class RuboCop::Cop::Performance::RedundantBlockCall

end
yield 1, 2, 3
def another
end
yield
def method
# good
end
func.call 1, 2, 3
def another(&func)
end
block.call
def method(&block)
# bad
@example
where ‘yield` would do just as well.
Identifies the use of a `&block` parameter and `block.call`

def args_include_block_pass?(blockcall) 

def args_include_block_pass?(blockcall)
  _receiver, _call, *args = *blockcall
  args.any?(&:block_pass_type?)
end

def autocorrect(corrector, node)

offenses are registered on the `block.call` nodes 
def autocorrect(corrector, node)
  _receiver, _method, *args = *node
  new_source = String.new(YIELD)
  unless args.empty?
    new_source += if parentheses?(node)
                    OPEN_PAREN
                  else
                    SPACE
                  end
    new_source << args.map(&:source).join(', ')
  end
  new_source << CLOSE_PAREN if parentheses?(node) && !args.empty?
  corrector.replace(node, new_source)
end

def calls_to_report(argname, body) 

def calls_to_report(argname, body)
  return [] if blockarg_assigned?(body, argname) || shadowed_block_argument?(body, argname)
  blockarg_calls(body, argname).map do |call|
    return [] if args_include_block_pass?(call)
    call
  end
end

def on_def(node) 

def on_def(node)
  blockarg_def(node) do |argname, body|
    next unless body
    calls_to_report(argname, body).each do |blockcall|
      next if blockcall.block_literal?
      add_offense(blockcall, message: format(MSG, argname: argname)) do |corrector|
        autocorrect(corrector, blockcall)
      end
    end
  end
end

def shadowed_block_argument?(body, block_argument_of_method_signature) 

def shadowed_block_argument?(body, block_argument_of_method_signature)
  return false unless body.block_type?
  body.arguments.map(&:source).include?(block_argument_of_method_signature.to_s)
end