/
index.ts
672 lines (562 loc) · 32.1 KB
/
index.ts
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/// <reference lib="es2018"/>
/// <reference lib="dom"/>
/// <reference types="node"/>
import {Class, TypedArray, ObservableLike, Primitive} from './types';
const typedArrayTypeNames = [
'Int8Array',
'Uint8Array',
'Uint8ClampedArray',
'Int16Array',
'Uint16Array',
'Int32Array',
'Uint32Array',
'Float32Array',
'Float64Array',
'BigInt64Array',
'BigUint64Array'
] as const;
type TypedArrayTypeName = typeof typedArrayTypeNames[number];
function isTypedArrayName(name: unknown): name is TypedArrayTypeName {
return typedArrayTypeNames.includes(name as TypedArrayTypeName);
}
const objectTypeNames = [
'Function',
'Generator',
'AsyncGenerator',
'GeneratorFunction',
'AsyncGeneratorFunction',
'AsyncFunction',
'Observable',
'Array',
'Buffer',
'Object',
'RegExp',
'Date',
'Error',
'Map',
'Set',
'WeakMap',
'WeakSet',
'ArrayBuffer',
'SharedArrayBuffer',
'DataView',
'Promise',
'URL',
'HTMLElement',
...typedArrayTypeNames
] as const;
type ObjectTypeName = typeof objectTypeNames[number];
function isObjectTypeName(name: unknown): name is ObjectTypeName {
return objectTypeNames.includes(name as ObjectTypeName);
}
const primitiveTypeNames = [
'null',
'undefined',
'string',
'number',
'bigint',
'boolean',
'symbol'
] as const;
type PrimitiveTypeName = typeof primitiveTypeNames[number];
function isPrimitiveTypeName(name: unknown): name is PrimitiveTypeName {
return primitiveTypeNames.includes(name as PrimitiveTypeName);
}
export type TypeName = ObjectTypeName | PrimitiveTypeName;
// eslint-disable-next-line @typescript-eslint/ban-types
function isOfType<T extends Primitive | Function>(type: PrimitiveTypeName | 'function') {
return (value: unknown): value is T => typeof value === type;
}
const {toString} = Object.prototype;
const getObjectType = (value: unknown): ObjectTypeName | undefined => {
const objectTypeName = toString.call(value).slice(8, -1);
if (/HTML\w+Element/.test(objectTypeName) && is.domElement(value)) {
return 'HTMLElement';
}
if (isObjectTypeName(objectTypeName)) {
return objectTypeName;
}
return undefined;
};
const isObjectOfType = <T>(type: ObjectTypeName) => (value: unknown): value is T => getObjectType(value) === type;
function is(value: unknown): TypeName {
if (value === null) {
return 'null';
}
switch (typeof value) {
case 'undefined':
return 'undefined';
case 'string':
return 'string';
case 'number':
return 'number';
case 'boolean':
return 'boolean';
case 'function':
return 'Function';
case 'bigint':
return 'bigint';
case 'symbol':
return 'symbol';
default:
}
if (is.observable(value)) {
return 'Observable';
}
if (is.array(value)) {
return 'Array';
}
if (is.buffer(value)) {
return 'Buffer';
}
const tagType = getObjectType(value);
if (tagType) {
return tagType;
}
if (value instanceof String || value instanceof Boolean || value instanceof Number) {
throw new TypeError('Please don\'t use object wrappers for primitive types');
}
return 'Object';
}
is.undefined = isOfType<undefined>('undefined');
is.string = isOfType<string>('string');
const isNumberType = isOfType<number>('number');
is.number = (value: unknown): value is number => isNumberType(value) && !is.nan(value);
is.bigint = isOfType<bigint>('bigint');
// eslint-disable-next-line @typescript-eslint/ban-types
is.function_ = isOfType<Function>('function');
is.null_ = (value: unknown): value is null => value === null;
is.class_ = (value: unknown): value is Class => is.function_(value) && value.toString().startsWith('class ');
is.boolean = (value: unknown): value is boolean => value === true || value === false;
is.symbol = isOfType<symbol>('symbol');
is.numericString = (value: unknown): value is string =>
is.string(value) && !is.emptyStringOrWhitespace(value) && !Number.isNaN(Number(value));
is.array = <T = unknown>(value: unknown, assertion?: (value: T) => value is T): value is T[] => {
if (!Array.isArray(value)) {
return false;
}
