function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); } /* eslint-disable flowtype/no-weak-types */ import nodejsCustomInspectSymbol from "./nodejsCustomInspectSymbol.mjs"; var MAX_ARRAY_LENGTH = 10; var MAX_RECURSIVE_DEPTH = 2; /** * Used to print values in error messages. */ export default function inspect(value) { return formatValue(value, []); } function formatValue(value, seenValues) { switch (_typeof(value)) { case 'string': return JSON.stringify(value); case 'function': return value.name ? "[function ".concat(value.name, "]") : '[function]'; case 'object': if (value === null) { return 'null'; } return formatObjectValue(value, seenValues); default: return String(value); } } function formatObjectValue(value, previouslySeenValues) { if (previouslySeenValues.indexOf(value) !== -1) { return '[Circular]'; } var seenValues = [].concat(previouslySeenValues, [value]); var customInspectFn = getCustomFn(value); if (customInspectFn !== undefined) { var customValue = customInspectFn.call(value); // check for infinite recursion if (customValue !== value) { return typeof customValue === 'string' ? customValue : formatValue(customValue, seenValues); } } else if (Array.isArray(value)) { return formatArray(value, seenValues); } return formatObject(value, seenValues); } function formatObject(object, seenValues) { var keys = Object.keys(object); if (keys.length === 0) { return '{}'; } if (seenValues.length > MAX_RECURSIVE_DEPTH) { return '[' + getObjectTag(object) + ']'; } var properties = keys.map(function (key) { var value = formatValue(object[key], seenValues); return key + ': ' + value; }); return '{ ' + properties.join(', ') + ' }'; } function formatArray(array, seenValues) { if (array.length === 0) { return '[]'; } if (seenValues.length > MAX_RECURSIVE_DEPTH) { return '[Array]'; } var len = Math.min(MAX_ARRAY_LENGTH, array.length); var remaining = array.length - len; var items = []; for (var i = 0; i < len; ++i) { items.push(formatValue(array[i], seenValues)); } if (remaining === 1) { items.push('... 1 more item'); } else if (remaining > 1) { items.push("... ".concat(remaining, " more items")); } return '[' + items.join(', ') + ']'; } function getCustomFn(object) { var customInspectFn = object[String(nodejsCustomInspectSymbol)]; if (typeof customInspectFn === 'function') { return customInspectFn; } if (typeof object.inspect === 'function') { return object.inspect; } } function getObjectTag(object) { var tag = Object.prototype.toString.call(object).replace(/^\[object /, '').replace(/]$/, ''); if (tag === 'Object' && typeof object.constructor === 'function') { var name = object.constructor.name; if (typeof name === 'string' && name !== '') { return name; } } return tag; }