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Edit File: front.calculator.js

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorParser = _interopRequireDefault(require("./parser/front.calculator.parser.tokenizer"));
var _frontCalculatorSymbol = _interopRequireDefault(require("./symbol/front.calculator.symbol.loader"));
var _frontCalculator = _interopRequireDefault(require("./parser/front.calculator.parser"));
var _frontCalculatorSymbol2 = _interopRequireDefault(require("./symbol/front.calculator.symbol.number"));
var _frontCalculatorSymbolConstant = _interopRequireDefault(require("./symbol/abstract/front.calculator.symbol.constant.abstract"));
var _frontCalculatorParserNode = _interopRequireDefault(require("./parser/node/front.calculator.parser.node.symbol"));
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("./symbol/abstract/front.calculator.symbol.operator.abstract"));
var _frontCalculatorSymbol3 = _interopRequireDefault(require("./symbol/front.calculator.symbol.separator"));
var _frontCalculatorParserNode2 = _interopRequireDefault(require("./parser/node/front.calculator.parser.node.function"));
var _frontCalculatorParserNode3 = _interopRequireDefault(require("./parser/node/front.calculator.parser.node.container"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); } /**********
                                                                                                                                                                                                                                                                                                                                                                                               * Attempt to rewrite Forminator_Calculator backend
                                                                                                                                                                                                                                                                                                                                                                                               *
                                                                                                                                                                                                                                                                                                                                                                                               * @see Forminator_Calculator
                                                                                                                                                                                                                                                                                                                                                                                               *
                                                                                                                                                                                                                                                                                                                                                                                               ***********/
var FrontCalculator = exports.default = /*#__PURE__*/function () {
  /**
   *
   * @param {string} term
   */
  function FrontCalculator(term) {
    _classCallCheck(this, FrontCalculator);
    /**
     *
     * @type {string}
     */
    this.term = term;

/**
     *
     * @type {FrontCalculatorParserTokenizer}
     */
    this.tokenizer = new _frontCalculatorParser.default(this.term);

/**
     *
     * @type {FrontCalculatorSymbolLoader}
     */
    this.symbolLoader = new _frontCalculatorSymbol.default();

/**
     *
     * @type {FrontCalculatorParser}
     */
    this.parser = new _frontCalculator.default(this.symbolLoader);
  }

/**
   *
   * @returns {FrontCalculatorParserNodeContainer}
   */
  _createClass(FrontCalculator, [{
    key: "parse",
    value: function parse() {
      // reset
      this.tokenizer.input = this.term;
      this.tokenizer.reset();
      var tokens = this.tokenizer.tokenize();
      if (tokens.length === 0) {
        throw 'Error: Empty token of calculator term.';
      }
      var rootNode = this.parser.parse(tokens);
      if (rootNode.isEmpty()) {
        throw 'Error: Empty nodes of calculator tokens.';
      }
      return rootNode;
    }

/**
     *
     * @returns {number}
     */
  }, {
    key: "calculate",
    value: function calculate() {
      var result = 0;
      var rootNode = this.parse();
      if (false === rootNode) {
        return result;
      }
      return this.calculateNode(rootNode);
    }

/**
     *Calculates the numeric value / result of a node of
     * any known and calculable type. (For example symbol
     * nodes with a symbol of type separator are not
     * calculable.)
     *
     * @param {FrontCalculatorParserNodeAbstract} node
     *
     * @returns {number}
     */
  }, {
    key: "calculateNode",
    value: function calculateNode(node) {
      if (node instanceof _frontCalculatorParserNode.default) {
        return this.calculateSymbolNode(node);
      } else if (node instanceof _frontCalculatorParserNode2.default) {
        return this.calculateFunctionNode(node);
      } else if (node instanceof _frontCalculatorParserNode3.default) {
        return this.calculateContainerNode(node);
      } else {
        throw 'Error: Cannot calculate node of unknown type "' + node.constructor.name + '"';
      }
    }

/**
     * This method actually calculates the results of every sub-terms
     * in the syntax tree (which consists of nodes).
     * It can call itself recursively.
     * Attention: $node must not be of type FunctionNode!
     *
     * @param {FrontCalculatorParserNodeContainer} containerNode
     *
     * @returns {number}
     */
  }, {
    key: "calculateContainerNode",
    value: function calculateContainerNode(containerNode) {
      if (containerNode instanceof _frontCalculatorParserNode2.default) {
        throw 'Error: Expected container node but got a function node';
      }
      var result = 0;
      var nodes = containerNode.childNodes;
      var orderedOperatorNodes = this.detectCalculationOrder(nodes);

// Actually calculate the term. Iterates over the ordered operators and
      // calculates them, then replaces the parts of the operation by the result.
      for (var i = 0; i < orderedOperatorNodes.length; i++) {
        var operatorNode = orderedOperatorNodes[i].node;
        var index = orderedOperatorNodes[i].index;
        var leftOperand = null;
        var leftOperandIndex = null;
        var nodeIndex = 0;
        while (nodeIndex !== index) {
          if (nodes[nodeIndex] === undefined) {
            nodeIndex++;
            continue;
          }
          leftOperand = nodes[nodeIndex];
          leftOperandIndex = nodeIndex;
          nodeIndex++;
        }
        nodeIndex++;
        while (nodes[nodeIndex] === undefined) {
          nodeIndex++;
        }
        var rightOperand = nodes[nodeIndex];
        var rightOperandIndex = nodeIndex;
        var rightNumber = !isNaN(rightOperand) ? rightOperand : this.calculateNode(rightOperand);

/**
         * @type {FrontCalculatorSymbolOperatorAbstract}
         */
        var symbol = operatorNode.symbol;
        if (operatorNode.isUnaryOperator) {
          result = symbol.operate(null, rightNumber);