if (!is.function_(assertion)) {
return true;
}
return value.every(assertion);
};
is.buffer = (value: unknown): value is Buffer => (value as any)?.constructor?.isBuffer?.(value) ?? false;
is.nullOrUndefined = (value: unknown): value is null | undefined => is.null_(value) || is.undefined(value);
is.object = (value: unknown): value is object => !is.null_(value) && (typeof value === 'object' || is.function_(value));
is.iterable = <T = unknown>(value: unknown): value is IterableIterator<T> => is.function_((value as IterableIterator<T>)?.[Symbol.iterator]);
is.asyncIterable = <T = unknown>(value: unknown): value is AsyncIterableIterator<T> => is.function_((value as AsyncIterableIterator<T>)?.[Symbol.asyncIterator]);
is.generator = (value: unknown): value is Generator => is.iterable(value) && is.function_(value.next) && is.function_(value.throw);
is.asyncGenerator = (value: unknown): value is AsyncGenerator => is.asyncIterable(value) && is.function_(value.next) && is.function_(value.throw);
is.nativePromise = <T = unknown>(value: unknown): value is Promise<T> =>
isObjectOfType<Promise<T>>('Promise')(value);
const hasPromiseAPI = <T = unknown>(value: unknown): value is Promise<T> =>
is.function_((value as Promise<T>)?.then) &&
is.function_((value as Promise<T>)?.catch);
is.promise = <T = unknown>(value: unknown): value is Promise<T> => is.nativePromise(value) || hasPromiseAPI(value);
is.generatorFunction = isObjectOfType<GeneratorFunction>('GeneratorFunction');
is.asyncGeneratorFunction = (value: unknown): value is ((...args: any[]) => Promise<unknown>) => getObjectType(value) === 'AsyncGeneratorFunction';
is.asyncFunction = <T = unknown>(value: unknown): value is ((...args: any[]) => Promise<T>) => getObjectType(value) === 'AsyncFunction';
// eslint-disable-next-line no-prototype-builtins, @typescript-eslint/ban-types
is.boundFunction = (value: unknown): value is Function => is.function_(value) && !value.hasOwnProperty('prototype');
is.regExp = isObjectOfType<RegExp>('RegExp');
is.date = isObjectOfType<Date>('Date');
is.error = isObjectOfType<Error>('Error');
is.map = <Key = unknown, Value = unknown>(value: unknown): value is Map<Key, Value> => isObjectOfType<Map<Key, Value>>('Map')(value);
is.set = <T = unknown>(value: unknown): value is Set<T> => isObjectOfType<Set<T>>('Set')(value);
is.weakMap = <Key extends object = object, Value = unknown>(value: unknown): value is WeakMap<Key, Value> => isObjectOfType<WeakMap<Key, Value>>('WeakMap')(value);
is.weakSet = (value: unknown): value is WeakSet<object> => isObjectOfType<WeakSet<object>>('WeakSet')(value);
is.int8Array = isObjectOfType<Int8Array>('Int8Array');
is.uint8Array = isObjectOfType<Uint8Array>('Uint8Array');
is.uint8ClampedArray = isObjectOfType<Uint8ClampedArray>('Uint8ClampedArray');
is.int16Array = isObjectOfType<Int16Array>('Int16Array');
is.uint16Array = isObjectOfType<Uint16Array>('Uint16Array');
is.int32Array = isObjectOfType<Int32Array>('Int32Array');
is.uint32Array = isObjectOfType<Uint32Array>('Uint32Array');
is.float32Array = isObjectOfType<Float32Array>('Float32Array');
is.float64Array = isObjectOfType<Float64Array>('Float64Array');
is.bigInt64Array = isObjectOfType<BigInt64Array>('BigInt64Array');
is.bigUint64Array = isObjectOfType<BigUint64Array>('BigUint64Array');
is.arrayBuffer = isObjectOfType<ArrayBuffer>('ArrayBuffer');
is.sharedArrayBuffer = isObjectOfType<SharedArrayBuffer>('SharedArrayBuffer');
is.dataView = isObjectOfType<DataView>('DataView');
is.directInstanceOf = <T>(instance: unknown, class_: Class<T>): instance is T => Object.getPrototypeOf(instance) === class_.prototype;
is.urlInstance = (value: unknown): value is URL => isObjectOfType<URL>('URL')(value);
is.urlString = (value: unknown): value is string => {
if (!is.string(value)) {
return false;
}
try {
new URL(value); // eslint-disable-line no-new
return true;
} catch {
return false;
}
};
// TODO: Use the `not` operator with a type guard here when it's available.
