MAINHACK

Viewing / Editing 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(e) { return e && e.__esModule ? e : { default: e }; }
/**********
 * Attempt to rewrite Forminator_Calculator backend
 *
 * @see Forminator_Calculator
 *
 ***********/

class FrontCalculator {
  /**
   *
   * @param {string} term
   */
  constructor(term) {
    /**
     *
     * @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}
   */
  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}
   */
  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}
   */
  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}
   */
  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 (nodeIndex < nodes.length && nodes[nodeIndex] === undefined) {
        nodeIndex++;
      }
      if (nodeIndex >= nodes.length) {
        throw 'Error: Found operator that does not stand before an operand.';
      }
      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}
   */
  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}
   */
  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}
   */
  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;
  }
}
exports.default = 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(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * 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.
 *
 */
class FrontCalculatorParser {
  /**
   *
   * @param {FrontCalculatorSymbolLoader} symbolLoader
   */
  constructor(symbolLoader) {
    /**
     *
     * @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
   */
  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[]}
   */
  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[]}
   */
  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[]}
   */
  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
   */
  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);
      }
    }
  }
}
exports.default = 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;
class FrontCalculatorParserToken {
  static get TYPE_WORD() {
    return 1;
  }
  static get TYPE_CHAR() {
    return 2;
  }
  static get TYPE_NUMBER() {
    return 3;
  }
  constructor(type, value, position) {
    /**
     *
     * @type {Number}
     */
    this.type = type;

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

/**
     *
     * @type {Number}
     */
    this.position = position;
  }
}
exports.default = 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(e) { return e && e.__esModule ? e : { default: e }; }
class FrontCalculatorParserTokenizer {
  constructor(input) {
    /**
     *
     * @type {String}
     */
    this.input = input;

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

/**
   *
   * @returns {FrontCalculatorParserToken[]}
   */
  tokenize() {
    this.reset();
    var tokens = [];
    var token = this.readToken();
    while (token) {
      tokens.push(token);
      token = this.readToken();
    }
    return tokens;
  }

/**
   *
   * @returns {FrontCalculatorParserToken}
   */
  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}
   */
  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}
   */
  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}
   */
  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}
   */
  isWhitespace(char) {
    return [" ", "\t", "\n"].indexOf(char) >= 0;
  }
  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}
   */
  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}
   */
  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}
   */
  readChar() {
    var char = this.readCurrent();
    // Just move the cursor to the next position
    this.readNext();
    return char;
  }

/**
   *
   * @returns {String|null}
   */
  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}
   */
  readNext() {
    this.currentPosition++;
    return this.readCurrent();
  }

/**
   * Returns true if there is a character at the current position
   *
   * @returns {boolean}
   */
  hasCurrent() {
    return this.currentPosition < this.input.length;
  }
  reset() {
    this.currentPosition = 0;
  }
}
exports.default = FrontCalculatorParserTokenizer;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
class FrontCalculatorParserNodeAbstract {
  constructor() {}
}
exports.default = FrontCalculatorParserNodeAbstract;

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

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

/**
   * Setter for the child nodes.
   * Notice: The number of child nodes can be 0.
   * @param childNodes
   */
  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}
   */
  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}
   */
  isEmpty() {
    return !this.size();
  }
}
exports.default = FrontCalculatorParserNodeContainer;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorParserNode = _interopRequireDefault(require("./front.calculator.parser.node.container"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * A function in a term consists of the name of the function
 * (the symbol of the function) and the brackets that follow
 * the name and everything that is in this brackets (the
 * arguments). A function node combines these two things.
 * It stores its symbol in the $symbolNode property and its
 * arguments in the $childNodes property which is inherited
 * from the ContainerNode class.
 *
 */
class FrontCalculatorParserNodeFunction extends _frontCalculatorParserNode.default {
  /**
   * ContainerNode constructor.
   * Attention: The constructor is differs from the constructor
   * of the parent class!
   *
   * @param childNodes
   * @param symbolNode
   */
  constructor(childNodes, symbolNode) {
    super(childNodes);