// Replace the participating symbols of the operation by the result
          delete nodes[rightOperandIndex]; // `delete` operation only set the value to empty, not `actually` remove it
          nodes[index] = result;
        } else {
          if (leftOperandIndex !== null && leftOperand !== null) {
            var leftNumber = !isNaN(leftOperand) ? leftOperand : this.calculateNode(leftOperand);
            result = symbol.operate(leftNumber, rightNumber);

// Replace the participating symbols of the operation by the result
            delete nodes[leftOperandIndex];
            delete nodes[rightOperandIndex];
            nodes[index] = result;
          }
        }
      }

//cleanup empty nodes
      nodes = nodes.filter(function (node) {
        return node !== undefined;
      });
      if (nodes.length === 0) {
        throw 'Error: Missing calculable subterm. Are there empty brackets?';
      }
      if (nodes.length > 1) {
        throw 'Error: Missing operators between parts of the term.';
      }

// The only remaining element of the $nodes array contains the overall result
      result = nodes.pop();

// If the $nodes array did not contain any operator (but only one node) than
      // the result of this node has to be calculated now
      if (isNaN(result)) {
        return this.calculateNode(result);
      }
      return result;
    }

/**
     * Returns the numeric value of a function node.
     * @param {FrontCalculatorParserNodeFunction} functionNode
     *
     * @returns {number}
     */
  }, {
    key: "calculateFunctionNode",
    value: function calculateFunctionNode(functionNode) {
      var nodes = functionNode.childNodes;
      var functionArguments = []; // ex : func(1+2,3,4) : 1+2 need to be calculated first
      var argumentChildNodes = [];
      var containerNode = null;
      for (var i = 0; i < nodes.length; i++) {
        var node = nodes[i];
        if (node instanceof _frontCalculatorParserNode.default) {
          if (node.symbol instanceof _frontCalculatorSymbol3.default) {
            containerNode = new _frontCalculatorParserNode3.default(argumentChildNodes);
            functionArguments.push(this.calculateNode(containerNode));
            argumentChildNodes = [];
          } else {
            argumentChildNodes.push(node);
          }
        } else {
          argumentChildNodes.push(node);
        }
      }
      if (argumentChildNodes.length > 0) {
        containerNode = new _frontCalculatorParserNode3.default(argumentChildNodes);
        functionArguments.push(this.calculateNode(containerNode));
      }

/**
       *
       * @type {FrontCalculatorSymbolFunctionAbstract}
       */
      var symbol = functionNode.symbolNode.symbol;
      return symbol.execute(functionArguments);
    }

/**
     * Returns the numeric value of a symbol node.
     * Attention: node.symbol must not be of type AbstractOperator!
     *
     * @param {FrontCalculatorParserNodeSymbol} symbolNode
     *
     * @returns {Number}
     */
  }, {
    key: "calculateSymbolNode",
    value: function calculateSymbolNode(symbolNode) {
      var symbol = symbolNode.symbol;
      var number = 0;
      if (symbol instanceof _frontCalculatorSymbol2.default) {
        number = symbolNode.token.value;

// Convert string to int or float (depending on the type of the number)
        // If the number has a longer fractional part, it will be cut.
        number = Number(number);
      } else if (symbol instanceof _frontCalculatorSymbolConstant.default) {
        number = symbol.value;
      } else {
        throw 'Error: Found symbol of unexpected type "' + symbol.constructor.name + '", expected number or constant';
      }
      return number;
    }

/**
     * Detect the calculation order of a given array of nodes.
     * Does only care for the precedence of operators.
     * Does not care for child nodes of container nodes.
     * Returns a new array with ordered symbol nodes
     *
     * @param {FrontCalculatorParserNodeAbstract[]} nodes
     *
     * @return {Array}
     */
  }, {
    key: "detectCalculationOrder",
    value: function detectCalculationOrder(nodes) {
      var operatorNodes = [];

// Store all symbol nodes that have a symbol of type abstract operator in an array
      for (var i = 0; i < nodes.length; i++) {
        var node = nodes[i];
        if (node instanceof _frontCalculatorParserNode.default) {
          if (node.symbol instanceof _frontCalculatorSymbolOperator.default) {
            var operatorNode = {
              index: i,
              node: node
            };
            operatorNodes.push(operatorNode);
          }
        }
      }
      operatorNodes.sort(
      /**
       * Returning 1 means $nodeTwo before $nodeOne, returning -1 means $nodeOne before $nodeTwo.
       * @param {Object} operatorNodeOne
       * @param {Object} operatorNodeTwo
       */
      function (operatorNodeOne, operatorNodeTwo) {
        var nodeOne = operatorNodeOne.node;
        var nodeTwo = operatorNodeTwo.node;

// First-level precedence of node one
        /**
         *
         * @type {FrontCalculatorSymbolOperatorAbstract}
         */
        var symbolOne = nodeOne.symbol;
        var precedenceOne = 2;
        if (nodeOne.isUnaryOperator) {
          precedenceOne = 3;
        }

// First-level precedence of node two
        /**
         *
         * @type {FrontCalculatorSymbolOperatorAbstract}
         */
        var symbolTwo = nodeTwo.symbol;
        var precedenceTwo = 2;
        if (nodeTwo.isUnaryOperator) {
          precedenceTwo = 3;
        }

// If the first-level precedence is the same, compare the second-level precedence
        if (precedenceOne === precedenceTwo) {
          precedenceOne = symbolOne.precedence;
          precedenceTwo = symbolTwo.precedence;
        }

// If the second-level precedence is the same, we have to ensure that the sorting algorithm does
        // insert the node / token that is left in the term before the node / token that is right.
        // Therefore we cannot return 0 but compare the positions and return 1 / -1.
        if (precedenceOne === precedenceTwo) {
          return nodeOne.token.position < nodeTwo.token.position ? -1 : 1;
        }
        return precedenceOne < precedenceTwo ? 1 : -1;
      });
      return operatorNodes;
    }
  }]);
  return FrontCalculator;
}();
if (window['forminatorCalculator'] === undefined) {
  window.forminatorCalculator = function (term) {
    return new FrontCalculator(term);
  };
}