// Example: `is.truthy = (value: unknown): value is (not false | not 0 | not '' | not undefined | not null) => Boolean(value);`
is.truthy = (value: unknown) => Boolean(value);
// Example: `is.falsy = (value: unknown): value is (not true | 0 | '' | undefined | null) => Boolean(value);`
is.falsy = (value: unknown) => !value;
is.nan = (value: unknown) => Number.isNaN(value as number);
is.primitive = (value: unknown): value is Primitive => is.null_(value) || isPrimitiveTypeName(typeof value);
is.integer = (value: unknown): value is number => Number.isInteger(value as number);
is.safeInteger = (value: unknown): value is number => Number.isSafeInteger(value as number);
is.plainObject = <Value = unknown>(value: unknown): value is Record<PropertyKey, Value> => {
// From: https://github.com/sindresorhus/is-plain-obj/blob/main/index.js
if (toString.call(value) !== '[object Object]') {
return false;
}
const prototype = Object.getPrototypeOf(value);
return prototype === null || prototype === Object.getPrototypeOf({});
};
is.typedArray = (value: unknown): value is TypedArray => isTypedArrayName(getObjectType(value));
export interface ArrayLike<T> {
readonly [index: number]: T;
readonly length: number;
}
const isValidLength = (value: unknown): value is number => is.safeInteger(value) && value >= 0;
is.arrayLike = <T = unknown>(value: unknown): value is ArrayLike<T> => !is.nullOrUndefined(value) && !is.function_(value) && isValidLength((value as ArrayLike<T>).length);
is.inRange = (value: number, range: number | number[]): value is number => {
if (is.number(range)) {
return value >= Math.min(0, range) && value <= Math.max(range, 0);
}
if (is.array(range) && range.length === 2) {
return value >= Math.min(...range) && value <= Math.max(...range);
}
throw new TypeError(`Invalid range: ${JSON.stringify(range)}`);
};
const NODE_TYPE_ELEMENT = 1;
const DOM_PROPERTIES_TO_CHECK: Array<(keyof HTMLElement)> = [
'innerHTML',
'ownerDocument',
'style',
'attributes',
'nodeValue'
];
is.domElement = (value: unknown): value is HTMLElement => {
return is.object(value) &&
(value as HTMLElement).nodeType === NODE_TYPE_ELEMENT &&
is.string((value as HTMLElement).nodeName) &&
!is.plainObject(value) &&
DOM_PROPERTIES_TO_CHECK.every(property => property in value);
};
is.observable = (value: unknown): value is ObservableLike => {
if (!value) {
return false;
}
// eslint-disable-next-line no-use-extend-native/no-use-extend-native
if (value === (value as any)[Symbol.observable]?.()) {
return true;
}
if (value === (value as any)['@@observable']?.()) {
return true;
}
return false;
};
export interface NodeStream extends NodeJS.EventEmitter {
pipe<T extends NodeJS.WritableStream>(destination: T, options?: {end?: boolean}): T;
}
is.nodeStream = (value: unknown): value is NodeStream => is.object(value) && is.function_((value as NodeStream).pipe) && !is.observable(value);
is.infinite = (value: unknown): value is number => value === Infinity || value === -Infinity;
const isAbsoluteMod2 = (remainder: number) => (value: number): value is number => is.integer(value) && Math.abs(value % 2) === remainder;
is.evenInteger = isAbsoluteMod2(0);
is.oddInteger = isAbsoluteMod2(1);
is.emptyArray = (value: unknown): value is never[] => is.array(value) && value.length === 0;
is.nonEmptyArray = (value: unknown): value is unknown[] => is.array(value) && value.length > 0;
is.emptyString = (value: unknown): value is '' => is.string(value) && value.length === 0;
// TODO: Use `not ''` when the `not` operator is available.