/**
     *
     * @type {FrontCalculatorParserNodeSymbol}
     */
    this.symbolNode = symbolNode;
  }
}
exports.default = FrontCalculatorParserNodeFunction;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../../symbol/abstract/front.calculator.symbol.operator.abstract"));
var _frontCalculatorParserNode = _interopRequireDefault(require("./front.calculator.parser.node.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * A symbol node is a node in the syntax tree.
 * Leaf nodes do not have any child nodes
 * (parent nodes can have child nodes). A
 * symbol node represents a mathematical symbol.
 * Nodes are created by the parser.
 *
 */
class FrontCalculatorParserNodeSymbol extends _frontCalculatorParserNode.default {
  constructor(token, symbol) {
    super();

/**
     * 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;
  }
  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;
  }
}
exports.default = FrontCalculatorParserNodeSymbol;

},{"../../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;
class FrontCalculatorSymbolAbstract {
  constructor() {
    /**
     * 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[]}
   */
  getIdentifiers() {
    var lowerIdentifiers = [];
    this.identifiers.forEach(function (identifier) {
      lowerIdentifiers.push(identifier.toLowerCase());
    });
    return lowerIdentifiers;
  }
}
exports.default = FrontCalculatorSymbolAbstract;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("./front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * This class is the base class for all symbols that are of the type "constant".
 * We recommend to use names as textual representations for this type of symbol.
 * Please take note of the fact that the precision of PHP float constants
 * (for example M_PI) is based on the "precision" directive in php.ini,
 * which defaults to 14.
 */
class FrontCalculatorSymbolConstantAbstract extends _frontCalculatorSymbol.default {
  constructor() {
    super();

/**
     * 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;
  }
}
exports.default = FrontCalculatorSymbolConstantAbstract;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("./front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * This class is the base class for all symbols that are of the type "function".
 * Typically the textual representation of a function consists of two or more letters.
 */
class FrontCalculatorSymbolFunctionAbstract extends _frontCalculatorSymbol.default {
  constructor() {
    super();
  }

/**
   * 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}
   */
  execute(params) {
    return 0.0;
  }
}
exports.default = FrontCalculatorSymbolFunctionAbstract;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("./front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * This class is the base class for all symbols that are of the type "(binary) operator".
 * The textual representation of an operator consists of a single char that is not a letter.
 * It is worth noting that a operator has the same power as a function with two parameters.
 * Operators are always binary. To mimic a unary operator you might want to create a function
 * that accepts one parameter.
 */
class FrontCalculatorSymbolOperatorAbstract extends _frontCalculatorSymbol.default {
  constructor() {
    super();

/**
     * 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;
  }
  operate(leftNumber, rightNumber) {
    return 0.0;
  }
}
exports.default = FrontCalculatorSymbolOperatorAbstract;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("../abstract/front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
class FrontCalculatorSymbolClosingBracket extends _frontCalculatorSymbol.default {
  constructor() {
    super();
    this.identifiers = [')'];
  }
}
exports.default = FrontCalculatorSymbolClosingBracket;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("../abstract/front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
class FrontCalculatorSymbolOpeningBracket extends _frontCalculatorSymbol.default {
  constructor() {
    super();
    this.identifiers = ['('];
  }
}
exports.default = FrontCalculatorSymbolOpeningBracket;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolConstant = _interopRequireDefault(require("../abstract/front.calculator.symbol.constant.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.PI
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/PI
 */
class FrontCalculatorSymbolConstantPi extends _frontCalculatorSymbolConstant.default {
  constructor() {
    super();
    this.identifiers = ['pi'];
    this.value = Math.PI;
  }
}
exports.default = FrontCalculatorSymbolConstantPi;