},{"./parser/front.calculator.parser":2,"./parser/front.calculator.parser.tokenizer":4,"./parser/node/front.calculator.parser.node.container":6,"./parser/node/front.calculator.parser.node.function":7,"./parser/node/front.calculator.parser.node.symbol":8,"./symbol/abstract/front.calculator.symbol.constant.abstract":10,"./symbol/abstract/front.calculator.symbol.operator.abstract":12,"./symbol/front.calculator.symbol.loader":16,"./symbol/front.calculator.symbol.number":17,"./symbol/front.calculator.symbol.separator":18}],2:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorParser = _interopRequireDefault(require("./front.calculator.parser.token"));
var _frontCalculatorSymbol = _interopRequireDefault(require("../symbol/front.calculator.symbol.number"));
var _frontCalculatorSymbolOpening = _interopRequireDefault(require("../symbol/brackets/front.calculator.symbol.opening.bracket"));
var _frontCalculatorSymbolClosing = _interopRequireDefault(require("../symbol/brackets/front.calculator.symbol.closing.bracket"));
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../symbol/abstract/front.calculator.symbol.function.abstract"));
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../symbol/abstract/front.calculator.symbol.operator.abstract"));
var _frontCalculatorSymbol2 = _interopRequireDefault(require("../symbol/front.calculator.symbol.separator"));
var _frontCalculatorParserNode = _interopRequireDefault(require("./node/front.calculator.parser.node.symbol"));
var _frontCalculatorParserNode2 = _interopRequireDefault(require("./node/front.calculator.parser.node.container"));
var _frontCalculatorParserNode3 = _interopRequireDefault(require("./node/front.calculator.parser.node.function"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
/**
 * The parsers has one important method: parse()
 * It takes an array of tokens as input and
 * returns an array of nodes as output.
 * These nodes are the syntax tree of the term.
 *
 */
var FrontCalculatorParser = exports.default = /*#__PURE__*/function () {
  /**
   *
   * @param {FrontCalculatorSymbolLoader} symbolLoader
   */
  function FrontCalculatorParser(symbolLoader) {
    _classCallCheck(this, FrontCalculatorParser);
    /**
     *
     * @type {FrontCalculatorSymbolLoader}
     */
    this.symbolLoader = symbolLoader;
  }

/**
   * Parses an array with tokens. Returns an array of nodes.
   * These nodes define a syntax tree.
   *
   * @param {FrontCalculatorParserToken[]} tokens
   *
   * @returns FrontCalculatorParserNodeContainer
   */
  _createClass(FrontCalculatorParser, [{
    key: "parse",
    value: function parse(tokens) {
      var symbolNodes = this.detectSymbols(tokens);
      var nodes = this.createTreeByBrackets(symbolNodes);
      nodes = this.transformTreeByFunctions(nodes);
      this.checkGrammar(nodes);

// Wrap the nodes in an array node.
      return new _frontCalculatorParserNode2.default(nodes);
    }

/**
     * Creates a flat array of symbol nodes from tokens.
     *
     * @param {FrontCalculatorParserToken[]} tokens
     * @returns {FrontCalculatorParserNodeSymbol[]}
     */
  }, {
    key: "detectSymbols",
    value: function detectSymbols(tokens) {
      var symbolNodes = [];
      var symbol = null;
      var identifier = null;
      var expectingOpeningBracket = false; // True if we expect an opening bracket (after a function name)
      var openBracketCounter = 0;
      for (var i = 0; i < tokens.length; i++) {
        var token = tokens[i];
        var type = token.type;
        if (_frontCalculatorParser.default.TYPE_WORD === type) {
          identifier = token.value;
          symbol = this.symbolLoader.find(identifier);
          if (null === symbol) {
            throw 'Error: Detected unknown or invalid string identifier: ' + identifier + '.';
          }
        } else if (type === _frontCalculatorParser.default.TYPE_NUMBER) {
          // Notice: Numbers do not have an identifier
          var symbolNumbers = this.symbolLoader.findSubTypes(_frontCalculatorSymbol.default);
          if (symbolNumbers.length < 1 || !(symbolNumbers instanceof Array)) {
            throw 'Error: Unavailable number symbol processor.';
          }
          symbol = symbolNumbers[0];
        } else {
          // Type Token::TYPE_CHARACTER:
          identifier = token.value;
          symbol = this.symbolLoader.find(identifier);
          if (null === symbol) {
            throw 'Error: Detected unknown or invalid string identifier: ' + identifier + '.';
          }
          if (symbol instanceof _frontCalculatorSymbolOpening.default) {
            openBracketCounter++;
          }
          if (symbol instanceof _frontCalculatorSymbolClosing.default) {
            openBracketCounter--;

// Make sure there are not too many closing brackets
            if (openBracketCounter < 0) {
              throw 'Error: Found closing bracket that does not have an opening bracket.';
            }
          }
        }
        if (expectingOpeningBracket) {
          if (!(symbol instanceof _frontCalculatorSymbolOpening.default)) {
            throw 'Error: Expected opening bracket (after a function) but got something else.';
          }
          expectingOpeningBracket = false;
        } else {
          if (symbol instanceof _frontCalculatorSymbolFunction.default) {
            expectingOpeningBracket = true;
          }
        }
        var symbolNode = new _frontCalculatorParserNode.default(token, symbol);
        symbolNodes.push(symbolNode);
      }

// Make sure the term does not end with the name of a function but without an opening bracket
      if (expectingOpeningBracket) {
        throw 'Error: Expected opening bracket (after a function) but reached the end of the term';
      }

// Make sure there are not too many opening brackets
      if (openBracketCounter > 0) {
        throw 'Error: There is at least one opening bracket that does not have a closing bracket';
      }
      return symbolNodes;
    }