is.nonEmptyString = (value: unknown): value is string => is.string(value) && value.length > 0;
const isWhiteSpaceString = (value: unknown): value is string => is.string(value) && !/\S/.test(value);
is.emptyStringOrWhitespace = (value: unknown): value is string => is.emptyString(value) || isWhiteSpaceString(value);
is.emptyObject = <Key extends keyof any = string>(value: unknown): value is Record<Key, never> => is.object(value) && !is.map(value) && !is.set(value) && Object.keys(value).length === 0;
// TODO: Use `not` operator here to remove `Map` and `Set` from type guard:
// - https://github.com/Microsoft/TypeScript/pull/29317
is.nonEmptyObject = <Key extends keyof any = string, Value = unknown>(value: unknown): value is Record<Key, Value> => is.object(value) && !is.map(value) && !is.set(value) && Object.keys(value).length > 0;
is.emptySet = (value: unknown): value is Set<never> => is.set(value) && value.size === 0;
is.nonEmptySet = <T = unknown>(value: unknown): value is Set<T> => is.set(value) && value.size > 0;
is.emptyMap = (value: unknown): value is Map<never, never> => is.map(value) && value.size === 0;
is.nonEmptyMap = <Key = unknown, Value = unknown>(value: unknown): value is Map<Key, Value> => is.map(value) && value.size > 0;
// `PropertyKey` is any value that can be used as an object key (string, number, or symbol)
is.propertyKey = (value: unknown): value is PropertyKey => is.any([is.string, is.number, is.symbol], value);
export type Predicate = (value: unknown) => boolean;
type ArrayMethod = (fn: (value: unknown, index: number, array: unknown[]) => boolean, thisArg?: unknown) => boolean;
const predicateOnArray = (method: ArrayMethod, predicate: Predicate, values: unknown[]) => {
if (!is.function_(predicate)) {
throw new TypeError(`Invalid predicate: ${JSON.stringify(predicate)}`);
}
if (values.length === 0) {
throw new TypeError('Invalid number of values');
}
return method.call(values, predicate);
};
is.any = (predicate: Predicate | Predicate[], ...values: unknown[]): boolean => {
const predicates = is.array(predicate) ? predicate : [predicate];
return predicates.some(singlePredicate =>
predicateOnArray(Array.prototype.some, singlePredicate, values)
);
};
is.all = (predicate: Predicate, ...values: unknown[]): boolean => predicateOnArray(Array.prototype.every, predicate, values);
const assertType = (condition: boolean, description: string, value: unknown, options: {multipleValues?: boolean} = {}): asserts condition => {
if (!condition) {
const {multipleValues} = options;
const valuesMessage = multipleValues ?
`received values of types ${[
...new Set(
(value as any[]).map(singleValue => `\`${is(singleValue)}\``)
)
].join(', ')}` :
`received value of type \`${is(value)}\``;
throw new TypeError(`Expected value which is \`${description}\`, ${valuesMessage}.`);
}
};
export const enum AssertionTypeDescription {
class_ = 'Class',
numericString = 'string with a number',
nullOrUndefined = 'null or undefined',
iterable = 'Iterable',
asyncIterable = 'AsyncIterable',
nativePromise = 'native Promise',
urlString = 'string with a URL',
truthy = 'truthy',
falsy = 'falsy',
nan = 'NaN',
primitive = 'primitive',
integer = 'integer',
safeInteger = 'integer',
plainObject = 'plain object',
arrayLike = 'array-like',
typedArray = 'TypedArray',
domElement = 'HTMLElement',
nodeStream = 'Node.js Stream',
infinite = 'infinite number',
emptyArray = 'empty array',
nonEmptyArray = 'non-empty array',
emptyString = 'empty string',
nonEmptyString = 'non-empty string',
emptyStringOrWhitespace = 'empty string or whitespace',
emptyObject = 'empty object',
nonEmptyObject = 'non-empty object',
emptySet = 'empty set',
nonEmptySet = 'non-empty set',
emptyMap = 'empty map',
nonEmptyMap = 'non-empty map',
evenInteger = 'even integer',
oddInteger = 'odd integer',
directInstanceOf = 'T',
inRange = 'in range',
any = 'predicate returns truthy for any value',
all = 'predicate returns truthy for all values',
}
// Type assertions have to be declared with an explicit type.
interface Assert {
// Unknowns.
