type check util/warn

Author: yyx990803

src/create-matcher.js

@@ -104,7 +104,7 @@ export function createMatcher (routes: Array<RouteConfig>): Matcher {
         hash
       }, undefined, location)
     } else {
-      warn(`invalid redirect option: ${JSON.stringify(redirect)}`)
+      warn(false, `invalid redirect option: ${JSON.stringify(redirect)}`)
       return createRouteContext(null, location)
     }
   }
@@ -174,7 +174,7 @@ function fillParams (
       (regexpCompileCache[path] = Regexp.compile(path))
     return filler(params || {}, { pretty: true })
   } catch (e) {
-    assert(`missing param for ${routeMsg}: ${e.message}`)
+    assert(false, `missing param for ${routeMsg}: ${e.message}`)
     return ''
   }
 }

src/util/warn.js

@@ -1,10 +1,12 @@
-export function assert (condition, message) {
+/* @flow */
+
+export function assert (condition: any, message: string) {
   if (!condition) {
     throw new Error(`[vue-router] ${message}`)
   }
 }
 
-export function warn (condition, message) {
+export function warn (condition: any, message: string) {
   if (!condition) {
     typeof console !== 'undefined' && console.warn(`[vue-router] ${message}`)
   }