/**
     * Expects a flat array of symbol nodes and (if possible) transforms
     * it to a tree of nodes. Cares for brackets.
     * Attention: Expects valid brackets!
     * Check the brackets before you call this method.
     *
     * @param {FrontCalculatorParserNodeSymbol[]} symbolNodes
     * @returns {FrontCalculatorParserNodeAbstract[]}
     */
  }, {
    key: "createTreeByBrackets",
    value: function createTreeByBrackets(symbolNodes) {
      var tree = [];
      var nodesInBracket = []; // AbstractSymbol nodes inside level-0-brackets
      var openBracketCounter = 0;
      for (var i = 0; i < symbolNodes.length; i++) {
        var symbolNode = symbolNodes[i];
        if (!(symbolNode instanceof _frontCalculatorParserNode.default)) {
          throw 'Error: Expected symbol node, but got "' + symbolNode.constructor.name + '"';
        }
        if (symbolNode.symbol instanceof _frontCalculatorSymbolOpening.default) {
          openBracketCounter++;
          if (openBracketCounter > 1) {
            nodesInBracket.push(symbolNode);
          }
        } else if (symbolNode.symbol instanceof _frontCalculatorSymbolClosing.default) {
          openBracketCounter--;

// Found a closing bracket on level 0
          if (0 === openBracketCounter) {
            var subTree = this.createTreeByBrackets(nodesInBracket);

// Subtree can be empty for example if the term looks like this: "()" or "functioname()"
            // But this is okay, we need to allow this so we can call functions without a parameter
            tree.push(new _frontCalculatorParserNode2.default(subTree));
            nodesInBracket = [];
          } else {
            nodesInBracket.push(symbolNode);
          }
        } else {
          if (0 === openBracketCounter) {
            tree.push(symbolNode);
          } else {
            nodesInBracket.push(symbolNode);
          }
        }
      }
      return tree;
    }

/**
     * Replaces [a SymbolNode that has a symbol of type AbstractFunction,
     * followed by a node of type ContainerNode] by a FunctionNode.
     * Expects the $nodes not including any function nodes (yet).
     *
     * @param {FrontCalculatorParserNodeAbstract[]} nodes
     *
     * @returns {FrontCalculatorParserNodeAbstract[]}
     */
  }, {
    key: "transformTreeByFunctions",
    value: function transformTreeByFunctions(nodes) {
      var transformedNodes = [];
      var functionSymbolNode = null;
      for (var i = 0; i < nodes.length; i++) {
        var node = nodes[i];
        if (node instanceof _frontCalculatorParserNode2.default) {
          var transformedChildNodes = this.transformTreeByFunctions(node.childNodes);
          if (null !== functionSymbolNode) {
            var functionNode = new _frontCalculatorParserNode3.default(transformedChildNodes, functionSymbolNode);
            transformedNodes.push(functionNode);
            functionSymbolNode = null;
          } else {
            // not a function
            node.childNodes = transformedChildNodes;
            transformedNodes.push(node);
          }
        } else if (node instanceof _frontCalculatorParserNode.default) {
          var symbol = node.symbol;
          if (symbol instanceof _frontCalculatorSymbolFunction.default) {
            functionSymbolNode = node;
          } else {
            transformedNodes.push(node);
          }
        } else {
          throw 'Error: Expected array node or symbol node, got "' + node.constructor.name + '"';
        }
      }
      return transformedNodes;
    }

/**
     * Ensures the tree follows the grammar rules for terms
     *
     * @param {FrontCalculatorParserNodeAbstract[]} nodes
     */
  }, {
    key: "checkGrammar",
    value: function checkGrammar(nodes) {
      // TODO Make sure that separators are only in the child nodes of the array node of a function node
      // (If this happens the calculator will throw an exception)

for (var i = 0; i < nodes.length; i++) {
        var node = nodes[i];
        if (node instanceof _frontCalculatorParserNode.default) {
          var symbol = node.symbol;
          if (symbol instanceof _frontCalculatorSymbolOperator.default) {
            var posOfRightOperand = i + 1;

// Make sure the operator is positioned left of a (potential) operand (=prefix notation).
            // Example term: "-1"
            if (posOfRightOperand >= nodes.length) {
              throw 'Error: Found operator that does not stand before an operand.';
            }
            var posOfLeftOperand = i - 1;
            var leftOperand = null;

// Operator is unary if positioned at the beginning of a term
            if (posOfLeftOperand >= 0) {
              leftOperand = nodes[posOfLeftOperand];
              if (leftOperand instanceof _frontCalculatorParserNode.default) {
                if (leftOperand.symbol instanceof _frontCalculatorSymbolOperator.default // example 1`+-`5 : + = operator, - = unary
                || leftOperand.symbol instanceof _frontCalculatorSymbol2.default // example func(1`,-`5) ,= separator, - = unary
                ) {
                  // Operator is unary if positioned right to another operator
                  leftOperand = null;
                }
              }
            }

// If null, the operator is unary
            if (null === leftOperand) {
              if (!symbol.operatesUnary) {
                throw 'Error: Found operator in unary notation that is not unary.';
              }

// Remember that this node represents a unary operator
              node.setIsUnaryOperator(true);
            } else {
              if (!symbol.operatesBinary) {
                console.log(symbol);
                throw 'Error: Found operator in binary notation that is not binary.';
              }
            }
          }
        } else {
          this.checkGrammar(node.childNodes);
        }
      }
    }
  }]);
  return FrontCalculatorParser;
}();

},{"../symbol/abstract/front.calculator.symbol.function.abstract":11,"../symbol/abstract/front.calculator.symbol.operator.abstract":12,"../symbol/brackets/front.calculator.symbol.closing.bracket":13,"../symbol/brackets/front.calculator.symbol.opening.bracket":14,"../symbol/front.calculator.symbol.number":17,"../symbol/front.calculator.symbol.separator":18,"./front.calculator.parser.token":3,"./node/front.calculator.parser.node.container":6,"./node/front.calculator.parser.node.function":7,"./node/front.calculator.parser.node.symbol":8}],3:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var FrontCalculatorParserToken = exports.default = /*#__PURE__*/function () {
  function FrontCalculatorParserToken(type, value, position) {
    _classCallCheck(this, FrontCalculatorParserToken);
    /**
     *
     * @type {Number}
     */
    this.type = type;

