Class: RuboCop::Cop::Metrics::ParameterLists

Inherits:

Cop

• Object
• Cop
• RuboCop::Cop::Metrics::ParameterLists

Includes:

ConfigurableMax

Defined in:

lib/rubocop/cop/metrics/parameter_lists.rb

Overview

This cop checks for methods with too many parameters. The maximum number of parameters in configurable. On Ruby 2.0+ keyword arguments can optionally be excluded from the total count.

Constant Summary

MSG =

'Avoid parameter lists longer than %d parameters.'

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

• #on_args(node) ⇒ Object

Methods included from ConfigurableMax

#max=, #parameter_name

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

#on_args(node) ⇒ Object

# File 'lib/rubocop/cop/metrics/parameter_lists.rb', line 15

def on_args(node)
  count = args_count(node)
  return unless count > max_params

  add_offense(node, :expression, format(MSG, max_params)) do
    self.max = count
  end
end