Cosmetic changes

gin.go

@@ -178,25 +178,15 @@ func (engine *Engine) rebuild405Handlers() {
 }
 
 func (engine *Engine) addRoute(method, path string, handlers HandlersChain) {
+	assert1(path[0] == '/', "path must begin with '/'")
+	assert1(len(method) > 0, "HTTP method can not be empty")
+	assert1(len(handlers) > 0, "there must be at least one handler")
+
 	debugPrintRoute(method, path, handlers)
-
-	if path[0] != '/' {
-		panic("path must begin with '/'")
-	}
-	if method == "" {
-		panic("HTTP method can not be empty")
-	}
-	if len(handlers) == 0 {
-		panic("there must be at least one handler")
-	}
-
 	root := engine.trees.get(method)
 	if root == nil {
 		root = new(node)
-		engine.trees = append(engine.trees, methodTree{
-			method: method,
-			root:   root,
-		})
+		engine.trees = append(engine.trees, methodTree{method: method, root: root})
 	}
 	root.addRoute(path, handlers)
 }