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RuboCop::Cop::Style::MultilineBlockChain

This cop checks for chaining of a block after another block that spans multiple lines.

@example

Thread.list.find_all do |t|
  t.alive?
end.map do |t|
  t.object_id
end

Constants

MSG

Public Instance Methods

on_block(node) click to toggle source
# File lib/rubocop/cop/style/multiline_block_chain.rb, line 18
def on_block(node)
  method, _args, _body = *node
  on_node(:send, method) do |send_node|
    receiver, _method_name, *_args = *send_node
    if receiver && receiver.type == :block
      # The begin and end could also be braces, but we call the
      # variables do... and end...
      do_kw_loc, end_kw_loc = receiver.loc.begin, receiver.loc.end

      if do_kw_loc.line != end_kw_loc.line
        range =
          Parser::Source::Range.new(end_kw_loc.source_buffer,
                                    end_kw_loc.begin_pos,
                                    method.loc.expression.end_pos)
        add_offense(nil, range)
        # Done. If there are more blocks in the chain, they will be
        # found by subsequent calls to on_block.
        break
      end
    end
  end
end

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