diff options
Diffstat (limited to 'mrbgems/mruby-enumerator/mrblib/enumerator.rb')
| -rw-r--r-- | mrbgems/mruby-enumerator/mrblib/enumerator.rb | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mrbgems/mruby-enumerator/mrblib/enumerator.rb b/mrbgems/mruby-enumerator/mrblib/enumerator.rb index 7ca1d5eb6..dbc7d3004 100644 --- a/mrbgems/mruby-enumerator/mrblib/enumerator.rb +++ b/mrbgems/mruby-enumerator/mrblib/enumerator.rb @@ -614,6 +614,9 @@ module Kernel # enum.first(4) # => [1, 1, 1, 2] # def to_enum(meth=:each, *args) + unless self.respond_to?(meth) + raise ArgumentError, "undefined method #{meth}" + end Enumerator.new self, meth, *args end alias enum_for to_enum |