a RelationalNode from its JSON representation
+     * @param {Object} json
+     *     An object structured like
+     *     `{"mathjs": "RelationalNode", "conditionals": ..., "params": ...}`,
+     *     where mathjs is optional
+     * @returns {RelationalNode}
+     */
+    static fromJSON(json) {
+      return new RelationalNode(json.conditionals, json.params);
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toHTML(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const precedence = (0, _operators.getPrecedence)(this, parenthesis, options && options.implicit);
+      const paramStrings = this.params.map(function (p, index) {
+        const paramPrecedence = (0, _operators.getPrecedence)(p, parenthesis, options && options.implicit);
+        return parenthesis === 'all' || paramPrecedence !== null && paramPrecedence <= precedence ? '<span class="math-parenthesis math-round-parenthesis">(</span>' + p.toHTML(options) + '<span class="math-parenthesis math-round-parenthesis">)</span>' : p.toHTML(options);
+      });
+      let ret = paramStrings[0];
+      for (let i = 0; i < this.conditionals.length; i++) {
+        ret += '<span class="math-operator math-binary-operator ' + 'math-explicit-binary-operator">' + (0, _string.escape)(operatorMap[this.conditionals[i]]) + '</span>' + paramStrings[i + 1];
+      }
+      return ret;
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     */
+    _toTex(options) {
+      const parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
+      const precedence = (0, _operators.getPrecedence)(this, parenthesis, options && options.implicit);
+      const paramStrings = this.params.map(function (p, index) {
+        const paramPrecedence = (0, _operators.getPrecedence)(p, parenthesis, options && options.implicit);
+        return parenthesis === 'all' || paramPrecedence !== null && paramPrecedence <= precedence ? '\\left(' + p.toTex(options) + '\right)' : p.toTex(options);
+      });
+      let ret = paramStrings[0];
+      for (let i = 0; i < this.conditionals.length; i++) {
+        ret += _latex.latexOperators[this.conditionals[i]] + paramStrings[i + 1];
+      }
+      return ret;
+    }
+  }
+  (0, _defineProperty2.default)(RelationalNode, "name", name);
+  return RelationalNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/SymbolNode.js

@@ -0,0 +1,199 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createSymbolNode = void 0;
+var _string = require("../../utils/string.js");
+var _customs = require("../../utils/customs.js");
+var _factory = require("../../utils/factory.js");
+var _latex = require("../../utils/latex.js");
+const name = 'SymbolNode';
+const dependencies = ['math', '?Unit', 'Node'];
+const createSymbolNode = exports.createSymbolNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    math,
+    Unit,
+    Node
+  } = _ref;
+  /**
+   * Check whether some name is a valueless unit like "inch".
+   * @param {string} name
+   * @return {boolean}
+   */
+  function isValuelessUnit(name) {
+    return Unit ? Unit.isValuelessUnit(name) : false;
+  }
+  class SymbolNode extends Node {
+    /**
+     * @constructor SymbolNode
+     * @extends {Node}
+     * A symbol node can hold and resolve a symbol
+     * @param {string} name
+     * @extends {Node}
+     */
+    constructor(name) {
+      super();
+      // validate input
+      if (typeof name !== 'string') {
+        throw new TypeError('String expected for parameter "name"');
+      }
+      this.name = name;
+    }
+    get type() {
+      return 'SymbolNode';
+    }
+    get isSymbolNode() {
+      return true;
+    }
+
+    /**
+     * Compile a node into a JavaScript function.
+     * This basically pre-calculates as much as possible and only leaves open
+     * calculations which depend on a dynamic scope with variables.
+     * @param {Object} math     Math.js namespace with functions and constants.
+     * @param {Object} argNames An object with argument names as key and `true`
+     *                          as value. Used in the SymbolNode to optimize
+     *                          for arguments from user assigned functions
+     *                          (see FunctionAssignmentNode) or special symbols
+     *                          like `end` (see IndexNode).
+     * @return {function} Returns a function which can be called like:
+     *                        evalNode(scope: Object, args: Object, context: *)
+     */
+    _compile(math, argNames) {
+      const name = this.name;
+      if (argNames[name] === true) {
+        // this is a FunctionAssignment argument
+        // (like an x when inside the expression of a function
+        // assignment `f(x) = ...`)
+        return function (scope, args, context) {
+          return (0, _customs.getSafeProperty)(args, name);
+        };
+      } else if (name in math) {
+        return function (scope, args, context) {
+          return scope.has(name) ? scope.get(name) : (0, _customs.getSafeProperty)(math, name);
+        };
+      } else {
+        const isUnit = isValuelessUnit(name);
+        return function (scope, args, context) {
+          return scope.has(name) ? scope.get(name) : isUnit ? new Unit(null, name) : SymbolNode.onUndefinedSymbol(name);
+        };
+      }
+    }
+
+    /**
+     * Execute a callback for each of the child nodes of this node
+     * @param {function(child: Node, path: string, parent: Node)} callback
+     */
+    forEach(callback) {
+      // nothing to do, we don't have any children
+    }
+
+    /**
+     * Create a new SymbolNode with children produced by the given callback.
+     * Trivial since a SymbolNode has no children
+     * @param {function(child: Node, path: string, parent: Node) : Node} callback
+     * @returns {SymbolNode} Returns a clone of the node
+     */
+    map(callback) {
+      return this.clone();
+    }
+
+    /**
+     * Throws an error 'Undefined symbol {name}'
+     * @param {string} name
+     */
+    static onUndefinedSymbol(name) {
+      throw new Error('Undefined symbol ' + name);
+    }
+
+    /**
+     * Create a clone of this node, a shallow copy
+     * @return {SymbolNode}
+     */
+    clone() {
+      return new SymbolNode(this.name);
+    }
+
+    /**
+     * Get string representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toString(options) {
+      return this.name;
+    }
+
+    /**
+     * Get HTML representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toHTML(options) {
+      const name = (0, _string.escape)(this.name);
+      if (name === 'true' || name === 'false') {
+        return '<span class="math-symbol math-boolean">' + name + '</span>';
+      } else if (name === 'i') {
+        return '<span class="math-symbol math-imaginary-symbol">' + name + '</span>';
+      } else if (name === 'Infinity') {
+        return '<span class="math-symbol math-infinity-symbol">' + name + '</span>';
+      } else if (name === 'NaN') {
+        return '<span class="math-symbol math-nan-symbol">' + name + '</span>';
+      } else if (name === 'null') {
+        return '<span class="math-symbol math-null-symbol">' + name + '</span>';
+      } else if (name === 'undefined') {
+        return '<span class="math-symbol math-undefined-symbol">' + name + '</span>';
+      }
+      return '<span class="math-symbol">' + name + '</span>';
+    }
+
+    /**
+     * Get a JSON representation of the node
+     * @returns {Object}
+     */
+    toJSON() {
+      return {
+        mathjs: 'SymbolNode',
+        name: this.name
+      };
+    }
+
+    /**
+     * Instantiate a SymbolNode from its JSON representation
+     * @param {Object} json  An object structured like
+     *                       `{"mathjs": "SymbolNode", name: "x"}`,
+     *                       where mathjs is optional
+     * @returns {SymbolNode}
+     */
+    static fromJSON(json) {
+      return new SymbolNode(json.name);
+    }
+
+    /**
+     * Get LaTeX representation
+     * @param {Object} options
+     * @return {string} str
+     * @override
+     */
+    _toTex(options) {
+      let isUnit = false;
+      if (typeof math[this.name] === 'undefined' && isValuelessUnit(this.name)) {
+        isUnit = true;
+      }
+      const symbol = (0, _latex.toSymbol)(this.name, isUnit);
+      if (symbol[0] === '\\') {
+        // no space needed if the symbol starts with '\'
+        return symbol;
+      }
+      // the space prevents symbols from breaking stuff like '\cdot'
+      // if it's written right before the symbol
+      return ' ' + symbol;
+    }
+  }
+  return SymbolNode;
+}, {
+  isClass: true,
+  isNode: true
+});