},{"../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(e) { return e && e.__esModule ? e : { default: e }; }
class FrontCalculatorSymbolLoader {
  constructor() {
    /**
     *
     * @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}
   */
  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[]}
   */
  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;
  }
}
exports.default = 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";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("./abstract/front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * This class is the class that represents symbols of type "number".
 * Numbers are completely handled by the tokenizer/parser so there is no need to
 * create more than this concrete, empty number class that does not specify
 * a textual representation of numbers (numbers always consist of digits
 * and may include a single dot).
 */
class FrontCalculatorSymbolNumber extends _frontCalculatorSymbol.default {
  constructor() {
    super();
  }
}
exports.default = FrontCalculatorSymbolNumber;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbol = _interopRequireDefault(require("./abstract/front.calculator.symbol.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * This class is a class that represents symbols of type "separator".
 * A separator separates the arguments of a (mathematical) function.
 * Most likely we will only need one concrete "separator" class.
 */
class FrontCalculatorSymbolSeparator extends _frontCalculatorSymbol.default {
  constructor() {
    super();
    this.identifiers = [','];
  }
}
exports.default = FrontCalculatorSymbolSeparator;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.abs() function. Expects one parameter.
 * Example: "abs(2)" => 2, "abs(-2)" => 2, "abs(0)" => 0
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/abs
 */
class FrontCalculatorSymbolFunctionAbs extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['abs'];
  }
  execute(params) {
    if (params.length !== 1) {
      throw 'Error: Expected one argument, got ' + params.length;
    }
    var number = params[0];
    return Math.abs(number);
  }
}
exports.default = FrontCalculatorSymbolFunctionAbs;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.abs() function. Expects one parameter.
 * Example: "abs(2)" => 2, "abs(-2)" => 2, "abs(0)" => 0
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/abs
 */
class FrontCalculatorSymbolFunctionAvg extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['avg'];
  }
  execute(params) {
    if (params.length < 1) {
      throw 'Error: Expected at least one argument, got ' + params.length;
    }
    var sum = 0.0;
    for (var i = 0; i < params.length; i++) {
      sum += params[i];
    }
    return sum / params.length;
  }
}
exports.default = FrontCalculatorSymbolFunctionAvg;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.ceil() function aka round fractions up.
 * Expects one parameter.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/ceil
 */
class FrontCalculatorSymbolFunctionCeil extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['ceil'];
  }
  execute(params) {
    if (params.length !== 1) {
      throw 'Error: Expected one argument, got ' + params.length;
    }
    return Math.ceil(params[0]);
  }
}
exports.default = FrontCalculatorSymbolFunctionCeil;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.floor() function aka round fractions down.
 * Expects one parameter.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/floor
 */
class FrontCalculatorSymbolFunctionFloor extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['floor'];
  }
  execute(params) {
    if (params.length !== 1) {
      throw 'Error: Expected one argument, got ' + params.length;
    }
    return Math.floor(params[0]);
  }
}
exports.default = FrontCalculatorSymbolFunctionFloor;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.max() function. Expects at least one parameter.
 * Example: "max(1,2,3)" => 3, "max(1,-1)" => 1, "max(0,0)" => 0, "max(2)" => 2
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/max
 */
class FrontCalculatorSymbolFunctionMax extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['max'];
  }
  execute(params) {
    if (params.length < 1) {
      throw 'Error: Expected at least one argument, got ' + params.length;
    }
    return Math.max(...params);
  }
}
exports.default = FrontCalculatorSymbolFunctionMax;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.min() function. Expects at least one parameter.
 * Example: "min(1,2,3)" => 1, "min(1,-1)" => -1, "min(0,0)" => 0, "min(2)" => 2
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/min
 */
class FrontCalculatorSymbolFunctionMin extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['min'];
  }
  execute(params) {
    if (params.length < 1) {
      throw 'Error: Expected at least one argument, got ' + params.length;
    }
    return Math.min(...params);
  }
}
exports.default = FrontCalculatorSymbolFunctionMin;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolFunction = _interopRequireDefault(require("../abstract/front.calculator.symbol.function.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Math.round() function aka rounds a float.
 * Expects one parameter.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/round
 */
class FrontCalculatorSymbolFunctionRound extends _frontCalculatorSymbolFunction.default {
  constructor() {
    super();
    this.identifiers = ['round'];
  }
  execute(params) {
    if (params.length !== 1) {
      throw 'Error: Expected one argument, got ' + params.length;
    }
    return Math.round(params[0]);
  }
}
exports.default = FrontCalculatorSymbolFunctionRound;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../abstract/front.calculator.symbol.operator.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Operator for mathematical addition.
 * Example: "1+2" => 3
 *
 * @see     https://en.wikipedia.org/wiki/Addition
 *
 */
class FrontCalculatorSymbolOperatorAddition extends _frontCalculatorSymbolOperator.default {
  constructor() {
    super();
    this.identifiers = ['+'];
    this.precedence = 100;
  }
  operate(leftNumber, rightNumber) {
    return leftNumber + rightNumber;
  }
}
exports.default = FrontCalculatorSymbolOperatorAddition;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../abstract/front.calculator.symbol.operator.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Operator for mathematical division.
 * Example: "6/2" => 3, "6/0" => PHP warning
 *
 * @see     https://en.wikipedia.org/wiki/Division_(mathematics)
 *
 */
class FrontCalculatorSymbolOperatorDivision extends _frontCalculatorSymbolOperator.default {
  constructor() {
    super();
    this.identifiers = ['/'];
    this.precedence = 200;
  }
  operate(leftNumber, rightNumber) {
    var result = leftNumber / rightNumber;

