mathjs/lib/cjs/utils/is.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.isAccessorNode = isAccessorNode;
exports.isArray = void 0;
exports.isArrayNode = isArrayNode;
exports.isAssignmentNode = isAssignmentNode;
exports.isBigNumber = isBigNumber;
exports.isBlockNode = isBlockNode;
exports.isBoolean = isBoolean;
exports.isChain = isChain;
exports.isCollection = isCollection;
exports.isComplex = isComplex;
exports.isConditionalNode = isConditionalNode;
exports.isConstantNode = isConstantNode;
exports.isDate = isDate;
exports.isDenseMatrix = isDenseMatrix;
exports.isFraction = isFraction;
exports.isFunction = isFunction;
exports.isFunctionAssignmentNode = isFunctionAssignmentNode;
exports.isFunctionNode = isFunctionNode;
exports.isHelp = isHelp;
exports.isIndex = isIndex;
exports.isIndexNode = isIndexNode;
exports.isMatrix = isMatrix;
exports.isNode = isNode;
exports.isNull = isNull;
exports.isNumber = isNumber;
exports.isObject = isObject;
exports.isObjectNode = isObjectNode;
exports.isOperatorNode = isOperatorNode;
exports.isParenthesisNode = isParenthesisNode;
exports.isRange = isRange;
exports.isRangeNode = isRangeNode;
exports.isRegExp = isRegExp;
exports.isRelationalNode = isRelationalNode;
exports.isResultSet = isResultSet;
exports.isSparseMatrix = isSparseMatrix;
exports.isString = isString;
exports.isSymbolNode = isSymbolNode;
exports.isUndefined = isUndefined;
exports.isUnit = isUnit;
exports.rule2Node = rule2Node;
exports.typeOf = typeOf;
var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
// type checks for all known types
//
// note that:
//
// - check by duck-typing on a property like `isUnit`, instead of checking instanceof.
//   instanceof cannot be used because that would not allow to pass data from
//   one instance of math.js to another since each has it's own instance of Unit.
// - check the `isUnit` property via the constructor, so there will be no
//   matches for "fake" instances like plain objects with a property `isUnit`.
//   That is important for security reasons.
// - It must not be possible to override the type checks used internally,
//   for security reasons, so these functions are not exposed in the expression
//   parser.

function isNumber(x) {
  return typeof x === 'number';
}
function isBigNumber(x) {
  if (!x || (0, _typeof2["default"])(x) !== 'object' || typeof x.constructor !== 'function') {
    return false;
  }
  if (x.isBigNumber === true && (0, _typeof2["default"])(x.constructor.prototype) === 'object' && x.constructor.prototype.isBigNumber === true) {
    return true;
  }
  if (typeof x.constructor.isDecimal === 'function' && x.constructor.isDecimal(x) === true) {
    return true;
  }
  return false;
}
function isComplex(x) {
  return x && (0, _typeof2["default"])(x) === 'object' && Object.getPrototypeOf(x).isComplex === true || false;
}
function isFraction(x) {
  return x && (0, _typeof2["default"])(x) === 'object' && Object.getPrototypeOf(x).isFraction === true || false;
}
function isUnit(x) {
  return x && x.constructor.prototype.isUnit === true || false;
}
function isString(x) {
  return typeof x === 'string';
}
var isArray = exports.isArray = Array.isArray;
function isMatrix(x) {
  return x && x.constructor.prototype.isMatrix === true || false;
}