/**
     *
     * @type {String|Number}
     */
    this.value = value;

/**
     *
     * @type {Number}
     */
    this.position = position;
  }
  _createClass(FrontCalculatorParserToken, null, [{
    key: "TYPE_WORD",
    get: function get() {
      return 1;
    }
  }, {
    key: "TYPE_CHAR",
    get: function get() {
      return 2;
    }
  }, {
    key: "TYPE_NUMBER",
    get: function get() {
      return 3;
    }
  }]);
  return FrontCalculatorParserToken;
}();

},{}],4:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorParser = _interopRequireDefault(require("./front.calculator.parser.token"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var FrontCalculatorParserTokenizer = exports.default = /*#__PURE__*/function () {
  function FrontCalculatorParserTokenizer(input) {
    _classCallCheck(this, FrontCalculatorParserTokenizer);
    /**
     *
     * @type {String}
     */
    this.input = input;

/**
     * @type {number}
     */
    this.currentPosition = 0;
  }

/**
   *
   * @returns {FrontCalculatorParserToken[]}
   */
  _createClass(FrontCalculatorParserTokenizer, [{
    key: "tokenize",
    value: function tokenize() {
      this.reset();
      var tokens = [];
      var token = this.readToken();
      while (token) {
        tokens.push(token);
        token = this.readToken();
      }
      return tokens;
    }

/**
     *
     * @returns {FrontCalculatorParserToken}
     */
  }, {
    key: "readToken",
    value: function readToken() {
      this.stepOverWhitespace();
      var char = this.readCurrent();
      if (null === char) {
        return null;
      }
      var value = null;
      var type = null;
      if (this.isLetter(char)) {
        value = this.readWord();
        type = _frontCalculatorParser.default.TYPE_WORD;
      } else if (this.isDigit(char) || this.isPeriod(char)) {
        value = this.readNumber();
        type = _frontCalculatorParser.default.TYPE_NUMBER;
      } else {
        value = this.readChar();
        type = _frontCalculatorParser.default.TYPE_CHAR;
      }
      return new _frontCalculatorParser.default(type, value, this.currentPosition);
    }

/**
     * Returns true, if a given character is a letter (a-z and A-Z).
     *
     * @param char
     * @returns {boolean}
     */
  }, {
    key: "isLetter",
    value: function isLetter(char) {
      if (null === char) {
        return false;
      }
      var ascii = char.charCodeAt(0);

/**
       * ASCII codes: 65 = 'A', 90 = 'Z', 97 = 'a', 122 = 'z'--
       **/
      return ascii >= 65 && ascii <= 90 || ascii >= 97 && ascii <= 122;
    }

/**
     * Returns true, if a given character is a digit (0-9).
     *
     * @param char
     * @returns {boolean}
     */
  }, {
    key: "isDigit",
    value: function isDigit(char) {
      if (null === char) {
        return false;
      }
      var ascii = char.charCodeAt(0);

/**
       * ASCII codes: 48 = '0', 57 = '9'
       */
      return ascii >= 48 && ascii <= 57;
    }

/**
     * Returns true, if a given character is a period ('.').
     *
     * @param char
     * @returns {boolean}
     */
  }, {
    key: "isPeriod",
    value: function isPeriod(char) {
      return '.' === char;
    }

/**
     * Returns true, if a given character is whitespace.
     * Notice: A null char is not seen as whitespace.
     *
     * @param char
     * @returns {boolean}
     */
  }, {
    key: "isWhitespace",
    value: function isWhitespace(char) {
      return [" ", "\t", "\n"].indexOf(char) >= 0;
    }
  }, {
    key: "stepOverWhitespace",
    value: function stepOverWhitespace() {
      while (this.isWhitespace(this.readCurrent())) {
        this.readNext();
      }
    }

/**
     * Reads a word. Assumes that the cursor of the input stream
     * currently is positioned at the beginning of a word.
     *
     * @returns {string}
     */
  }, {
    key: "readWord",
    value: function readWord() {
      var word = '';
      var char = this.readCurrent();
      // Try to read the word
      while (null !== char) {
        if (this.isLetter(char)) {
          word += char;
        } else {
          break;
        }

// Just move the cursor to the next position
        char = this.readNext();
      }
      return word;
    }

/**
     * Reads a number (as a string). Assumes that the cursor
     * of the input stream currently is positioned at the
     * beginning of a number.
     *
     * @returns {string}
     */
  }, {
    key: "readNumber",
    value: function readNumber() {
      var number = '';
      var foundPeriod = false;

// Try to read the number.
      // Notice: It does not matter if the number only consists of a single period
      // or if it ends with a period.
      var char = this.readCurrent();
      while (null !== char) {
        if (this.isPeriod(char) || this.isDigit(char)) {
          if (this.isPeriod(char)) {
            if (foundPeriod) {
              throw 'Error: A number cannot have more than one period';
            }
            foundPeriod = true;
          }
          number += char;
        } else {
          break;
        }

// read next
        char = this.readNext();
      }
      return number;
    }

/**
     * Reads a single char. Assumes that the cursor of the input stream
     * currently is positioned at a char (not on null).
     *
     * @returns {String}
     */
  }, {
    key: "readChar",
    value: function readChar() {
      var char = this.readCurrent();
      // Just move the cursor to the next position
      this.readNext();
      return char;
    }

/**
     *
     * @returns {String|null}
     */
  }, {
    key: "readCurrent",
    value: function readCurrent() {
      var char = null;
      if (this.hasCurrent()) {
        char = this.input[this.currentPosition];
      }
      return char;
    }

/**
     * Move the the cursor to the next position.
     * Will always move the cursor, even if the end of the string has been passed.
     *
     * @returns {String}
     */
  }, {
    key: "readNext",
    value: function readNext() {
      this.currentPosition++;
      return this.readCurrent();
    }