undefined: (value: unknown) => asserts value is undefined;
string: (value: unknown) => asserts value is string;
number: (value: unknown) => asserts value is number;
bigint: (value: unknown) => asserts value is bigint;
// eslint-disable-next-line @typescript-eslint/ban-types
function_: (value: unknown) => asserts value is Function;
null_: (value: unknown) => asserts value is null;
class_: (value: unknown) => asserts value is Class;
boolean: (value: unknown) => asserts value is boolean;
symbol: (value: unknown) => asserts value is symbol;
numericString: (value: unknown) => asserts value is string;
array: <T = unknown>(value: unknown, assertion?: (element: unknown) => asserts element is T) => asserts value is T[];
buffer: (value: unknown) => asserts value is Buffer;
nullOrUndefined: (value: unknown) => asserts value is null | undefined;
object: <Key extends keyof any = string, Value = unknown>(value: unknown) => asserts value is Record<Key, Value>;
iterable: <T = unknown>(value: unknown) => asserts value is Iterable<T>;
asyncIterable: <T = unknown>(value: unknown) => asserts value is AsyncIterable<T>;
generator: (value: unknown) => asserts value is Generator;
asyncGenerator: (value: unknown) => asserts value is AsyncGenerator;
nativePromise: <T = unknown>(value: unknown) => asserts value is Promise<T>;
promise: <T = unknown>(value: unknown) => asserts value is Promise<T>;
generatorFunction: (value: unknown) => asserts value is GeneratorFunction;
asyncGeneratorFunction: (value: unknown) => asserts value is AsyncGeneratorFunction;
// eslint-disable-next-line @typescript-eslint/ban-types
asyncFunction: (value: unknown) => asserts value is Function;
// eslint-disable-next-line @typescript-eslint/ban-types
boundFunction: (value: unknown) => asserts value is Function;
regExp: (value: unknown) => asserts value is RegExp;
date: (value: unknown) => asserts value is Date;
error: (value: unknown) => asserts value is Error;
map: <Key = unknown, Value = unknown>(value: unknown) => asserts value is Map<Key, Value>;
set: <T = unknown>(value: unknown) => asserts value is Set<T>;
weakMap: <Key extends object = object, Value = unknown>(value: unknown) => asserts value is WeakMap<Key, Value>;
weakSet: <T extends object = object>(value: unknown) => asserts value is WeakSet<T>;
int8Array: (value: unknown) => asserts value is Int8Array;
uint8Array: (value: unknown) => asserts value is Uint8Array;
uint8ClampedArray: (value: unknown) => asserts value is Uint8ClampedArray;
int16Array: (value: unknown) => asserts value is Int16Array;
uint16Array: (value: unknown) => asserts value is Uint16Array;
int32Array: (value: unknown) => asserts value is Int32Array;
uint32Array: (value: unknown) => asserts value is Uint32Array;
float32Array: (value: unknown) => asserts value is Float32Array;
float64Array: (value: unknown) => asserts value is Float64Array;
bigInt64Array: (value: unknown) => asserts value is BigInt64Array;
bigUint64Array: (value: unknown) => asserts value is BigUint64Array;
arrayBuffer: (value: unknown) => asserts value is ArrayBuffer;
sharedArrayBuffer: (value: unknown) => asserts value is SharedArrayBuffer;
dataView: (value: unknown) => asserts value is DataView;
urlInstance: (value: unknown) => asserts value is URL;
urlString: (value: unknown) => asserts value is string;
truthy: (value: unknown) => asserts value is unknown;
falsy: (value: unknown) => asserts value is unknown;
nan: (value: unknown) => asserts value is unknown;
primitive: (value: unknown) => asserts value is Primitive;
integer: (value: unknown) => asserts value is number;
safeInteger: (value: unknown) => asserts value is number;
plainObject: <Value = unknown>(value: unknown) => asserts value is Record<PropertyKey, Value>;
typedArray: (value: unknown) => asserts value is TypedArray;
arrayLike: <T = unknown>(value: unknown) => asserts value is ArrayLike<T>;
domElement: (value: unknown) => asserts value is HTMLElement;
observable: (value: unknown) => asserts value is ObservableLike;
nodeStream: (value: unknown) => asserts value is NodeStream;
infinite: (value: unknown) => asserts value is number;
emptyArray: (value: unknown) => asserts value is never[];
nonEmptyArray: (value: unknown) => asserts value is unknown[];
emptyString: (value: unknown) => asserts value is '';
nonEmptyString: (value: unknown) => asserts value is string;
emptyStringOrWhitespace: (value: unknown) => asserts value is string;
emptyObject: <Key extends keyof any = string>(value: unknown) => asserts value is Record<Key, never>;
nonEmptyObject: <Key extends keyof any = string, Value = unknown>(value: unknown) => asserts value is Record<Key, Value>;
emptySet: (value: unknown) => asserts value is Set<never>;
nonEmptySet: <T = unknown>(value: unknown) => asserts value is Set<T>;
emptyMap: (value: unknown) => asserts value is Map<never, never>;
nonEmptyMap: <Key = unknown, Value = unknown>(value: unknown) => asserts value is Map<Key, Value>;
propertyKey: (value: unknown) => asserts value is PropertyKey;
// Numbers.