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

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../abstract/front.calculator.symbol.operator.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Operator for mathematical exponentiation.
 * Example: "3^2" => 9, "-3^2" => -9, "3^-2" equals "3^(-2)"
 *
 * @see     https://en.wikipedia.org/wiki/Exponentiation
 * @see     https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/pow
 *
 */
class FrontCalculatorSymbolOperatorExponentiation extends _frontCalculatorSymbolOperator.default {
  constructor() {
    super();
    this.identifiers = ['^'];
    this.precedence = 300;
  }
  operate(leftNumber, rightNumber) {
    return Math.pow(leftNumber, rightNumber);
  }
}
exports.default = FrontCalculatorSymbolOperatorExponentiation;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../abstract/front.calculator.symbol.operator.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Operator for mathematical modulo operation.
 * Example: "5%3" => 2
 *
 * @see https://en.wikipedia.org/wiki/Modulo_operation
 *
 */
class FrontCalculatorSymbolOperatorModulo extends _frontCalculatorSymbolOperator.default {
  constructor() {
    super();
    this.identifiers = ['%'];
    this.precedence = 200;
  }
  operate(leftNumber, rightNumber) {
    return leftNumber % rightNumber;
  }
}
exports.default = FrontCalculatorSymbolOperatorModulo;

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _frontCalculatorSymbolOperator = _interopRequireDefault(require("../abstract/front.calculator.symbol.operator.abstract"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Operator for mathematical multiplication.
 * Example: "2*3" => 6
 *
 * @see     https://en.wikipedia.org/wiki/Multiplication
 *
 */
class FrontCalculatorSymbolOperatorMultiplication extends _frontCalculatorSymbolOperator.default {
  constructor() {
    super();
    this.identifiers = ['*'];
    this.precedence = 200;
  }
  operate(leftNumber, rightNumber) {
    return leftNumber * rightNumber;
  }
}
exports.default = FrontCalculatorSymbolOperatorMultiplication;

},{"../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;
  }
  operate(leftNumber, rightNumber) {
    return leftNumber - rightNumber;
  }
}
exports.default = FrontCalculatorSymbolOperatorSubtraction;

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

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