/**
 * Test whether a value is a collection: an Array or Matrix
 * @param {*} x
 * @returns {boolean} isCollection
 */
function isCollection(x) {
  return Array.isArray(x) || isMatrix(x);
}
function isDenseMatrix(x) {
  return x && x.isDenseMatrix && x.constructor.prototype.isMatrix === true || false;
}
function isSparseMatrix(x) {
  return x && x.isSparseMatrix && x.constructor.prototype.isMatrix === true || false;
}
function isRange(x) {
  return x && x.constructor.prototype.isRange === true || false;
}
function isIndex(x) {
  return x && x.constructor.prototype.isIndex === true || false;
}
function isBoolean(x) {
  return typeof x === 'boolean';
}
function isResultSet(x) {
  return x && x.constructor.prototype.isResultSet === true || false;
}
function isHelp(x) {
  return x && x.constructor.prototype.isHelp === true || false;
}
function isFunction(x) {
  return typeof x === 'function';
}
function isDate(x) {
  return x instanceof Date;
}
function isRegExp(x) {
  return x instanceof RegExp;
}
function isObject(x) {
  return !!(x && (0, _typeof2["default"])(x) === 'object' && x.constructor === Object && !isComplex(x) && !isFraction(x));
}
function isNull(x) {
  return x === null;
}
function isUndefined(x) {
  return x === undefined;
}
function isAccessorNode(x) {
  return x && x.isAccessorNode === true && x.constructor.prototype.isNode === true || false;
}
function isArrayNode(x) {
  return x && x.isArrayNode === true && x.constructor.prototype.isNode === true || false;
}
function isAssignmentNode(x) {
  return x && x.isAssignmentNode === true && x.constructor.prototype.isNode === true || false;
}
function isBlockNode(x) {
  return x && x.isBlockNode === true && x.constructor.prototype.isNode === true || false;
}
function isConditionalNode(x) {
  return x && x.isConditionalNode === true && x.constructor.prototype.isNode === true || false;
}
function isConstantNode(x) {
  return x && x.isConstantNode === true && x.constructor.prototype.isNode === true || false;
}

/* Very specialized: returns true for those nodes which in the numerator of
   a fraction means that the division in that fraction has precedence over implicit
   multiplication, e.g. -2/3 x parses as (-2/3) x and 3/4 x parses as (3/4) x but
   6!/8 x parses as 6! / (8x). It is located here because it is shared between
   parse.js and OperatorNode.js (for parsing and printing, respectively).

   This should *not* be exported from mathjs, unlike most of the tests here.
   Its name does not start with 'is' to prevent utils/snapshot.js from thinking
   it should be exported.
*/
function rule2Node(node) {
  return isConstantNode(node) || isOperatorNode(node) && node.args.length === 1 && isConstantNode(node.args[0]) && '-+~'.includes(node.op);
}
function isFunctionAssignmentNode(x) {
  return x && x.isFunctionAssignmentNode === true && x.constructor.prototype.isNode === true || false;
}
function isFunctionNode(x) {
  return x && x.isFunctionNode === true && x.constructor.prototype.isNode === true || false;
}
function isIndexNode(x) {
  return x && x.isIndexNode === true && x.constructor.prototype.isNode === true || false;
}
function isNode(x) {
  return x && x.isNode === true && x.constructor.prototype.isNode === true || false;
}
function isObjectNode(x) {
  return x && x.isObjectNode === true && x.constructor.prototype.isNode === true || false;
}
function isOperatorNode(x) {
  return x && x.isOperatorNode === true && x.constructor.prototype.isNode === true || false;
}
function isParenthesisNode(x) {
  return x && x.isParenthesisNode === true && x.constructor.prototype.isNode === true || false;
}
function isRangeNode(x) {
  return x && x.isRangeNode === true && x.constructor.prototype.isNode === true || false;
}
function isRelationalNode(x) {
  return x && x.isRelationalNode === true && x.constructor.prototype.isNode === true || false;
}
function isSymbolNode(x) {
  return x && x.isSymbolNode === true && x.constructor.prototype.isNode === true || false;
}
function isChain(x) {
  return x && x.constructor.prototype.isChain === true || false;
}
function typeOf(x) {
  var t = (0, _typeof2["default"])(x);
  if (t === 'object') {
    if (x === null) return 'null';
    if (isBigNumber(x)) return 'BigNumber'; // Special: weird mashup with Decimal
    if (x.constructor && x.constructor.name) return x.constructor.name;
    return 'Object'; // just in case
  }
  return t; // can be 'string', 'number', 'boolean', 'function', 'bigint', ...
}