/**
     * Returns true if there is a character at the current position
     *
     * @returns {boolean}
     */
  }, {
    key: "hasCurrent",
    value: function hasCurrent() {
      return this.currentPosition < this.input.length;
    }
  }, {
    key: "reset",
    value: function reset() {
      this.currentPosition = 0;
    }
  }]);
  return FrontCalculatorParserTokenizer;
}();

},{"./front.calculator.parser.token":3}],5:[function(require,module,exports){
"use strict";

},{}],6:[function(require,module,exports){
"use strict";

/**
     *
     * @type {FrontCalculatorParserNodeAbstract[]}
     */
    _this.childNodes = null;
    _this.setChildNodes(childNodes);
    return _this;
  }

/**
   * Setter for the child nodes.
   * Notice: The number of child nodes can be 0.
   * @param childNodes
   */
  _createClass(FrontCalculatorParserNodeContainer, [{
    key: "setChildNodes",
    value: function setChildNodes(childNodes) {
      childNodes.forEach(function (childNode) {
        if (!(childNode instanceof _frontCalculatorParserNode.default)) {
          throw 'Expected AbstractNode, but got ' + childNode.constructor.name;
        }
      });
      this.childNodes = childNodes;
    }

/**
     * Returns the number of child nodes in this array node.
     * Does not count the child nodes of the child nodes.
     *
     * @returns {number}
     */
  }, {
    key: "size",
    value: function size() {
      try {
        return this.childNodes.length;
      } catch (e) {
        return 0;
      }
    }

/**
     * Returns true if the array node does not have any
     * child nodes. This might sound strange but is possible.
     *
     * @returns {boolean}
     */
  }, {
    key: "isEmpty",
    value: function isEmpty() {
      return !this.size();
    }
  }]);
  return FrontCalculatorParserNodeContainer;
}(_frontCalculatorParserNode.default);

},{"./front.calculator.parser.node.abstract":5}],7:[function(require,module,exports){
"use strict";

/**
     *
     * @type {FrontCalculatorParserNodeSymbol}
     */
    _this.symbolNode = symbolNode;
    return _this;
  }
  return _createClass(FrontCalculatorParserNodeFunction);
}(_frontCalculatorParserNode.default);

},{"./front.calculator.parser.node.container":6}],8:[function(require,module,exports){
"use strict";

/**
     * The token of the node. It contains the value.
     *
     * @type {FrontCalculatorParserToken}
     */
    _this.token = token;

/**
     * The symbol of the node. It defines the type of the node.
     *
     * @type {FrontCalculatorSymbolAbstract}
     */
    _this.symbol = symbol;

/**
     * Unary operators need to be treated specially.
     * Therefore a node has to know if it (or to be
     * more precise the symbol of the node)
     * represents a unary operator.
     * Example : -1, -4
     *
     * @type {boolean}
     */
    _this.isUnaryOperator = false;
    return _this;
  }
  _createClass(FrontCalculatorParserNodeSymbol, [{
    key: "setIsUnaryOperator",
    value: function setIsUnaryOperator(isUnaryOperator) {
      if (!(this.symbol instanceof _frontCalculatorSymbolOperator.default)) {
        throw 'Error: Cannot mark node as unary operator, because symbol is not an operator but of type ' + this.symbol.constructor.name;
      }
      this.isUnaryOperator = isUnaryOperator;
    }
  }]);
  return FrontCalculatorParserNodeSymbol;
}(_frontCalculatorParserNode.default);

},{"../../symbol/abstract/front.calculator.symbol.operator.abstract":12,"./front.calculator.parser.node.abstract":5}],9:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var FrontCalculatorSymbolAbstract = exports.default = /*#__PURE__*/function () {
  function FrontCalculatorSymbolAbstract() {
    _classCallCheck(this, FrontCalculatorSymbolAbstract);
    /**
     * Array with the 1-n (exception: the Numbers class may have 0)
     * unique identifiers (the textual representation of a symbol)
     * of the symbol. Example: ['/', ':']
     * Attention: The identifiers are case-sensitive, however,
     * valid identifiers in a term are always written in lower-case.
     * Therefore identifiers always have to be written in lower-case!
     *
     * @type {String[]}
     */
    this.identifiers = [];
  }

/**
   * Getter for the identifiers of the symbol.
   * Attention: The identifiers will be lower-cased!
   * @returns {String[]}
   */
  _createClass(FrontCalculatorSymbolAbstract, [{
    key: "getIdentifiers",
    value: function getIdentifiers() {
      var lowerIdentifiers = [];
      this.identifiers.forEach(function (identifier) {
        lowerIdentifiers.push(identifier.toLowerCase());
      });
      return lowerIdentifiers;
    }
  }]);
  return FrontCalculatorSymbolAbstract;
}();

},{}],10:[function(require,module,exports){
"use strict";

/**
     * This is the value of the constant. We use 0 as an example here,
     * but you are supposed to overwrite this in the concrete constant class.
     * Usually mathematical constants are not integers, however,
     * you are allowed to use an integer in this context.
     *
     * @type {number}
     */
    _this.value = 0;
    return _this;
  }
  return _createClass(FrontCalculatorSymbolConstantAbstract);
}(_frontCalculatorSymbol.default);

},{"./front.calculator.symbol.abstract":9}],11:[function(require,module,exports){
"use strict";

/**
   * This method is called when the function is executed. A function can have 0-n parameters.
   * The implementation of this method is responsible to validate the number of arguments.
   * The $arguments array contains these arguments. If the number of arguments is improper,
   * the method has to throw a Exceptions\NumberOfArgumentsException exception.
   * The items of the $arguments array will always be of type int or float. They will never be null.
   * They keys will be integers starting at 0 and representing the positions of the arguments
   * in ascending order.
   * Overwrite this method in the concrete operator class.
   * If this class does NOT return a value of type int or float,
   * an exception will be thrown.
   *
   * @param {int[]|float[]} params
   * @returns {number}
   */
  _createClass(FrontCalculatorSymbolFunctionAbstract, [{
    key: "execute",
    value: function execute(params) {
      return 0.0;
    }
  }]);
  return FrontCalculatorSymbolFunctionAbstract;
}(_frontCalculatorSymbol.default);

