Add tslint

package.json

@@ -8,11 +8,12 @@
   "scripts": {
     "build": "tsc && rollup -c",
     "clean": "rimraf dist",
+    "lint": "tslint --project tsconfig.json",
     "prebuild": "npm run clean",
     "prepare": "npm run build",
     "prepublishOnly": "pkg-ok",
     "start": "jest --watch",
-    "test": "jest"
+    "test": "jest && npm run lint"
   },
   "repository": {
     "type": "git",
@@ -40,6 +41,7 @@
     "rimraf": "2.6.2",
     "rollup": "0.63.4",
     "ts-jest": "23.0.1",
+    "tslint": "5.11.0",
     "typescript": "2.9.2"
   },
   "jest": {

src/index.ts

@@ -8,22 +8,32 @@ export const Reflection = Object.assign(Reflect, {
 });
 
 export type Decorator = ClassDecorator | MemberDecorator;
-export type MemberDecorator = <T>(target: Target, propertyKey: PropertyKey, descriptor?: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
+export type MemberDecorator = <T>(target: Target,
+                                  propertyKey: PropertyKey,
+                                  descriptor?: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
 export type MetadataKey = string;
 export type MetadataValue = Function;
 export type PropertyKey = string | symbol;
 export type Target = object | Function;
 
 const Metadata = new WeakMap();
 
-export function defineMetadata(metadataKey: MetadataKey, metadataValue: MetadataValue, target: Target, propertyKey?: PropertyKey) {
+export function defineMetadata(metadataKey: MetadataKey,
+                               metadataValue: MetadataValue,
+                               target: Target, propertyKey?: PropertyKey) {
   return ordinaryDefineOwnMetadata(metadataKey, metadataValue, target, propertyKey);
 }
 
-export function decorate(decorators: ClassDecorator[], target: Function): Function
-export function decorate(decorators: MemberDecorator[], target: object, propertyKey?: PropertyKey, attributes?: PropertyDescriptor): PropertyDescriptor | undefined
-export function decorate(decorators: Decorator[], target: Target, propertyKey?: PropertyKey, attributes?: PropertyDescriptor): Function | PropertyDescriptor | undefined {
-  if (decorators.length === 0) throw new TypeError();
+export function decorate(decorators: ClassDecorator[], target: Function): Function;
+export function decorate(decorators: MemberDecorator[],
+                         target: object,
+                         propertyKey?: PropertyKey,
+                         attributes?: PropertyDescriptor): PropertyDescriptor | undefined;
+export function decorate(decorators: Decorator[],
+                         target: Target,
+                         propertyKey?: PropertyKey,
+                         attributes?: PropertyDescriptor): Function | PropertyDescriptor | undefined {
+  if (decorators.length === 0) { throw new TypeError(); }
 
   if (typeof target === 'function') {
     return decorateConstructor(decorators as ClassDecorator[], target);
@@ -61,30 +71,40 @@ function decorateConstructor(decorators: ClassDecorator[], target: Function): Fu
   return target;
 }
 
-function decorateProperty(decorators: MemberDecorator[], target: Target, propertyKey: PropertyKey, descriptor?: PropertyDescriptor): PropertyDescriptor | undefined {
+function decorateProperty(decorators: MemberDecorator[],
+                          target: Target,
+                          propertyKey: PropertyKey,
+                          descriptor?: PropertyDescriptor): PropertyDescriptor | undefined {
   decorators.reverse().forEach((decorator: MemberDecorator) => {
     descriptor = decorator(target, propertyKey, descriptor) || descriptor;
   });
   return descriptor;
 }
 
-function ordinaryDefineOwnMetadata(metadataKey: MetadataKey, metadataValue: MetadataValue, target: Target, propertyKey?: PropertyKey): void {
-  if (propertyKey && !['string', 'symbol'].includes(typeof propertyKey)) throw new TypeError();
+function ordinaryDefineOwnMetadata(metadataKey: MetadataKey,
+                                   metadataValue: MetadataValue,
+                                   target: Target,
+                                   propertyKey?: PropertyKey): void {
+  if (propertyKey && !['string', 'symbol'].includes(typeof propertyKey)) { throw new TypeError(); }
 
   (getMetadataMap(target, propertyKey) || createMetadataMap(target, propertyKey))
     .set(metadataKey, metadataValue);
 }
 
-function ordinaryGetMetadata(metadataKey: MetadataKey, target: Target, propertyKey?: PropertyKey): Function | undefined {
+function ordinaryGetMetadata(metadataKey: MetadataKey,
+                             target: Target,
+                             propertyKey?: PropertyKey): Function | undefined {
   return !!ordinaryGetOwnMetadata(metadataKey, target, propertyKey)
     ? ordinaryGetOwnMetadata(metadataKey, target, propertyKey)
     : Object.getPrototypeOf(target)
     ? ordinaryGetMetadata(metadataKey, Object.getPrototypeOf(target), propertyKey)
     : undefined;
 }
 
-function ordinaryGetOwnMetadata(metadataKey: MetadataKey, target: Target, propertyKey?: PropertyKey): Function | undefined {
-  if (target === undefined) throw new TypeError();
+function ordinaryGetOwnMetadata(metadataKey: MetadataKey,
+                                target: Target,
+                                propertyKey?: PropertyKey): Function | undefined {
+  if (target === undefined) { throw new TypeError(); }
   const metadataMap = getMetadataMap(target, propertyKey);
   return metadataMap && metadataMap.get(metadataKey);
 }

tslint.json

@@ -0,0 +1,19 @@
+{
+  "defaultSeverity": "error",
+  "extends": [
+    "tslint:recommended"
+  ],
+  "jsRules": {},
+  "rules": {
+    "quotemark": [true, "single"],
+    "ban-types": [
+      true,
+      ["Object", "Avoid using the `Object` type. Did you mean `object`?"],
+      ["Boolean", "Avoid using the `Boolean` type. Did you mean `boolean`?"],
+      ["Number", "Avoid using the `Number` type. Did you mean `number`?"],
+      ["String", "Avoid using the `String` type. Did you mean `string`?"],
+      ["Symbol", "Avoid using the `Symbol` type. Did you mean `symbol`?"]
+    ]
+  },
+  "rulesDirectory": []
+}