Class: RuboCop::Cop::Style::MethodCallParentheses

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

Overview

This cop checks for unwanted parentheses in parameterless method calls.

Constant Summary collapse

MSG =
'Do not use parentheses for method calls with no arguments.'

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_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

#autocorrect(node) ⇒ Object


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

def autocorrect(node)
  # Bail out if the call is going to be auto-corrected by EmptyLiteral.
  if config.for_cop('Style/EmptyLiteral')['Enabled'] &&
     [EmptyLiteral::HASH_NODE,
      EmptyLiteral::ARRAY_NODE,
      EmptyLiteral::STR_NODE].include?(node)
    return
  end
  @corrections << lambda do |corrector|
    corrector.remove(node.loc.begin)
    corrector.remove(node.loc.end)
  end
end

#on_send(node) ⇒ Object


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# File 'lib/rubocop/cop/style/method_call_parentheses.rb', line 10

def on_send(node)
  _receiver, method_name, *args = *node

  # methods starting with a capital letter should be skipped
  return if method_name =~ /\A[A-Z]/

  add_offense(node, :begin) if args.empty? && node.loc.begin
end