Revert root_prefix and to_regexp

Author: ericproulx

lib/grape/path.rb

@@ -7,19 +7,22 @@ def self.prepare(raw_path, namespace, settings)
       Path.new(raw_path, namespace, settings)
     end
 
-    attr_reader :raw_path, :namespace, :settings, :root_prefix
+    attr_reader :raw_path, :namespace, :settings
 
     def initialize(raw_path, namespace, settings)
       @raw_path = raw_path
       @namespace = namespace
       @settings = settings
-      @root_prefix = settings[:root_prefix]&.to_s&.split('/')
     end
 
     def mount_path
       settings[:mount_path]
     end
 
+    def root_prefix
+      split_setting(:root_prefix)
+    end
+
     def uses_specific_format?
       if settings.key?(:format) && settings.key?(:content_types)
         settings[:format] && Array(settings[:content_types]).size == 1

lib/grape/router.rb

@@ -30,7 +30,7 @@ def compile!
         routes = map[method]
         optimized_map = routes.map.with_index do |route, index|
           route.index = index
-          Regexp.new("(?<_#{index}>#{route.to_regexp})")
+          Regexp.new("(?<_#{index}>#{route.pattern.to_regexp})")
         end
         @optimized_map[method] = Regexp.union(optimized_map)
       end