Class: RuboCop::Cop::Style::MethodCalledOnDoEndBlock

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/style/method_called_on_do_end_block.rb

Overview

This cop checks for methods called on a do…end block. The point of this check is that it’s easy to miss the call tacked on to the block when reading code.

Examples:


a do
  b
end.c

Constant Summary collapse

MSG = 
'Avoid chaining a method call on a do...end block.'.freeze

Constants included from Util

Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #excluded_file?, #extra_details?, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #reference_url, #relevant_file?, #style_guide_url, #target_ruby_version

Methods included from Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search_body

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, block_length, comment_line?, directions, double_quotes_acceptable?, double_quotes_required?, effective_column, ends_its_line?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, move_pos, needs_escaping?, numeric_range_size, on_node, operator?, parentheses?, parenthesized_call?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, to_string_literal, to_symbol_literal, within_node?

Methods included from PathUtil

absolute?, match_path?, relative_path

Constructor Details

This class inherits a constructor from RuboCop::Cop::Cop

Instance Method Details

#on_block(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/method_called_on_do_end_block.rb', line 19

def on_block(node)
  method, _args, _body = *node
  # If the method that is chained on the do...end block is itself a
  # method with a block, we allow it. It's pretty safe to assume that
  # these calls are not missed by anyone reading code. We also want to
  # avoid double reporting of offenses checked by the
  # MultilineBlockChain cop.
  ignore_node(method)
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/method_called_on_do_end_block.rb', line 29

def on_send(node)
  return if ignored_node?(node)
  receiver, _method_name, *_args = *node
  return unless receiver && receiver.type == :block &&
                receiver.loc.end.is?('end')

  range = Parser::Source::Range.new(receiver.loc.end.source_buffer,
                                    receiver.loc.end.begin_pos,
                                    node.source_range.end_pos)
  add_offense(nil, range)
end