node_modules/mathjs/lib/cjs/expression/node/utils/access.js

@@ -0,0 +1,46 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.accessFactory = accessFactory;
+var _errorTransform = require("../../transform/utils/errorTransform.js");
+var _customs = require("../../../utils/customs.js");
+function accessFactory(_ref) {
+  let {
+    subset
+  } = _ref;
+  /**
+   * Retrieve part of an object:
+   *
+   * - Retrieve a property from an object
+   * - Retrieve a part of a string
+   * - Retrieve a matrix subset
+   *
+   * @param {Object | Array | Matrix | string} object
+   * @param {Index} index
+   * @return {Object | Array | Matrix | string} Returns the subset
+   */
+  return function access(object, index) {
+    try {
+      if (Array.isArray(object)) {
+        return subset(object, index);
+      } else if (object && typeof object.subset === 'function') {
+        // Matrix
+        return object.subset(index);
+      } else if (typeof object === 'string') {
+        // TODO: move getStringSubset into a separate util file, use that
+        return subset(object, index);
+      } else if (typeof object === 'object') {
+        if (!index.isObjectProperty()) {
+          throw new TypeError('Cannot apply a numeric index as object property');
+        }
+        return (0, _customs.getSafeProperty)(object, index.getObjectProperty());
+      } else {
+        throw new TypeError('Cannot apply index: unsupported type of object');
+      }
+    } catch (err) {
+      throw (0, _errorTransform.errorTransform)(err);
+    }
+  };
+}

node_modules/mathjs/lib/cjs/expression/node/utils/assign.js

@@ -0,0 +1,57 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.assignFactory = assignFactory;
+var _errorTransform = require("../../transform/utils/errorTransform.js");
+var _customs = require("../../../utils/customs.js");
+function assignFactory(_ref) {
+  let {
+    subset,
+    matrix
+  } = _ref;
+  /**
+   * Replace part of an object:
+   *
+   * - Assign a property to an object
+   * - Replace a part of a string
+   * - Replace a matrix subset
+   *
+   * @param {Object | Array | Matrix | string} object
+   * @param {Index} index
+   * @param {*} value
+   * @return {Object | Array | Matrix | string} Returns the original object
+   *                                            except in case of a string
+   */
+  // TODO: change assign to return the value instead of the object
+  return function assign(object, index, value) {
+    try {
+      if (Array.isArray(object)) {
+        const result = matrix(object).subset(index, value).valueOf();
+
+        // shallow copy all (updated) items into the original array
+        result.forEach((item, index) => {
+          object[index] = item;
+        });
+        return object;
+      } else if (object && typeof object.subset === 'function') {
+        // Matrix
+        return object.subset(index, value);
+      } else if (typeof object === 'string') {
+        // TODO: move setStringSubset into a separate util file, use that
+        return subset(object, index, value);
+      } else if (typeof object === 'object') {
+        if (!index.isObjectProperty()) {
+          throw TypeError('Cannot apply a numeric index as object property');
+        }
+        (0, _customs.setSafeProperty)(object, index.getObjectProperty(), value);
+        return object;
+      } else {
+        throw new TypeError('Cannot apply index: unsupported type of object');
+      }
+    } catch (err) {
+      throw (0, _errorTransform.errorTransform)(err);
+    }
+  };
+}