},{"./front.calculator.symbol.abstract":9}],12:[function(require,module,exports){
"use strict";

/**
     * The operator precedence determines which operators to perform first
     * in order to evaluate a given term.
     * You are supposed to overwrite this constant in the concrete constant class.
     * Take a look at other operator classes to see the precedences of the predefined operators.
     * 0: default, > 0: higher, < 0: lower
     *
     * @type {number}
     */
    _this.precedence = 0;

/**
     * Usually operators are binary, they operate on two operands (numbers).
     * But some can operate on one operand (number). The operand of a unary
     * operator is always positioned after the operator (=prefix notation).
     * Good example: "-1" Bad Example: "1-"
     * If you want to create a unary operator that operates on the left
     * operand, you should use a function instead. Functions with one
     * parameter execute unary operations in functional notation.
     * Notice: Operators can be unary AND binary (but this is a rare case)
     *
     * @type {boolean}
     */
    _this.operatesUnary = false;

/**
     * Usually operators are binary, they operate on two operands (numbers).
     * Notice: Operators can be unary AND binary (but this is a rare case)
     *
     * @type {boolean}
     */
    _this.operatesBinary = true;
    return _this;
  }
  _createClass(FrontCalculatorSymbolOperatorAbstract, [{
    key: "operate",
    value: function operate(leftNumber, rightNumber) {
      return 0.0;
    }
  }]);
  return FrontCalculatorSymbolOperatorAbstract;
}(_frontCalculatorSymbol.default);

},{"./front.calculator.symbol.abstract":9}],13:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.abstract":9}],14:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.abstract":9}],15:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.constant.abstract":10}],16:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("./front.calculator.symbol.number"));
var _frontCalculatorSymbol2 = _interopRequireDefault(require("./front.calculator.symbol.separator"));
var _frontCalculatorSymbolOpening = _interopRequireDefault(require("./brackets/front.calculator.symbol.opening.bracket"));
var _frontCalculatorSymbolClosing = _interopRequireDefault(require("./brackets/front.calculator.symbol.closing.bracket"));
var _frontCalculatorSymbolConstant = _interopRequireDefault(require("./constants/front.calculator.symbol.constant.pi"));
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("./operators/front.calculator.symbol.operator.addition"));
var _frontCalculatorSymbolOperator2 = _interopRequireDefault(require("./operators/front.calculator.symbol.operator.division"));
var _frontCalculatorSymbolOperator3 = _interopRequireDefault(require("./operators/front.calculator.symbol.operator.exponentiation"));
var _frontCalculatorSymbolOperator4 = _interopRequireDefault(require("./operators/front.calculator.symbol.operator.modulo"));
var _frontCalculatorSymbolOperator5 = _interopRequireDefault(require("./operators/front.calculator.symbol.operator.multiplication"));
var _frontCalculatorSymbolOperator6 = _interopRequireDefault(require("./operators/front.calculator.symbol.operator.subtraction"));
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("./functions/front.calculator.symbol.function.abs"));
var _frontCalculatorSymbolFunction2 = _interopRequireDefault(require("./functions/front.calculator.symbol.function.avg"));
var _frontCalculatorSymbolFunction3 = _interopRequireDefault(require("./functions/front.calculator.symbol.function.ceil"));
var _frontCalculatorSymbolFunction4 = _interopRequireDefault(require("./functions/front.calculator.symbol.function.floor"));
var _frontCalculatorSymbolFunction5 = _interopRequireDefault(require("./functions/front.calculator.symbol.function.max"));
var _frontCalculatorSymbolFunction6 = _interopRequireDefault(require("./functions/front.calculator.symbol.function.min"));
var _frontCalculatorSymbolFunction7 = _interopRequireDefault(require("./functions/front.calculator.symbol.function.round"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var FrontCalculatorSymbolLoader = exports.default = /*#__PURE__*/function () {
  function FrontCalculatorSymbolLoader() {
    _classCallCheck(this, FrontCalculatorSymbolLoader);
    /**
     *
     * @type {{FrontCalculatorSymbolOperatorModulo: FrontCalculatorSymbolOperatorModulo, FrontCalculatorSymbolOperatorSubtraction: FrontCalculatorSymbolOperatorSubtraction, FrontCalculatorSymbolOperatorExponentiation: FrontCalculatorSymbolOperatorExponentiation, FrontCalculatorSymbolOperatorAddition: FrontCalculatorSymbolOperatorAddition, FrontCalculatorSymbolClosingBracket: FrontCalculatorSymbolClosingBracket, FrontCalculatorSymbolFunctionMax: FrontCalculatorSymbolFunctionMax, FrontCalculatorSymbolFunctionCeil: FrontCalculatorSymbolFunctionCeil, FrontCalculatorSymbolSeparator: FrontCalculatorSymbolSeparator, FrontCalculatorSymbolOperatorMultiplication: FrontCalculatorSymbolOperatorMultiplication, FrontCalculatorSymbolFunctionAbs: FrontCalculatorSymbolFunctionAbs, FrontCalculatorSymbolFunctionAvg: FrontCalculatorSymbolFunctionAvg, FrontCalculatorSymbolFunctionFloor: FrontCalculatorSymbolFunctionFloor, FrontCalculatorSymbolFunctionMin: FrontCalculatorSymbolFunctionMin, FrontCalculatorSymbolOperatorDivision: FrontCalculatorSymbolOperatorDivision, FrontCalculatorSymbolNumber: FrontCalculatorSymbolNumber, FrontCalculatorSymbolOpeningBracket: FrontCalculatorSymbolOpeningBracket, FrontCalculatorSymbolConstantPi: FrontCalculatorSymbolConstantPi, FrontCalculatorSymbolFunctionRound: FrontCalculatorSymbolFunctionRound}}
     */
    this.symbols = {
      FrontCalculatorSymbolNumber: new _frontCalculatorSymbol.default(),
      FrontCalculatorSymbolSeparator: new _frontCalculatorSymbol2.default(),
      FrontCalculatorSymbolOpeningBracket: new _frontCalculatorSymbolOpening.default(),
      FrontCalculatorSymbolClosingBracket: new _frontCalculatorSymbolClosing.default(),
      FrontCalculatorSymbolConstantPi: new _frontCalculatorSymbolConstant.default(),
      FrontCalculatorSymbolOperatorAddition: new _frontCalculatorSymbolOperator.default(),
      FrontCalculatorSymbolOperatorDivision: new _frontCalculatorSymbolOperator2.default(),
      FrontCalculatorSymbolOperatorExponentiation: new _frontCalculatorSymbolOperator3.default(),
      FrontCalculatorSymbolOperatorModulo: new _frontCalculatorSymbolOperator4.default(),
      FrontCalculatorSymbolOperatorMultiplication: new _frontCalculatorSymbolOperator5.default(),
      FrontCalculatorSymbolOperatorSubtraction: new _frontCalculatorSymbolOperator6.default(),
      FrontCalculatorSymbolFunctionAbs: new _frontCalculatorSymbolFunction.default(),
      FrontCalculatorSymbolFunctionAvg: new _frontCalculatorSymbolFunction2.default(),
      FrontCalculatorSymbolFunctionCeil: new _frontCalculatorSymbolFunction3.default(),
      FrontCalculatorSymbolFunctionFloor: new _frontCalculatorSymbolFunction4.default(),
      FrontCalculatorSymbolFunctionMax: new _frontCalculatorSymbolFunction5.default(),
      FrontCalculatorSymbolFunctionMin: new _frontCalculatorSymbolFunction6.default(),
      FrontCalculatorSymbolFunctionRound: new _frontCalculatorSymbolFunction7.default()
    };
  }

