Class: RuboCop::Cop::Style::PreferredHashMethods

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

Overview

This cop (by default) checks for uses of methods Hash#has_key? and Hash#has_value? where it enforces Hash#key? and Hash#value? It is configurable to enforce the inverse, using ‘verbose` method names also.

Examples:


# EnforcedStyle: short (default)

# bad
Hash#has_key?
Hash#has_value?

# good
Hash#key?
Hash#value?

# EnforcedStyle: verbose

# bad
Hash#key?
Hash#value?

# good
Hash#has_key?
Hash#has_value?

Constant Summary collapse

MSG = 
'Use `Hash#%s` instead of `Hash#%s`.'.freeze
OFFENDING_SELECTORS = 
{
  short: [:has_key?, :has_value?],
  verbose: [:key?, :value?]
}.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 included from ConfigurableEnforcedStyle

#alternative_style, #ambiguous_style_detected, #correct_style_detected, #detected_style, #detected_style=, #no_acceptable_style!, #no_acceptable_style?, #opposite_style_detected, #parameter_name, #style, #style_detected, #supported_styles, #unexpected_style_detected

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?, #duplicate_location?, #excluded_file?, #extra_details?, #find_location, #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, #node_search_all, #node_search_body, #node_search_first

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?, compatible_external_encoding_for?, directions, double_quotes_acceptable?, double_quotes_required?, effective_column, ends_its_line?, escape_string, first_part_of_call_chain, hard_to_type?, interpret_string_escapes, line_distance, line_range, move_pos, needs_escaping?, numeric_range_size, on_node, operator?, parentheses?, parenthesized_call?, preceed?, range_between, range_with_surrounding_comma, range_with_surrounding_space, same_line?, source_range, strip_quotes, stripped_source_upto, 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

#autocorrect(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/preferred_hash_methods.rb', line 55

def autocorrect(node)
  lambda do |corrector|
    corrector.replace(node.loc.selector,
                      proper_method_name(node.loc.selector.source))
  end
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/preferred_hash_methods.rb', line 44

def on_send(node)
  _receiver, method_name, *args = *node
  return unless args.size == 1 &&
                offending_selector?(method_name)

  add_offense(node, :selector,
              format(MSG,
                     proper_method_name(method_name),
                     method_name))
end