evenInteger: (value: number) => asserts value is number;
oddInteger: (value: number) => asserts value is number;
// Two arguments.
directInstanceOf: <T>(instance: unknown, class_: Class<T>) => asserts instance is T;
inRange: (value: number, range: number | number[]) => asserts value is number;
// Variadic functions.
any: (predicate: Predicate | Predicate[], ...values: unknown[]) => void | never;
all: (predicate: Predicate, ...values: unknown[]) => void | never;
}
export const assert: Assert = {
// Unknowns.
undefined: (value: unknown): asserts value is undefined => assertType(is.undefined(value), 'undefined', value),
string: (value: unknown): asserts value is string => assertType(is.string(value), 'string', value),
number: (value: unknown): asserts value is number => assertType(is.number(value), 'number', value),
bigint: (value: unknown): asserts value is bigint => assertType(is.bigint(value), 'bigint', value),
// eslint-disable-next-line @typescript-eslint/ban-types
function_: (value: unknown): asserts value is Function => assertType(is.function_(value), 'Function', value),
null_: (value: unknown): asserts value is null => assertType(is.null_(value), 'null', value),
class_: (value: unknown): asserts value is Class => assertType(is.class_(value), AssertionTypeDescription.class_, value),
boolean: (value: unknown): asserts value is boolean => assertType(is.boolean(value), 'boolean', value),
symbol: (value: unknown): asserts value is symbol => assertType(is.symbol(value), 'symbol', value),
numericString: (value: unknown): asserts value is string => assertType(is.numericString(value), AssertionTypeDescription.numericString, value),
array: <T = unknown>(value: unknown, assertion?: (element: unknown) => asserts element is T): asserts value is T[] => {
const assert: (condition: boolean, description: string, value: unknown) => asserts condition = assertType;
assert(is.array(value), 'Array', value);
if (assertion) {
value.forEach(assertion);
}
},
buffer: (value: unknown): asserts value is Buffer => assertType(is.buffer(value), 'Buffer', value),
nullOrUndefined: (value: unknown): asserts value is null | undefined => assertType(is.nullOrUndefined(value), AssertionTypeDescription.nullOrUndefined, value),
object: (value: unknown): asserts value is object => assertType(is.object(value), 'Object', value),
iterable: <T = unknown>(value: unknown): asserts value is Iterable<T> => assertType(is.iterable(value), AssertionTypeDescription.iterable, value),
asyncIterable: <T = unknown>(value: unknown): asserts value is AsyncIterable<T> => assertType(is.asyncIterable(value), AssertionTypeDescription.asyncIterable, value),
generator: (value: unknown): asserts value is Generator => assertType(is.generator(value), 'Generator', value),
asyncGenerator: (value: unknown): asserts value is AsyncGenerator => assertType(is.asyncGenerator(value), 'AsyncGenerator', value),
nativePromise: <T = unknown>(value: unknown): asserts value is Promise<T> => assertType(is.nativePromise(value), AssertionTypeDescription.nativePromise, value),
promise: <T = unknown>(value: unknown): asserts value is Promise<T> => assertType(is.promise(value), 'Promise', value),
generatorFunction: (value: unknown): asserts value is GeneratorFunction => assertType(is.generatorFunction(value), 'GeneratorFunction', value),
asyncGeneratorFunction: (value: unknown): asserts value is AsyncGeneratorFunction => assertType(is.asyncGeneratorFunction(value), 'AsyncGeneratorFunction', value),
// eslint-disable-next-line @typescript-eslint/ban-types
asyncFunction: (value: unknown): asserts value is Function => assertType(is.asyncFunction(value), 'AsyncFunction', value),
// eslint-disable-next-line @typescript-eslint/ban-types
boundFunction: (value: unknown): asserts value is Function => assertType(is.boundFunction(value), 'Function', value),
regExp: (value: unknown): asserts value is RegExp => assertType(is.regExp(value), 'RegExp', value),