/**
   * Returns the symbol that has the given identifier.
   * Returns null if none is found.
   *
   * @param identifier
   * @returns {FrontCalculatorSymbolAbstract|null}
   */
  _createClass(FrontCalculatorSymbolLoader, [{
    key: "find",
    value: function find(identifier) {
      identifier = identifier.toLowerCase();
      for (var key in this.symbols) {
        if (this.symbols.hasOwnProperty(key)) {
          var symbol = this.symbols[key];
          if (symbol.getIdentifiers().indexOf(identifier) >= 0) {
            return symbol;
          }
        }
      }
      return null;
    }

/**
     * Returns all symbols that inherit from a given abstract
     * parent type (class): The parent type has to be an
     * AbstractSymbol.
     * Notice: The parent type name will not be validated!
     *
     * @param parentTypeName
     * @returns {FrontCalculatorSymbolAbstract[]}
     */
  }, {
    key: "findSubTypes",
    value: function findSubTypes(parentTypeName) {
      var symbols = [];
      for (var key in this.symbols) {
        if (this.symbols.hasOwnProperty(key)) {
          var symbol = this.symbols[key];
          if (symbol instanceof parentTypeName) {
            symbols.push(symbol);
          }
        }
      }
      return symbols;
    }
  }]);
  return FrontCalculatorSymbolLoader;
}();

},{"./brackets/front.calculator.symbol.closing.bracket":13,"./brackets/front.calculator.symbol.opening.bracket":14,"./constants/front.calculator.symbol.constant.pi":15,"./front.calculator.symbol.number":17,"./front.calculator.symbol.separator":18,"./functions/front.calculator.symbol.function.abs":19,"./functions/front.calculator.symbol.function.avg":20,"./functions/front.calculator.symbol.function.ceil":21,"./functions/front.calculator.symbol.function.floor":22,"./functions/front.calculator.symbol.function.max":23,"./functions/front.calculator.symbol.function.min":24,"./functions/front.calculator.symbol.function.round":25,"./operators/front.calculator.symbol.operator.addition":26,"./operators/front.calculator.symbol.operator.division":27,"./operators/front.calculator.symbol.operator.exponentiation":28,"./operators/front.calculator.symbol.operator.modulo":29,"./operators/front.calculator.symbol.operator.multiplication":30,"./operators/front.calculator.symbol.operator.subtraction":31}],17:[function(require,module,exports){
"use strict";

},{"./abstract/front.calculator.symbol.abstract":9}],18:[function(require,module,exports){
"use strict";

},{"./abstract/front.calculator.symbol.abstract":9}],19:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],20:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],21:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],22:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],23:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],24:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],25:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.function.abstract":11}],26:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.operator.abstract":12}],27:[function(require,module,exports){
"use strict";

// // force to 0
      // if (!isFinite(result)) {
      // 	return 0;
      // }
      return result;
    }
  }]);
  return FrontCalculatorSymbolOperatorDivision;
}(_frontCalculatorSymbolOperator.default);

},{"../abstract/front.calculator.symbol.operator.abstract":12}],28:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.operator.abstract":12}],29:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.operator.abstract":12}],30:[function(require,module,exports){
"use strict";

},{"../abstract/front.calculator.symbol.operator.abstract":12}],31:[function(require,module,exports){
"use strict";

/**
     * Notice: The subtraction operator is unary AND binary!
     *
     * @type {boolean}
     */
    _this.operatesUnary = true;
    return _this;
  }
  _createClass(FrontCalculatorSymbolOperatorSubtraction, [{
    key: "operate",
    value: function operate(leftNumber, rightNumber) {
      return leftNumber - rightNumber;
    }
  }]);
  return FrontCalculatorSymbolOperatorSubtraction;
}(_frontCalculatorSymbolOperator.default);

},{"../abstract/front.calculator.symbol.operator.abstract":12}]},{},[1]);