lib/rom/sql/schema/index_dsl.rb in rom-sql-3.6.4 vs lib/rom/sql/schema/index_dsl.rb in rom-sql-4.0.0.alpha1

@@ -1,26 +1,24 @@
 # frozen_string_literal: true
 
-require 'set'
+require "set"
 
 module ROM
   module SQL
     class Schema < ROM::Schema
       # @api public
-      class IndexDSL # < BasicObject
+      class IndexDSL
         extend Initializer
 
         option :attr_class
 
         attr_reader :registry
 
         # @api private
         def initialize(*, &block)
           super
-
           @registry = []
-
-          instance_exec(&block)
+          instance_exec(&block) if block
         end
         ruby2_keywords(:initialize) if respond_to?(:ruby2_keywords, true)
 
         # @api public
         def index(*attributes, **options)