date: (value: unknown): asserts value is Date => assertType(is.date(value), 'Date', value),
error: (value: unknown): asserts value is Error => assertType(is.error(value), 'Error', value),
map: <Key = unknown, Value = unknown>(value: unknown): asserts value is Map<Key, Value> => assertType(is.map(value), 'Map', value),
set: <T = unknown>(value: unknown): asserts value is Set<T> => assertType(is.set(value), 'Set', value),
weakMap: <Key extends object = object, Value = unknown>(value: unknown): asserts value is WeakMap<Key, Value> => assertType(is.weakMap(value), 'WeakMap', value),
weakSet: <T extends object = object>(value: unknown): asserts value is WeakSet<T> => assertType(is.weakSet(value), 'WeakSet', value),
int8Array: (value: unknown): asserts value is Int8Array => assertType(is.int8Array(value), 'Int8Array', value),
uint8Array: (value: unknown): asserts value is Uint8Array => assertType(is.uint8Array(value), 'Uint8Array', value),
uint8ClampedArray: (value: unknown): asserts value is Uint8ClampedArray => assertType(is.uint8ClampedArray(value), 'Uint8ClampedArray', value),
int16Array: (value: unknown): asserts value is Int16Array => assertType(is.int16Array(value), 'Int16Array', value),
uint16Array: (value: unknown): asserts value is Uint16Array => assertType(is.uint16Array(value), 'Uint16Array', value),
int32Array: (value: unknown): asserts value is Int32Array => assertType(is.int32Array(value), 'Int32Array', value),
uint32Array: (value: unknown): asserts value is Uint32Array => assertType(is.uint32Array(value), 'Uint32Array', value),
float32Array: (value: unknown): asserts value is Float32Array => assertType(is.float32Array(value), 'Float32Array', value),
float64Array: (value: unknown): asserts value is Float64Array => assertType(is.float64Array(value), 'Float64Array', value),
bigInt64Array: (value: unknown): asserts value is BigInt64Array => assertType(is.bigInt64Array(value), 'BigInt64Array', value),
bigUint64Array: (value: unknown): asserts value is BigUint64Array => assertType(is.bigUint64Array(value), 'BigUint64Array', value),
arrayBuffer: (value: unknown): asserts value is ArrayBuffer => assertType(is.arrayBuffer(value), 'ArrayBuffer', value),
sharedArrayBuffer: (value: unknown): asserts value is SharedArrayBuffer => assertType(is.sharedArrayBuffer(value), 'SharedArrayBuffer', value),
dataView: (value: unknown): asserts value is DataView => assertType(is.dataView(value), 'DataView', value),
urlInstance: (value: unknown): asserts value is URL => assertType(is.urlInstance(value), 'URL', value),
urlString: (value: unknown): asserts value is string => assertType(is.urlString(value), AssertionTypeDescription.urlString, value),
truthy: (value: unknown): asserts value is unknown => assertType(is.truthy(value), AssertionTypeDescription.truthy, value),
falsy: (value: unknown): asserts value is unknown => assertType(is.falsy(value), AssertionTypeDescription.falsy, value),
nan: (value: unknown): asserts value is unknown => assertType(is.nan(value), AssertionTypeDescription.nan, value),
primitive: (value: unknown): asserts value is Primitive => assertType(is.primitive(value), AssertionTypeDescription.primitive, value),
integer: (value: unknown): asserts value is number => assertType(is.integer(value), AssertionTypeDescription.integer, value),
safeInteger: (value: unknown): asserts value is number => assertType(is.safeInteger(value), AssertionTypeDescription.safeInteger, value),
plainObject: <Value = unknown>(value: unknown): asserts value is Record<PropertyKey, Value> => assertType(is.plainObject(value), AssertionTypeDescription.plainObject, value),
typedArray: (value: unknown): asserts value is TypedArray => assertType(is.typedArray(value), AssertionTypeDescription.typedArray, value),
arrayLike: <T = unknown>(value: unknown): asserts value is ArrayLike<T> => assertType(is.arrayLike(value), AssertionTypeDescription.arrayLike, value),
