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.'

Constants included from Util

Util::ASGN_NODES, Util::EQUALS_ASGN_NODES, Util::OPERATOR_METHODS, Util::PROC_NEW_NODE, 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, #autocorrect?, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, cop_name_with_namespace, cop_type, #debug?, #display_cop_names?, inherited, #initialize, #join_force?, lint?, #message, non_rails, qualified_cop_name, rails?, #relevant_file?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, block_length, command?, comment_line?, const_name, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, numeric_range_size, on_node, operator?, parentheses?, proc?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, within_node?

Methods included from PathUtil

issue_deprecation_warning, 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 18

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 28

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.loc.expression.end_pos)
  add_offense(nil, range)
end