domElement: (value: unknown): asserts value is HTMLElement => assertType(is.domElement(value), AssertionTypeDescription.domElement, value),
observable: (value: unknown): asserts value is ObservableLike => assertType(is.observable(value), 'Observable', value),
nodeStream: (value: unknown): asserts value is NodeStream => assertType(is.nodeStream(value), AssertionTypeDescription.nodeStream, value),
infinite: (value: unknown): asserts value is number => assertType(is.infinite(value), AssertionTypeDescription.infinite, value),
emptyArray: (value: unknown): asserts value is never[] => assertType(is.emptyArray(value), AssertionTypeDescription.emptyArray, value),
nonEmptyArray: (value: unknown): asserts value is unknown[] => assertType(is.nonEmptyArray(value), AssertionTypeDescription.nonEmptyArray, value),
emptyString: (value: unknown): asserts value is '' => assertType(is.emptyString(value), AssertionTypeDescription.emptyString, value),
nonEmptyString: (value: unknown): asserts value is string => assertType(is.nonEmptyString(value), AssertionTypeDescription.nonEmptyString, value),
emptyStringOrWhitespace: (value: unknown): asserts value is string => assertType(is.emptyStringOrWhitespace(value), AssertionTypeDescription.emptyStringOrWhitespace, value),
emptyObject: <Key extends keyof any = string>(value: unknown): asserts value is Record<Key, never> => assertType(is.emptyObject(value), AssertionTypeDescription.emptyObject, value),
nonEmptyObject: <Key extends keyof any = string, Value = unknown>(value: unknown): asserts value is Record<Key, Value> => assertType(is.nonEmptyObject(value), AssertionTypeDescription.nonEmptyObject, value),
emptySet: (value: unknown): asserts value is Set<never> => assertType(is.emptySet(value), AssertionTypeDescription.emptySet, value),
nonEmptySet: <T = unknown>(value: unknown): asserts value is Set<T> => assertType(is.nonEmptySet(value), AssertionTypeDescription.nonEmptySet, value),
emptyMap: (value: unknown): asserts value is Map<never, never> => assertType(is.emptyMap(value), AssertionTypeDescription.emptyMap, value),
nonEmptyMap: <Key = unknown, Value = unknown>(value: unknown): asserts value is Map<Key, Value> => assertType(is.nonEmptyMap(value), AssertionTypeDescription.nonEmptyMap, value),
propertyKey: (value: unknown): asserts value is number => assertType(is.propertyKey(value), 'PropertyKey', value),
// Numbers.
evenInteger: (value: number): asserts value is number => assertType(is.evenInteger(value), AssertionTypeDescription.evenInteger, value),
oddInteger: (value: number): asserts value is number => assertType(is.oddInteger(value), AssertionTypeDescription.oddInteger, value),
// Two arguments.
directInstanceOf: <T>(instance: unknown, class_: Class<T>): asserts instance is T => assertType(is.directInstanceOf(instance, class_), AssertionTypeDescription.directInstanceOf, instance),
inRange: (value: number, range: number | number[]): asserts value is number => assertType(is.inRange(value, range), AssertionTypeDescription.inRange, value),
// Variadic functions.
any: (predicate: Predicate | Predicate[], ...values: unknown[]): void | never => {
return assertType(is.any(predicate, ...values), AssertionTypeDescription.any, values, {multipleValues: true});
},
all: (predicate: Predicate, ...values: unknown[]): void | never => assertType(is.all(predicate, ...values), AssertionTypeDescription.all, values, {multipleValues: true})
};
// Some few keywords are reserved, but we'll populate them for Node.js users
// See https://github.com/Microsoft/TypeScript/issues/2536
Object.defineProperties(is, {
class: {
value: is.class_
},
function: {
value: is.function_
},
null: {
value: is.null_
}
});
Object.defineProperties(assert, {
class: {
value: assert.class_
},
function: {
value: assert.function_
},
null: {
value: assert.null_
}
});
export default is;
export {Class, TypedArray, ObservableLike, Primitive} from './types';
// For CommonJS default export support
module.exports = is;
module.exports.default = is;
module.exports.assert = assert;